J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2000-2007 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.awt.datatransfer; |
| 27 | |
| 28 | import java.awt.AWTError; |
| 29 | import java.awt.EventQueue; |
| 30 | import java.awt.Image; |
| 31 | import java.awt.Graphics; |
| 32 | import java.awt.Toolkit; |
| 33 | |
| 34 | import java.awt.datatransfer.DataFlavor; |
| 35 | import java.awt.datatransfer.FlavorMap; |
| 36 | import java.awt.datatransfer.FlavorTable; |
| 37 | import java.awt.datatransfer.StringSelection; |
| 38 | import java.awt.datatransfer.Transferable; |
| 39 | import java.awt.datatransfer.UnsupportedFlavorException; |
| 40 | |
| 41 | import java.io.BufferedReader; |
| 42 | import java.io.ByteArrayInputStream; |
| 43 | import java.io.ByteArrayOutputStream; |
| 44 | import java.io.File; |
| 45 | import java.io.InputStream; |
| 46 | import java.io.InputStreamReader; |
| 47 | import java.io.IOException; |
| 48 | import java.io.ObjectInputStream; |
| 49 | import java.io.ObjectOutputStream; |
| 50 | import java.io.Reader; |
| 51 | import java.io.SequenceInputStream; |
| 52 | import java.io.StringReader; |
| 53 | |
| 54 | import java.nio.ByteBuffer; |
| 55 | import java.nio.CharBuffer; |
| 56 | import java.nio.charset.Charset; |
| 57 | import java.nio.charset.CharsetEncoder; |
| 58 | import java.nio.charset.IllegalCharsetNameException; |
| 59 | import java.nio.charset.UnsupportedCharsetException; |
| 60 | |
| 61 | import java.lang.reflect.Constructor; |
| 62 | import java.lang.reflect.InvocationTargetException; |
| 63 | import java.lang.reflect.Method; |
| 64 | import java.lang.reflect.Modifier; |
| 65 | |
| 66 | import java.rmi.MarshalledObject; |
| 67 | |
| 68 | import java.security.AccessController; |
| 69 | import java.security.PrivilegedAction; |
| 70 | import java.security.PrivilegedActionException; |
| 71 | import java.security.PrivilegedExceptionAction; |
| 72 | |
| 73 | import java.util.ArrayList; |
| 74 | import java.util.Arrays; |
| 75 | import java.util.Collections; |
| 76 | import java.util.Comparator; |
| 77 | import java.util.HashMap; |
| 78 | import java.util.HashSet; |
| 79 | import java.util.Iterator; |
| 80 | import java.util.List; |
| 81 | import java.util.Map; |
| 82 | import java.util.SortedMap; |
| 83 | import java.util.SortedSet; |
| 84 | import java.util.Set; |
| 85 | import java.util.Stack; |
| 86 | import java.util.TreeMap; |
| 87 | import java.util.TreeSet; |
| 88 | |
| 89 | import java.util.logging.*; |
| 90 | |
| 91 | import sun.awt.AppContext; |
| 92 | import sun.awt.SunToolkit; |
| 93 | |
| 94 | import java.awt.image.BufferedImage; |
| 95 | import java.awt.image.ImageObserver; |
| 96 | import java.awt.image.RenderedImage; |
| 97 | import java.awt.image.WritableRaster; |
| 98 | import java.awt.image.ColorModel; |
| 99 | |
| 100 | import javax.imageio.ImageIO; |
| 101 | import javax.imageio.ImageReader; |
| 102 | import javax.imageio.ImageReadParam; |
| 103 | import javax.imageio.ImageWriter; |
| 104 | import javax.imageio.ImageTypeSpecifier; |
| 105 | |
| 106 | import javax.imageio.spi.ImageWriterSpi; |
| 107 | |
| 108 | import javax.imageio.stream.ImageInputStream; |
| 109 | import javax.imageio.stream.ImageOutputStream; |
| 110 | |
| 111 | import sun.awt.image.ImageRepresentation; |
| 112 | import sun.awt.image.ToolkitImage; |
| 113 | |
| 114 | |
| 115 | /** |
| 116 | * Provides a set of functions to be shared among the DataFlavor class and |
| 117 | * platform-specific data transfer implementations. |
| 118 | * |
| 119 | * The concept of "flavors" and "natives" is extended to include "formats", |
| 120 | * which are the numeric values Win32 and X11 use to express particular data |
| 121 | * types. Like FlavorMap, which provides getNativesForFlavors(DataFlavor[]) and |
| 122 | * getFlavorsForNatives(String[]) functions, DataTransferer provides a set |
| 123 | * of getFormatsFor(Transferable|Flavor|Flavors) and |
| 124 | * getFlavorsFor(Format|Formats) functions. |
| 125 | * |
| 126 | * Also provided are functions for translating a Transferable into a byte |
| 127 | * array, given a source DataFlavor and a target format, and for translating |
| 128 | * a byte array or InputStream into an Object, given a source format and |
| 129 | * a target DataFlavor. |
| 130 | * |
| 131 | * @author David Mendenhall |
| 132 | * @author Danila Sinopalnikov |
| 133 | * |
| 134 | * @since 1.3.1 |
| 135 | */ |
| 136 | public abstract class DataTransferer { |
| 137 | |
| 138 | /** |
| 139 | * Cached value of Class.forName("[C"); |
| 140 | */ |
| 141 | public static final Class charArrayClass; |
| 142 | |
| 143 | /** |
| 144 | * Cached value of Class.forName("[B"); |
| 145 | */ |
| 146 | public static final Class byteArrayClass; |
| 147 | |
| 148 | /** |
| 149 | * The <code>DataFlavor</code> representing plain text with Unicode |
| 150 | * encoding, where: |
| 151 | * <pre> |
| 152 | * representationClass = java.lang.String |
| 153 | * mimeType = "text/plain; charset=Unicode" |
| 154 | * </pre> |
| 155 | */ |
| 156 | public static final DataFlavor plainTextStringFlavor; |
| 157 | |
| 158 | /** |
| 159 | * The <code>DataFlavor</code> representing a Java text encoding String |
| 160 | * encoded in UTF-8, where |
| 161 | * <pre> |
| 162 | * representationClass = [B |
| 163 | * mimeType = "application/x-java-text-encoding" |
| 164 | * </pre> |
| 165 | */ |
| 166 | public static final DataFlavor javaTextEncodingFlavor; |
| 167 | |
| 168 | private static SortedSet standardEncodings; |
| 169 | |
| 170 | /** |
| 171 | * Tracks whether a particular text/* MIME type supports the charset |
| 172 | * parameter. The Map is initialized with all of the standard MIME types |
| 173 | * listed in the DataFlavor.selectBestTextFlavor method comment. Additional |
| 174 | * entries may be added during the life of the JRE for text/<other> types. |
| 175 | */ |
| 176 | private static final Map textMIMESubtypeCharsetSupport; |
| 177 | |
| 178 | /** |
| 179 | * Cache of the platform default encoding as specified in the |
| 180 | * "file.encoding" system property. |
| 181 | */ |
| 182 | private static String defaultEncoding; |
| 183 | |
| 184 | /** |
| 185 | * A collection of all natives listed in flavormap.properties with |
| 186 | * a primary MIME type of "text". |
| 187 | */ |
| 188 | private static final Set textNatives = |
| 189 | Collections.synchronizedSet(new HashSet()); |
| 190 | |
| 191 | /** |
| 192 | * The native encodings/charsets for the Set of textNatives. |
| 193 | */ |
| 194 | private static final Map nativeCharsets = |
| 195 | Collections.synchronizedMap(new HashMap()); |
| 196 | |
| 197 | /** |
| 198 | * The end-of-line markers for the Set of textNatives. |
| 199 | */ |
| 200 | private static final Map nativeEOLNs = |
| 201 | Collections.synchronizedMap(new HashMap()); |
| 202 | |
| 203 | /** |
| 204 | * The number of terminating NUL bytes for the Set of textNatives. |
| 205 | */ |
| 206 | private static final Map nativeTerminators = |
| 207 | Collections.synchronizedMap(new HashMap()); |
| 208 | |
| 209 | /** |
| 210 | * The key used to store pending data conversion requests for an AppContext. |
| 211 | */ |
| 212 | private static final String DATA_CONVERTER_KEY = "DATA_CONVERTER_KEY"; |
| 213 | |
| 214 | /** |
| 215 | * The singleton DataTransferer instance. It is created during MToolkit |
| 216 | * or WToolkit initialization. |
| 217 | */ |
| 218 | private static DataTransferer transferer; |
| 219 | |
| 220 | private static final Logger dtLog = Logger.getLogger("sun.awt.datatransfer.DataTransfer"); |
| 221 | |
| 222 | static { |
| 223 | Class tCharArrayClass = null, tByteArrayClass = null; |
| 224 | try { |
| 225 | tCharArrayClass = Class.forName("[C"); |
| 226 | tByteArrayClass = Class.forName("[B"); |
| 227 | } catch (ClassNotFoundException cannotHappen) { |
| 228 | } |
| 229 | charArrayClass = tCharArrayClass; |
| 230 | byteArrayClass = tByteArrayClass; |
| 231 | |
| 232 | DataFlavor tPlainTextStringFlavor = null; |
| 233 | try { |
| 234 | tPlainTextStringFlavor = new DataFlavor |
| 235 | ("text/plain;charset=Unicode;class=java.lang.String"); |
| 236 | } catch (ClassNotFoundException cannotHappen) { |
| 237 | } |
| 238 | plainTextStringFlavor = tPlainTextStringFlavor; |
| 239 | |
| 240 | DataFlavor tJavaTextEncodingFlavor = null; |
| 241 | try { |
| 242 | tJavaTextEncodingFlavor = new DataFlavor |
| 243 | ("application/x-java-text-encoding;class=\"[B\""); |
| 244 | } catch (ClassNotFoundException cannotHappen) { |
| 245 | } |
| 246 | javaTextEncodingFlavor = tJavaTextEncodingFlavor; |
| 247 | |
| 248 | Map tempMap = new HashMap(17); |
| 249 | tempMap.put("sgml", Boolean.TRUE); |
| 250 | tempMap.put("xml", Boolean.TRUE); |
| 251 | tempMap.put("html", Boolean.TRUE); |
| 252 | tempMap.put("enriched", Boolean.TRUE); |
| 253 | tempMap.put("richtext", Boolean.TRUE); |
| 254 | tempMap.put("uri-list", Boolean.TRUE); |
| 255 | tempMap.put("directory", Boolean.TRUE); |
| 256 | tempMap.put("css", Boolean.TRUE); |
| 257 | tempMap.put("calendar", Boolean.TRUE); |
| 258 | tempMap.put("plain", Boolean.TRUE); |
| 259 | tempMap.put("rtf", Boolean.FALSE); |
| 260 | tempMap.put("tab-separated-values", Boolean.FALSE); |
| 261 | tempMap.put("t140", Boolean.FALSE); |
| 262 | tempMap.put("rfc822-headers", Boolean.FALSE); |
| 263 | tempMap.put("parityfec", Boolean.FALSE); |
| 264 | textMIMESubtypeCharsetSupport = Collections.synchronizedMap(tempMap); |
| 265 | } |
| 266 | |
| 267 | /** |
| 268 | * The accessor method for the singleton DataTransferer instance. Note |
| 269 | * that in a headless environment, there may be no DataTransferer instance; |
| 270 | * instead, null will be returned. |
| 271 | */ |
| 272 | public static DataTransferer getInstance() { |
| 273 | if (transferer == null) { |
| 274 | synchronized (DataTransferer.class) { |
| 275 | if (transferer == null) { |
| 276 | final String name = SunToolkit. |
| 277 | getDataTransfererClassName(); |
| 278 | if (name != null) { |
| 279 | PrivilegedAction action = new PrivilegedAction() { |
| 280 | public Object run() { |
| 281 | Class cls = null; |
| 282 | Method method = null; |
| 283 | Object ret = null; |
| 284 | |
| 285 | try { |
| 286 | cls = Class.forName(name); |
| 287 | } catch (ClassNotFoundException e) { |
| 288 | ClassLoader cl = ClassLoader. |
| 289 | getSystemClassLoader(); |
| 290 | if (cl != null) { |
| 291 | try { |
| 292 | cls = cl.loadClass(name); |
| 293 | } catch (ClassNotFoundException ee) { |
| 294 | ee.printStackTrace(); |
| 295 | throw new AWTError("DataTransferer not found: " + name); |
| 296 | } |
| 297 | } |
| 298 | } |
| 299 | if (cls != null) { |
| 300 | try { |
| 301 | method = cls.getDeclaredMethod |
| 302 | ("getInstanceImpl"); |
| 303 | method.setAccessible(true); |
| 304 | } catch (NoSuchMethodException e) { |
| 305 | e.printStackTrace(); |
| 306 | throw new AWTError("Cannot instantiate DataTransferer: " + name); |
| 307 | } catch (SecurityException e) { |
| 308 | e.printStackTrace(); |
| 309 | throw new AWTError("Access is denied for DataTransferer: " + name); |
| 310 | } |
| 311 | } |
| 312 | if (method != null) { |
| 313 | try { |
| 314 | ret = method.invoke(null); |
| 315 | } catch (InvocationTargetException e) { |
| 316 | e.printStackTrace(); |
| 317 | throw new AWTError("Cannot instantiate DataTransferer: " + name); |
| 318 | } catch (IllegalAccessException e) { |
| 319 | e.printStackTrace(); |
| 320 | throw new AWTError("Cannot access DataTransferer: " + name); |
| 321 | } |
| 322 | } |
| 323 | return ret; |
| 324 | } |
| 325 | }; |
| 326 | transferer = (DataTransferer) |
| 327 | AccessController.doPrivileged(action); |
| 328 | } |
| 329 | } |
| 330 | } |
| 331 | } |
| 332 | return transferer; |
| 333 | } |
| 334 | |
| 335 | /** |
| 336 | * Converts an arbitrary text encoding to its canonical name. |
| 337 | */ |
| 338 | public static String canonicalName(String encoding) { |
| 339 | if (encoding == null) { |
| 340 | return null; |
| 341 | } |
| 342 | try { |
| 343 | return Charset.forName(encoding).name(); |
| 344 | } catch (IllegalCharsetNameException icne) { |
| 345 | return encoding; |
| 346 | } catch (UnsupportedCharsetException uce) { |
| 347 | return encoding; |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | /** |
| 352 | * If the specified flavor is a text flavor which supports the "charset" |
| 353 | * parameter, then this method returns that parameter, or the default |
| 354 | * charset if no such parameter was specified at construction. For non- |
| 355 | * text DataFlavors, and for non-charset text flavors, this method returns |
| 356 | * null. |
| 357 | */ |
| 358 | public static String getTextCharset(DataFlavor flavor) { |
| 359 | if (!isFlavorCharsetTextType(flavor)) { |
| 360 | return null; |
| 361 | } |
| 362 | |
| 363 | String encoding = flavor.getParameter("charset"); |
| 364 | |
| 365 | return (encoding != null) ? encoding : getDefaultTextCharset(); |
| 366 | } |
| 367 | |
| 368 | /** |
| 369 | * Returns the platform's default character encoding. |
| 370 | */ |
| 371 | public static String getDefaultTextCharset() { |
| 372 | if (defaultEncoding != null) { |
| 373 | return defaultEncoding; |
| 374 | } |
| 375 | return defaultEncoding = Charset.defaultCharset().name(); |
| 376 | } |
| 377 | |
| 378 | /** |
| 379 | * Tests only whether the flavor's MIME type supports the charset |
| 380 | * parameter. Must only be called for flavors with a primary type of |
| 381 | * "text". |
| 382 | */ |
| 383 | public static boolean doesSubtypeSupportCharset(DataFlavor flavor) { |
| 384 | if (dtLog.isLoggable(Level.FINE)) { |
| 385 | if (!"text".equals(flavor.getPrimaryType())) { |
| 386 | dtLog.log(Level.FINE, "Assertion (\"text\".equals(flavor.getPrimaryType())) failed"); |
| 387 | } |
| 388 | } |
| 389 | |
| 390 | String subType = flavor.getSubType(); |
| 391 | if (subType == null) { |
| 392 | return false; |
| 393 | } |
| 394 | |
| 395 | Object support = textMIMESubtypeCharsetSupport.get(subType); |
| 396 | |
| 397 | if (support != null) { |
| 398 | return (support == Boolean.TRUE); |
| 399 | } |
| 400 | |
| 401 | boolean ret_val = (flavor.getParameter("charset") != null); |
| 402 | textMIMESubtypeCharsetSupport.put |
| 403 | (subType, (ret_val) ? Boolean.TRUE : Boolean.FALSE); |
| 404 | return ret_val; |
| 405 | } |
| 406 | public static boolean doesSubtypeSupportCharset(String subType, |
| 407 | String charset) |
| 408 | { |
| 409 | Object support = textMIMESubtypeCharsetSupport.get(subType); |
| 410 | |
| 411 | if (support != null) { |
| 412 | return (support == Boolean.TRUE); |
| 413 | } |
| 414 | |
| 415 | boolean ret_val = (charset != null); |
| 416 | textMIMESubtypeCharsetSupport.put |
| 417 | (subType, (ret_val) ? Boolean.TRUE : Boolean.FALSE); |
| 418 | return ret_val; |
| 419 | } |
| 420 | |
| 421 | /** |
| 422 | * Returns whether this flavor is a text type which supports the |
| 423 | * 'charset' parameter. |
| 424 | */ |
| 425 | public static boolean isFlavorCharsetTextType(DataFlavor flavor) { |
| 426 | // Although stringFlavor doesn't actually support the charset |
| 427 | // parameter (because its primary MIME type is not "text"), it should |
| 428 | // be treated as though it does. stringFlavor is semantically |
| 429 | // equivalent to "text/plain" data. |
| 430 | if (DataFlavor.stringFlavor.equals(flavor)) { |
| 431 | return true; |
| 432 | } |
| 433 | |
| 434 | if (!"text".equals(flavor.getPrimaryType()) || |
| 435 | !doesSubtypeSupportCharset(flavor)) |
| 436 | { |
| 437 | return false; |
| 438 | } |
| 439 | |
| 440 | Class rep_class = flavor.getRepresentationClass(); |
| 441 | |
| 442 | if (flavor.isRepresentationClassReader() || |
| 443 | String.class.equals(rep_class) || |
| 444 | flavor.isRepresentationClassCharBuffer() || |
| 445 | DataTransferer.charArrayClass.equals(rep_class)) |
| 446 | { |
| 447 | return true; |
| 448 | } |
| 449 | |
| 450 | if (!(flavor.isRepresentationClassInputStream() || |
| 451 | flavor.isRepresentationClassByteBuffer() || |
| 452 | DataTransferer.byteArrayClass.equals(rep_class))) { |
| 453 | return false; |
| 454 | } |
| 455 | |
| 456 | String charset = flavor.getParameter("charset"); |
| 457 | |
| 458 | return (charset != null) |
| 459 | ? DataTransferer.isEncodingSupported(charset) |
| 460 | : true; // null equals default encoding which is always supported |
| 461 | } |
| 462 | |
| 463 | /** |
| 464 | * Returns whether this flavor is a text type which does not support the |
| 465 | * 'charset' parameter. |
| 466 | */ |
| 467 | public static boolean isFlavorNoncharsetTextType(DataFlavor flavor) { |
| 468 | if (!"text".equals(flavor.getPrimaryType()) || |
| 469 | doesSubtypeSupportCharset(flavor)) |
| 470 | { |
| 471 | return false; |
| 472 | } |
| 473 | |
| 474 | return (flavor.isRepresentationClassInputStream() || |
| 475 | flavor.isRepresentationClassByteBuffer() || |
| 476 | DataTransferer.byteArrayClass. |
| 477 | equals(flavor.getRepresentationClass())); |
| 478 | } |
| 479 | |
| 480 | /** |
| 481 | * Determines whether this JRE can both encode and decode text in the |
| 482 | * specified encoding. |
| 483 | */ |
| 484 | public static boolean isEncodingSupported(String encoding) { |
| 485 | if (encoding == null) { |
| 486 | return false; |
| 487 | } |
| 488 | try { |
| 489 | return Charset.isSupported(encoding); |
| 490 | } catch (IllegalCharsetNameException icne) { |
| 491 | return false; |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | /** |
| 496 | * Returns an Iterator which traverses a SortedSet of Strings which are |
| 497 | * a total order of the standard character sets supported by the JRE. The |
| 498 | * ordering follows the same principles as DataFlavor.selectBestTextFlavor. |
| 499 | * So as to avoid loading all available character converters, optional, |
| 500 | * non-standard, character sets are not included. |
| 501 | */ |
| 502 | public static Iterator standardEncodings() { |
| 503 | if (standardEncodings == null) { |
| 504 | TreeSet tempSet = new TreeSet(defaultCharsetComparator); |
| 505 | tempSet.add("US-ASCII"); |
| 506 | tempSet.add("ISO-8859-1"); |
| 507 | tempSet.add("UTF-8"); |
| 508 | tempSet.add("UTF-16BE"); |
| 509 | tempSet.add("UTF-16LE"); |
| 510 | tempSet.add("UTF-16"); |
| 511 | tempSet.add(getDefaultTextCharset()); |
| 512 | standardEncodings = Collections.unmodifiableSortedSet(tempSet); |
| 513 | } |
| 514 | return standardEncodings.iterator(); |
| 515 | } |
| 516 | |
| 517 | /** |
| 518 | * Converts a FlavorMap to a FlavorTable. |
| 519 | */ |
| 520 | public static FlavorTable adaptFlavorMap(final FlavorMap map) { |
| 521 | if (map instanceof FlavorTable) { |
| 522 | return (FlavorTable)map; |
| 523 | } |
| 524 | |
| 525 | return new FlavorTable() { |
| 526 | public Map getNativesForFlavors(DataFlavor[] flavors) { |
| 527 | return map.getNativesForFlavors(flavors); |
| 528 | } |
| 529 | public Map getFlavorsForNatives(String[] natives) { |
| 530 | return map.getFlavorsForNatives(natives); |
| 531 | } |
| 532 | public List getNativesForFlavor(DataFlavor flav) { |
| 533 | Map natives = |
| 534 | getNativesForFlavors(new DataFlavor[] { flav } ); |
| 535 | String nat = (String)natives.get(flav); |
| 536 | if (nat != null) { |
| 537 | List list = new ArrayList(1); |
| 538 | list.add(nat); |
| 539 | return list; |
| 540 | } else { |
| 541 | return Collections.EMPTY_LIST; |
| 542 | } |
| 543 | } |
| 544 | public List getFlavorsForNative(String nat) { |
| 545 | Map flavors = |
| 546 | getFlavorsForNatives(new String[] { nat } ); |
| 547 | DataFlavor flavor = (DataFlavor)flavors.get(nat); |
| 548 | if (flavor != null) { |
| 549 | List list = new ArrayList(1); |
| 550 | list.add(flavor); |
| 551 | return list; |
| 552 | } else { |
| 553 | return Collections.EMPTY_LIST; |
| 554 | } |
| 555 | } |
| 556 | }; |
| 557 | } |
| 558 | |
| 559 | /** |
| 560 | * Returns the default Unicode encoding for the platform. The encoding |
| 561 | * need not be canonical. This method is only used by the archaic function |
| 562 | * DataFlavor.getTextPlainUnicodeFlavor(). |
| 563 | */ |
| 564 | public abstract String getDefaultUnicodeEncoding(); |
| 565 | |
| 566 | /** |
| 567 | * This method is called for text flavor mappings established while parsing |
| 568 | * the flavormap.properties file. It stores the "eoln" and "terminators" |
| 569 | * parameters which are not officially part of the MIME type. They are |
| 570 | * MIME parameters specific to the flavormap.properties file format. |
| 571 | */ |
| 572 | public void registerTextFlavorProperties(String nat, String charset, |
| 573 | String eoln, String terminators) { |
| 574 | Long format = getFormatForNativeAsLong(nat); |
| 575 | |
| 576 | textNatives.add(format); |
| 577 | nativeCharsets.put(format, (charset != null && charset.length() != 0) |
| 578 | ? charset : getDefaultTextCharset()); |
| 579 | if (eoln != null && eoln.length() != 0 && !eoln.equals("\n")) { |
| 580 | nativeEOLNs.put(format, eoln); |
| 581 | } |
| 582 | if (terminators != null && terminators.length() != 0) { |
| 583 | Integer iTerminators = Integer.valueOf(terminators); |
| 584 | if (iTerminators.intValue() > 0) { |
| 585 | nativeTerminators.put(format, iTerminators); |
| 586 | } |
| 587 | } |
| 588 | } |
| 589 | |
| 590 | /** |
| 591 | * Determines whether the native corresponding to the specified long format |
| 592 | * was listed in the flavormap.properties file. |
| 593 | */ |
| 594 | protected boolean isTextFormat(long format) { |
| 595 | return textNatives.contains(Long.valueOf(format)); |
| 596 | } |
| 597 | |
| 598 | protected String getCharsetForTextFormat(Long lFormat) { |
| 599 | return (String)nativeCharsets.get(lFormat); |
| 600 | } |
| 601 | |
| 602 | /** |
| 603 | * Specifies whether text imported from the native system in the specified |
| 604 | * format is locale-dependent. If so, when decoding such text, |
| 605 | * 'nativeCharsets' should be ignored, and instead, the Transferable should |
| 606 | * be queried for its javaTextEncodingFlavor data for the correct encoding. |
| 607 | */ |
| 608 | public abstract boolean isLocaleDependentTextFormat(long format); |
| 609 | |
| 610 | /** |
| 611 | * Determines whether the DataFlavor corresponding to the specified long |
| 612 | * format is DataFlavor.javaFileListFlavor. |
| 613 | */ |
| 614 | public abstract boolean isFileFormat(long format); |
| 615 | |
| 616 | /** |
| 617 | * Determines whether the DataFlavor corresponding to the specified long |
| 618 | * format is DataFlavor.imageFlavor. |
| 619 | */ |
| 620 | public abstract boolean isImageFormat(long format); |
| 621 | |
| 622 | /** |
| 623 | * Returns a Map whose keys are all of the possible formats into which the |
| 624 | * Transferable's transfer data flavors can be translated. The value of |
| 625 | * each key is the DataFlavor in which the Transferable's data should be |
| 626 | * requested when converting to the format. |
| 627 | * <p> |
| 628 | * The map keys are sorted according to the native formats preference |
| 629 | * order. |
| 630 | */ |
| 631 | public SortedMap getFormatsForTransferable(Transferable contents, |
| 632 | FlavorTable map) { |
| 633 | DataFlavor[] flavors = contents.getTransferDataFlavors(); |
| 634 | if (flavors == null) { |
| 635 | return new TreeMap(); |
| 636 | } |
| 637 | return getFormatsForFlavors(flavors, map); |
| 638 | } |
| 639 | |
| 640 | /** |
| 641 | * Returns a Map whose keys are all of the possible formats into which data |
| 642 | * in the specified DataFlavor can be translated. The value of each key |
| 643 | * is the DataFlavor in which a Transferable's data should be requested |
| 644 | * when converting to the format. |
| 645 | * <p> |
| 646 | * The map keys are sorted according to the native formats preference |
| 647 | * order. |
| 648 | */ |
| 649 | public SortedMap getFormatsForFlavor(DataFlavor flavor, FlavorTable map) { |
| 650 | return getFormatsForFlavors(new DataFlavor[] { flavor }, |
| 651 | map); |
| 652 | } |
| 653 | |
| 654 | /** |
| 655 | * Returns a Map whose keys are all of the possible formats into which data |
| 656 | * in the specified DataFlavors can be translated. The value of each key |
| 657 | * is the DataFlavor in which the Transferable's data should be requested |
| 658 | * when converting to the format. |
| 659 | * <p> |
| 660 | * The map keys are sorted according to the native formats preference |
| 661 | * order. |
| 662 | * |
| 663 | * @param flavors the data flavors |
| 664 | * @param map the FlavorTable which contains mappings between |
| 665 | * DataFlavors and data formats |
| 666 | * @throws NullPointerException if flavors or map is <code>null</code> |
| 667 | */ |
| 668 | public SortedMap getFormatsForFlavors(DataFlavor[] flavors, FlavorTable map) { |
| 669 | Map formatMap = new HashMap(flavors.length); |
| 670 | Map textPlainMap = new HashMap(flavors.length); |
| 671 | // Maps formats to indices that will be used to sort the formats |
| 672 | // according to the preference order. |
| 673 | // Larger index value corresponds to the more preferable format. |
| 674 | Map indexMap = new HashMap(flavors.length); |
| 675 | Map textPlainIndexMap = new HashMap(flavors.length); |
| 676 | |
| 677 | int currentIndex = 0; |
| 678 | |
| 679 | // Iterate backwards so that preferred DataFlavors are used over |
| 680 | // other DataFlavors. (See javadoc for |
| 681 | // Transferable.getTransferDataFlavors.) |
| 682 | for (int i = flavors.length - 1; i >= 0; i--) { |
| 683 | DataFlavor flavor = flavors[i]; |
| 684 | if (flavor == null) continue; |
| 685 | |
| 686 | // Don't explicitly test for String, since it is just a special |
| 687 | // case of Serializable |
| 688 | if (flavor.isFlavorTextType() || |
| 689 | flavor.isFlavorJavaFileListType() || |
| 690 | DataFlavor.imageFlavor.equals(flavor) || |
| 691 | flavor.isRepresentationClassSerializable() || |
| 692 | flavor.isRepresentationClassInputStream() || |
| 693 | flavor.isRepresentationClassRemote()) |
| 694 | { |
| 695 | List natives = map.getNativesForFlavor(flavor); |
| 696 | |
| 697 | currentIndex += natives.size(); |
| 698 | |
| 699 | for (Iterator iter = natives.iterator(); iter.hasNext(); ) { |
| 700 | Long lFormat = |
| 701 | getFormatForNativeAsLong((String)iter.next()); |
| 702 | Integer index = Integer.valueOf(currentIndex--); |
| 703 | |
| 704 | formatMap.put(lFormat, flavor); |
| 705 | indexMap.put(lFormat, index); |
| 706 | |
| 707 | // SystemFlavorMap.getNativesForFlavor will return |
| 708 | // text/plain natives for all text/*. While this is good |
| 709 | // for a single text/* flavor, we would prefer that |
| 710 | // text/plain native data come from a text/plain flavor. |
| 711 | if (("text".equals(flavor.getPrimaryType()) && |
| 712 | "plain".equals(flavor.getSubType())) || |
| 713 | flavor.equals(DataFlavor.stringFlavor)) |
| 714 | { |
| 715 | textPlainMap.put(lFormat, flavor); |
| 716 | textPlainIndexMap.put(lFormat, index); |
| 717 | } |
| 718 | } |
| 719 | |
| 720 | currentIndex += natives.size(); |
| 721 | } |
| 722 | } |
| 723 | |
| 724 | formatMap.putAll(textPlainMap); |
| 725 | indexMap.putAll(textPlainIndexMap); |
| 726 | |
| 727 | // Sort the map keys according to the formats preference order. |
| 728 | Comparator comparator = |
| 729 | new IndexOrderComparator(indexMap, IndexedComparator.SELECT_WORST); |
| 730 | SortedMap sortedMap = new TreeMap(comparator); |
| 731 | sortedMap.putAll(formatMap); |
| 732 | |
| 733 | return sortedMap; |
| 734 | } |
| 735 | |
| 736 | /** |
| 737 | * Reduces the Map output for the root function to an array of the |
| 738 | * Map's keys. |
| 739 | */ |
| 740 | public long[] getFormatsForTransferableAsArray(Transferable contents, |
| 741 | FlavorTable map) { |
| 742 | return keysToLongArray(getFormatsForTransferable(contents, map)); |
| 743 | } |
| 744 | public long[] getFormatsForFlavorAsArray(DataFlavor flavor, |
| 745 | FlavorTable map) { |
| 746 | return keysToLongArray(getFormatsForFlavor(flavor, map)); |
| 747 | } |
| 748 | public long[] getFormatsForFlavorsAsArray(DataFlavor[] flavors, |
| 749 | FlavorTable map) { |
| 750 | return keysToLongArray(getFormatsForFlavors(flavors, map)); |
| 751 | } |
| 752 | |
| 753 | /** |
| 754 | * Returns a Map whose keys are all of the possible DataFlavors into which |
| 755 | * data in the specified format can be translated. The value of each key |
| 756 | * is the format in which the Clipboard or dropped data should be requested |
| 757 | * when converting to the DataFlavor. |
| 758 | */ |
| 759 | public Map getFlavorsForFormat(long format, FlavorTable map) { |
| 760 | return getFlavorsForFormats(new long[] { format }, map); |
| 761 | } |
| 762 | |
| 763 | /** |
| 764 | * Returns a Map whose keys are all of the possible DataFlavors into which |
| 765 | * data in the specified formats can be translated. The value of each key |
| 766 | * is the format in which the Clipboard or dropped data should be requested |
| 767 | * when converting to the DataFlavor. |
| 768 | */ |
| 769 | public Map getFlavorsForFormats(long[] formats, FlavorTable map) { |
| 770 | Map flavorMap = new HashMap(formats.length); |
| 771 | Set mappingSet = new HashSet(formats.length); |
| 772 | Set flavorSet = new HashSet(formats.length); |
| 773 | |
| 774 | // First step: build flavorSet, mappingSet and initial flavorMap |
| 775 | // flavorSet - the set of all the DataFlavors into which |
| 776 | // data in the specified formats can be translated; |
| 777 | // mappingSet - the set of all the mappings from the specified formats |
| 778 | // into any DataFlavor; |
| 779 | // flavorMap - after this step, this map maps each of the DataFlavors |
| 780 | // from flavorSet to any of the specified formats. |
| 781 | for (int i = 0; i < formats.length; i++) { |
| 782 | long format = formats[i]; |
| 783 | String nat = getNativeForFormat(format); |
| 784 | List flavors = map.getFlavorsForNative(nat); |
| 785 | |
| 786 | for (Iterator iter = flavors.iterator(); iter.hasNext(); ) { |
| 787 | DataFlavor flavor = (DataFlavor)iter.next(); |
| 788 | |
| 789 | // Don't explicitly test for String, since it is just a special |
| 790 | // case of Serializable |
| 791 | if (flavor.isFlavorTextType() || |
| 792 | flavor.isFlavorJavaFileListType() || |
| 793 | DataFlavor.imageFlavor.equals(flavor) || |
| 794 | flavor.isRepresentationClassSerializable() || |
| 795 | flavor.isRepresentationClassInputStream() || |
| 796 | flavor.isRepresentationClassRemote()) |
| 797 | { |
| 798 | Long lFormat = Long.valueOf(format); |
| 799 | Object mapping = |
| 800 | DataTransferer.createMapping(lFormat, flavor); |
| 801 | flavorMap.put(flavor, lFormat); |
| 802 | mappingSet.add(mapping); |
| 803 | flavorSet.add(flavor); |
| 804 | } |
| 805 | } |
| 806 | } |
| 807 | |
| 808 | // Second step: for each DataFlavor try to figure out which of the |
| 809 | // specified formats is the best to translate to this flavor. |
| 810 | // Then map each flavor to the best format. |
| 811 | // For the given flavor, FlavorTable indicates which native will |
| 812 | // best reflect data in the specified flavor to the underlying native |
| 813 | // platform. We assume that this native is the best to translate |
| 814 | // to this flavor. |
| 815 | // Note: FlavorTable allows one-way mappings, so we can occasionally |
| 816 | // map a flavor to the format for which the corresponding |
| 817 | // format-to-flavor mapping doesn't exist. For this reason we have built |
| 818 | // a mappingSet of all format-to-flavor mappings for the specified formats |
| 819 | // and check if the format-to-flavor mapping exists for the |
| 820 | // (flavor,format) pair being added. |
| 821 | for (Iterator flavorIter = flavorSet.iterator(); |
| 822 | flavorIter.hasNext(); ) { |
| 823 | DataFlavor flavor = (DataFlavor)flavorIter.next(); |
| 824 | |
| 825 | List natives = map.getNativesForFlavor(flavor); |
| 826 | |
| 827 | for (Iterator nativeIter = natives.iterator(); |
| 828 | nativeIter.hasNext(); ) { |
| 829 | Long lFormat = |
| 830 | getFormatForNativeAsLong((String)nativeIter.next()); |
| 831 | Object mapping = DataTransferer.createMapping(lFormat, flavor); |
| 832 | |
| 833 | if (mappingSet.contains(mapping)) { |
| 834 | flavorMap.put(flavor, lFormat); |
| 835 | break; |
| 836 | } |
| 837 | } |
| 838 | } |
| 839 | |
| 840 | return flavorMap; |
| 841 | } |
| 842 | |
| 843 | /** |
| 844 | * Returns a Set of all DataFlavors for which |
| 845 | * 1) a mapping from at least one of the specified formats exists in the |
| 846 | * specified map and |
| 847 | * 2) the data translation for this mapping can be performed by the data |
| 848 | * transfer subsystem. |
| 849 | * |
| 850 | * @param formats the data formats |
| 851 | * @param map the FlavorTable which contains mappings between |
| 852 | * DataFlavors and data formats |
| 853 | * @throws NullPointerException if formats or map is <code>null</code> |
| 854 | */ |
| 855 | public Set getFlavorsForFormatsAsSet(long[] formats, FlavorTable map) { |
| 856 | Set flavorSet = new HashSet(formats.length); |
| 857 | |
| 858 | for (int i = 0; i < formats.length; i++) { |
| 859 | String nat = getNativeForFormat(formats[i]); |
| 860 | List flavors = map.getFlavorsForNative(nat); |
| 861 | |
| 862 | for (Iterator iter = flavors.iterator(); iter.hasNext(); ) { |
| 863 | DataFlavor flavor = (DataFlavor)iter.next(); |
| 864 | |
| 865 | // Don't explicitly test for String, since it is just a special |
| 866 | // case of Serializable |
| 867 | if (flavor.isFlavorTextType() || |
| 868 | flavor.isFlavorJavaFileListType() || |
| 869 | DataFlavor.imageFlavor.equals(flavor) || |
| 870 | flavor.isRepresentationClassSerializable() || |
| 871 | flavor.isRepresentationClassInputStream() || |
| 872 | flavor.isRepresentationClassRemote()) |
| 873 | { |
| 874 | flavorSet.add(flavor); |
| 875 | } |
| 876 | } |
| 877 | } |
| 878 | |
| 879 | return flavorSet; |
| 880 | } |
| 881 | |
| 882 | /** |
| 883 | * Returns an array of all DataFlavors for which |
| 884 | * 1) a mapping from the specified format exists in the specified map and |
| 885 | * 2) the data translation for this mapping can be performed by the data |
| 886 | * transfer subsystem. |
| 887 | * The array will be sorted according to a |
| 888 | * <code>DataFlavorComparator</code> created with the specified |
| 889 | * map as an argument. |
| 890 | * |
| 891 | * @param format the data format |
| 892 | * @param map the FlavorTable which contains mappings between |
| 893 | * DataFlavors and data formats |
| 894 | * @throws NullPointerException if map is <code>null</code> |
| 895 | */ |
| 896 | public DataFlavor[] getFlavorsForFormatAsArray(long format, |
| 897 | FlavorTable map) { |
| 898 | return getFlavorsForFormatsAsArray(new long[] { format }, map); |
| 899 | } |
| 900 | |
| 901 | /** |
| 902 | * Returns an array of all DataFlavors for which |
| 903 | * 1) a mapping from at least one of the specified formats exists in the |
| 904 | * specified map and |
| 905 | * 2) the data translation for this mapping can be performed by the data |
| 906 | * transfer subsystem. |
| 907 | * The array will be sorted according to a |
| 908 | * <code>DataFlavorComparator</code> created with the specified |
| 909 | * map as an argument. |
| 910 | * |
| 911 | * @param formats the data formats |
| 912 | * @param map the FlavorTable which contains mappings between |
| 913 | * DataFlavors and data formats |
| 914 | * @throws NullPointerException if formats or map is <code>null</code> |
| 915 | */ |
| 916 | public DataFlavor[] getFlavorsForFormatsAsArray(long[] formats, |
| 917 | FlavorTable map) { |
| 918 | // getFlavorsForFormatsAsSet() is less expensive than |
| 919 | // getFlavorsForFormats(). |
| 920 | return setToSortedDataFlavorArray(getFlavorsForFormatsAsSet(formats, map)); |
| 921 | } |
| 922 | |
| 923 | /** |
| 924 | * Returns an object that represents a mapping between the specified |
| 925 | * key and value. <tt>null</tt> values and the <tt>null</tt> keys are |
| 926 | * permitted. The internal representation of the mapping object is |
| 927 | * irrelevant. The only requrement is that the two mapping objects are equal |
| 928 | * if and only if their keys are equal and their values are equal. |
| 929 | * More formally, the two mapping objects are equal if and only if |
| 930 | * <tt>(value1 == null ? value2 == null : value1.equals(value2)) |
| 931 | * && (key1 == null ? key2 == null : key1.equals(key2))</tt>. |
| 932 | */ |
| 933 | private static Object createMapping(Object key, Object value) { |
| 934 | // NOTE: Should be updated to use AbstractMap.SimpleEntry as |
| 935 | // soon as it is made public. |
| 936 | return Arrays.asList(new Object[] { key, value }); |
| 937 | } |
| 938 | |
| 939 | /** |
| 940 | * Looks-up or registers the String native with the native data transfer |
| 941 | * system and returns a long format corresponding to that native. |
| 942 | */ |
| 943 | protected abstract Long getFormatForNativeAsLong(String str); |
| 944 | |
| 945 | /** |
| 946 | * Looks-up the String native corresponding to the specified long format in |
| 947 | * the native data transfer system. |
| 948 | */ |
| 949 | protected abstract String getNativeForFormat(long format); |
| 950 | |
| 951 | /* Contains common code for finding the best charset for |
| 952 | * clipboard string encoding/decoding, basing on clipboard |
| 953 | * format and localeTransferable(on decoding, if available) |
| 954 | */ |
| 955 | private String getBestCharsetForTextFormat(Long lFormat, |
| 956 | Transferable localeTransferable) throws IOException |
| 957 | { |
| 958 | String charset = null; |
| 959 | if (localeTransferable != null && |
| 960 | isLocaleDependentTextFormat(lFormat) && |
| 961 | localeTransferable.isDataFlavorSupported(javaTextEncodingFlavor)) |
| 962 | { |
| 963 | try { |
| 964 | charset = new String( |
| 965 | (byte[])localeTransferable.getTransferData(javaTextEncodingFlavor), |
| 966 | "UTF-8" |
| 967 | ); |
| 968 | } catch (UnsupportedFlavorException cannotHappen) { |
| 969 | } |
| 970 | } else { |
| 971 | charset = getCharsetForTextFormat(lFormat); |
| 972 | } |
| 973 | if (charset == null) { |
| 974 | // Only happens when we have a custom text type. |
| 975 | charset = getDefaultTextCharset(); |
| 976 | } |
| 977 | return charset; |
| 978 | } |
| 979 | |
| 980 | /** |
| 981 | * Translation function for converting string into |
| 982 | * a byte array. Search-and-replace EOLN. Encode into the |
| 983 | * target format. Append terminating NUL bytes. |
| 984 | * |
| 985 | * Java to Native string conversion |
| 986 | */ |
| 987 | private byte[] translateTransferableString(String str, |
| 988 | long format) throws IOException |
| 989 | { |
| 990 | Long lFormat = Long.valueOf(format); |
| 991 | String charset = getBestCharsetForTextFormat(lFormat, null); |
| 992 | // Search and replace EOLN. Note that if EOLN is "\n", then we |
| 993 | // never added an entry to nativeEOLNs anyway, so we'll skip this |
| 994 | // code altogether. |
| 995 | // windows: "abc\nde"->"abc\r\nde" |
| 996 | String eoln = (String)nativeEOLNs.get(lFormat); |
| 997 | if (eoln != null) { |
| 998 | int length = str.length(); |
| 999 | StringBuffer buffer = |
| 1000 | new StringBuffer(length * 2); // 2 is a heuristic |
| 1001 | for (int i = 0; i < length; i++) { |
| 1002 | // Fix for 4914613 - skip native EOLN |
| 1003 | if (str.startsWith(eoln, i)) { |
| 1004 | buffer.append(eoln); |
| 1005 | i += eoln.length() - 1; |
| 1006 | continue; |
| 1007 | } |
| 1008 | char c = str.charAt(i); |
| 1009 | if (c == '\n') { |
| 1010 | buffer.append(eoln); |
| 1011 | } else { |
| 1012 | buffer.append(c); |
| 1013 | } |
| 1014 | } |
| 1015 | str = buffer.toString(); |
| 1016 | } |
| 1017 | |
| 1018 | // Encode text in target format. |
| 1019 | byte[] bytes = str.getBytes(charset); |
| 1020 | |
| 1021 | // Append terminating NUL bytes. Note that if terminators is 0, |
| 1022 | // the we never added an entry to nativeTerminators anyway, so |
| 1023 | // we'll skip code altogether. |
| 1024 | // "abcde" -> "abcde\0" |
| 1025 | Integer terminators = (Integer)nativeTerminators.get(lFormat); |
| 1026 | if (terminators != null) { |
| 1027 | int numTerminators = terminators.intValue(); |
| 1028 | byte[] terminatedBytes = |
| 1029 | new byte[bytes.length + numTerminators]; |
| 1030 | System.arraycopy(bytes, 0, terminatedBytes, 0, bytes.length); |
| 1031 | for (int i = bytes.length; i < terminatedBytes.length; i++) { |
| 1032 | terminatedBytes[i] = 0x0; |
| 1033 | } |
| 1034 | bytes = terminatedBytes; |
| 1035 | } |
| 1036 | return bytes; |
| 1037 | } |
| 1038 | |
| 1039 | /** |
| 1040 | * Translating either a byte array or an InputStream into an String. |
| 1041 | * Strip terminators and search-and-replace EOLN. |
| 1042 | * |
| 1043 | * Native to Java string conversion |
| 1044 | */ |
| 1045 | private String translateBytesOrStreamToString(InputStream str, byte[] bytes, |
| 1046 | long format, |
| 1047 | Transferable localeTransferable) |
| 1048 | throws IOException |
| 1049 | { |
| 1050 | // A String holds all of its data in memory at one time, so |
| 1051 | // we can't avoid reading the entire InputStream at this point. |
| 1052 | if (bytes == null) { |
| 1053 | bytes = inputStreamToByteArray(str); |
| 1054 | } |
| 1055 | str.close(); |
| 1056 | |
| 1057 | Long lFormat = Long.valueOf(format); |
| 1058 | String charset = getBestCharsetForTextFormat(lFormat, localeTransferable); |
| 1059 | |
| 1060 | // Locate terminating NUL bytes. Note that if terminators is 0, |
| 1061 | // the we never added an entry to nativeTerminators anyway, so |
| 1062 | // we'll skip code altogether. |
| 1063 | |
| 1064 | // In other words: we are doing char alignment here basing on suggestion |
| 1065 | // that count of zero-'terminators' is a number of bytes in one symbol |
| 1066 | // for selected charset (clipboard format). It is not complitly true for |
| 1067 | // multibyte coding like UTF-8, but helps understand the procedure. |
| 1068 | // "abcde\0" -> "abcde" |
| 1069 | |
| 1070 | String eoln = (String)nativeEOLNs.get(lFormat); |
| 1071 | Integer terminators = (Integer)nativeTerminators.get(lFormat); |
| 1072 | int count; |
| 1073 | if (terminators != null) { |
| 1074 | int numTerminators = terminators.intValue(); |
| 1075 | search: |
| 1076 | for (count = 0; count < (bytes.length - numTerminators + 1); count += numTerminators) { |
| 1077 | for (int i = count; i < count + numTerminators; i++) { |
| 1078 | if (bytes[i] != 0x0) { |
| 1079 | continue search; |
| 1080 | } |
| 1081 | } |
| 1082 | // found terminators |
| 1083 | break search; |
| 1084 | } |
| 1085 | } else { |
| 1086 | count = bytes.length; |
| 1087 | } |
| 1088 | |
| 1089 | // Decode text to chars. Don't include any terminators. |
| 1090 | String converted = new String(bytes, 0, count, charset); |
| 1091 | |
| 1092 | // Search and replace EOLN. Note that if EOLN is "\n", then we |
| 1093 | // never added an entry to nativeEOLNs anyway, so we'll skip this |
| 1094 | // code altogether. |
| 1095 | // Count of NUL-terminators and EOLN coding are platform-specific and |
| 1096 | // loaded from flavormap.properties file |
| 1097 | // windows: "abc\r\nde" -> "abc\nde" |
| 1098 | |
| 1099 | if (eoln != null) { |
| 1100 | |
| 1101 | /* Fix for 4463560: replace EOLNs symbol-by-symbol instead |
| 1102 | * of using buf.replace() |
| 1103 | */ |
| 1104 | |
| 1105 | char[] buf = converted.toCharArray(); |
| 1106 | char[] eoln_arr = eoln.toCharArray(); |
| 1107 | converted = null; |
| 1108 | int j = 0; |
| 1109 | boolean match; |
| 1110 | |
| 1111 | for (int i = 0; i < buf.length; ) { |
| 1112 | // Catch last few bytes |
| 1113 | if (i + eoln_arr.length > buf.length) { |
| 1114 | buf[j++] = buf[i++]; |
| 1115 | continue; |
| 1116 | } |
| 1117 | |
| 1118 | match = true; |
| 1119 | for (int k = 0, l = i; k < eoln_arr.length; k++, l++) { |
| 1120 | if (eoln_arr[k] != buf[l]) { |
| 1121 | match = false; |
| 1122 | break; |
| 1123 | } |
| 1124 | } |
| 1125 | if (match) { |
| 1126 | buf[j++] = '\n'; |
| 1127 | i += eoln_arr.length; |
| 1128 | } else { |
| 1129 | buf[j++] = buf[i++]; |
| 1130 | } |
| 1131 | } |
| 1132 | converted = new String(buf, 0, j); |
| 1133 | } |
| 1134 | |
| 1135 | return converted; |
| 1136 | } |
| 1137 | |
| 1138 | |
| 1139 | /** |
| 1140 | * Primary translation function for translating a Transferable into |
| 1141 | * a byte array, given a source DataFlavor and target format. |
| 1142 | */ |
| 1143 | public byte[] translateTransferable(Transferable contents, |
| 1144 | DataFlavor flavor, |
| 1145 | long format) throws IOException |
| 1146 | { |
| 1147 | // Obtain the transfer data in the source DataFlavor. |
| 1148 | // |
| 1149 | // Note that we special case DataFlavor.plainTextFlavor because |
| 1150 | // StringSelection supports this flavor incorrectly -- instead of |
| 1151 | // returning an InputStream as the DataFlavor representation class |
| 1152 | // states, it returns a Reader. Instead of using this broken |
| 1153 | // functionality, we request the data in stringFlavor (the other |
| 1154 | // DataFlavor which StringSelection supports) and use the String |
| 1155 | // translator. |
| 1156 | Object obj; |
| 1157 | boolean stringSelectionHack; |
| 1158 | try { |
| 1159 | obj = contents.getTransferData(flavor); |
| 1160 | if (obj == null) { |
| 1161 | return null; |
| 1162 | } |
| 1163 | if (flavor.equals(DataFlavor.plainTextFlavor) && |
| 1164 | !(obj instanceof InputStream)) |
| 1165 | { |
| 1166 | obj = contents.getTransferData(DataFlavor.stringFlavor); |
| 1167 | if (obj == null) { |
| 1168 | return null; |
| 1169 | } |
| 1170 | stringSelectionHack = true; |
| 1171 | } else { |
| 1172 | stringSelectionHack = false; |
| 1173 | } |
| 1174 | } catch (UnsupportedFlavorException e) { |
| 1175 | throw new IOException(e.getMessage()); |
| 1176 | } |
| 1177 | |
| 1178 | // Source data is a String. Search-and-replace EOLN. Encode into the |
| 1179 | // target format. Append terminating NUL bytes. |
| 1180 | if (stringSelectionHack || |
| 1181 | (String.class.equals(flavor.getRepresentationClass()) && |
| 1182 | isFlavorCharsetTextType(flavor) && isTextFormat(format))) { |
| 1183 | |
| 1184 | return translateTransferableString( |
| 1185 | (String)obj, |
| 1186 | format); |
| 1187 | |
| 1188 | // Source data is a Reader. Convert to a String and recur. In the |
| 1189 | // future, we may want to rewrite this so that we encode on demand. |
| 1190 | } else if (flavor.isRepresentationClassReader()) { |
| 1191 | if (!(isFlavorCharsetTextType(flavor) && isTextFormat(format))) { |
| 1192 | throw new IOException |
| 1193 | ("cannot transfer non-text data as Reader"); |
| 1194 | } |
| 1195 | |
| 1196 | Reader r = (Reader)obj; |
| 1197 | StringBuffer buf = new StringBuffer(); |
| 1198 | int c; |
| 1199 | while ((c = r.read()) != -1) { |
| 1200 | buf.append((char)c); |
| 1201 | } |
| 1202 | r.close(); |
| 1203 | |
| 1204 | return translateTransferableString( |
| 1205 | buf.toString(), |
| 1206 | format); |
| 1207 | |
| 1208 | // Source data is a CharBuffer. Convert to a String and recur. |
| 1209 | } else if (flavor.isRepresentationClassCharBuffer()) { |
| 1210 | if (!(isFlavorCharsetTextType(flavor) && isTextFormat(format))) { |
| 1211 | throw new IOException |
| 1212 | ("cannot transfer non-text data as CharBuffer"); |
| 1213 | } |
| 1214 | |
| 1215 | CharBuffer buffer = (CharBuffer)obj; |
| 1216 | int size = buffer.remaining(); |
| 1217 | char[] chars = new char[size]; |
| 1218 | buffer.get(chars, 0, size); |
| 1219 | |
| 1220 | return translateTransferableString( |
| 1221 | new String(chars), |
| 1222 | format); |
| 1223 | |
| 1224 | // Source data is a char array. Convert to a String and recur. |
| 1225 | } else if (charArrayClass.equals(flavor.getRepresentationClass())) { |
| 1226 | if (!(isFlavorCharsetTextType(flavor) && isTextFormat(format))) { |
| 1227 | throw new IOException |
| 1228 | ("cannot transfer non-text data as char array"); |
| 1229 | } |
| 1230 | |
| 1231 | return translateTransferableString( |
| 1232 | new String((char[])obj), |
| 1233 | format); |
| 1234 | |
| 1235 | // Source data is a ByteBuffer. For arbitrary flavors, simply return |
| 1236 | // the array. For text flavors, decode back to a String and recur to |
| 1237 | // reencode according to the requested format. |
| 1238 | } else if (flavor.isRepresentationClassByteBuffer()) { |
| 1239 | ByteBuffer buffer = (ByteBuffer)obj; |
| 1240 | int size = buffer.remaining(); |
| 1241 | byte[] bytes = new byte[size]; |
| 1242 | buffer.get(bytes, 0, size); |
| 1243 | |
| 1244 | if (isFlavorCharsetTextType(flavor) && isTextFormat(format)) { |
| 1245 | String sourceEncoding = DataTransferer.getTextCharset(flavor); |
| 1246 | return translateTransferableString( |
| 1247 | new String(bytes, sourceEncoding), |
| 1248 | format); |
| 1249 | } else { |
| 1250 | return bytes; |
| 1251 | } |
| 1252 | |
| 1253 | // Source data is a byte array. For arbitrary flavors, simply return |
| 1254 | // the array. For text flavors, decode back to a String and recur to |
| 1255 | // reencode according to the requested format. |
| 1256 | } else if (byteArrayClass.equals(flavor.getRepresentationClass())) { |
| 1257 | byte[] bytes = (byte[])obj; |
| 1258 | |
| 1259 | if (isFlavorCharsetTextType(flavor) && isTextFormat(format)) { |
| 1260 | String sourceEncoding = DataTransferer.getTextCharset(flavor); |
| 1261 | return translateTransferableString( |
| 1262 | new String(bytes, sourceEncoding), |
| 1263 | format); |
| 1264 | } else { |
| 1265 | return bytes; |
| 1266 | } |
| 1267 | // Source data is Image |
| 1268 | } else if (DataFlavor.imageFlavor.equals(flavor)) { |
| 1269 | if (!isImageFormat(format)) { |
| 1270 | throw new IOException("Data translation failed: " + |
| 1271 | "not an image format"); |
| 1272 | } |
| 1273 | |
| 1274 | Image image = (Image)obj; |
| 1275 | byte[] bytes = imageToPlatformBytes(image, format); |
| 1276 | |
| 1277 | if (bytes == null) { |
| 1278 | throw new IOException("Data translation failed: " + |
| 1279 | "cannot convert java image to native format"); |
| 1280 | } |
| 1281 | return bytes; |
| 1282 | } |
| 1283 | |
| 1284 | ByteArrayOutputStream bos = new ByteArrayOutputStream(); |
| 1285 | |
| 1286 | // Target data is a file list. Source data must be a |
| 1287 | // java.util.List which contains java.io.File or String instances. |
| 1288 | if (isFileFormat(format)) { |
| 1289 | if (!DataFlavor.javaFileListFlavor.equals(flavor)) { |
| 1290 | throw new IOException("data translation failed"); |
| 1291 | } |
| 1292 | final List list = (List)obj; |
| 1293 | int nFiles = 0; |
| 1294 | for (int i = 0; i < list.size(); i++) { |
| 1295 | Object o = list.get(i); |
| 1296 | if (o instanceof File || o instanceof String) { |
| 1297 | nFiles++; |
| 1298 | } |
| 1299 | } |
| 1300 | final String[] files = new String[nFiles]; |
| 1301 | |
| 1302 | try { |
| 1303 | AccessController.doPrivileged(new PrivilegedExceptionAction() { |
| 1304 | public Object run() throws IOException { |
| 1305 | for (int i = 0, j = 0; i < list.size(); i++) { |
| 1306 | Object o = list.get(i); |
| 1307 | if (o instanceof File) { |
| 1308 | files[j++] = ((File)o).getCanonicalPath(); |
| 1309 | } else if (o instanceof String) { |
| 1310 | files[j++] = (String)o; |
| 1311 | } |
| 1312 | } |
| 1313 | return null; |
| 1314 | } |
| 1315 | }); |
| 1316 | } catch (PrivilegedActionException pae) { |
| 1317 | throw new IOException(pae.getMessage()); |
| 1318 | } |
| 1319 | |
| 1320 | for (int i = 0; i < files.length; i++) { |
| 1321 | byte[] bytes = files[i].getBytes(); |
| 1322 | if (i != 0) bos.write(0); |
| 1323 | bos.write(bytes, 0, bytes.length); |
| 1324 | } |
| 1325 | |
| 1326 | // Source data is an InputStream. For arbitrary flavors, just grab the |
| 1327 | // bytes and dump them into a byte array. For text flavors, decode back |
| 1328 | // to a String and recur to reencode according to the requested format. |
| 1329 | } else if (flavor.isRepresentationClassInputStream()) { |
| 1330 | InputStream is = (InputStream)obj; |
| 1331 | boolean eof = false; |
| 1332 | int avail = is.available(); |
| 1333 | byte[] tmp = new byte[avail > 8192 ? avail : 8192]; |
| 1334 | do { |
| 1335 | int ret; |
| 1336 | if (!(eof = (ret = is.read(tmp, 0, tmp.length)) == -1)) { |
| 1337 | bos.write(tmp, 0, ret); |
| 1338 | } |
| 1339 | } while (!eof); |
| 1340 | is.close(); |
| 1341 | |
| 1342 | if (isFlavorCharsetTextType(flavor) && isTextFormat(format)) { |
| 1343 | byte[] bytes = bos.toByteArray(); |
| 1344 | bos.close(); |
| 1345 | String sourceEncoding = DataTransferer.getTextCharset(flavor); |
| 1346 | return translateTransferableString( |
| 1347 | new String(bytes, sourceEncoding), |
| 1348 | format); |
| 1349 | } |
| 1350 | |
| 1351 | // Source data is an RMI object |
| 1352 | } else if (flavor.isRepresentationClassRemote()) { |
| 1353 | MarshalledObject mo = new MarshalledObject(obj); |
| 1354 | ObjectOutputStream oos = new ObjectOutputStream(bos); |
| 1355 | oos.writeObject(mo); |
| 1356 | oos.close(); |
| 1357 | |
| 1358 | // Source data is Serializable |
| 1359 | } else if (flavor.isRepresentationClassSerializable()) { |
| 1360 | ObjectOutputStream oos = new ObjectOutputStream(bos); |
| 1361 | oos.writeObject(obj); |
| 1362 | oos.close(); |
| 1363 | |
| 1364 | } else { |
| 1365 | throw new IOException("data translation failed"); |
| 1366 | } |
| 1367 | |
| 1368 | byte[] ret = bos.toByteArray(); |
| 1369 | bos.close(); |
| 1370 | return ret; |
| 1371 | } |
| 1372 | |
| 1373 | public Object translateBytes(byte[] bytes, DataFlavor flavor, |
| 1374 | long format, Transferable localeTransferable) |
| 1375 | throws IOException |
| 1376 | { |
| 1377 | return translateBytesOrStream(null, bytes, flavor, format, |
| 1378 | localeTransferable); |
| 1379 | } |
| 1380 | |
| 1381 | public Object translateStream(InputStream str, DataFlavor flavor, |
| 1382 | long format, Transferable localeTransferable) |
| 1383 | throws IOException |
| 1384 | { |
| 1385 | return translateBytesOrStream(str, null, flavor, format, |
| 1386 | localeTransferable); |
| 1387 | } |
| 1388 | |
| 1389 | |
| 1390 | /** |
| 1391 | * Primary translation function for translating either a byte array or |
| 1392 | * an InputStream into an Object, given a source format and a target |
| 1393 | * DataFlavor. |
| 1394 | * |
| 1395 | * One of str/bytes is non-null; the other is null. |
| 1396 | * The conversion from byte[] to InputStream is cheap, so do that |
| 1397 | * immediately if necessary. The opposite conversion is expensive, |
| 1398 | * so avoid it if possible. |
| 1399 | */ |
| 1400 | protected Object translateBytesOrStream(InputStream str, byte[] bytes, |
| 1401 | DataFlavor flavor, long format, |
| 1402 | Transferable localeTransferable) |
| 1403 | throws IOException |
| 1404 | { |
| 1405 | |
| 1406 | if (str == null) { |
| 1407 | str = new ByteArrayInputStream(bytes); |
| 1408 | } |
| 1409 | |
| 1410 | // Source data is a file list. Use the dragQueryFile native function to |
| 1411 | // do most of the decoding. Then wrap File objects around the String |
| 1412 | // filenames and return a List. |
| 1413 | if (isFileFormat(format)) { |
| 1414 | if (!DataFlavor.javaFileListFlavor.equals(flavor)) { |
| 1415 | throw new IOException("data translation failed"); |
| 1416 | } |
| 1417 | if (bytes == null) { |
| 1418 | bytes = inputStreamToByteArray(str); |
| 1419 | } |
| 1420 | String[] filenames = dragQueryFile(bytes); |
| 1421 | if (filenames == null) { |
| 1422 | str.close(); |
| 1423 | return null; |
| 1424 | } |
| 1425 | |
| 1426 | // Convert the strings to File objects |
| 1427 | File[] files = new File[filenames.length]; |
| 1428 | for (int i = 0; i < filenames.length; i++) { |
| 1429 | files[i] = new File(filenames[i]); |
| 1430 | } |
| 1431 | str.close(); |
| 1432 | |
| 1433 | // Turn the list of Files into a List and return |
| 1434 | return Arrays.asList(files); |
| 1435 | |
| 1436 | // Target data is a String. Strip terminating NUL bytes. Decode bytes |
| 1437 | // into characters. Search-and-replace EOLN. |
| 1438 | } else if (String.class.equals(flavor.getRepresentationClass()) && |
| 1439 | isFlavorCharsetTextType(flavor) && isTextFormat(format)) { |
| 1440 | |
| 1441 | return translateBytesOrStreamToString( |
| 1442 | str, bytes, |
| 1443 | format, localeTransferable); |
| 1444 | |
| 1445 | // Special hack to maintain backwards-compatibility with the brokenness |
| 1446 | // of StringSelection. Return a StringReader instead of an InputStream. |
| 1447 | // Recur to obtain String and encapsulate. |
| 1448 | } else if (DataFlavor.plainTextFlavor.equals(flavor)) { |
| 1449 | return new StringReader(translateBytesOrStreamToString( |
| 1450 | str, bytes, |
| 1451 | format, localeTransferable)); |
| 1452 | |
| 1453 | // Target data is an InputStream. For arbitrary flavors, just return |
| 1454 | // the raw bytes. For text flavors, decode to strip terminators and |
| 1455 | // search-and-replace EOLN, then reencode according to the requested |
| 1456 | // flavor. |
| 1457 | } else if (flavor.isRepresentationClassInputStream()) { |
| 1458 | return translateBytesOrStreamToInputStream(str, flavor, format, |
| 1459 | localeTransferable); |
| 1460 | |
| 1461 | // Target data is a Reader. Obtain data in InputStream format, encoded |
| 1462 | // as "Unicode" (utf-16be). Then use an InputStreamReader to decode |
| 1463 | // back to chars on demand. |
| 1464 | } else if (flavor.isRepresentationClassReader()) { |
| 1465 | if (!(isFlavorCharsetTextType(flavor) && isTextFormat(format))) { |
| 1466 | throw new IOException |
| 1467 | ("cannot transfer non-text data as Reader"); |
| 1468 | } |
| 1469 | |
| 1470 | InputStream is = (InputStream) |
| 1471 | translateBytesOrStreamToInputStream |
| 1472 | (str, DataFlavor.plainTextFlavor, format, |
| 1473 | localeTransferable); |
| 1474 | String unicode = |
| 1475 | DataTransferer.getTextCharset(DataFlavor.plainTextFlavor); |
| 1476 | Reader reader = new InputStreamReader(is, unicode); |
| 1477 | |
| 1478 | return constructFlavoredObject(reader, flavor, Reader.class); |
| 1479 | |
| 1480 | // Target data is a CharBuffer. Recur to obtain String and wrap. |
| 1481 | } else if (flavor.isRepresentationClassCharBuffer()) { |
| 1482 | if (!(isFlavorCharsetTextType(flavor) && isTextFormat(format))) { |
| 1483 | throw new IOException |
| 1484 | ("cannot transfer non-text data as CharBuffer"); |
| 1485 | } |
| 1486 | |
| 1487 | CharBuffer buffer = CharBuffer.wrap(translateBytesOrStreamToString( |
| 1488 | str, bytes, |
| 1489 | format, localeTransferable)); |
| 1490 | |
| 1491 | return constructFlavoredObject(buffer, flavor, CharBuffer.class); |
| 1492 | |
| 1493 | // Target data is a char array. Recur to obtain String and convert to |
| 1494 | // char array. |
| 1495 | } else if (charArrayClass.equals(flavor.getRepresentationClass())) { |
| 1496 | if (!(isFlavorCharsetTextType(flavor) && isTextFormat(format))) { |
| 1497 | throw new IOException |
| 1498 | ("cannot transfer non-text data as char array"); |
| 1499 | } |
| 1500 | |
| 1501 | return translateBytesOrStreamToString( |
| 1502 | str, bytes, |
| 1503 | format, localeTransferable).toCharArray(); |
| 1504 | |
| 1505 | // Target data is a ByteBuffer. For arbitrary flavors, just return |
| 1506 | // the raw bytes. For text flavors, convert to a String to strip |
| 1507 | // terminators and search-and-replace EOLN, then reencode according to |
| 1508 | // the requested flavor. |
| 1509 | } else if (flavor.isRepresentationClassByteBuffer()) { |
| 1510 | if (isFlavorCharsetTextType(flavor) && isTextFormat(format)) { |
| 1511 | bytes = translateBytesOrStreamToString( |
| 1512 | str, bytes, |
| 1513 | format, localeTransferable |
| 1514 | ).getBytes( |
| 1515 | DataTransferer.getTextCharset(flavor) |
| 1516 | ); |
| 1517 | } else { |
| 1518 | if (bytes == null) { |
| 1519 | bytes = inputStreamToByteArray(str); |
| 1520 | } |
| 1521 | } |
| 1522 | |
| 1523 | ByteBuffer buffer = ByteBuffer.wrap(bytes); |
| 1524 | return constructFlavoredObject(buffer, flavor, ByteBuffer.class); |
| 1525 | |
| 1526 | // Target data is a byte array. For arbitrary flavors, just return |
| 1527 | // the raw bytes. For text flavors, convert to a String to strip |
| 1528 | // terminators and search-and-replace EOLN, then reencode according to |
| 1529 | // the requested flavor. |
| 1530 | } else if (byteArrayClass.equals(flavor.getRepresentationClass())) { |
| 1531 | if (isFlavorCharsetTextType(flavor) && isTextFormat(format)) { |
| 1532 | return translateBytesOrStreamToString( |
| 1533 | str, bytes, |
| 1534 | format, localeTransferable |
| 1535 | ).getBytes( |
| 1536 | DataTransferer.getTextCharset(flavor) |
| 1537 | ); |
| 1538 | } else { |
| 1539 | return (bytes != null) ? bytes : inputStreamToByteArray(str); |
| 1540 | } |
| 1541 | |
| 1542 | // Target data is an RMI object |
| 1543 | } else if (flavor.isRepresentationClassRemote()) { |
| 1544 | try { |
| 1545 | byte[] ba = inputStreamToByteArray(str); |
| 1546 | ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(ba)); |
| 1547 | Object ret = ((MarshalledObject)(ois.readObject())).get(); |
| 1548 | ois.close(); |
| 1549 | str.close(); |
| 1550 | return ret; |
| 1551 | } catch (Exception e) { |
| 1552 | throw new IOException(e.getMessage()); |
| 1553 | } |
| 1554 | |
| 1555 | // Target data is Serializable |
| 1556 | } else if (flavor.isRepresentationClassSerializable()) { |
| 1557 | try { |
| 1558 | byte[] ba = inputStreamToByteArray(str); |
| 1559 | ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(ba)); |
| 1560 | Object ret = ois.readObject(); |
| 1561 | ois.close(); |
| 1562 | str.close(); |
| 1563 | return ret; |
| 1564 | } catch (Exception e) { |
| 1565 | throw new IOException(e.getMessage()); |
| 1566 | } |
| 1567 | |
| 1568 | // Target data is Image |
| 1569 | } else if (DataFlavor.imageFlavor.equals(flavor)) { |
| 1570 | if (!isImageFormat(format)) { |
| 1571 | throw new IOException("data translation failed"); |
| 1572 | } |
| 1573 | |
| 1574 | Image image = platformImageBytesOrStreamToImage(str, bytes, format); |
| 1575 | str.close(); |
| 1576 | return image; |
| 1577 | } |
| 1578 | |
| 1579 | throw new IOException("data translation failed"); |
| 1580 | } |
| 1581 | |
| 1582 | /** |
| 1583 | * For arbitrary flavors, just use the raw InputStream. For text flavors, |
| 1584 | * ReencodingInputStream will decode and reencode the InputStream on demand |
| 1585 | * so that we can strip terminators and search-and-replace EOLN. |
| 1586 | */ |
| 1587 | private Object translateBytesOrStreamToInputStream |
| 1588 | (InputStream str, DataFlavor flavor, long format, |
| 1589 | Transferable localeTransferable) throws IOException |
| 1590 | { |
| 1591 | if (isFlavorCharsetTextType(flavor) && isTextFormat(format)) { |
| 1592 | str = new ReencodingInputStream |
| 1593 | (str, format, DataTransferer.getTextCharset(flavor), |
| 1594 | localeTransferable); |
| 1595 | } |
| 1596 | |
| 1597 | return constructFlavoredObject(str, flavor, InputStream.class); |
| 1598 | } |
| 1599 | |
| 1600 | /** |
| 1601 | * We support representations which are exactly of the specified Class, |
| 1602 | * and also arbitrary Objects which have a constructor which takes an |
| 1603 | * instance of the Class as its sole parameter. |
| 1604 | */ |
| 1605 | private Object constructFlavoredObject(Object arg, DataFlavor flavor, |
| 1606 | Class clazz) |
| 1607 | throws IOException |
| 1608 | { |
| 1609 | final Class dfrc = flavor.getRepresentationClass(); |
| 1610 | |
| 1611 | if (clazz.equals(dfrc)) { |
| 1612 | return arg; // simple case |
| 1613 | } else { |
| 1614 | Constructor[] constructors = null; |
| 1615 | |
| 1616 | try { |
| 1617 | constructors = (Constructor[]) |
| 1618 | AccessController.doPrivileged(new PrivilegedAction() { |
| 1619 | public Object run() { |
| 1620 | return dfrc.getConstructors(); |
| 1621 | } |
| 1622 | }); |
| 1623 | } catch (SecurityException se) { |
| 1624 | throw new IOException(se.getMessage()); |
| 1625 | } |
| 1626 | |
| 1627 | Constructor constructor = null; |
| 1628 | |
| 1629 | for (int j = 0; j < constructors.length; j++) { |
| 1630 | if (!Modifier.isPublic(constructors[j].getModifiers())) { |
| 1631 | continue; |
| 1632 | } |
| 1633 | |
| 1634 | Class[] ptypes = constructors[j].getParameterTypes(); |
| 1635 | |
| 1636 | if (ptypes != null && ptypes.length == 1 && |
| 1637 | clazz.equals(ptypes[0])) { |
| 1638 | constructor = constructors[j]; |
| 1639 | break; |
| 1640 | } |
| 1641 | } |
| 1642 | |
| 1643 | if (constructor == null) { |
| 1644 | throw new IOException("can't find <init>(L"+ clazz + |
| 1645 | ";)V for class: " + dfrc.getName()); |
| 1646 | } |
| 1647 | |
| 1648 | try { |
| 1649 | return constructor.newInstance(new Object[] { arg } ); |
| 1650 | } catch (Exception e) { |
| 1651 | throw new IOException(e.getMessage()); |
| 1652 | } |
| 1653 | } |
| 1654 | } |
| 1655 | |
| 1656 | /** |
| 1657 | * Used for decoding and reencoding an InputStream on demand so that we |
| 1658 | * can strip NUL terminators and perform EOLN search-and-replace. |
| 1659 | */ |
| 1660 | public class ReencodingInputStream extends InputStream { |
| 1661 | protected BufferedReader wrapped; |
| 1662 | protected final char[] in = new char[1]; |
| 1663 | protected byte[] out; |
| 1664 | |
| 1665 | protected CharsetEncoder encoder; |
| 1666 | protected CharBuffer inBuf; |
| 1667 | protected ByteBuffer outBuf; |
| 1668 | |
| 1669 | protected char[] eoln; |
| 1670 | protected int numTerminators; |
| 1671 | |
| 1672 | protected boolean eos; |
| 1673 | protected int index, limit; |
| 1674 | |
| 1675 | public ReencodingInputStream(InputStream bytestream, long format, |
| 1676 | String targetEncoding, |
| 1677 | Transferable localeTransferable) |
| 1678 | throws IOException |
| 1679 | { |
| 1680 | Long lFormat = Long.valueOf(format); |
| 1681 | |
| 1682 | String sourceEncoding = null; |
| 1683 | if (isLocaleDependentTextFormat(format) && |
| 1684 | localeTransferable != null && |
| 1685 | localeTransferable. |
| 1686 | isDataFlavorSupported(javaTextEncodingFlavor)) |
| 1687 | { |
| 1688 | try { |
| 1689 | sourceEncoding = new String((byte[])localeTransferable. |
| 1690 | getTransferData(javaTextEncodingFlavor), |
| 1691 | "UTF-8"); |
| 1692 | } catch (UnsupportedFlavorException cannotHappen) { |
| 1693 | } |
| 1694 | } else { |
| 1695 | sourceEncoding = getCharsetForTextFormat(lFormat); |
| 1696 | } |
| 1697 | |
| 1698 | if (sourceEncoding == null) { |
| 1699 | // Only happens when we have a custom text type. |
| 1700 | sourceEncoding = getDefaultTextCharset(); |
| 1701 | } |
| 1702 | wrapped = new BufferedReader |
| 1703 | (new InputStreamReader(bytestream, sourceEncoding)); |
| 1704 | |
| 1705 | if (targetEncoding == null) { |
| 1706 | // Throw NullPointerException for compatibility with the former |
| 1707 | // call to sun.io.CharToByteConverter.getConverter(null) |
| 1708 | // (Charset.forName(null) throws unspecified IllegalArgumentException |
| 1709 | // now; see 6228568) |
| 1710 | throw new NullPointerException("null target encoding"); |
| 1711 | } |
| 1712 | |
| 1713 | try { |
| 1714 | encoder = Charset.forName(targetEncoding).newEncoder(); |
| 1715 | out = new byte[(int)(encoder.maxBytesPerChar() + 0.5)]; |
| 1716 | inBuf = CharBuffer.wrap(in); |
| 1717 | outBuf = ByteBuffer.wrap(out); |
| 1718 | } catch (IllegalCharsetNameException e) { |
| 1719 | throw new IOException(e.toString()); |
| 1720 | } catch (UnsupportedCharsetException e) { |
| 1721 | throw new IOException(e.toString()); |
| 1722 | } catch (UnsupportedOperationException e) { |
| 1723 | throw new IOException(e.toString()); |
| 1724 | } |
| 1725 | |
| 1726 | String sEoln = (String)nativeEOLNs.get(lFormat); |
| 1727 | if (sEoln != null) { |
| 1728 | eoln = sEoln.toCharArray(); |
| 1729 | } |
| 1730 | |
| 1731 | // A hope and a prayer that this works generically. This will |
| 1732 | // definitely work on Win32. |
| 1733 | Integer terminators = (Integer)nativeTerminators.get(lFormat); |
| 1734 | if (terminators != null) { |
| 1735 | numTerminators = terminators.intValue(); |
| 1736 | } |
| 1737 | } |
| 1738 | |
| 1739 | public int read() throws IOException { |
| 1740 | if (eos) { |
| 1741 | return -1; |
| 1742 | } |
| 1743 | |
| 1744 | if (index >= limit) { |
| 1745 | int c = wrapped.read(); |
| 1746 | |
| 1747 | if (c == -1) { // -1 is EOS |
| 1748 | eos = true; |
| 1749 | return -1; |
| 1750 | } |
| 1751 | |
| 1752 | // "c == 0" is not quite correct, but good enough on Windows. |
| 1753 | if (numTerminators > 0 && c == 0) { |
| 1754 | eos = true; |
| 1755 | return -1; |
| 1756 | } else if (eoln != null && matchCharArray(eoln, c)) { |
| 1757 | c = '\n' & 0xFFFF; |
| 1758 | } |
| 1759 | |
| 1760 | in[0] = (char)c; |
| 1761 | |
| 1762 | inBuf.rewind(); |
| 1763 | outBuf.rewind(); |
| 1764 | encoder.encode(inBuf, outBuf, false); |
| 1765 | outBuf.flip(); |
| 1766 | limit = outBuf.limit(); |
| 1767 | |
| 1768 | index = 0; |
| 1769 | |
| 1770 | return read(); |
| 1771 | } else { |
| 1772 | return out[index++] & 0xFF; |
| 1773 | } |
| 1774 | } |
| 1775 | |
| 1776 | public int available() throws IOException { |
| 1777 | return ((eos) ? 0 : (limit - index)); |
| 1778 | } |
| 1779 | |
| 1780 | public void close() throws IOException { |
| 1781 | wrapped.close(); |
| 1782 | } |
| 1783 | |
| 1784 | /** |
| 1785 | * Checks to see if the next array.length characters in wrapped |
| 1786 | * match array. The first character is provided as c. Subsequent |
| 1787 | * characters are read from wrapped itself. When this method returns, |
| 1788 | * the wrapped index may be different from what it was when this |
| 1789 | * method was called. |
| 1790 | */ |
| 1791 | private boolean matchCharArray(char[] array, int c) |
| 1792 | throws IOException |
| 1793 | { |
| 1794 | wrapped.mark(array.length); // BufferedReader supports mark |
| 1795 | |
| 1796 | int count = 0; |
| 1797 | if ((char)c == array[0]) { |
| 1798 | for (count = 1; count < array.length; count++) { |
| 1799 | c = wrapped.read(); |
| 1800 | if (c == -1 || ((char)c) != array[count]) { |
| 1801 | break; |
| 1802 | } |
| 1803 | } |
| 1804 | } |
| 1805 | |
| 1806 | if (count == array.length) { |
| 1807 | return true; |
| 1808 | } else { |
| 1809 | wrapped.reset(); |
| 1810 | return false; |
| 1811 | } |
| 1812 | } |
| 1813 | } |
| 1814 | |
| 1815 | /** |
| 1816 | * Decodes a byte array into a set of String filenames. |
| 1817 | */ |
| 1818 | protected abstract String[] dragQueryFile(byte[] bytes); |
| 1819 | |
| 1820 | /** |
| 1821 | * Translates either a byte array or an input stream which contain |
| 1822 | * platform-specific image data in the given format into an Image. |
| 1823 | */ |
| 1824 | protected abstract Image platformImageBytesOrStreamToImage(InputStream str, |
| 1825 | byte[] bytes, |
| 1826 | long format) |
| 1827 | throws IOException; |
| 1828 | |
| 1829 | /** |
| 1830 | * Translates either a byte array or an input stream which contain |
| 1831 | * an image data in the given standard format into an Image. |
| 1832 | * |
| 1833 | * @param mimeType image MIME type, such as: image/png, image/jpeg, image/gif |
| 1834 | */ |
| 1835 | protected Image standardImageBytesOrStreamToImage(InputStream inputStream, |
| 1836 | byte[] bytes, |
| 1837 | String mimeType) |
| 1838 | throws IOException { |
| 1839 | if (inputStream == null) { |
| 1840 | inputStream = new ByteArrayInputStream(bytes); |
| 1841 | } |
| 1842 | |
| 1843 | Iterator readerIterator = ImageIO.getImageReadersByMIMEType(mimeType); |
| 1844 | |
| 1845 | if (!readerIterator.hasNext()) { |
| 1846 | throw new IOException("No registered service provider can decode " + |
| 1847 | " an image from " + mimeType); |
| 1848 | } |
| 1849 | |
| 1850 | IOException ioe = null; |
| 1851 | |
| 1852 | while (readerIterator.hasNext()) { |
| 1853 | ImageReader imageReader = (ImageReader)readerIterator.next(); |
| 1854 | try { |
| 1855 | ImageInputStream imageInputStream = |
| 1856 | ImageIO.createImageInputStream(inputStream); |
| 1857 | |
| 1858 | try { |
| 1859 | ImageReadParam param = imageReader.getDefaultReadParam(); |
| 1860 | imageReader.setInput(imageInputStream, true, true); |
| 1861 | BufferedImage bufferedImage = |
| 1862 | imageReader.read(imageReader.getMinIndex(), param); |
| 1863 | if (bufferedImage != null) { |
| 1864 | return bufferedImage; |
| 1865 | } |
| 1866 | } finally { |
| 1867 | imageInputStream.close(); |
| 1868 | imageReader.dispose(); |
| 1869 | } |
| 1870 | } catch (IOException e) { |
| 1871 | ioe = e; |
| 1872 | continue; |
| 1873 | } |
| 1874 | } |
| 1875 | |
| 1876 | if (ioe == null) { |
| 1877 | ioe = new IOException("Registered service providers failed to decode" |
| 1878 | + " an image from " + mimeType); |
| 1879 | } |
| 1880 | |
| 1881 | throw ioe; |
| 1882 | } |
| 1883 | |
| 1884 | /** |
| 1885 | * Translates a Java Image into a byte array which contains platform- |
| 1886 | * specific image data in the given format. |
| 1887 | */ |
| 1888 | protected abstract byte[] imageToPlatformBytes(Image image, long format) |
| 1889 | throws IOException; |
| 1890 | |
| 1891 | /** |
| 1892 | * Translates a Java Image into a byte array which contains |
| 1893 | * an image data in the given standard format. |
| 1894 | * |
| 1895 | * @param mimeType image MIME type, such as: image/png, image/jpeg |
| 1896 | */ |
| 1897 | protected byte[] imageToStandardBytes(Image image, String mimeType) |
| 1898 | throws IOException { |
| 1899 | IOException originalIOE = null; |
| 1900 | |
| 1901 | Iterator writerIterator = ImageIO.getImageWritersByMIMEType(mimeType); |
| 1902 | |
| 1903 | if (!writerIterator.hasNext()) { |
| 1904 | throw new IOException("No registered service provider can encode " + |
| 1905 | " an image to " + mimeType); |
| 1906 | } |
| 1907 | |
| 1908 | if (image instanceof RenderedImage) { |
| 1909 | // Try to encode the original image. |
| 1910 | try { |
| 1911 | return imageToStandardBytesImpl((RenderedImage)image, mimeType); |
| 1912 | } catch (IOException ioe) { |
| 1913 | originalIOE = ioe; |
| 1914 | } |
| 1915 | } |
| 1916 | |
| 1917 | // Retry with a BufferedImage. |
| 1918 | int width = 0; |
| 1919 | int height = 0; |
| 1920 | if (image instanceof ToolkitImage) { |
| 1921 | ImageRepresentation ir = ((ToolkitImage)image).getImageRep(); |
| 1922 | ir.reconstruct(ImageObserver.ALLBITS); |
| 1923 | width = ir.getWidth(); |
| 1924 | height = ir.getHeight(); |
| 1925 | } else { |
| 1926 | width = image.getWidth(null); |
| 1927 | height = image.getHeight(null); |
| 1928 | } |
| 1929 | |
| 1930 | ColorModel model = ColorModel.getRGBdefault(); |
| 1931 | WritableRaster raster = |
| 1932 | model.createCompatibleWritableRaster(width, height); |
| 1933 | |
| 1934 | BufferedImage bufferedImage = |
| 1935 | new BufferedImage(model, raster, model.isAlphaPremultiplied(), |
| 1936 | null); |
| 1937 | |
| 1938 | Graphics g = bufferedImage.getGraphics(); |
| 1939 | try { |
| 1940 | g.drawImage(image, 0, 0, width, height, null); |
| 1941 | } finally { |
| 1942 | g.dispose(); |
| 1943 | } |
| 1944 | |
| 1945 | try { |
| 1946 | return imageToStandardBytesImpl(bufferedImage, mimeType); |
| 1947 | } catch (IOException ioe) { |
| 1948 | if (originalIOE != null) { |
| 1949 | throw originalIOE; |
| 1950 | } else { |
| 1951 | throw ioe; |
| 1952 | } |
| 1953 | } |
| 1954 | } |
| 1955 | |
| 1956 | protected byte[] imageToStandardBytesImpl(RenderedImage renderedImage, |
| 1957 | String mimeType) |
| 1958 | throws IOException { |
| 1959 | |
| 1960 | Iterator writerIterator = ImageIO.getImageWritersByMIMEType(mimeType); |
| 1961 | |
| 1962 | ImageTypeSpecifier typeSpecifier = |
| 1963 | new ImageTypeSpecifier(renderedImage); |
| 1964 | |
| 1965 | ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| 1966 | IOException ioe = null; |
| 1967 | |
| 1968 | while (writerIterator.hasNext()) { |
| 1969 | ImageWriter imageWriter = (ImageWriter)writerIterator.next(); |
| 1970 | ImageWriterSpi writerSpi = imageWriter.getOriginatingProvider(); |
| 1971 | |
| 1972 | if (!writerSpi.canEncodeImage(typeSpecifier)) { |
| 1973 | continue; |
| 1974 | } |
| 1975 | |
| 1976 | try { |
| 1977 | ImageOutputStream imageOutputStream = |
| 1978 | ImageIO.createImageOutputStream(baos); |
| 1979 | try { |
| 1980 | imageWriter.setOutput(imageOutputStream); |
| 1981 | imageWriter.write(renderedImage); |
| 1982 | imageOutputStream.flush(); |
| 1983 | } finally { |
| 1984 | imageOutputStream.close(); |
| 1985 | } |
| 1986 | } catch (IOException e) { |
| 1987 | imageWriter.dispose(); |
| 1988 | baos.reset(); |
| 1989 | ioe = e; |
| 1990 | continue; |
| 1991 | } |
| 1992 | |
| 1993 | imageWriter.dispose(); |
| 1994 | baos.close(); |
| 1995 | return baos.toByteArray(); |
| 1996 | } |
| 1997 | |
| 1998 | baos.close(); |
| 1999 | |
| 2000 | if (ioe == null) { |
| 2001 | ioe = new IOException("Registered service providers failed to encode " |
| 2002 | + renderedImage + " to " + mimeType); |
| 2003 | } |
| 2004 | |
| 2005 | throw ioe; |
| 2006 | } |
| 2007 | |
| 2008 | /** |
| 2009 | * Concatenates the data represented by two objects. Objects can be either |
| 2010 | * byte arrays or instances of <code>InputStream</code>. If both arguments |
| 2011 | * are byte arrays byte array will be returned. Otherwise an |
| 2012 | * <code>InputStream</code> will be returned. |
| 2013 | * <p> |
| 2014 | * Currently is only called from native code to prepend palette data to |
| 2015 | * platform-specific image data during image transfer on Win32. |
| 2016 | * |
| 2017 | * @param obj1 the first object to be concatenated. |
| 2018 | * @param obj2 the second object to be concatenated. |
| 2019 | * @return a byte array or an <code>InputStream</code> which represents |
| 2020 | * a logical concatenation of the two arguments. |
| 2021 | * @throws NullPointerException is either of the arguments is |
| 2022 | * <code>null</code> |
| 2023 | * @throws ClassCastException is either of the arguments is |
| 2024 | * neither byte array nor an instance of <code>InputStream</code>. |
| 2025 | */ |
| 2026 | private Object concatData(Object obj1, Object obj2) { |
| 2027 | InputStream str1 = null; |
| 2028 | InputStream str2 = null; |
| 2029 | |
| 2030 | if (obj1 instanceof byte[]) { |
| 2031 | byte[] arr1 = (byte[])obj1; |
| 2032 | if (obj2 instanceof byte[]) { |
| 2033 | byte[] arr2 = (byte[])obj2; |
| 2034 | byte[] ret = new byte[arr1.length + arr2.length]; |
| 2035 | System.arraycopy(arr1, 0, ret, 0, arr1.length); |
| 2036 | System.arraycopy(arr2, 0, ret, arr1.length, arr2.length); |
| 2037 | return ret; |
| 2038 | } else { |
| 2039 | str1 = new ByteArrayInputStream(arr1); |
| 2040 | str2 = (InputStream)obj2; |
| 2041 | } |
| 2042 | } else { |
| 2043 | str1 = (InputStream)obj1; |
| 2044 | if (obj2 instanceof byte[]) { |
| 2045 | str2 = new ByteArrayInputStream((byte[])obj2); |
| 2046 | } else { |
| 2047 | str2 = (InputStream)obj2; |
| 2048 | } |
| 2049 | } |
| 2050 | |
| 2051 | return new SequenceInputStream(str1, str2); |
| 2052 | } |
| 2053 | |
| 2054 | public byte[] convertData(final Object source, |
| 2055 | final Transferable contents, |
| 2056 | final long format, |
| 2057 | final Map formatMap, |
| 2058 | final boolean isToolkitThread) |
| 2059 | throws IOException |
| 2060 | { |
| 2061 | byte[] ret = null; |
| 2062 | |
| 2063 | /* |
| 2064 | * If the current thread is the Toolkit thread we should post a |
| 2065 | * Runnable to the event dispatch thread associated with source Object, |
| 2066 | * since translateTransferable() calls Transferable.getTransferData() |
| 2067 | * that may contain client code. |
| 2068 | */ |
| 2069 | if (isToolkitThread) try { |
| 2070 | final Stack stack = new Stack(); |
| 2071 | final Runnable dataConverter = new Runnable() { |
| 2072 | // Guard against multiple executions. |
| 2073 | private boolean done = false; |
| 2074 | public void run() { |
| 2075 | if (done) { |
| 2076 | return; |
| 2077 | } |
| 2078 | byte[] data = null; |
| 2079 | try { |
| 2080 | DataFlavor flavor = (DataFlavor)formatMap.get(Long.valueOf(format)); |
| 2081 | if (flavor != null) { |
| 2082 | data = translateTransferable(contents, flavor, format); |
| 2083 | } |
| 2084 | } catch (Exception e) { |
| 2085 | e.printStackTrace(); |
| 2086 | data = null; |
| 2087 | } |
| 2088 | try { |
| 2089 | getToolkitThreadBlockedHandler().lock(); |
| 2090 | stack.push(data); |
| 2091 | getToolkitThreadBlockedHandler().exit(); |
| 2092 | } finally { |
| 2093 | getToolkitThreadBlockedHandler().unlock(); |
| 2094 | done = true; |
| 2095 | } |
| 2096 | } |
| 2097 | }; |
| 2098 | |
| 2099 | final AppContext appContext = SunToolkit.targetToAppContext(source); |
| 2100 | |
| 2101 | getToolkitThreadBlockedHandler().lock(); |
| 2102 | |
| 2103 | if (appContext != null) { |
| 2104 | appContext.put(DATA_CONVERTER_KEY, dataConverter); |
| 2105 | } |
| 2106 | |
| 2107 | SunToolkit.executeOnEventHandlerThread(source, dataConverter); |
| 2108 | |
| 2109 | while (stack.empty()) { |
| 2110 | getToolkitThreadBlockedHandler().enter(); |
| 2111 | } |
| 2112 | |
| 2113 | if (appContext != null) { |
| 2114 | appContext.remove(DATA_CONVERTER_KEY); |
| 2115 | } |
| 2116 | |
| 2117 | ret = (byte[])stack.pop(); |
| 2118 | } finally { |
| 2119 | getToolkitThreadBlockedHandler().unlock(); |
| 2120 | } else { |
| 2121 | DataFlavor flavor = (DataFlavor) |
| 2122 | formatMap.get(Long.valueOf(format)); |
| 2123 | if (flavor != null) { |
| 2124 | ret = translateTransferable(contents, flavor, format); |
| 2125 | } |
| 2126 | } |
| 2127 | |
| 2128 | return ret; |
| 2129 | } |
| 2130 | |
| 2131 | public void processDataConversionRequests() { |
| 2132 | if (EventQueue.isDispatchThread()) { |
| 2133 | AppContext appContext = AppContext.getAppContext(); |
| 2134 | getToolkitThreadBlockedHandler().lock(); |
| 2135 | try { |
| 2136 | Runnable dataConverter = |
| 2137 | (Runnable)appContext.get(DATA_CONVERTER_KEY); |
| 2138 | if (dataConverter != null) { |
| 2139 | dataConverter.run(); |
| 2140 | appContext.remove(DATA_CONVERTER_KEY); |
| 2141 | } |
| 2142 | } finally { |
| 2143 | getToolkitThreadBlockedHandler().unlock(); |
| 2144 | } |
| 2145 | } |
| 2146 | } |
| 2147 | |
| 2148 | public abstract ToolkitThreadBlockedHandler |
| 2149 | getToolkitThreadBlockedHandler(); |
| 2150 | |
| 2151 | /** |
| 2152 | * Helper function to reduce a Map with Long keys to a long array. |
| 2153 | * <p> |
| 2154 | * The map keys are sorted according to the native formats preference |
| 2155 | * order. |
| 2156 | */ |
| 2157 | public static long[] keysToLongArray(SortedMap map) { |
| 2158 | Set keySet = map.keySet(); |
| 2159 | long[] retval = new long[keySet.size()]; |
| 2160 | int i = 0; |
| 2161 | for (Iterator iter = keySet.iterator(); iter.hasNext(); i++) { |
| 2162 | retval[i] = ((Long)iter.next()).longValue(); |
| 2163 | } |
| 2164 | return retval; |
| 2165 | } |
| 2166 | |
| 2167 | /** |
| 2168 | * Helper function to reduce a Map with DataFlavor keys to a DataFlavor |
| 2169 | * array. The array will be sorted according to |
| 2170 | * <code>DataFlavorComparator</code>. |
| 2171 | */ |
| 2172 | public static DataFlavor[] keysToDataFlavorArray(Map map) { |
| 2173 | return setToSortedDataFlavorArray(map.keySet(), map); |
| 2174 | } |
| 2175 | |
| 2176 | /** |
| 2177 | * Helper function to convert a Set of DataFlavors to a sorted array. |
| 2178 | * The array will be sorted according to <code>DataFlavorComparator</code>. |
| 2179 | */ |
| 2180 | public static DataFlavor[] setToSortedDataFlavorArray(Set flavorsSet) { |
| 2181 | DataFlavor[] flavors = new DataFlavor[flavorsSet.size()]; |
| 2182 | flavorsSet.toArray(flavors); |
| 2183 | Arrays.sort(flavors, defaultFlavorComparator); |
| 2184 | return flavors; |
| 2185 | } |
| 2186 | |
| 2187 | /** |
| 2188 | * Helper function to convert a Set of DataFlavors to a sorted array. |
| 2189 | * The array will be sorted according to a |
| 2190 | * <code>DataFlavorComparator</code> created with the specified |
| 2191 | * flavor-to-native map as an argument. |
| 2192 | */ |
| 2193 | public static DataFlavor[] setToSortedDataFlavorArray |
| 2194 | (Set flavorsSet, Map flavorToNativeMap) |
| 2195 | { |
| 2196 | DataFlavor[] flavors = new DataFlavor[flavorsSet.size()]; |
| 2197 | flavorsSet.toArray(flavors); |
| 2198 | Comparator comparator = |
| 2199 | new DataFlavorComparator(flavorToNativeMap, |
| 2200 | IndexedComparator.SELECT_WORST); |
| 2201 | Arrays.sort(flavors, comparator); |
| 2202 | return flavors; |
| 2203 | } |
| 2204 | |
| 2205 | /** |
| 2206 | * Helper function to convert an InputStream to a byte[] array. |
| 2207 | */ |
| 2208 | protected static byte[] inputStreamToByteArray(InputStream str) |
| 2209 | throws IOException |
| 2210 | { |
| 2211 | ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| 2212 | int len = 0; |
| 2213 | byte[] buf = new byte[8192]; |
| 2214 | |
| 2215 | while ((len = str.read(buf)) != -1) { |
| 2216 | baos.write(buf, 0, len); |
| 2217 | } |
| 2218 | |
| 2219 | return baos.toByteArray(); |
| 2220 | } |
| 2221 | |
| 2222 | /** |
| 2223 | * Returns platform-specific mappings for the specified native. |
| 2224 | * If there are no platform-specific mappings for this native, the method |
| 2225 | * returns an empty <code>List</code>. |
| 2226 | */ |
| 2227 | public List getPlatformMappingsForNative(String nat) { |
| 2228 | return new ArrayList(); |
| 2229 | } |
| 2230 | |
| 2231 | /** |
| 2232 | * Returns platform-specific mappings for the specified flavor. |
| 2233 | * If there are no platform-specific mappings for this flavor, the method |
| 2234 | * returns an empty <code>List</code>. |
| 2235 | */ |
| 2236 | public List getPlatformMappingsForFlavor(DataFlavor df) { |
| 2237 | return new ArrayList(); |
| 2238 | } |
| 2239 | |
| 2240 | private static CharsetComparator defaultCharsetComparator = |
| 2241 | new CharsetComparator(IndexedComparator.SELECT_WORST); |
| 2242 | private static DataFlavorComparator defaultFlavorComparator = |
| 2243 | new DataFlavorComparator(IndexedComparator.SELECT_WORST); |
| 2244 | |
| 2245 | /** |
| 2246 | * A Comparator which includes a helper function for comparing two Objects |
| 2247 | * which are likely to be keys in the specified Map. |
| 2248 | */ |
| 2249 | public abstract static class IndexedComparator implements Comparator { |
| 2250 | |
| 2251 | /** |
| 2252 | * The best Object (e.g., DataFlavor) will be the last in sequence. |
| 2253 | */ |
| 2254 | public static final boolean SELECT_BEST = true; |
| 2255 | |
| 2256 | /** |
| 2257 | * The best Object (e.g., DataFlavor) will be the first in sequence. |
| 2258 | */ |
| 2259 | public static final boolean SELECT_WORST = false; |
| 2260 | |
| 2261 | protected final boolean order; |
| 2262 | |
| 2263 | public IndexedComparator() { |
| 2264 | this(SELECT_BEST); |
| 2265 | } |
| 2266 | |
| 2267 | public IndexedComparator(boolean order) { |
| 2268 | this.order = order; |
| 2269 | } |
| 2270 | |
| 2271 | /** |
| 2272 | * Helper method to compare two objects by their Integer indices in the |
| 2273 | * given map. If the map doesn't contain an entry for either of the |
| 2274 | * objects, the fallback index will be used for the object instead. |
| 2275 | * |
| 2276 | * @param indexMap the map which maps objects into Integer indexes. |
| 2277 | * @param obj1 the first object to be compared. |
| 2278 | * @param obj2 the second object to be compared. |
| 2279 | * @param fallbackIndex the Integer to be used as a fallback index. |
| 2280 | * @return a negative integer, zero, or a positive integer as the |
| 2281 | * first object is mapped to a less, equal to, or greater |
| 2282 | * index than the second. |
| 2283 | */ |
| 2284 | protected static int compareIndices(Map indexMap, |
| 2285 | Object obj1, Object obj2, |
| 2286 | Integer fallbackIndex) { |
| 2287 | Integer index1 = (Integer)indexMap.get(obj1); |
| 2288 | Integer index2 = (Integer)indexMap.get(obj2); |
| 2289 | |
| 2290 | if (index1 == null) { |
| 2291 | index1 = fallbackIndex; |
| 2292 | } |
| 2293 | if (index2 == null) { |
| 2294 | index2 = fallbackIndex; |
| 2295 | } |
| 2296 | |
| 2297 | return index1.compareTo(index2); |
| 2298 | } |
| 2299 | |
| 2300 | /** |
| 2301 | * Helper method to compare two objects by their Long indices in the |
| 2302 | * given map. If the map doesn't contain an entry for either of the |
| 2303 | * objects, the fallback index will be used for the object instead. |
| 2304 | * |
| 2305 | * @param indexMap the map which maps objects into Long indexes. |
| 2306 | * @param obj1 the first object to be compared. |
| 2307 | * @param obj2 the second object to be compared. |
| 2308 | * @param fallbackIndex the Long to be used as a fallback index. |
| 2309 | * @return a negative integer, zero, or a positive integer as the |
| 2310 | * first object is mapped to a less, equal to, or greater |
| 2311 | * index than the second. |
| 2312 | */ |
| 2313 | protected static int compareLongs(Map indexMap, |
| 2314 | Object obj1, Object obj2, |
| 2315 | Long fallbackIndex) { |
| 2316 | Long index1 = (Long)indexMap.get(obj1); |
| 2317 | Long index2 = (Long)indexMap.get(obj2); |
| 2318 | |
| 2319 | if (index1 == null) { |
| 2320 | index1 = fallbackIndex; |
| 2321 | } |
| 2322 | if (index2 == null) { |
| 2323 | index2 = fallbackIndex; |
| 2324 | } |
| 2325 | |
| 2326 | return index1.compareTo(index2); |
| 2327 | } |
| 2328 | } |
| 2329 | |
| 2330 | /** |
| 2331 | * An IndexedComparator which compares two String charsets. The comparison |
| 2332 | * follows the rules outlined in DataFlavor.selectBestTextFlavor. In order |
| 2333 | * to ensure that non-Unicode, non-ASCII, non-default charsets are sorted |
| 2334 | * in alphabetical order, charsets are not automatically converted to their |
| 2335 | * canonical forms. |
| 2336 | */ |
| 2337 | public static class CharsetComparator extends IndexedComparator { |
| 2338 | private static final Map charsets; |
| 2339 | private static String defaultEncoding; |
| 2340 | |
| 2341 | private static final Integer DEFAULT_CHARSET_INDEX = Integer.valueOf(2); |
| 2342 | private static final Integer OTHER_CHARSET_INDEX = Integer.valueOf(1); |
| 2343 | private static final Integer WORST_CHARSET_INDEX = Integer.valueOf(0); |
| 2344 | private static final Integer UNSUPPORTED_CHARSET_INDEX = |
| 2345 | Integer.valueOf(Integer.MIN_VALUE); |
| 2346 | |
| 2347 | private static final String UNSUPPORTED_CHARSET = "UNSUPPORTED"; |
| 2348 | |
| 2349 | static { |
| 2350 | HashMap charsetsMap = new HashMap(8, 1.0f); |
| 2351 | |
| 2352 | // we prefer Unicode charsets |
| 2353 | charsetsMap.put(canonicalName("UTF-16LE"), Integer.valueOf(4)); |
| 2354 | charsetsMap.put(canonicalName("UTF-16BE"), Integer.valueOf(5)); |
| 2355 | charsetsMap.put(canonicalName("UTF-8"), Integer.valueOf(6)); |
| 2356 | charsetsMap.put(canonicalName("UTF-16"), Integer.valueOf(7)); |
| 2357 | |
| 2358 | // US-ASCII is the worst charset supported |
| 2359 | charsetsMap.put(canonicalName("US-ASCII"), WORST_CHARSET_INDEX); |
| 2360 | |
| 2361 | String defEncoding = DataTransferer.canonicalName |
| 2362 | (DataTransferer.getDefaultTextCharset()); |
| 2363 | |
| 2364 | if (charsetsMap.get(defaultEncoding) == null) { |
| 2365 | charsetsMap.put(defaultEncoding, DEFAULT_CHARSET_INDEX); |
| 2366 | } |
| 2367 | charsetsMap.put(UNSUPPORTED_CHARSET, UNSUPPORTED_CHARSET_INDEX); |
| 2368 | |
| 2369 | charsets = Collections.unmodifiableMap(charsetsMap); |
| 2370 | } |
| 2371 | |
| 2372 | public CharsetComparator() { |
| 2373 | this(SELECT_BEST); |
| 2374 | } |
| 2375 | |
| 2376 | public CharsetComparator(boolean order) { |
| 2377 | super(order); |
| 2378 | } |
| 2379 | |
| 2380 | /** |
| 2381 | * Compares two String objects. Returns a negative integer, zero, |
| 2382 | * or a positive integer as the first charset is worse than, equal to, |
| 2383 | * or better than the second. |
| 2384 | * |
| 2385 | * @param obj1 the first charset to be compared |
| 2386 | * @param obj2 the second charset to be compared |
| 2387 | * @return a negative integer, zero, or a positive integer as the |
| 2388 | * first argument is worse, equal to, or better than the |
| 2389 | * second. |
| 2390 | * @throws ClassCastException if either of the arguments is not |
| 2391 | * instance of String |
| 2392 | * @throws NullPointerException if either of the arguments is |
| 2393 | * <code>null</code>. |
| 2394 | */ |
| 2395 | public int compare(Object obj1, Object obj2) { |
| 2396 | String charset1 = null; |
| 2397 | String charset2 = null; |
| 2398 | if (order == SELECT_BEST) { |
| 2399 | charset1 = (String)obj1; |
| 2400 | charset2 = (String)obj2; |
| 2401 | } else { |
| 2402 | charset1 = (String)obj2; |
| 2403 | charset2 = (String)obj1; |
| 2404 | } |
| 2405 | |
| 2406 | return compareCharsets(charset1, charset2); |
| 2407 | } |
| 2408 | |
| 2409 | /** |
| 2410 | * Compares charsets. Returns a negative integer, zero, or a positive |
| 2411 | * integer as the first charset is worse than, equal to, or better than |
| 2412 | * the second. |
| 2413 | * <p> |
| 2414 | * Charsets are ordered according to the following rules: |
| 2415 | * <ul> |
| 2416 | * <li>All unsupported charsets are equal. |
| 2417 | * <li>Any unsupported charset is worse than any supported charset. |
| 2418 | * <li>Unicode charsets, such as "UTF-16", "UTF-8", "UTF-16BE" and |
| 2419 | * "UTF-16LE", are considered best. |
| 2420 | * <li>After them, platform default charset is selected. |
| 2421 | * <li>"US-ASCII" is the worst of supported charsets. |
| 2422 | * <li>For all other supported charsets, the lexicographically less |
| 2423 | * one is considered the better. |
| 2424 | * </ul> |
| 2425 | * |
| 2426 | * @param charset1 the first charset to be compared |
| 2427 | * @param charset2 the second charset to be compared. |
| 2428 | * @return a negative integer, zero, or a positive integer as the |
| 2429 | * first argument is worse, equal to, or better than the |
| 2430 | * second. |
| 2431 | */ |
| 2432 | protected int compareCharsets(String charset1, String charset2) { |
| 2433 | charset1 = getEncoding(charset1); |
| 2434 | charset2 = getEncoding(charset2); |
| 2435 | |
| 2436 | int comp = compareIndices(charsets, charset1, charset2, |
| 2437 | OTHER_CHARSET_INDEX); |
| 2438 | |
| 2439 | if (comp == 0) { |
| 2440 | return charset2.compareTo(charset1); |
| 2441 | } |
| 2442 | |
| 2443 | return comp; |
| 2444 | } |
| 2445 | |
| 2446 | /** |
| 2447 | * Returns encoding for the specified charset according to the |
| 2448 | * following rules: |
| 2449 | * <ul> |
| 2450 | * <li>If the charset is <code>null</code>, then <code>null</code> will |
| 2451 | * be returned. |
| 2452 | * <li>Iff the charset specifies an encoding unsupported by this JRE, |
| 2453 | * <code>UNSUPPORTED_CHARSET</code> will be returned. |
| 2454 | * <li>If the charset specifies an alias name, the corresponding |
| 2455 | * canonical name will be returned iff the charset is a known |
| 2456 | * Unicode, ASCII, or default charset. |
| 2457 | * </ul> |
| 2458 | * |
| 2459 | * @param charset the charset. |
| 2460 | * @return an encoding for this charset. |
| 2461 | */ |
| 2462 | protected static String getEncoding(String charset) { |
| 2463 | if (charset == null) { |
| 2464 | return null; |
| 2465 | } else if (!DataTransferer.isEncodingSupported(charset)) { |
| 2466 | return UNSUPPORTED_CHARSET; |
| 2467 | } else { |
| 2468 | // Only convert to canonical form if the charset is one |
| 2469 | // of the charsets explicitly listed in the known charsets |
| 2470 | // map. This will happen only for Unicode, ASCII, or default |
| 2471 | // charsets. |
| 2472 | String canonicalName = DataTransferer.canonicalName(charset); |
| 2473 | return (charsets.containsKey(canonicalName)) |
| 2474 | ? canonicalName |
| 2475 | : charset; |
| 2476 | } |
| 2477 | } |
| 2478 | } |
| 2479 | |
| 2480 | /** |
| 2481 | * An IndexedComparator which compares two DataFlavors. For text flavors, |
| 2482 | * the comparison follows the rules outlined in |
| 2483 | * DataFlavor.selectBestTextFlavor. For non-text flavors, unknown |
| 2484 | * application MIME types are preferred, followed by known |
| 2485 | * application/x-java-* MIME types. Unknown application types are preferred |
| 2486 | * because if the user provides his own data flavor, it will likely be the |
| 2487 | * most descriptive one. For flavors which are otherwise equal, the |
| 2488 | * flavors' native formats are compared, with greater long values |
| 2489 | * taking precedence. |
| 2490 | */ |
| 2491 | public static class DataFlavorComparator extends IndexedComparator { |
| 2492 | protected final Map flavorToFormatMap; |
| 2493 | |
| 2494 | private final CharsetComparator charsetComparator; |
| 2495 | |
| 2496 | private static final Map exactTypes; |
| 2497 | private static final Map primaryTypes; |
| 2498 | private static final Map nonTextRepresentations; |
| 2499 | private static final Map textTypes; |
| 2500 | private static final Map decodedTextRepresentations; |
| 2501 | private static final Map encodedTextRepresentations; |
| 2502 | |
| 2503 | private static final Integer UNKNOWN_OBJECT_LOSES = |
| 2504 | Integer.valueOf(Integer.MIN_VALUE); |
| 2505 | private static final Integer UNKNOWN_OBJECT_WINS = |
| 2506 | Integer.valueOf(Integer.MAX_VALUE); |
| 2507 | |
| 2508 | private static final Long UNKNOWN_OBJECT_LOSES_L = |
| 2509 | Long.valueOf(Long.MIN_VALUE); |
| 2510 | private static final Long UNKNOWN_OBJECT_WINS_L = |
| 2511 | Long.valueOf(Long.MAX_VALUE); |
| 2512 | |
| 2513 | static { |
| 2514 | { |
| 2515 | HashMap exactTypesMap = new HashMap(4, 1.0f); |
| 2516 | |
| 2517 | // application/x-java-* MIME types |
| 2518 | exactTypesMap.put("application/x-java-file-list", |
| 2519 | Integer.valueOf(0)); |
| 2520 | exactTypesMap.put("application/x-java-serialized-object", |
| 2521 | Integer.valueOf(1)); |
| 2522 | exactTypesMap.put("application/x-java-jvm-local-objectref", |
| 2523 | Integer.valueOf(2)); |
| 2524 | exactTypesMap.put("application/x-java-remote-object", |
| 2525 | Integer.valueOf(3)); |
| 2526 | |
| 2527 | exactTypes = Collections.unmodifiableMap(exactTypesMap); |
| 2528 | } |
| 2529 | |
| 2530 | { |
| 2531 | HashMap primaryTypesMap = new HashMap(1, 1.0f); |
| 2532 | |
| 2533 | primaryTypesMap.put("application", Integer.valueOf(0)); |
| 2534 | |
| 2535 | primaryTypes = Collections.unmodifiableMap(primaryTypesMap); |
| 2536 | } |
| 2537 | |
| 2538 | { |
| 2539 | HashMap nonTextRepresentationsMap = new HashMap(3, 1.0f); |
| 2540 | |
| 2541 | nonTextRepresentationsMap.put(java.io.InputStream.class, |
| 2542 | Integer.valueOf(0)); |
| 2543 | nonTextRepresentationsMap.put(java.io.Serializable.class, |
| 2544 | Integer.valueOf(1)); |
| 2545 | nonTextRepresentationsMap.put(java.rmi.Remote.class, |
| 2546 | Integer.valueOf(2)); |
| 2547 | |
| 2548 | nonTextRepresentations = |
| 2549 | Collections.unmodifiableMap(nonTextRepresentationsMap); |
| 2550 | } |
| 2551 | |
| 2552 | { |
| 2553 | HashMap textTypesMap = new HashMap(16, 1.0f); |
| 2554 | |
| 2555 | // plain text |
| 2556 | textTypesMap.put("text/plain", Integer.valueOf(0)); |
| 2557 | |
| 2558 | // stringFlavor |
| 2559 | textTypesMap.put("application/x-java-serialized-object", |
| 2560 | Integer.valueOf(1)); |
| 2561 | |
| 2562 | // misc |
| 2563 | textTypesMap.put("text/calendar", Integer.valueOf(2)); |
| 2564 | textTypesMap.put("text/css", Integer.valueOf(3)); |
| 2565 | textTypesMap.put("text/directory", Integer.valueOf(4)); |
| 2566 | textTypesMap.put("text/parityfec", Integer.valueOf(5)); |
| 2567 | textTypesMap.put("text/rfc822-headers", Integer.valueOf(6)); |
| 2568 | textTypesMap.put("text/t140", Integer.valueOf(7)); |
| 2569 | textTypesMap.put("text/tab-separated-values", Integer.valueOf(8)); |
| 2570 | textTypesMap.put("text/uri-list", Integer.valueOf(9)); |
| 2571 | |
| 2572 | // enriched |
| 2573 | textTypesMap.put("text/richtext", Integer.valueOf(10)); |
| 2574 | textTypesMap.put("text/enriched", Integer.valueOf(11)); |
| 2575 | textTypesMap.put("text/rtf", Integer.valueOf(12)); |
| 2576 | |
| 2577 | // markup |
| 2578 | textTypesMap.put("text/html", Integer.valueOf(13)); |
| 2579 | textTypesMap.put("text/xml", Integer.valueOf(14)); |
| 2580 | textTypesMap.put("text/sgml", Integer.valueOf(15)); |
| 2581 | |
| 2582 | textTypes = Collections.unmodifiableMap(textTypesMap); |
| 2583 | } |
| 2584 | |
| 2585 | { |
| 2586 | HashMap decodedTextRepresentationsMap = new HashMap(4, 1.0f); |
| 2587 | |
| 2588 | decodedTextRepresentationsMap.put |
| 2589 | (DataTransferer.charArrayClass, Integer.valueOf(0)); |
| 2590 | decodedTextRepresentationsMap.put |
| 2591 | (java.nio.CharBuffer.class, Integer.valueOf(1)); |
| 2592 | decodedTextRepresentationsMap.put |
| 2593 | (java.lang.String.class, Integer.valueOf(2)); |
| 2594 | decodedTextRepresentationsMap.put |
| 2595 | (java.io.Reader.class, Integer.valueOf(3)); |
| 2596 | |
| 2597 | decodedTextRepresentations = |
| 2598 | Collections.unmodifiableMap(decodedTextRepresentationsMap); |
| 2599 | } |
| 2600 | |
| 2601 | { |
| 2602 | HashMap encodedTextRepresentationsMap = new HashMap(3, 1.0f); |
| 2603 | |
| 2604 | encodedTextRepresentationsMap.put |
| 2605 | (DataTransferer.byteArrayClass, Integer.valueOf(0)); |
| 2606 | encodedTextRepresentationsMap.put |
| 2607 | (java.nio.ByteBuffer.class, Integer.valueOf(1)); |
| 2608 | encodedTextRepresentationsMap.put |
| 2609 | (java.io.InputStream.class, Integer.valueOf(2)); |
| 2610 | |
| 2611 | encodedTextRepresentations = |
| 2612 | Collections.unmodifiableMap(encodedTextRepresentationsMap); |
| 2613 | } |
| 2614 | } |
| 2615 | |
| 2616 | public DataFlavorComparator() { |
| 2617 | this(SELECT_BEST); |
| 2618 | } |
| 2619 | |
| 2620 | public DataFlavorComparator(boolean order) { |
| 2621 | super(order); |
| 2622 | |
| 2623 | charsetComparator = new CharsetComparator(order); |
| 2624 | flavorToFormatMap = Collections.EMPTY_MAP; |
| 2625 | } |
| 2626 | |
| 2627 | public DataFlavorComparator(Map map) { |
| 2628 | this(map, SELECT_BEST); |
| 2629 | } |
| 2630 | |
| 2631 | public DataFlavorComparator(Map map, boolean order) { |
| 2632 | super(order); |
| 2633 | |
| 2634 | charsetComparator = new CharsetComparator(order); |
| 2635 | HashMap hashMap = new HashMap(map.size()); |
| 2636 | hashMap.putAll(map); |
| 2637 | flavorToFormatMap = Collections.unmodifiableMap(hashMap); |
| 2638 | } |
| 2639 | |
| 2640 | public int compare(Object obj1, Object obj2) { |
| 2641 | DataFlavor flavor1 = null; |
| 2642 | DataFlavor flavor2 = null; |
| 2643 | if (order == SELECT_BEST) { |
| 2644 | flavor1 = (DataFlavor)obj1; |
| 2645 | flavor2 = (DataFlavor)obj2; |
| 2646 | } else { |
| 2647 | flavor1 = (DataFlavor)obj2; |
| 2648 | flavor2 = (DataFlavor)obj1; |
| 2649 | } |
| 2650 | |
| 2651 | if (flavor1.equals(flavor2)) { |
| 2652 | return 0; |
| 2653 | } |
| 2654 | |
| 2655 | int comp = 0; |
| 2656 | |
| 2657 | String primaryType1 = flavor1.getPrimaryType(); |
| 2658 | String subType1 = flavor1.getSubType(); |
| 2659 | String mimeType1 = primaryType1 + "/" + subType1; |
| 2660 | Class class1 = flavor1.getRepresentationClass(); |
| 2661 | |
| 2662 | String primaryType2 = flavor2.getPrimaryType(); |
| 2663 | String subType2 = flavor2.getSubType(); |
| 2664 | String mimeType2 = primaryType2 + "/" + subType2; |
| 2665 | Class class2 = flavor2.getRepresentationClass(); |
| 2666 | |
| 2667 | if (flavor1.isFlavorTextType() && flavor2.isFlavorTextType()) { |
| 2668 | // First, compare MIME types |
| 2669 | comp = compareIndices(textTypes, mimeType1, mimeType2, |
| 2670 | UNKNOWN_OBJECT_LOSES); |
| 2671 | if (comp != 0) { |
| 2672 | return comp; |
| 2673 | } |
| 2674 | |
| 2675 | // Only need to test one flavor because they both have the |
| 2676 | // same MIME type. Also don't need to worry about accidentally |
| 2677 | // passing stringFlavor because either |
| 2678 | // 1. Both flavors are stringFlavor, in which case the |
| 2679 | // equality test at the top of the function succeeded. |
| 2680 | // 2. Only one flavor is stringFlavor, in which case the MIME |
| 2681 | // type comparison returned a non-zero value. |
| 2682 | if (doesSubtypeSupportCharset(flavor1)) { |
| 2683 | // Next, prefer the decoded text representations of Reader, |
| 2684 | // String, CharBuffer, and [C, in that order. |
| 2685 | comp = compareIndices(decodedTextRepresentations, class1, |
| 2686 | class2, UNKNOWN_OBJECT_LOSES); |
| 2687 | if (comp != 0) { |
| 2688 | return comp; |
| 2689 | } |
| 2690 | |
| 2691 | // Next, compare charsets |
| 2692 | comp = charsetComparator.compareCharsets |
| 2693 | (DataTransferer.getTextCharset(flavor1), |
| 2694 | DataTransferer.getTextCharset(flavor2)); |
| 2695 | if (comp != 0) { |
| 2696 | return comp; |
| 2697 | } |
| 2698 | } |
| 2699 | |
| 2700 | // Finally, prefer the encoded text representations of |
| 2701 | // InputStream, ByteBuffer, and [B, in that order. |
| 2702 | comp = compareIndices(encodedTextRepresentations, class1, |
| 2703 | class2, UNKNOWN_OBJECT_LOSES); |
| 2704 | if (comp != 0) { |
| 2705 | return comp; |
| 2706 | } |
| 2707 | } else { |
| 2708 | // First, prefer application types. |
| 2709 | comp = compareIndices(primaryTypes, primaryType1, primaryType2, |
| 2710 | UNKNOWN_OBJECT_LOSES); |
| 2711 | if (comp != 0) { |
| 2712 | return comp; |
| 2713 | } |
| 2714 | |
| 2715 | // Next, look for application/x-java-* types. Prefer unknown |
| 2716 | // MIME types because if the user provides his own data flavor, |
| 2717 | // it will likely be the most descriptive one. |
| 2718 | comp = compareIndices(exactTypes, mimeType1, mimeType2, |
| 2719 | UNKNOWN_OBJECT_WINS); |
| 2720 | if (comp != 0) { |
| 2721 | return comp; |
| 2722 | } |
| 2723 | |
| 2724 | // Finally, prefer the representation classes of Remote, |
| 2725 | // Serializable, and InputStream, in that order. |
| 2726 | comp = compareIndices(nonTextRepresentations, class1, class2, |
| 2727 | UNKNOWN_OBJECT_LOSES); |
| 2728 | if (comp != 0) { |
| 2729 | return comp; |
| 2730 | } |
| 2731 | } |
| 2732 | |
| 2733 | // As a last resort, take the DataFlavor with the greater integer |
| 2734 | // format. |
| 2735 | return compareLongs(flavorToFormatMap, flavor1, flavor2, |
| 2736 | UNKNOWN_OBJECT_LOSES_L); |
| 2737 | } |
| 2738 | } |
| 2739 | |
| 2740 | /* |
| 2741 | * Given the Map that maps objects to Integer indices and a boolean value, |
| 2742 | * this Comparator imposes a direct or reverse order on set of objects. |
| 2743 | * <p> |
| 2744 | * If the specified boolean value is SELECT_BEST, the Comparator imposes the |
| 2745 | * direct index-based order: an object A is greater than an object B if and |
| 2746 | * only if the index of A is greater than the index of B. An object that |
| 2747 | * doesn't have an associated index is less or equal than any other object. |
| 2748 | * <p> |
| 2749 | * If the specified boolean value is SELECT_WORST, the Comparator imposes the |
| 2750 | * reverse index-based order: an object A is greater than an object B if and |
| 2751 | * only if A is less than B with the direct index-based order. |
| 2752 | */ |
| 2753 | public static class IndexOrderComparator extends IndexedComparator { |
| 2754 | private final Map indexMap; |
| 2755 | private static final Integer FALLBACK_INDEX = |
| 2756 | Integer.valueOf(Integer.MIN_VALUE); |
| 2757 | |
| 2758 | public IndexOrderComparator(Map indexMap) { |
| 2759 | super(SELECT_BEST); |
| 2760 | this.indexMap = indexMap; |
| 2761 | } |
| 2762 | |
| 2763 | public IndexOrderComparator(Map indexMap, boolean order) { |
| 2764 | super(order); |
| 2765 | this.indexMap = indexMap; |
| 2766 | } |
| 2767 | |
| 2768 | public int compare(Object obj1, Object obj2) { |
| 2769 | if (order == SELECT_WORST) { |
| 2770 | return -compareIndices(indexMap, obj1, obj2, FALLBACK_INDEX); |
| 2771 | } else { |
| 2772 | return compareIndices(indexMap, obj1, obj2, FALLBACK_INDEX); |
| 2773 | } |
| 2774 | } |
| 2775 | } |
| 2776 | } |