Jake Slack | 03928ae | 2014-05-13 18:41:56 -0700 | [diff] [blame] | 1 | // |
| 2 | // ======================================================================== |
| 3 | // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
| 4 | // ------------------------------------------------------------------------ |
| 5 | // All rights reserved. This program and the accompanying materials |
| 6 | // are made available under the terms of the Eclipse Public License v1.0 |
| 7 | // and Apache License v2.0 which accompanies this distribution. |
| 8 | // |
| 9 | // The Eclipse Public License is available at |
| 10 | // http://www.eclipse.org/legal/epl-v10.html |
| 11 | // |
| 12 | // The Apache License v2.0 is available at |
| 13 | // http://www.opensource.org/licenses/apache2.0.php |
| 14 | // |
| 15 | // You may elect to redistribute this code under either of these licenses. |
| 16 | // ======================================================================== |
| 17 | // |
| 18 | |
| 19 | package org.eclipse.jetty.util.ajax; |
| 20 | |
| 21 | import java.io.Externalizable; |
| 22 | import java.io.IOException; |
| 23 | import java.io.InputStream; |
| 24 | import java.io.Reader; |
| 25 | import java.lang.reflect.Array; |
| 26 | import java.util.ArrayList; |
| 27 | import java.util.Collection; |
| 28 | import java.util.HashMap; |
| 29 | import java.util.Iterator; |
| 30 | import java.util.Map; |
| 31 | import java.util.concurrent.ConcurrentHashMap; |
| 32 | |
| 33 | import org.eclipse.jetty.util.IO; |
| 34 | import org.eclipse.jetty.util.Loader; |
| 35 | import org.eclipse.jetty.util.QuotedStringTokenizer; |
| 36 | import org.eclipse.jetty.util.TypeUtil; |
| 37 | import org.eclipse.jetty.util.log.Log; |
| 38 | import org.eclipse.jetty.util.log.Logger; |
| 39 | |
| 40 | /** |
| 41 | * JSON Parser and Generator. |
| 42 | * <p /> |
| 43 | * This class provides some static methods to convert POJOs to and from JSON |
| 44 | * notation. The mapping from JSON to java is: |
| 45 | * |
| 46 | * <pre> |
| 47 | * object ==> Map |
| 48 | * array ==> Object[] |
| 49 | * number ==> Double or Long |
| 50 | * string ==> String |
| 51 | * null ==> null |
| 52 | * bool ==> Boolean |
| 53 | * </pre> |
| 54 | |
| 55 | * The java to JSON mapping is: |
| 56 | * |
| 57 | * <pre> |
| 58 | * String --> string |
| 59 | * Number --> number |
| 60 | * Map --> object |
| 61 | * List --> array |
| 62 | * Array --> array |
| 63 | * null --> null |
| 64 | * Boolean--> boolean |
| 65 | * Object --> string (dubious!) |
| 66 | * </pre> |
| 67 | * |
| 68 | * The interface {@link JSON.Convertible} may be implemented by classes that |
| 69 | * wish to externalize and initialize specific fields to and from JSON objects. |
| 70 | * Only directed acyclic graphs of objects are supported. |
| 71 | * <p /> |
| 72 | * The interface {@link JSON.Generator} may be implemented by classes that know |
| 73 | * how to render themselves as JSON and the {@link #toString(Object)} method |
| 74 | * will use {@link JSON.Generator#addJSON(Appendable)} to generate the JSON. |
| 75 | * The class {@link JSON.Literal} may be used to hold pre-generated JSON object. |
| 76 | * <p /> |
| 77 | * The interface {@link JSON.Convertor} may be implemented to provide static |
| 78 | * converters for objects that may be registered with |
| 79 | * {@link #registerConvertor(Class, Convertor)}. |
| 80 | * These converters are looked up by class, interface and super class by |
| 81 | * {@link #getConvertor(Class)}. |
| 82 | * <p /> |
| 83 | * If a JSON object has a "class" field, then a java class for that name is |
| 84 | * loaded and the method {@link #convertTo(Class,Map)} is used to find a |
| 85 | * {@link JSON.Convertor} for that class. |
| 86 | * <p /> |
| 87 | * If a JSON object has a "x-class" field then a direct lookup for a |
| 88 | * {@link JSON.Convertor} for that class name is done (without loading the class). |
| 89 | */ |
| 90 | public class JSON |
| 91 | { |
| 92 | static final Logger LOG = Log.getLogger(JSON.class); |
| 93 | public final static JSON DEFAULT = new JSON(); |
| 94 | |
| 95 | private Map<String, Convertor> _convertors = new ConcurrentHashMap<String, Convertor>(); |
| 96 | private int _stringBufferSize = 1024; |
| 97 | |
| 98 | public JSON() |
| 99 | { |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * @return the initial stringBuffer size to use when creating JSON strings |
| 104 | * (default 1024) |
| 105 | */ |
| 106 | public int getStringBufferSize() |
| 107 | { |
| 108 | return _stringBufferSize; |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * @param stringBufferSize |
| 113 | * the initial stringBuffer size to use when creating JSON |
| 114 | * strings (default 1024) |
| 115 | */ |
| 116 | public void setStringBufferSize(int stringBufferSize) |
| 117 | { |
| 118 | _stringBufferSize = stringBufferSize; |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * Register a {@link Convertor} for a class or interface. |
| 123 | * |
| 124 | * @param forClass |
| 125 | * The class or interface that the convertor applies to |
| 126 | * @param convertor |
| 127 | * the convertor |
| 128 | */ |
| 129 | public static void registerConvertor(Class forClass, Convertor convertor) |
| 130 | { |
| 131 | DEFAULT.addConvertor(forClass,convertor); |
| 132 | } |
| 133 | |
| 134 | public static JSON getDefault() |
| 135 | { |
| 136 | return DEFAULT; |
| 137 | } |
| 138 | |
| 139 | @Deprecated |
| 140 | public static void setDefault(JSON json) |
| 141 | { |
| 142 | } |
| 143 | |
| 144 | public static String toString(Object object) |
| 145 | { |
| 146 | StringBuilder buffer = new StringBuilder(DEFAULT.getStringBufferSize()); |
| 147 | DEFAULT.append(buffer,object); |
| 148 | return buffer.toString(); |
| 149 | } |
| 150 | |
| 151 | public static String toString(Map object) |
| 152 | { |
| 153 | StringBuilder buffer = new StringBuilder(DEFAULT.getStringBufferSize()); |
| 154 | DEFAULT.appendMap(buffer,object); |
| 155 | return buffer.toString(); |
| 156 | } |
| 157 | |
| 158 | public static String toString(Object[] array) |
| 159 | { |
| 160 | StringBuilder buffer = new StringBuilder(DEFAULT.getStringBufferSize()); |
| 161 | DEFAULT.appendArray(buffer,array); |
| 162 | return buffer.toString(); |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * @param s |
| 167 | * String containing JSON object or array. |
| 168 | * @return A Map, Object array or primitive array parsed from the JSON. |
| 169 | */ |
| 170 | public static Object parse(String s) |
| 171 | { |
| 172 | return DEFAULT.parse(new StringSource(s),false); |
| 173 | } |
| 174 | |
| 175 | /** |
| 176 | * @param s |
| 177 | * String containing JSON object or array. |
| 178 | * @param stripOuterComment |
| 179 | * If true, an outer comment around the JSON is ignored. |
| 180 | * @return A Map, Object array or primitive array parsed from the JSON. |
| 181 | */ |
| 182 | public static Object parse(String s, boolean stripOuterComment) |
| 183 | { |
| 184 | return DEFAULT.parse(new StringSource(s),stripOuterComment); |
| 185 | } |
| 186 | |
| 187 | /** |
| 188 | * @param in |
| 189 | * Reader containing JSON object or array. |
| 190 | * @return A Map, Object array or primitive array parsed from the JSON. |
| 191 | */ |
| 192 | public static Object parse(Reader in) throws IOException |
| 193 | { |
| 194 | return DEFAULT.parse(new ReaderSource(in),false); |
| 195 | } |
| 196 | |
| 197 | /** |
| 198 | * @param in |
| 199 | * Reader containing JSON object or array. |
| 200 | * @param stripOuterComment |
| 201 | * If true, an outer comment around the JSON is ignored. |
| 202 | * @return A Map, Object array or primitive array parsed from the JSON. |
| 203 | */ |
| 204 | public static Object parse(Reader in, boolean stripOuterComment) throws IOException |
| 205 | { |
| 206 | return DEFAULT.parse(new ReaderSource(in),stripOuterComment); |
| 207 | } |
| 208 | |
| 209 | /** |
| 210 | * @deprecated use {@link #parse(Reader)} |
| 211 | * @param in |
| 212 | * Reader containing JSON object or array. |
| 213 | * @return A Map, Object array or primitive array parsed from the JSON. |
| 214 | */ |
| 215 | @Deprecated |
| 216 | public static Object parse(InputStream in) throws IOException |
| 217 | { |
| 218 | return DEFAULT.parse(new StringSource(IO.toString(in)),false); |
| 219 | } |
| 220 | |
| 221 | /** |
| 222 | * @deprecated use {@link #parse(Reader, boolean)} |
| 223 | * @param in |
| 224 | * Stream containing JSON object or array. |
| 225 | * @param stripOuterComment |
| 226 | * If true, an outer comment around the JSON is ignored. |
| 227 | * @return A Map, Object array or primitive array parsed from the JSON. |
| 228 | */ |
| 229 | @Deprecated |
| 230 | public static Object parse(InputStream in, boolean stripOuterComment) throws IOException |
| 231 | { |
| 232 | return DEFAULT.parse(new StringSource(IO.toString(in)),stripOuterComment); |
| 233 | } |
| 234 | |
| 235 | /** |
| 236 | * Convert Object to JSON |
| 237 | * |
| 238 | * @param object |
| 239 | * The object to convert |
| 240 | * @return The JSON String |
| 241 | */ |
| 242 | public String toJSON(Object object) |
| 243 | { |
| 244 | StringBuilder buffer = new StringBuilder(getStringBufferSize()); |
| 245 | append(buffer,object); |
| 246 | return buffer.toString(); |
| 247 | } |
| 248 | |
| 249 | /** |
| 250 | * Convert JSON to Object |
| 251 | * |
| 252 | * @param json |
| 253 | * The json to convert |
| 254 | * @return The object |
| 255 | */ |
| 256 | public Object fromJSON(String json) |
| 257 | { |
| 258 | Source source = new StringSource(json); |
| 259 | return parse(source); |
| 260 | } |
| 261 | |
| 262 | @Deprecated |
| 263 | public void append(StringBuffer buffer, Object object) |
| 264 | { |
| 265 | append((Appendable)buffer,object); |
| 266 | } |
| 267 | |
| 268 | /** |
| 269 | * Append object as JSON to string buffer. |
| 270 | * |
| 271 | * @param buffer |
| 272 | * the buffer to append to |
| 273 | * @param object |
| 274 | * the object to append |
| 275 | */ |
| 276 | public void append(Appendable buffer, Object object) |
| 277 | { |
| 278 | try |
| 279 | { |
| 280 | if (object == null) |
| 281 | { |
| 282 | buffer.append("null"); |
| 283 | } |
| 284 | // Most likely first |
| 285 | else if (object instanceof Map) |
| 286 | { |
| 287 | appendMap(buffer,(Map)object); |
| 288 | } |
| 289 | else if (object instanceof String) |
| 290 | { |
| 291 | appendString(buffer,(String)object); |
| 292 | } |
| 293 | else if (object instanceof Number) |
| 294 | { |
| 295 | appendNumber(buffer,(Number)object); |
| 296 | } |
| 297 | else if (object instanceof Boolean) |
| 298 | { |
| 299 | appendBoolean(buffer,(Boolean)object); |
| 300 | } |
| 301 | else if (object.getClass().isArray()) |
| 302 | { |
| 303 | appendArray(buffer,object); |
| 304 | } |
| 305 | else if (object instanceof Character) |
| 306 | { |
| 307 | appendString(buffer,object.toString()); |
| 308 | } |
| 309 | else if (object instanceof Convertible) |
| 310 | { |
| 311 | appendJSON(buffer,(Convertible)object); |
| 312 | } |
| 313 | else if (object instanceof Generator) |
| 314 | { |
| 315 | appendJSON(buffer,(Generator)object); |
| 316 | } |
| 317 | else |
| 318 | { |
| 319 | // Check Convertor before Collection to support JSONCollectionConvertor |
| 320 | Convertor convertor = getConvertor(object.getClass()); |
| 321 | if (convertor != null) |
| 322 | { |
| 323 | appendJSON(buffer,convertor,object); |
| 324 | } |
| 325 | else if (object instanceof Collection) |
| 326 | { |
| 327 | appendArray(buffer,(Collection)object); |
| 328 | } |
| 329 | else |
| 330 | { |
| 331 | appendString(buffer,object.toString()); |
| 332 | } |
| 333 | } |
| 334 | } |
| 335 | catch (IOException e) |
| 336 | { |
| 337 | throw new RuntimeException(e); |
| 338 | } |
| 339 | } |
| 340 | |
| 341 | @Deprecated |
| 342 | public void appendNull(StringBuffer buffer) |
| 343 | { |
| 344 | appendNull((Appendable)buffer); |
| 345 | } |
| 346 | |
| 347 | public void appendNull(Appendable buffer) |
| 348 | { |
| 349 | try |
| 350 | { |
| 351 | buffer.append("null"); |
| 352 | } |
| 353 | catch (IOException e) |
| 354 | { |
| 355 | throw new RuntimeException(e); |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | @Deprecated |
| 360 | public void appendJSON(final StringBuffer buffer, final Convertor convertor, final Object object) |
| 361 | { |
| 362 | appendJSON((Appendable)buffer,convertor,object); |
| 363 | } |
| 364 | |
| 365 | public void appendJSON(final Appendable buffer, final Convertor convertor, final Object object) |
| 366 | { |
| 367 | appendJSON(buffer,new Convertible() |
| 368 | { |
| 369 | public void fromJSON(Map object) |
| 370 | { |
| 371 | } |
| 372 | |
| 373 | public void toJSON(Output out) |
| 374 | { |
| 375 | convertor.toJSON(object,out); |
| 376 | } |
| 377 | }); |
| 378 | } |
| 379 | |
| 380 | @Deprecated |
| 381 | public void appendJSON(final StringBuffer buffer, Convertible converter) |
| 382 | { |
| 383 | appendJSON((Appendable)buffer,converter); |
| 384 | } |
| 385 | |
| 386 | public void appendJSON(final Appendable buffer, Convertible converter) |
| 387 | { |
| 388 | ConvertableOutput out=new ConvertableOutput(buffer); |
| 389 | converter.toJSON(out); |
| 390 | out.complete(); |
| 391 | } |
| 392 | |
| 393 | @Deprecated |
| 394 | public void appendJSON(StringBuffer buffer, Generator generator) |
| 395 | { |
| 396 | generator.addJSON(buffer); |
| 397 | } |
| 398 | |
| 399 | public void appendJSON(Appendable buffer, Generator generator) |
| 400 | { |
| 401 | generator.addJSON(buffer); |
| 402 | } |
| 403 | |
| 404 | @Deprecated |
| 405 | public void appendMap(StringBuffer buffer, Map<?,?> map) |
| 406 | { |
| 407 | appendMap((Appendable)buffer,map); |
| 408 | } |
| 409 | |
| 410 | public void appendMap(Appendable buffer, Map<?,?> map) |
| 411 | { |
| 412 | try |
| 413 | { |
| 414 | if (map == null) |
| 415 | { |
| 416 | appendNull(buffer); |
| 417 | return; |
| 418 | } |
| 419 | |
| 420 | buffer.append('{'); |
| 421 | Iterator<?> iter = map.entrySet().iterator(); |
| 422 | while (iter.hasNext()) |
| 423 | { |
| 424 | Map.Entry<?,?> entry = (Map.Entry<?,?>)iter.next(); |
| 425 | QuotedStringTokenizer.quote(buffer,entry.getKey().toString()); |
| 426 | buffer.append(':'); |
| 427 | append(buffer,entry.getValue()); |
| 428 | if (iter.hasNext()) |
| 429 | buffer.append(','); |
| 430 | } |
| 431 | |
| 432 | buffer.append('}'); |
| 433 | } |
| 434 | catch (IOException e) |
| 435 | { |
| 436 | throw new RuntimeException(e); |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | @Deprecated |
| 441 | public void appendArray(StringBuffer buffer, Collection collection) |
| 442 | { |
| 443 | appendArray((Appendable)buffer,collection); |
| 444 | } |
| 445 | |
| 446 | public void appendArray(Appendable buffer, Collection collection) |
| 447 | { |
| 448 | try |
| 449 | { |
| 450 | if (collection == null) |
| 451 | { |
| 452 | appendNull(buffer); |
| 453 | return; |
| 454 | } |
| 455 | |
| 456 | buffer.append('['); |
| 457 | Iterator iter = collection.iterator(); |
| 458 | boolean first = true; |
| 459 | while (iter.hasNext()) |
| 460 | { |
| 461 | if (!first) |
| 462 | buffer.append(','); |
| 463 | |
| 464 | first = false; |
| 465 | append(buffer,iter.next()); |
| 466 | } |
| 467 | |
| 468 | buffer.append(']'); |
| 469 | } |
| 470 | catch (IOException e) |
| 471 | { |
| 472 | throw new RuntimeException(e); |
| 473 | } |
| 474 | } |
| 475 | |
| 476 | @Deprecated |
| 477 | public void appendArray(StringBuffer buffer, Object array) |
| 478 | { |
| 479 | appendArray((Appendable)buffer,array); |
| 480 | } |
| 481 | |
| 482 | public void appendArray(Appendable buffer, Object array) |
| 483 | { |
| 484 | try |
| 485 | { |
| 486 | if (array == null) |
| 487 | { |
| 488 | appendNull(buffer); |
| 489 | return; |
| 490 | } |
| 491 | |
| 492 | buffer.append('['); |
| 493 | int length = Array.getLength(array); |
| 494 | |
| 495 | for (int i = 0; i < length; i++) |
| 496 | { |
| 497 | if (i != 0) |
| 498 | buffer.append(','); |
| 499 | append(buffer,Array.get(array,i)); |
| 500 | } |
| 501 | |
| 502 | buffer.append(']'); |
| 503 | } |
| 504 | catch (IOException e) |
| 505 | { |
| 506 | throw new RuntimeException(e); |
| 507 | } |
| 508 | } |
| 509 | |
| 510 | @Deprecated |
| 511 | public void appendBoolean(StringBuffer buffer, Boolean b) |
| 512 | { |
| 513 | appendBoolean((Appendable)buffer,b); |
| 514 | } |
| 515 | |
| 516 | public void appendBoolean(Appendable buffer, Boolean b) |
| 517 | { |
| 518 | try |
| 519 | { |
| 520 | if (b == null) |
| 521 | { |
| 522 | appendNull(buffer); |
| 523 | return; |
| 524 | } |
| 525 | buffer.append(b?"true":"false"); |
| 526 | } |
| 527 | catch (IOException e) |
| 528 | { |
| 529 | throw new RuntimeException(e); |
| 530 | } |
| 531 | } |
| 532 | |
| 533 | @Deprecated |
| 534 | public void appendNumber(StringBuffer buffer, Number number) |
| 535 | { |
| 536 | appendNumber((Appendable)buffer,number); |
| 537 | } |
| 538 | |
| 539 | public void appendNumber(Appendable buffer, Number number) |
| 540 | { |
| 541 | try |
| 542 | { |
| 543 | if (number == null) |
| 544 | { |
| 545 | appendNull(buffer); |
| 546 | return; |
| 547 | } |
| 548 | buffer.append(String.valueOf(number)); |
| 549 | } |
| 550 | catch (IOException e) |
| 551 | { |
| 552 | throw new RuntimeException(e); |
| 553 | } |
| 554 | } |
| 555 | |
| 556 | @Deprecated |
| 557 | public void appendString(StringBuffer buffer, String string) |
| 558 | { |
| 559 | appendString((Appendable)buffer,string); |
| 560 | } |
| 561 | |
| 562 | public void appendString(Appendable buffer, String string) |
| 563 | { |
| 564 | if (string == null) |
| 565 | { |
| 566 | appendNull(buffer); |
| 567 | return; |
| 568 | } |
| 569 | |
| 570 | QuotedStringTokenizer.quote(buffer,string); |
| 571 | } |
| 572 | |
| 573 | // Parsing utilities |
| 574 | |
| 575 | protected String toString(char[] buffer, int offset, int length) |
| 576 | { |
| 577 | return new String(buffer,offset,length); |
| 578 | } |
| 579 | |
| 580 | protected Map<String, Object> newMap() |
| 581 | { |
| 582 | return new HashMap<String, Object>(); |
| 583 | } |
| 584 | |
| 585 | protected Object[] newArray(int size) |
| 586 | { |
| 587 | return new Object[size]; |
| 588 | } |
| 589 | |
| 590 | protected JSON contextForArray() |
| 591 | { |
| 592 | return this; |
| 593 | } |
| 594 | |
| 595 | protected JSON contextFor(String field) |
| 596 | { |
| 597 | return this; |
| 598 | } |
| 599 | |
| 600 | protected Object convertTo(Class type, Map map) |
| 601 | { |
| 602 | if (type != null && Convertible.class.isAssignableFrom(type)) |
| 603 | { |
| 604 | try |
| 605 | { |
| 606 | Convertible conv = (Convertible)type.newInstance(); |
| 607 | conv.fromJSON(map); |
| 608 | return conv; |
| 609 | } |
| 610 | catch (Exception e) |
| 611 | { |
| 612 | throw new RuntimeException(e); |
| 613 | } |
| 614 | } |
| 615 | |
| 616 | Convertor convertor = getConvertor(type); |
| 617 | if (convertor != null) |
| 618 | { |
| 619 | return convertor.fromJSON(map); |
| 620 | } |
| 621 | return map; |
| 622 | } |
| 623 | |
| 624 | /** |
| 625 | * Register a {@link Convertor} for a class or interface. |
| 626 | * |
| 627 | * @param forClass |
| 628 | * The class or interface that the convertor applies to |
| 629 | * @param convertor |
| 630 | * the convertor |
| 631 | */ |
| 632 | public void addConvertor(Class forClass, Convertor convertor) |
| 633 | { |
| 634 | _convertors.put(forClass.getName(),convertor); |
| 635 | } |
| 636 | |
| 637 | /** |
| 638 | * Lookup a convertor for a class. |
| 639 | * <p> |
| 640 | * If no match is found for the class, then the interfaces for the class are |
| 641 | * tried. If still no match is found, then the super class and it's |
| 642 | * interfaces are tried recursively. |
| 643 | * |
| 644 | * @param forClass |
| 645 | * The class |
| 646 | * @return a {@link JSON.Convertor} or null if none were found. |
| 647 | */ |
| 648 | protected Convertor getConvertor(Class forClass) |
| 649 | { |
| 650 | Class cls = forClass; |
| 651 | Convertor convertor = _convertors.get(cls.getName()); |
| 652 | if (convertor == null && this != DEFAULT) |
| 653 | convertor = DEFAULT.getConvertor(cls); |
| 654 | |
| 655 | while (convertor == null && cls != Object.class) |
| 656 | { |
| 657 | Class[] ifs = cls.getInterfaces(); |
| 658 | int i = 0; |
| 659 | while (convertor == null && ifs != null && i < ifs.length) |
| 660 | convertor = _convertors.get(ifs[i++].getName()); |
| 661 | if (convertor == null) |
| 662 | { |
| 663 | cls = cls.getSuperclass(); |
| 664 | convertor = _convertors.get(cls.getName()); |
| 665 | } |
| 666 | } |
| 667 | return convertor; |
| 668 | } |
| 669 | |
| 670 | /** |
| 671 | * Register a {@link JSON.Convertor} for a named class or interface. |
| 672 | * |
| 673 | * @param name |
| 674 | * name of a class or an interface that the convertor applies to |
| 675 | * @param convertor |
| 676 | * the convertor |
| 677 | */ |
| 678 | public void addConvertorFor(String name, Convertor convertor) |
| 679 | { |
| 680 | _convertors.put(name,convertor); |
| 681 | } |
| 682 | |
| 683 | /** |
| 684 | * Lookup a convertor for a named class. |
| 685 | * |
| 686 | * @param name |
| 687 | * name of the class |
| 688 | * @return a {@link JSON.Convertor} or null if none were found. |
| 689 | */ |
| 690 | public Convertor getConvertorFor(String name) |
| 691 | { |
| 692 | Convertor convertor = _convertors.get(name); |
| 693 | if (convertor == null && this != DEFAULT) |
| 694 | convertor = DEFAULT.getConvertorFor(name); |
| 695 | return convertor; |
| 696 | } |
| 697 | |
| 698 | public Object parse(Source source, boolean stripOuterComment) |
| 699 | { |
| 700 | int comment_state = 0; // 0=no comment, 1="/", 2="/*", 3="/* *" -1="//" |
| 701 | if (!stripOuterComment) |
| 702 | return parse(source); |
| 703 | |
| 704 | int strip_state = 1; // 0=no strip, 1=wait for /*, 2= wait for */ |
| 705 | |
| 706 | Object o = null; |
| 707 | while (source.hasNext()) |
| 708 | { |
| 709 | char c = source.peek(); |
| 710 | |
| 711 | // handle // or /* comment |
| 712 | if (comment_state == 1) |
| 713 | { |
| 714 | switch (c) |
| 715 | { |
| 716 | case '/': |
| 717 | comment_state = -1; |
| 718 | break; |
| 719 | case '*': |
| 720 | comment_state = 2; |
| 721 | if (strip_state == 1) |
| 722 | { |
| 723 | comment_state = 0; |
| 724 | strip_state = 2; |
| 725 | } |
| 726 | } |
| 727 | } |
| 728 | // handle /* */ comment |
| 729 | else if (comment_state > 1) |
| 730 | { |
| 731 | switch (c) |
| 732 | { |
| 733 | case '*': |
| 734 | comment_state = 3; |
| 735 | break; |
| 736 | case '/': |
| 737 | if (comment_state == 3) |
| 738 | { |
| 739 | comment_state = 0; |
| 740 | if (strip_state == 2) |
| 741 | return o; |
| 742 | } |
| 743 | else |
| 744 | comment_state = 2; |
| 745 | break; |
| 746 | default: |
| 747 | comment_state = 2; |
| 748 | } |
| 749 | } |
| 750 | // handle // comment |
| 751 | else if (comment_state < 0) |
| 752 | { |
| 753 | switch (c) |
| 754 | { |
| 755 | case '\r': |
| 756 | case '\n': |
| 757 | comment_state = 0; |
| 758 | default: |
| 759 | break; |
| 760 | } |
| 761 | } |
| 762 | // handle unknown |
| 763 | else |
| 764 | { |
| 765 | if (!Character.isWhitespace(c)) |
| 766 | { |
| 767 | if (c == '/') |
| 768 | comment_state = 1; |
| 769 | else if (c == '*') |
| 770 | comment_state = 3; |
| 771 | else if (o == null) |
| 772 | { |
| 773 | o = parse(source); |
| 774 | continue; |
| 775 | } |
| 776 | } |
| 777 | } |
| 778 | |
| 779 | source.next(); |
| 780 | } |
| 781 | |
| 782 | return o; |
| 783 | } |
| 784 | |
| 785 | public Object parse(Source source) |
| 786 | { |
| 787 | int comment_state = 0; // 0=no comment, 1="/", 2="/*", 3="/* *" -1="//" |
| 788 | |
| 789 | while (source.hasNext()) |
| 790 | { |
| 791 | char c = source.peek(); |
| 792 | |
| 793 | // handle // or /* comment |
| 794 | if (comment_state == 1) |
| 795 | { |
| 796 | switch (c) |
| 797 | { |
| 798 | case '/': |
| 799 | comment_state = -1; |
| 800 | break; |
| 801 | case '*': |
| 802 | comment_state = 2; |
| 803 | } |
| 804 | } |
| 805 | // handle /* */ comment |
| 806 | else if (comment_state > 1) |
| 807 | { |
| 808 | switch (c) |
| 809 | { |
| 810 | case '*': |
| 811 | comment_state = 3; |
| 812 | break; |
| 813 | case '/': |
| 814 | if (comment_state == 3) |
| 815 | comment_state = 0; |
| 816 | else |
| 817 | comment_state = 2; |
| 818 | break; |
| 819 | default: |
| 820 | comment_state = 2; |
| 821 | } |
| 822 | } |
| 823 | // handle // comment |
| 824 | else if (comment_state < 0) |
| 825 | { |
| 826 | switch (c) |
| 827 | { |
| 828 | case '\r': |
| 829 | case '\n': |
| 830 | comment_state = 0; |
| 831 | break; |
| 832 | default: |
| 833 | break; |
| 834 | } |
| 835 | } |
| 836 | // handle unknown |
| 837 | else |
| 838 | { |
| 839 | switch (c) |
| 840 | { |
| 841 | case '{': |
| 842 | return parseObject(source); |
| 843 | case '[': |
| 844 | return parseArray(source); |
| 845 | case '"': |
| 846 | return parseString(source); |
| 847 | case '-': |
| 848 | return parseNumber(source); |
| 849 | |
| 850 | case 'n': |
| 851 | complete("null",source); |
| 852 | return null; |
| 853 | case 't': |
| 854 | complete("true",source); |
| 855 | return Boolean.TRUE; |
| 856 | case 'f': |
| 857 | complete("false",source); |
| 858 | return Boolean.FALSE; |
| 859 | case 'u': |
| 860 | complete("undefined",source); |
| 861 | return null; |
| 862 | case 'N': |
| 863 | complete("NaN",source); |
| 864 | return null; |
| 865 | |
| 866 | case '/': |
| 867 | comment_state = 1; |
| 868 | break; |
| 869 | |
| 870 | default: |
| 871 | if (Character.isDigit(c)) |
| 872 | return parseNumber(source); |
| 873 | else if (Character.isWhitespace(c)) |
| 874 | break; |
| 875 | return handleUnknown(source,c); |
| 876 | } |
| 877 | } |
| 878 | source.next(); |
| 879 | } |
| 880 | |
| 881 | return null; |
| 882 | } |
| 883 | |
| 884 | protected Object handleUnknown(Source source, char c) |
| 885 | { |
| 886 | throw new IllegalStateException("unknown char '" + c + "'(" + (int)c + ") in " + source); |
| 887 | } |
| 888 | |
| 889 | protected Object parseObject(Source source) |
| 890 | { |
| 891 | if (source.next() != '{') |
| 892 | throw new IllegalStateException(); |
| 893 | Map<String, Object> map = newMap(); |
| 894 | |
| 895 | char next = seekTo("\"}",source); |
| 896 | |
| 897 | while (source.hasNext()) |
| 898 | { |
| 899 | if (next == '}') |
| 900 | { |
| 901 | source.next(); |
| 902 | break; |
| 903 | } |
| 904 | |
| 905 | String name = parseString(source); |
| 906 | seekTo(':',source); |
| 907 | source.next(); |
| 908 | |
| 909 | Object value = contextFor(name).parse(source); |
| 910 | map.put(name,value); |
| 911 | |
| 912 | seekTo(",}",source); |
| 913 | next = source.next(); |
| 914 | if (next == '}') |
| 915 | break; |
| 916 | else |
| 917 | next = seekTo("\"}",source); |
| 918 | } |
| 919 | |
| 920 | String xclassname = (String)map.get("x-class"); |
| 921 | if (xclassname != null) |
| 922 | { |
| 923 | Convertor c = getConvertorFor(xclassname); |
| 924 | if (c != null) |
| 925 | return c.fromJSON(map); |
| 926 | LOG.warn("No Convertor for x-class '{}'", xclassname); |
| 927 | } |
| 928 | |
| 929 | String classname = (String)map.get("class"); |
| 930 | if (classname != null) |
| 931 | { |
| 932 | try |
| 933 | { |
| 934 | Class c = Loader.loadClass(JSON.class,classname); |
| 935 | return convertTo(c,map); |
| 936 | } |
| 937 | catch (ClassNotFoundException e) |
| 938 | { |
| 939 | LOG.warn("No Class for '{}'", classname); |
| 940 | } |
| 941 | } |
| 942 | |
| 943 | return map; |
| 944 | } |
| 945 | |
| 946 | protected Object parseArray(Source source) |
| 947 | { |
| 948 | if (source.next() != '[') |
| 949 | throw new IllegalStateException(); |
| 950 | |
| 951 | int size = 0; |
| 952 | ArrayList list = null; |
| 953 | Object item = null; |
| 954 | boolean coma = true; |
| 955 | |
| 956 | while (source.hasNext()) |
| 957 | { |
| 958 | char c = source.peek(); |
| 959 | switch (c) |
| 960 | { |
| 961 | case ']': |
| 962 | source.next(); |
| 963 | switch (size) |
| 964 | { |
| 965 | case 0: |
| 966 | return newArray(0); |
| 967 | case 1: |
| 968 | Object array = newArray(1); |
| 969 | Array.set(array,0,item); |
| 970 | return array; |
| 971 | default: |
| 972 | return list.toArray(newArray(list.size())); |
| 973 | } |
| 974 | |
| 975 | case ',': |
| 976 | if (coma) |
| 977 | throw new IllegalStateException(); |
| 978 | coma = true; |
| 979 | source.next(); |
| 980 | break; |
| 981 | |
| 982 | default: |
| 983 | if (Character.isWhitespace(c)) |
| 984 | source.next(); |
| 985 | else |
| 986 | { |
| 987 | coma = false; |
| 988 | if (size++ == 0) |
| 989 | item = contextForArray().parse(source); |
| 990 | else if (list == null) |
| 991 | { |
| 992 | list = new ArrayList(); |
| 993 | list.add(item); |
| 994 | item = contextForArray().parse(source); |
| 995 | list.add(item); |
| 996 | item = null; |
| 997 | } |
| 998 | else |
| 999 | { |
| 1000 | item = contextForArray().parse(source); |
| 1001 | list.add(item); |
| 1002 | item = null; |
| 1003 | } |
| 1004 | } |
| 1005 | } |
| 1006 | |
| 1007 | } |
| 1008 | |
| 1009 | throw new IllegalStateException("unexpected end of array"); |
| 1010 | } |
| 1011 | |
| 1012 | protected String parseString(Source source) |
| 1013 | { |
| 1014 | if (source.next() != '"') |
| 1015 | throw new IllegalStateException(); |
| 1016 | |
| 1017 | boolean escape = false; |
| 1018 | |
| 1019 | StringBuilder b = null; |
| 1020 | final char[] scratch = source.scratchBuffer(); |
| 1021 | |
| 1022 | if (scratch != null) |
| 1023 | { |
| 1024 | int i = 0; |
| 1025 | while (source.hasNext()) |
| 1026 | { |
| 1027 | if (i >= scratch.length) |
| 1028 | { |
| 1029 | // we have filled the scratch buffer, so we must |
| 1030 | // use the StringBuffer for a large string |
| 1031 | b = new StringBuilder(scratch.length * 2); |
| 1032 | b.append(scratch,0,i); |
| 1033 | break; |
| 1034 | } |
| 1035 | |
| 1036 | char c = source.next(); |
| 1037 | |
| 1038 | if (escape) |
| 1039 | { |
| 1040 | escape = false; |
| 1041 | switch (c) |
| 1042 | { |
| 1043 | case '"': |
| 1044 | scratch[i++] = '"'; |
| 1045 | break; |
| 1046 | case '\\': |
| 1047 | scratch[i++] = '\\'; |
| 1048 | break; |
| 1049 | case '/': |
| 1050 | scratch[i++] = '/'; |
| 1051 | break; |
| 1052 | case 'b': |
| 1053 | scratch[i++] = '\b'; |
| 1054 | break; |
| 1055 | case 'f': |
| 1056 | scratch[i++] = '\f'; |
| 1057 | break; |
| 1058 | case 'n': |
| 1059 | scratch[i++] = '\n'; |
| 1060 | break; |
| 1061 | case 'r': |
| 1062 | scratch[i++] = '\r'; |
| 1063 | break; |
| 1064 | case 't': |
| 1065 | scratch[i++] = '\t'; |
| 1066 | break; |
| 1067 | case 'u': |
| 1068 | char uc = (char)((TypeUtil.convertHexDigit((byte)source.next()) << 12) + (TypeUtil.convertHexDigit((byte)source.next()) << 8) |
| 1069 | + (TypeUtil.convertHexDigit((byte)source.next()) << 4) + (TypeUtil.convertHexDigit((byte)source.next()))); |
| 1070 | scratch[i++] = uc; |
| 1071 | break; |
| 1072 | default: |
| 1073 | scratch[i++] = c; |
| 1074 | } |
| 1075 | } |
| 1076 | else if (c == '\\') |
| 1077 | { |
| 1078 | escape = true; |
| 1079 | } |
| 1080 | else if (c == '\"') |
| 1081 | { |
| 1082 | // Return string that fits within scratch buffer |
| 1083 | return toString(scratch,0,i); |
| 1084 | } |
| 1085 | else |
| 1086 | { |
| 1087 | scratch[i++] = c; |
| 1088 | } |
| 1089 | } |
| 1090 | |
| 1091 | // Missing end quote, but return string anyway ? |
| 1092 | if (b == null) |
| 1093 | return toString(scratch,0,i); |
| 1094 | } |
| 1095 | else |
| 1096 | b = new StringBuilder(getStringBufferSize()); |
| 1097 | |
| 1098 | // parse large string into string buffer |
| 1099 | final StringBuilder builder=b; |
| 1100 | while (source.hasNext()) |
| 1101 | { |
| 1102 | char c = source.next(); |
| 1103 | |
| 1104 | if (escape) |
| 1105 | { |
| 1106 | escape = false; |
| 1107 | switch (c) |
| 1108 | { |
| 1109 | case '"': |
| 1110 | builder.append('"'); |
| 1111 | break; |
| 1112 | case '\\': |
| 1113 | builder.append('\\'); |
| 1114 | break; |
| 1115 | case '/': |
| 1116 | builder.append('/'); |
| 1117 | break; |
| 1118 | case 'b': |
| 1119 | builder.append('\b'); |
| 1120 | break; |
| 1121 | case 'f': |
| 1122 | builder.append('\f'); |
| 1123 | break; |
| 1124 | case 'n': |
| 1125 | builder.append('\n'); |
| 1126 | break; |
| 1127 | case 'r': |
| 1128 | builder.append('\r'); |
| 1129 | break; |
| 1130 | case 't': |
| 1131 | builder.append('\t'); |
| 1132 | break; |
| 1133 | case 'u': |
| 1134 | char uc = (char)((TypeUtil.convertHexDigit((byte)source.next()) << 12) + (TypeUtil.convertHexDigit((byte)source.next()) << 8) |
| 1135 | + (TypeUtil.convertHexDigit((byte)source.next()) << 4) + (TypeUtil.convertHexDigit((byte)source.next()))); |
| 1136 | builder.append(uc); |
| 1137 | break; |
| 1138 | default: |
| 1139 | builder.append(c); |
| 1140 | } |
| 1141 | } |
| 1142 | else if (c == '\\') |
| 1143 | { |
| 1144 | escape = true; |
| 1145 | } |
| 1146 | else if (c == '\"') |
| 1147 | { |
| 1148 | break; |
| 1149 | } |
| 1150 | else |
| 1151 | { |
| 1152 | builder.append(c); |
| 1153 | } |
| 1154 | } |
| 1155 | return builder.toString(); |
| 1156 | } |
| 1157 | |
| 1158 | public Number parseNumber(Source source) |
| 1159 | { |
| 1160 | boolean minus = false; |
| 1161 | long number = 0; |
| 1162 | StringBuilder buffer = null; |
| 1163 | |
| 1164 | longLoop: while (source.hasNext()) |
| 1165 | { |
| 1166 | char c = source.peek(); |
| 1167 | switch (c) |
| 1168 | { |
| 1169 | case '0': |
| 1170 | case '1': |
| 1171 | case '2': |
| 1172 | case '3': |
| 1173 | case '4': |
| 1174 | case '5': |
| 1175 | case '6': |
| 1176 | case '7': |
| 1177 | case '8': |
| 1178 | case '9': |
| 1179 | number = number * 10 + (c - '0'); |
| 1180 | source.next(); |
| 1181 | break; |
| 1182 | |
| 1183 | case '-': |
| 1184 | case '+': |
| 1185 | if (number != 0) |
| 1186 | throw new IllegalStateException("bad number"); |
| 1187 | minus = true; |
| 1188 | source.next(); |
| 1189 | break; |
| 1190 | |
| 1191 | case '.': |
| 1192 | case 'e': |
| 1193 | case 'E': |
| 1194 | buffer = new StringBuilder(16); |
| 1195 | if (minus) |
| 1196 | buffer.append('-'); |
| 1197 | buffer.append(number); |
| 1198 | buffer.append(c); |
| 1199 | source.next(); |
| 1200 | break longLoop; |
| 1201 | |
| 1202 | default: |
| 1203 | break longLoop; |
| 1204 | } |
| 1205 | } |
| 1206 | |
| 1207 | if (buffer == null) |
| 1208 | return minus ? -1 * number : number; |
| 1209 | |
| 1210 | doubleLoop: while (source.hasNext()) |
| 1211 | { |
| 1212 | char c = source.peek(); |
| 1213 | switch (c) |
| 1214 | { |
| 1215 | case '0': |
| 1216 | case '1': |
| 1217 | case '2': |
| 1218 | case '3': |
| 1219 | case '4': |
| 1220 | case '5': |
| 1221 | case '6': |
| 1222 | case '7': |
| 1223 | case '8': |
| 1224 | case '9': |
| 1225 | case '-': |
| 1226 | case '.': |
| 1227 | case '+': |
| 1228 | case 'e': |
| 1229 | case 'E': |
| 1230 | buffer.append(c); |
| 1231 | source.next(); |
| 1232 | break; |
| 1233 | |
| 1234 | default: |
| 1235 | break doubleLoop; |
| 1236 | } |
| 1237 | } |
| 1238 | return new Double(buffer.toString()); |
| 1239 | |
| 1240 | } |
| 1241 | |
| 1242 | protected void seekTo(char seek, Source source) |
| 1243 | { |
| 1244 | while (source.hasNext()) |
| 1245 | { |
| 1246 | char c = source.peek(); |
| 1247 | if (c == seek) |
| 1248 | return; |
| 1249 | |
| 1250 | if (!Character.isWhitespace(c)) |
| 1251 | throw new IllegalStateException("Unexpected '" + c + " while seeking '" + seek + "'"); |
| 1252 | source.next(); |
| 1253 | } |
| 1254 | |
| 1255 | throw new IllegalStateException("Expected '" + seek + "'"); |
| 1256 | } |
| 1257 | |
| 1258 | protected char seekTo(String seek, Source source) |
| 1259 | { |
| 1260 | while (source.hasNext()) |
| 1261 | { |
| 1262 | char c = source.peek(); |
| 1263 | if (seek.indexOf(c) >= 0) |
| 1264 | { |
| 1265 | return c; |
| 1266 | } |
| 1267 | |
| 1268 | if (!Character.isWhitespace(c)) |
| 1269 | throw new IllegalStateException("Unexpected '" + c + "' while seeking one of '" + seek + "'"); |
| 1270 | source.next(); |
| 1271 | } |
| 1272 | |
| 1273 | throw new IllegalStateException("Expected one of '" + seek + "'"); |
| 1274 | } |
| 1275 | |
| 1276 | protected static void complete(String seek, Source source) |
| 1277 | { |
| 1278 | int i = 0; |
| 1279 | while (source.hasNext() && i < seek.length()) |
| 1280 | { |
| 1281 | char c = source.next(); |
| 1282 | if (c != seek.charAt(i++)) |
| 1283 | throw new IllegalStateException("Unexpected '" + c + " while seeking \"" + seek + "\""); |
| 1284 | } |
| 1285 | |
| 1286 | if (i < seek.length()) |
| 1287 | throw new IllegalStateException("Expected \"" + seek + "\""); |
| 1288 | } |
| 1289 | |
| 1290 | private final class ConvertableOutput implements Output |
| 1291 | { |
| 1292 | private final Appendable _buffer; |
| 1293 | char c = '{'; |
| 1294 | |
| 1295 | private ConvertableOutput(Appendable buffer) |
| 1296 | { |
| 1297 | _buffer = buffer; |
| 1298 | } |
| 1299 | |
| 1300 | public void complete() |
| 1301 | { |
| 1302 | try |
| 1303 | { |
| 1304 | if (c == '{') |
| 1305 | _buffer.append("{}"); |
| 1306 | else if (c != 0) |
| 1307 | _buffer.append("}"); |
| 1308 | } |
| 1309 | catch (IOException e) |
| 1310 | { |
| 1311 | throw new RuntimeException(e); |
| 1312 | } |
| 1313 | } |
| 1314 | |
| 1315 | public void add(Object obj) |
| 1316 | { |
| 1317 | if (c == 0) |
| 1318 | throw new IllegalStateException(); |
| 1319 | append(_buffer,obj); |
| 1320 | c = 0; |
| 1321 | } |
| 1322 | |
| 1323 | public void addClass(Class type) |
| 1324 | { |
| 1325 | try |
| 1326 | { |
| 1327 | if (c == 0) |
| 1328 | throw new IllegalStateException(); |
| 1329 | _buffer.append(c); |
| 1330 | _buffer.append("\"class\":"); |
| 1331 | append(_buffer,type.getName()); |
| 1332 | c = ','; |
| 1333 | } |
| 1334 | catch (IOException e) |
| 1335 | { |
| 1336 | throw new RuntimeException(e); |
| 1337 | } |
| 1338 | } |
| 1339 | |
| 1340 | public void add(String name, Object value) |
| 1341 | { |
| 1342 | try |
| 1343 | { |
| 1344 | if (c == 0) |
| 1345 | throw new IllegalStateException(); |
| 1346 | _buffer.append(c); |
| 1347 | QuotedStringTokenizer.quote(_buffer,name); |
| 1348 | _buffer.append(':'); |
| 1349 | append(_buffer,value); |
| 1350 | c = ','; |
| 1351 | } |
| 1352 | catch (IOException e) |
| 1353 | { |
| 1354 | throw new RuntimeException(e); |
| 1355 | } |
| 1356 | } |
| 1357 | |
| 1358 | public void add(String name, double value) |
| 1359 | { |
| 1360 | try |
| 1361 | { |
| 1362 | if (c == 0) |
| 1363 | throw new IllegalStateException(); |
| 1364 | _buffer.append(c); |
| 1365 | QuotedStringTokenizer.quote(_buffer,name); |
| 1366 | _buffer.append(':'); |
| 1367 | appendNumber(_buffer, value); |
| 1368 | c = ','; |
| 1369 | } |
| 1370 | catch (IOException e) |
| 1371 | { |
| 1372 | throw new RuntimeException(e); |
| 1373 | } |
| 1374 | } |
| 1375 | |
| 1376 | public void add(String name, long value) |
| 1377 | { |
| 1378 | try |
| 1379 | { |
| 1380 | if (c == 0) |
| 1381 | throw new IllegalStateException(); |
| 1382 | _buffer.append(c); |
| 1383 | QuotedStringTokenizer.quote(_buffer,name); |
| 1384 | _buffer.append(':'); |
| 1385 | appendNumber(_buffer, value); |
| 1386 | c = ','; |
| 1387 | } |
| 1388 | catch (IOException e) |
| 1389 | { |
| 1390 | throw new RuntimeException(e); |
| 1391 | } |
| 1392 | } |
| 1393 | |
| 1394 | public void add(String name, boolean value) |
| 1395 | { |
| 1396 | try |
| 1397 | { |
| 1398 | if (c == 0) |
| 1399 | throw new IllegalStateException(); |
| 1400 | _buffer.append(c); |
| 1401 | QuotedStringTokenizer.quote(_buffer,name); |
| 1402 | _buffer.append(':'); |
| 1403 | appendBoolean(_buffer,value?Boolean.TRUE:Boolean.FALSE); |
| 1404 | c = ','; |
| 1405 | } |
| 1406 | catch (IOException e) |
| 1407 | { |
| 1408 | throw new RuntimeException(e); |
| 1409 | } |
| 1410 | } |
| 1411 | } |
| 1412 | |
| 1413 | public interface Source |
| 1414 | { |
| 1415 | boolean hasNext(); |
| 1416 | |
| 1417 | char next(); |
| 1418 | |
| 1419 | char peek(); |
| 1420 | |
| 1421 | char[] scratchBuffer(); |
| 1422 | } |
| 1423 | |
| 1424 | public static class StringSource implements Source |
| 1425 | { |
| 1426 | private final String string; |
| 1427 | private int index; |
| 1428 | private char[] scratch; |
| 1429 | |
| 1430 | public StringSource(String s) |
| 1431 | { |
| 1432 | string = s; |
| 1433 | } |
| 1434 | |
| 1435 | public boolean hasNext() |
| 1436 | { |
| 1437 | if (index < string.length()) |
| 1438 | return true; |
| 1439 | scratch = null; |
| 1440 | return false; |
| 1441 | } |
| 1442 | |
| 1443 | public char next() |
| 1444 | { |
| 1445 | return string.charAt(index++); |
| 1446 | } |
| 1447 | |
| 1448 | public char peek() |
| 1449 | { |
| 1450 | return string.charAt(index); |
| 1451 | } |
| 1452 | |
| 1453 | @Override |
| 1454 | public String toString() |
| 1455 | { |
| 1456 | return string.substring(0,index) + "|||" + string.substring(index); |
| 1457 | } |
| 1458 | |
| 1459 | public char[] scratchBuffer() |
| 1460 | { |
| 1461 | if (scratch == null) |
| 1462 | scratch = new char[string.length()]; |
| 1463 | return scratch; |
| 1464 | } |
| 1465 | } |
| 1466 | |
| 1467 | public static class ReaderSource implements Source |
| 1468 | { |
| 1469 | private Reader _reader; |
| 1470 | private int _next = -1; |
| 1471 | private char[] scratch; |
| 1472 | |
| 1473 | public ReaderSource(Reader r) |
| 1474 | { |
| 1475 | _reader = r; |
| 1476 | } |
| 1477 | |
| 1478 | public void setReader(Reader reader) |
| 1479 | { |
| 1480 | _reader = reader; |
| 1481 | _next = -1; |
| 1482 | } |
| 1483 | |
| 1484 | public boolean hasNext() |
| 1485 | { |
| 1486 | getNext(); |
| 1487 | if (_next < 0) |
| 1488 | { |
| 1489 | scratch = null; |
| 1490 | return false; |
| 1491 | } |
| 1492 | return true; |
| 1493 | } |
| 1494 | |
| 1495 | public char next() |
| 1496 | { |
| 1497 | getNext(); |
| 1498 | char c = (char)_next; |
| 1499 | _next = -1; |
| 1500 | return c; |
| 1501 | } |
| 1502 | |
| 1503 | public char peek() |
| 1504 | { |
| 1505 | getNext(); |
| 1506 | return (char)_next; |
| 1507 | } |
| 1508 | |
| 1509 | private void getNext() |
| 1510 | { |
| 1511 | if (_next < 0) |
| 1512 | { |
| 1513 | try |
| 1514 | { |
| 1515 | _next = _reader.read(); |
| 1516 | } |
| 1517 | catch (IOException e) |
| 1518 | { |
| 1519 | throw new RuntimeException(e); |
| 1520 | } |
| 1521 | } |
| 1522 | } |
| 1523 | |
| 1524 | public char[] scratchBuffer() |
| 1525 | { |
| 1526 | if (scratch == null) |
| 1527 | scratch = new char[1024]; |
| 1528 | return scratch; |
| 1529 | } |
| 1530 | |
| 1531 | } |
| 1532 | |
| 1533 | /** |
| 1534 | * JSON Output class for use by {@link Convertible}. |
| 1535 | */ |
| 1536 | public interface Output |
| 1537 | { |
| 1538 | public void addClass(Class c); |
| 1539 | |
| 1540 | public void add(Object obj); |
| 1541 | |
| 1542 | public void add(String name, Object value); |
| 1543 | |
| 1544 | public void add(String name, double value); |
| 1545 | |
| 1546 | public void add(String name, long value); |
| 1547 | |
| 1548 | public void add(String name, boolean value); |
| 1549 | } |
| 1550 | |
| 1551 | /* ------------------------------------------------------------ */ |
| 1552 | /** |
| 1553 | * JSON Convertible object. Object can implement this interface in a similar |
| 1554 | * way to the {@link Externalizable} interface is used to allow classes to |
| 1555 | * provide their own serialization mechanism. |
| 1556 | * <p> |
| 1557 | * A JSON.Convertible object may be written to a JSONObject or initialized |
| 1558 | * from a Map of field names to values. |
| 1559 | * <p> |
| 1560 | * If the JSON is to be convertible back to an Object, then the method |
| 1561 | * {@link Output#addClass(Class)} must be called from within toJSON() |
| 1562 | * |
| 1563 | */ |
| 1564 | public interface Convertible |
| 1565 | { |
| 1566 | public void toJSON(Output out); |
| 1567 | |
| 1568 | public void fromJSON(Map object); |
| 1569 | } |
| 1570 | |
| 1571 | /** |
| 1572 | * Static JSON Convertor. |
| 1573 | * <p> |
| 1574 | * may be implemented to provide static convertors for objects that may be |
| 1575 | * registered with |
| 1576 | * {@link JSON#registerConvertor(Class, org.eclipse.jetty.util.ajax.JSON.Convertor)} |
| 1577 | * . These convertors are looked up by class, interface and super class by |
| 1578 | * {@link JSON#getConvertor(Class)}. Convertors should be used when the |
| 1579 | * classes to be converted cannot implement {@link Convertible} or |
| 1580 | * {@link Generator}. |
| 1581 | */ |
| 1582 | public interface Convertor |
| 1583 | { |
| 1584 | public void toJSON(Object obj, Output out); |
| 1585 | |
| 1586 | public Object fromJSON(Map object); |
| 1587 | } |
| 1588 | |
| 1589 | /** |
| 1590 | * JSON Generator. A class that can add it's JSON representation directly to |
| 1591 | * a StringBuffer. This is useful for object instances that are frequently |
| 1592 | * converted and wish to avoid multiple Conversions |
| 1593 | */ |
| 1594 | public interface Generator |
| 1595 | { |
| 1596 | public void addJSON(Appendable buffer); |
| 1597 | } |
| 1598 | |
| 1599 | /** |
| 1600 | * A Literal JSON generator A utility instance of {@link JSON.Generator} |
| 1601 | * that holds a pre-generated string on JSON text. |
| 1602 | */ |
| 1603 | public static class Literal implements Generator |
| 1604 | { |
| 1605 | private String _json; |
| 1606 | |
| 1607 | /** |
| 1608 | * Construct a literal JSON instance for use by |
| 1609 | * {@link JSON#toString(Object)}. If {@link Log#isDebugEnabled()} is |
| 1610 | * true, the JSON will be parsed to check validity |
| 1611 | * |
| 1612 | * @param json |
| 1613 | * A literal JSON string. |
| 1614 | */ |
| 1615 | public Literal(String json) |
| 1616 | { |
| 1617 | if (LOG.isDebugEnabled()) // TODO: Make this a configurable option on JSON instead! |
| 1618 | parse(json); |
| 1619 | _json = json; |
| 1620 | } |
| 1621 | |
| 1622 | @Override |
| 1623 | public String toString() |
| 1624 | { |
| 1625 | return _json; |
| 1626 | } |
| 1627 | |
| 1628 | public void addJSON(Appendable buffer) |
| 1629 | { |
| 1630 | try |
| 1631 | { |
| 1632 | buffer.append(_json); |
| 1633 | } |
| 1634 | catch(IOException e) |
| 1635 | { |
| 1636 | throw new RuntimeException(e); |
| 1637 | } |
| 1638 | } |
| 1639 | } |
| 1640 | } |