Tatu Saloranta | f15531c | 2011-12-22 23:00:40 -0800 | [diff] [blame] | 1 | /* Jackson JSON-processor. |
| 2 | * |
| 3 | * Copyright (c) 2007- Tatu Saloranta, tatu.saloranta@iki.fi |
| 4 | * |
| 5 | * Licensed under the License specified in file LICENSE, included with |
| 6 | * the source code and binary code bundles. |
| 7 | * You may not use this file except in compliance with the License. |
| 8 | * |
| 9 | * Unless required by applicable law or agreed to in writing, software |
| 10 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | * See the License for the specific language governing permissions and |
| 13 | * limitations under the License. |
| 14 | */ |
| 15 | package com.fasterxml.jackson.core; |
| 16 | |
| 17 | import java.io.*; |
| 18 | import java.lang.ref.SoftReference; |
| 19 | import java.net.URL; |
| 20 | |
| 21 | import com.fasterxml.jackson.core.format.InputAccessor; |
| 22 | import com.fasterxml.jackson.core.format.MatchStrength; |
| 23 | import com.fasterxml.jackson.core.io.*; |
Tatu | 0735190 | 2012-01-19 13:12:13 -0800 | [diff] [blame^] | 24 | import com.fasterxml.jackson.core.json.*; |
Tatu Saloranta | f15531c | 2011-12-22 23:00:40 -0800 | [diff] [blame] | 25 | import com.fasterxml.jackson.core.sym.BytesToNameCanonicalizer; |
| 26 | import com.fasterxml.jackson.core.sym.CharsToNameCanonicalizer; |
| 27 | import com.fasterxml.jackson.core.util.BufferRecycler; |
Tatu Saloranta | f15531c | 2011-12-22 23:00:40 -0800 | [diff] [blame] | 28 | |
| 29 | /** |
| 30 | * The main factory class of Jackson package, used to configure and |
| 31 | * construct reader (aka parser, {@link JsonParser}) |
| 32 | * and writer (aka generator, {@link JsonGenerator}) |
| 33 | * instances. |
| 34 | *<p> |
| 35 | * Factory instances are thread-safe and reusable after configuration |
| 36 | * (if any). Typically applications and services use only a single |
| 37 | * globally shared factory instance, unless they need differently |
| 38 | * configured factories. Factory reuse is important if efficiency matters; |
| 39 | * most recycling of expensive construct is done on per-factory basis. |
| 40 | *<p> |
| 41 | * Creation of a factory instance is a light-weight operation, |
| 42 | * and since there is no need for pluggable alternative implementations |
| 43 | * (as there is no "standard" JSON processor API to implement), |
| 44 | * the default constructor is used for constructing factory |
| 45 | * instances. |
| 46 | * |
| 47 | * @author Tatu Saloranta |
| 48 | */ |
| 49 | public class JsonFactory implements Versioned |
| 50 | { |
| 51 | /** |
| 52 | * Name used to identify JSON format |
| 53 | * (and returned by {@link #getFormatName()} |
| 54 | */ |
| 55 | public final static String FORMAT_NAME_JSON = "JSON"; |
| 56 | |
| 57 | /** |
Tatu | 0735190 | 2012-01-19 13:12:13 -0800 | [diff] [blame^] | 58 | * Bitfield (set of flags) of all factory features that are enabled by default. |
| 59 | */ |
| 60 | protected final static int DEFAULT_FACTORY_FEATURE_FLAGS = JsonFactory.Feature.collectDefaults(); |
| 61 | |
| 62 | /** |
Tatu Saloranta | f15531c | 2011-12-22 23:00:40 -0800 | [diff] [blame] | 63 | * Bitfield (set of flags) of all parser features that are enabled |
| 64 | * by default. |
| 65 | */ |
Tatu | 0735190 | 2012-01-19 13:12:13 -0800 | [diff] [blame^] | 66 | protected final static int DEFAULT_PARSER_FEATURE_FLAGS = JsonParser.Feature.collectDefaults(); |
| 67 | |
Tatu Saloranta | f15531c | 2011-12-22 23:00:40 -0800 | [diff] [blame] | 68 | /** |
| 69 | * Bitfield (set of flags) of all generator features that are enabled |
| 70 | * by default. |
| 71 | */ |
Tatu | 0735190 | 2012-01-19 13:12:13 -0800 | [diff] [blame^] | 72 | protected final static int DEFAULT_GENERATOR_FEATURE_FLAGS = JsonGenerator.Feature.collectDefaults(); |
Tatu Saloranta | f15531c | 2011-12-22 23:00:40 -0800 | [diff] [blame] | 73 | |
Tatu | 0735190 | 2012-01-19 13:12:13 -0800 | [diff] [blame^] | 74 | /** |
| 75 | * Enumeration that defines all on/off features that can only be |
| 76 | * changed for {@link JsonFactory}. |
| 77 | */ |
| 78 | public enum Feature { |
| 79 | |
| 80 | // // // Symbol handling (interning etc) |
| 81 | |
| 82 | /** |
| 83 | * Feature that determines whether JSON object field names are |
| 84 | * to be canonicalized using {@link String#intern} or not: |
| 85 | * if enabled, all field names will be intern()ed (and caller |
| 86 | * can count on this being true for all such names); if disabled, |
| 87 | * no intern()ing is done. There may still be basic |
| 88 | * canonicalization (that is, same String will be used to represent |
| 89 | * all identical object property names for a single document). |
| 90 | *<p> |
| 91 | * Note: this setting only has effect if |
| 92 | * {@link #CANONICALIZE_FIELD_NAMES} is true -- otherwise no |
| 93 | * canonicalization of any sort is done. |
| 94 | *<p> |
| 95 | * This setting is enabled by default. |
| 96 | */ |
| 97 | INTERN_FIELD_NAMES(true), |
| 98 | |
| 99 | /** |
| 100 | * Feature that determines whether JSON object field names are |
| 101 | * to be canonicalized (details of how canonicalization is done |
| 102 | * then further specified by |
| 103 | * {@link #INTERN_FIELD_NAMES}). |
| 104 | *<p> |
| 105 | * This setting is enabled by default. |
| 106 | */ |
| 107 | CANONICALIZE_FIELD_NAMES(true) |
| 108 | |
| 109 | ; |
| 110 | |
| 111 | /** |
| 112 | * Whether feature is enabled or disabled by default. |
| 113 | */ |
| 114 | private final boolean _defaultState; |
| 115 | |
| 116 | /** |
| 117 | * Method that calculates bit set (flags) of all features that |
| 118 | * are enabled by default. |
| 119 | */ |
| 120 | public static int collectDefaults() |
| 121 | { |
| 122 | int flags = 0; |
| 123 | for (Feature f : values()) { |
| 124 | if (f.enabledByDefault()) { |
| 125 | flags |= f.getMask(); |
| 126 | } |
| 127 | } |
| 128 | return flags; |
| 129 | } |
| 130 | |
| 131 | private Feature(boolean defaultState) |
| 132 | { |
| 133 | _defaultState = defaultState; |
| 134 | } |
| 135 | |
| 136 | public boolean enabledByDefault() { return _defaultState; } |
| 137 | |
| 138 | public boolean enabledIn(int flags) { return (flags & getMask()) != 0; } |
| 139 | |
| 140 | public int getMask() { return (1 << ordinal()); } |
| 141 | } |
Tatu Saloranta | f15531c | 2011-12-22 23:00:40 -0800 | [diff] [blame] | 142 | /* |
| 143 | /********************************************************** |
| 144 | /* Buffer, symbol table management |
| 145 | /********************************************************** |
| 146 | */ |
| 147 | |
| 148 | /** |
| 149 | * This <code>ThreadLocal</code> contains a {@link java.lang.ref.SoftRerefence} |
| 150 | * to a {@link BufferRecycler} used to provide a low-cost |
| 151 | * buffer recycling between reader and writer instances. |
| 152 | */ |
| 153 | final protected static ThreadLocal<SoftReference<BufferRecycler>> _recyclerRef |
| 154 | = new ThreadLocal<SoftReference<BufferRecycler>>(); |
| 155 | |
| 156 | /** |
| 157 | * Each factory comes equipped with a shared root symbol table. |
| 158 | * It should not be linked back to the original blueprint, to |
| 159 | * avoid contents from leaking between factories. |
| 160 | */ |
| 161 | protected CharsToNameCanonicalizer _rootCharSymbols = CharsToNameCanonicalizer.createRoot(); |
| 162 | |
| 163 | /** |
| 164 | * Alternative to the basic symbol table, some stream-based |
| 165 | * parsers use different name canonicalization method. |
| 166 | *<p> |
| 167 | * TODO: should clean up this; looks messy having 2 alternatives |
| 168 | * with not very clear differences. |
| 169 | */ |
| 170 | protected BytesToNameCanonicalizer _rootByteSymbols = BytesToNameCanonicalizer.createRoot(); |
| 171 | |
| 172 | /* |
| 173 | /********************************************************** |
| 174 | /* Configuration |
| 175 | /********************************************************** |
| 176 | */ |
| 177 | |
| 178 | /** |
| 179 | * Object that implements conversion functionality between |
| 180 | * Java objects and JSON content. For base JsonFactory implementation |
| 181 | * usually not set by default, but can be explicitly set. |
| 182 | * Sub-classes (like @link org.codehaus.jackson.map.MappingJsonFactory} |
| 183 | * usually provide an implementation. |
| 184 | */ |
| 185 | protected ObjectCodec _objectCodec; |
| 186 | |
| 187 | /** |
Tatu | 0735190 | 2012-01-19 13:12:13 -0800 | [diff] [blame^] | 188 | * Currently enabled factory features. |
| 189 | */ |
| 190 | protected int _factoryFeatures = DEFAULT_FACTORY_FEATURE_FLAGS; |
| 191 | |
| 192 | /** |
Tatu Saloranta | f15531c | 2011-12-22 23:00:40 -0800 | [diff] [blame] | 193 | * Currently enabled parser features. |
| 194 | */ |
| 195 | protected int _parserFeatures = DEFAULT_PARSER_FEATURE_FLAGS; |
| 196 | |
| 197 | /** |
| 198 | * Currently enabled generator features. |
| 199 | */ |
| 200 | protected int _generatorFeatures = DEFAULT_GENERATOR_FEATURE_FLAGS; |
| 201 | |
| 202 | /** |
| 203 | * Definition of custom character escapes to use for generators created |
| 204 | * by this factory, if any. If null, standard data format specific |
| 205 | * escapes are used. |
| 206 | */ |
| 207 | protected CharacterEscapes _characterEscapes; |
| 208 | |
| 209 | /** |
| 210 | * Optional helper object that may decorate input sources, to do |
| 211 | * additional processing on input during parsing. |
| 212 | */ |
| 213 | protected InputDecorator _inputDecorator; |
| 214 | |
| 215 | /** |
| 216 | * Optional helper object that may decorate output object, to do |
| 217 | * additional processing on output during content generation. |
| 218 | */ |
| 219 | protected OutputDecorator _outputDecorator; |
| 220 | |
| 221 | /* |
| 222 | /********************************************************** |
| 223 | /* Construction |
| 224 | /********************************************************** |
| 225 | */ |
| 226 | |
| 227 | /** |
| 228 | * Default constructor used to create factory instances. |
| 229 | * Creation of a factory instance is a light-weight operation, |
| 230 | * but it is still a good idea to reuse limited number of |
| 231 | * factory instances (and quite often just a single instance): |
| 232 | * factories are used as context for storing some reused |
| 233 | * processing objects (such as symbol tables parsers use) |
| 234 | * and this reuse only works within context of a single |
| 235 | * factory instance. |
| 236 | */ |
| 237 | public JsonFactory() { this(null); } |
| 238 | |
| 239 | public JsonFactory(ObjectCodec oc) { _objectCodec = oc; } |
| 240 | |
| 241 | /* |
| 242 | /********************************************************** |
| 243 | /* Format detection functionality (since 1.8) |
| 244 | /********************************************************** |
| 245 | */ |
| 246 | |
| 247 | /** |
| 248 | * Method that returns short textual id identifying format |
| 249 | * this factory supports. |
| 250 | *<p> |
| 251 | * Note: sub-classes should override this method; default |
| 252 | * implementation will return null for all sub-classes |
| 253 | */ |
| 254 | public String getFormatName() |
| 255 | { |
| 256 | /* Somewhat nasty check: since we can't make this abstract |
| 257 | * (due to backwards compatibility concerns), need to prevent |
| 258 | * format name "leakage" |
| 259 | */ |
| 260 | if (getClass() == JsonFactory.class) { |
| 261 | return FORMAT_NAME_JSON; |
| 262 | } |
| 263 | return null; |
| 264 | } |
| 265 | |
| 266 | public MatchStrength hasFormat(InputAccessor acc) throws IOException |
| 267 | { |
| 268 | // since we can't keep this abstract, only implement for "vanilla" instance |
| 269 | if (getClass() == JsonFactory.class) { |
| 270 | return hasJSONFormat(acc); |
| 271 | } |
| 272 | return null; |
| 273 | } |
| 274 | |
| 275 | protected MatchStrength hasJSONFormat(InputAccessor acc) throws IOException |
| 276 | { |
| 277 | return ByteSourceJsonBootstrapper.hasJSONFormat(acc); |
| 278 | } |
| 279 | |
| 280 | /* |
| 281 | /********************************************************** |
| 282 | /* Versioned |
| 283 | /********************************************************** |
| 284 | */ |
| 285 | |
| 286 | @Override |
| 287 | public Version version() { |
Tatu Saloranta | 5a1bd99 | 2011-12-28 23:18:23 -0800 | [diff] [blame] | 288 | return CoreVersion.instance.version(); |
Tatu Saloranta | f15531c | 2011-12-22 23:00:40 -0800 | [diff] [blame] | 289 | } |
| 290 | |
| 291 | /* |
| 292 | /********************************************************** |
Tatu | 0735190 | 2012-01-19 13:12:13 -0800 | [diff] [blame^] | 293 | /* Configuration, factory features |
Tatu Saloranta | f15531c | 2011-12-22 23:00:40 -0800 | [diff] [blame] | 294 | /********************************************************** |
| 295 | */ |
| 296 | |
| 297 | /** |
| 298 | * Method for enabling or disabling specified parser feature |
| 299 | * (check {@link JsonParser.Feature} for list of features) |
| 300 | */ |
Tatu | 0735190 | 2012-01-19 13:12:13 -0800 | [diff] [blame^] | 301 | public final JsonFactory configure(JsonFactory.Feature f, boolean state) { |
| 302 | return state ? enable(f) : disable(f); |
| 303 | } |
| 304 | |
| 305 | /** |
| 306 | * Method for enabling specified parser feature |
| 307 | * (check {@link JsonFactory.Feature} for list of features) |
| 308 | */ |
| 309 | public JsonFactory enable(JsonFactory.Feature f) { |
| 310 | _factoryFeatures |= f.getMask(); |
Tatu Saloranta | f15531c | 2011-12-22 23:00:40 -0800 | [diff] [blame] | 311 | return this; |
| 312 | } |
| 313 | |
| 314 | /** |
Tatu | 0735190 | 2012-01-19 13:12:13 -0800 | [diff] [blame^] | 315 | * Method for disabling specified parser features |
| 316 | * (check {@link JsonFactory.Feature} for list of features) |
| 317 | */ |
| 318 | public JsonFactory disable(JsonFactory.Feature f) { |
| 319 | _factoryFeatures &= ~f.getMask(); |
| 320 | return this; |
| 321 | } |
| 322 | |
| 323 | /** |
| 324 | * Checked whether specified parser feature is enabled. |
| 325 | */ |
| 326 | public final boolean isEnabled(JsonFactory.Feature f) { |
| 327 | return (_factoryFeatures & f.getMask()) != 0; |
| 328 | } |
| 329 | |
| 330 | /* |
| 331 | /********************************************************** |
| 332 | /* Configuration, parser configuration |
| 333 | /********************************************************** |
| 334 | */ |
| 335 | |
| 336 | /** |
| 337 | * Method for enabling or disabling specified parser feature |
| 338 | * (check {@link JsonParser.Feature} for list of features) |
| 339 | */ |
| 340 | public final JsonFactory configure(JsonParser.Feature f, boolean state) { |
| 341 | return state ? enable(f) : disable(f); |
| 342 | } |
| 343 | |
| 344 | /** |
Tatu Saloranta | f15531c | 2011-12-22 23:00:40 -0800 | [diff] [blame] | 345 | * Method for enabling specified parser feature |
| 346 | * (check {@link JsonParser.Feature} for list of features) |
| 347 | */ |
| 348 | public JsonFactory enable(JsonParser.Feature f) { |
| 349 | _parserFeatures |= f.getMask(); |
| 350 | return this; |
| 351 | } |
| 352 | |
| 353 | /** |
| 354 | * Method for disabling specified parser features |
| 355 | * (check {@link JsonParser.Feature} for list of features) |
| 356 | */ |
| 357 | public JsonFactory disable(JsonParser.Feature f) { |
| 358 | _parserFeatures &= ~f.getMask(); |
| 359 | return this; |
| 360 | } |
| 361 | |
| 362 | /** |
| 363 | * Checked whether specified parser feature is enabled. |
| 364 | */ |
| 365 | public final boolean isEnabled(JsonParser.Feature f) { |
| 366 | return (_parserFeatures & f.getMask()) != 0; |
| 367 | } |
| 368 | |
| 369 | /** |
| 370 | * Method for getting currently configured input decorator (if any; |
| 371 | * there is no default decorator). |
| 372 | */ |
| 373 | public InputDecorator getInputDecorator() { |
| 374 | return _inputDecorator; |
| 375 | } |
| 376 | |
| 377 | /** |
| 378 | * Method for overriding currently configured input decorator |
| 379 | */ |
| 380 | public JsonFactory setInputDecorator(InputDecorator d) { |
| 381 | _inputDecorator = d; |
| 382 | return this; |
| 383 | } |
| 384 | |
| 385 | /* |
| 386 | /********************************************************** |
| 387 | /* Configuration, generator settings |
| 388 | /********************************************************** |
| 389 | */ |
| 390 | |
| 391 | /** |
| 392 | * Method for enabling or disabling specified generator feature |
| 393 | * (check {@link JsonGenerator.Feature} for list of features) |
| 394 | */ |
| 395 | public final JsonFactory configure(JsonGenerator.Feature f, boolean state) { |
Tatu | 0735190 | 2012-01-19 13:12:13 -0800 | [diff] [blame^] | 396 | return state ? enable(f) : disable(f); |
Tatu Saloranta | f15531c | 2011-12-22 23:00:40 -0800 | [diff] [blame] | 397 | } |
| 398 | |
| 399 | |
| 400 | /** |
| 401 | * Method for enabling specified generator features |
| 402 | * (check {@link JsonGenerator.Feature} for list of features) |
| 403 | */ |
| 404 | public JsonFactory enable(JsonGenerator.Feature f) { |
| 405 | _generatorFeatures |= f.getMask(); |
| 406 | return this; |
| 407 | } |
| 408 | |
| 409 | /** |
| 410 | * Method for disabling specified generator feature |
| 411 | * (check {@link JsonGenerator.Feature} for list of features) |
| 412 | */ |
| 413 | public JsonFactory disable(JsonGenerator.Feature f) { |
| 414 | _generatorFeatures &= ~f.getMask(); |
| 415 | return this; |
| 416 | } |
| 417 | |
| 418 | /** |
| 419 | * Check whether specified generator feature is enabled. |
| 420 | */ |
| 421 | public final boolean isEnabled(JsonGenerator.Feature f) { |
| 422 | return (_generatorFeatures & f.getMask()) != 0; |
| 423 | } |
| 424 | |
| 425 | /** |
| 426 | * Method for accessing custom escapes factory uses for {@link JsonGenerator}s |
| 427 | * it creates. |
| 428 | */ |
| 429 | public CharacterEscapes getCharacterEscapes() { |
| 430 | return _characterEscapes; |
| 431 | } |
| 432 | |
| 433 | /** |
| 434 | * Method for defining custom escapes factory uses for {@link JsonGenerator}s |
| 435 | * it creates. |
| 436 | */ |
| 437 | public JsonFactory setCharacterEscapes(CharacterEscapes esc) { |
| 438 | _characterEscapes = esc; |
| 439 | return this; |
| 440 | } |
| 441 | |
| 442 | /** |
| 443 | * Method for getting currently configured output decorator (if any; |
| 444 | * there is no default decorator). |
| 445 | */ |
| 446 | public OutputDecorator getOutputDecorator() { |
| 447 | return _outputDecorator; |
| 448 | } |
| 449 | |
| 450 | /** |
| 451 | * Method for overriding currently configured output decorator |
| 452 | */ |
| 453 | public JsonFactory setOutputDecorator(OutputDecorator d) { |
| 454 | _outputDecorator = d; |
| 455 | return this; |
| 456 | } |
| 457 | |
| 458 | /* |
| 459 | /********************************************************** |
| 460 | /* Configuration, other |
| 461 | /********************************************************** |
| 462 | */ |
| 463 | |
| 464 | /** |
| 465 | * Method for associating a {@link ObjectCodec} (typically |
Tatu Saloranta | d77350e | 2011-12-22 23:13:13 -0800 | [diff] [blame] | 466 | * a <code>com.fasterxml.jackson.databind.ObjectMapper</code>) |
| 467 | * with this factory (and more importantly, parsers and generators |
Tatu Saloranta | f15531c | 2011-12-22 23:00:40 -0800 | [diff] [blame] | 468 | * it constructs). This is needed to use data-binding methods |
| 469 | * of {@link JsonParser} and {@link JsonGenerator} instances. |
| 470 | */ |
| 471 | public JsonFactory setCodec(ObjectCodec oc) { |
| 472 | _objectCodec = oc; |
| 473 | return this; |
| 474 | } |
| 475 | |
| 476 | public ObjectCodec getCodec() { return _objectCodec; } |
| 477 | |
| 478 | /* |
| 479 | /********************************************************** |
| 480 | /* Reader factories |
| 481 | /********************************************************** |
| 482 | */ |
| 483 | |
| 484 | /** |
| 485 | * Method for constructing JSON parser instance to parse |
| 486 | * contents of specified file. Encoding is auto-detected |
| 487 | * from contents according to JSON specification recommended |
| 488 | * mechanism. |
| 489 | *<p> |
| 490 | * Underlying input stream (needed for reading contents) |
| 491 | * will be <b>owned</b> (and managed, i.e. closed as need be) by |
| 492 | * the parser, since caller has no access to it. |
| 493 | * |
| 494 | * @param f File that contains JSON content to parse |
| 495 | */ |
| 496 | public JsonParser createJsonParser(File f) |
| 497 | throws IOException, JsonParseException |
| 498 | { |
| 499 | // true, since we create InputStream from File |
| 500 | IOContext ctxt = _createContext(f, true); |
| 501 | InputStream in = new FileInputStream(f); |
| 502 | // [JACKSON-512]: allow wrapping with InputDecorator |
| 503 | if (_inputDecorator != null) { |
| 504 | in = _inputDecorator.decorate(ctxt, in); |
| 505 | } |
| 506 | return _createJsonParser(in, ctxt); |
| 507 | } |
| 508 | |
| 509 | /** |
| 510 | * Method for constructing JSON parser instance to parse |
| 511 | * contents of resource reference by given URL. |
| 512 | * Encoding is auto-detected |
| 513 | * from contents according to JSON specification recommended |
| 514 | * mechanism. |
| 515 | *<p> |
| 516 | * Underlying input stream (needed for reading contents) |
| 517 | * will be <b>owned</b> (and managed, i.e. closed as need be) by |
| 518 | * the parser, since caller has no access to it. |
| 519 | * |
| 520 | * @param url URL pointing to resource that contains JSON content to parse |
| 521 | */ |
| 522 | public JsonParser createJsonParser(URL url) |
| 523 | throws IOException, JsonParseException |
| 524 | { |
| 525 | // true, since we create InputStream from URL |
| 526 | IOContext ctxt = _createContext(url, true); |
| 527 | InputStream in = _optimizedStreamFromURL(url); |
| 528 | // [JACKSON-512]: allow wrapping with InputDecorator |
| 529 | if (_inputDecorator != null) { |
| 530 | in = _inputDecorator.decorate(ctxt, in); |
| 531 | } |
| 532 | return _createJsonParser(in, ctxt); |
| 533 | } |
| 534 | |
| 535 | /** |
| 536 | * Method for constructing JSON parser instance to parse |
| 537 | * the contents accessed via specified input stream. |
| 538 | *<p> |
| 539 | * The input stream will <b>not be owned</b> by |
| 540 | * the parser, it will still be managed (i.e. closed if |
| 541 | * end-of-stream is reacher, or parser close method called) |
| 542 | * if (and only if) {@link com.fasterxml.jackson.core.JsonParser.Feature#AUTO_CLOSE_SOURCE} |
| 543 | * is enabled. |
| 544 | *<p> |
| 545 | * Note: no encoding argument is taken since it can always be |
| 546 | * auto-detected as suggested by Json RFC. |
| 547 | * |
| 548 | * @param in InputStream to use for reading JSON content to parse |
| 549 | */ |
| 550 | public JsonParser createJsonParser(InputStream in) |
| 551 | throws IOException, JsonParseException |
| 552 | { |
| 553 | IOContext ctxt = _createContext(in, false); |
| 554 | // [JACKSON-512]: allow wrapping with InputDecorator |
| 555 | if (_inputDecorator != null) { |
| 556 | in = _inputDecorator.decorate(ctxt, in); |
| 557 | } |
| 558 | return _createJsonParser(in, ctxt); |
| 559 | } |
| 560 | |
| 561 | /** |
| 562 | * Method for constructing parser for parsing |
| 563 | * the contents accessed via specified Reader. |
| 564 | <p> |
| 565 | * The read stream will <b>not be owned</b> by |
| 566 | * the parser, it will still be managed (i.e. closed if |
| 567 | * end-of-stream is reacher, or parser close method called) |
| 568 | * if (and only if) {@link com.fasterxml.jackson.core.JsonParser.Feature#AUTO_CLOSE_SOURCE} |
| 569 | * is enabled. |
| 570 | *<p> |
| 571 | * |
| 572 | * @param r Reader to use for reading JSON content to parse |
| 573 | */ |
| 574 | public JsonParser createJsonParser(Reader r) |
| 575 | throws IOException, JsonParseException |
| 576 | { |
| 577 | // false -> we do NOT own Reader (did not create it) |
| 578 | IOContext ctxt = _createContext(r, false); |
| 579 | // [JACKSON-512]: allow wrapping with InputDecorator |
| 580 | if (_inputDecorator != null) { |
| 581 | r = _inputDecorator.decorate(ctxt, r); |
| 582 | } |
| 583 | return _createJsonParser(r, ctxt); |
| 584 | } |
| 585 | |
| 586 | /** |
| 587 | * Method for constructing parser for parsing |
| 588 | * the contents of given byte array. |
| 589 | */ |
| 590 | public JsonParser createJsonParser(byte[] data) |
| 591 | throws IOException, JsonParseException |
| 592 | { |
| 593 | IOContext ctxt = _createContext(data, true); |
| 594 | // [JACKSON-512]: allow wrapping with InputDecorator |
| 595 | if (_inputDecorator != null) { |
| 596 | InputStream in = _inputDecorator.decorate(ctxt, data, 0, data.length); |
| 597 | if (in != null) { |
| 598 | return _createJsonParser(in, ctxt); |
| 599 | } |
| 600 | } |
| 601 | return _createJsonParser(data, 0, data.length, ctxt); |
| 602 | } |
| 603 | |
| 604 | /** |
| 605 | * Method for constructing parser for parsing |
| 606 | * the contents of given byte array. |
| 607 | * |
| 608 | * @param data Buffer that contains data to parse |
| 609 | * @param offset Offset of the first data byte within buffer |
| 610 | * @param len Length of contents to parse within buffer |
| 611 | */ |
| 612 | public JsonParser createJsonParser(byte[] data, int offset, int len) |
| 613 | throws IOException, JsonParseException |
| 614 | { |
| 615 | IOContext ctxt = _createContext(data, true); |
| 616 | // [JACKSON-512]: allow wrapping with InputDecorator |
| 617 | if (_inputDecorator != null) { |
| 618 | InputStream in = _inputDecorator.decorate(ctxt, data, offset, len); |
| 619 | if (in != null) { |
| 620 | return _createJsonParser(in, ctxt); |
| 621 | } |
| 622 | } |
| 623 | return _createJsonParser(data, offset, len, ctxt); |
| 624 | } |
| 625 | |
| 626 | /** |
| 627 | * Method for constructing parser for parsing |
| 628 | * contents of given String. |
| 629 | */ |
| 630 | public JsonParser createJsonParser(String content) |
| 631 | throws IOException, JsonParseException |
| 632 | { |
| 633 | Reader r = new StringReader(content); |
| 634 | // true -> we own the Reader (and must close); not a big deal |
| 635 | IOContext ctxt = _createContext(r, true); |
| 636 | // [JACKSON-512]: allow wrapping with InputDecorator |
| 637 | if (_inputDecorator != null) { |
| 638 | r = _inputDecorator.decorate(ctxt, r); |
| 639 | } |
| 640 | return _createJsonParser(r, ctxt); |
| 641 | } |
| 642 | |
| 643 | /* |
| 644 | /********************************************************** |
| 645 | /* Generator factories |
| 646 | /********************************************************** |
| 647 | */ |
| 648 | |
| 649 | /** |
| 650 | * Method for constructing JSON generator for writing JSON content |
| 651 | * using specified output stream. |
| 652 | * Encoding to use must be specified, and needs to be one of available |
| 653 | * types (as per JSON specification). |
| 654 | *<p> |
| 655 | * Underlying stream <b>is NOT owned</b> by the generator constructed, |
| 656 | * so that generator will NOT close the output stream when |
| 657 | * {@link JsonGenerator#close} is called (unless auto-closing |
| 658 | * feature, |
| 659 | * {@link com.fasterxml.jackson.core.JsonGenerator.Feature#AUTO_CLOSE_TARGET} |
| 660 | * is enabled). |
| 661 | * Using application needs to close it explicitly if this is the case. |
| 662 | *<p> |
| 663 | * Note: there are formats that use fixed encoding (like most binary data formats) |
| 664 | * and that ignore passed in encoding. |
| 665 | * |
| 666 | * @param out OutputStream to use for writing JSON content |
| 667 | * @param enc Character encoding to use |
| 668 | */ |
| 669 | public JsonGenerator createJsonGenerator(OutputStream out, JsonEncoding enc) |
| 670 | throws IOException |
| 671 | { |
| 672 | // false -> we won't manage the stream unless explicitly directed to |
| 673 | IOContext ctxt = _createContext(out, false); |
| 674 | ctxt.setEncoding(enc); |
| 675 | if (enc == JsonEncoding.UTF8) { |
| 676 | // [JACKSON-512]: allow wrapping with _outputDecorator |
| 677 | if (_outputDecorator != null) { |
| 678 | out = _outputDecorator.decorate(ctxt, out); |
| 679 | } |
| 680 | return _createUTF8JsonGenerator(out, ctxt); |
| 681 | } |
| 682 | Writer w = _createWriter(out, enc, ctxt); |
| 683 | // [JACKSON-512]: allow wrapping with _outputDecorator |
| 684 | if (_outputDecorator != null) { |
| 685 | w = _outputDecorator.decorate(ctxt, w); |
| 686 | } |
| 687 | return _createJsonGenerator(w, ctxt); |
| 688 | } |
| 689 | |
| 690 | /** |
| 691 | * Method for constructing JSON generator for writing JSON content |
| 692 | * using specified Writer. |
| 693 | *<p> |
| 694 | * Underlying stream <b>is NOT owned</b> by the generator constructed, |
| 695 | * so that generator will NOT close the Reader when |
| 696 | * {@link JsonGenerator#close} is called (unless auto-closing |
| 697 | * feature, |
| 698 | * {@link com.fasterxml.jackson.core.JsonGenerator.Feature#AUTO_CLOSE_TARGET} is enabled). |
| 699 | * Using application needs to close it explicitly. |
| 700 | * |
| 701 | * @param out Writer to use for writing JSON content |
| 702 | */ |
| 703 | public JsonGenerator createJsonGenerator(Writer out) |
| 704 | throws IOException |
| 705 | { |
| 706 | IOContext ctxt = _createContext(out, false); |
| 707 | // [JACKSON-512]: allow wrapping with _outputDecorator |
| 708 | if (_outputDecorator != null) { |
| 709 | out = _outputDecorator.decorate(ctxt, out); |
| 710 | } |
| 711 | return _createJsonGenerator(out, ctxt); |
| 712 | } |
| 713 | |
| 714 | /** |
| 715 | * Convenience method for constructing generator that uses default |
| 716 | * encoding of the format (UTF-8 for JSON and most other data formats). |
| 717 | *<p> |
| 718 | * Note: there are formats that use fixed encoding (like most binary data formats). |
| 719 | */ |
| 720 | public JsonGenerator createJsonGenerator(OutputStream out) throws IOException { |
| 721 | return createJsonGenerator(out, JsonEncoding.UTF8); |
| 722 | } |
| 723 | |
| 724 | /** |
| 725 | * Method for constructing JSON generator for writing JSON content |
| 726 | * to specified file, overwriting contents it might have (or creating |
| 727 | * it if such file does not yet exist). |
| 728 | * Encoding to use must be specified, and needs to be one of available |
| 729 | * types (as per JSON specification). |
| 730 | *<p> |
| 731 | * Underlying stream <b>is owned</b> by the generator constructed, |
| 732 | * i.e. generator will handle closing of file when |
| 733 | * {@link JsonGenerator#close} is called. |
| 734 | * |
| 735 | * @param f File to write contents to |
| 736 | * @param enc Character encoding to use |
| 737 | */ |
| 738 | public JsonGenerator createJsonGenerator(File f, JsonEncoding enc) |
| 739 | throws IOException |
| 740 | { |
| 741 | OutputStream out = new FileOutputStream(f); |
| 742 | // true -> yes, we have to manage the stream since we created it |
| 743 | IOContext ctxt = _createContext(out, true); |
| 744 | ctxt.setEncoding(enc); |
| 745 | if (enc == JsonEncoding.UTF8) { |
| 746 | // [JACKSON-512]: allow wrapping with _outputDecorator |
| 747 | if (_outputDecorator != null) { |
| 748 | out = _outputDecorator.decorate(ctxt, out); |
| 749 | } |
| 750 | return _createUTF8JsonGenerator(out, ctxt); |
| 751 | } |
| 752 | Writer w = _createWriter(out, enc, ctxt); |
| 753 | // [JACKSON-512]: allow wrapping with _outputDecorator |
| 754 | if (_outputDecorator != null) { |
| 755 | w = _outputDecorator.decorate(ctxt, w); |
| 756 | } |
| 757 | return _createJsonGenerator(w, ctxt); |
| 758 | } |
| 759 | |
| 760 | /* |
| 761 | /********************************************************** |
| 762 | /* Factory methods used by factory for creating parser instances, |
| 763 | /* overridable by sub-classes |
| 764 | /********************************************************** |
| 765 | */ |
| 766 | |
| 767 | /** |
| 768 | * Overridable factory method that actually instantiates desired parser |
| 769 | * given {@link InputStream} and context object. |
| 770 | *<p> |
| 771 | * This method is specifically designed to remain |
| 772 | * compatible between minor versions so that sub-classes can count |
| 773 | * on it being called as expected. That is, it is part of official |
| 774 | * interface from sub-class perspective, although not a public |
| 775 | * method available to users of factory implementations. |
| 776 | */ |
| 777 | protected JsonParser _createJsonParser(InputStream in, IOContext ctxt) |
| 778 | throws IOException, JsonParseException |
| 779 | { |
Tatu | 0735190 | 2012-01-19 13:12:13 -0800 | [diff] [blame^] | 780 | // As per [JACKSON-259], may want to fully disable canonicalization: |
Tatu Saloranta | f15531c | 2011-12-22 23:00:40 -0800 | [diff] [blame] | 781 | return new ByteSourceJsonBootstrapper(ctxt, in).constructParser(_parserFeatures, |
Tatu | 0735190 | 2012-01-19 13:12:13 -0800 | [diff] [blame^] | 782 | _objectCodec, _rootByteSymbols, _rootCharSymbols, |
| 783 | isEnabled(JsonFactory.Feature.CANONICALIZE_FIELD_NAMES), |
| 784 | isEnabled(JsonFactory.Feature.INTERN_FIELD_NAMES)); |
Tatu Saloranta | f15531c | 2011-12-22 23:00:40 -0800 | [diff] [blame] | 785 | } |
| 786 | |
| 787 | /** |
| 788 | * Overridable factory method that actually instantiates parser |
| 789 | * using given {@link Reader} object for reading content. |
| 790 | *<p> |
| 791 | * This method is specifically designed to remain |
| 792 | * compatible between minor versions so that sub-classes can count |
| 793 | * on it being called as expected. That is, it is part of official |
| 794 | * interface from sub-class perspective, although not a public |
| 795 | * method available to users of factory implementations. |
| 796 | */ |
| 797 | protected JsonParser _createJsonParser(Reader r, IOContext ctxt) |
| 798 | throws IOException, JsonParseException |
| 799 | { |
| 800 | return new ReaderBasedJsonParser(ctxt, _parserFeatures, r, _objectCodec, |
Tatu | 0735190 | 2012-01-19 13:12:13 -0800 | [diff] [blame^] | 801 | _rootCharSymbols.makeChild(isEnabled(JsonFactory.Feature.CANONICALIZE_FIELD_NAMES), |
| 802 | isEnabled(JsonFactory.Feature.INTERN_FIELD_NAMES))); |
Tatu Saloranta | f15531c | 2011-12-22 23:00:40 -0800 | [diff] [blame] | 803 | } |
| 804 | |
| 805 | /** |
| 806 | * Overridable factory method that actually instantiates parser |
| 807 | * using given {@link Reader} object for reading content |
| 808 | * passed as raw byte array. |
| 809 | *<p> |
| 810 | * This method is specifically designed to remain |
| 811 | * compatible between minor versions so that sub-classes can count |
| 812 | * on it being called as expected. That is, it is part of official |
| 813 | * interface from sub-class perspective, although not a public |
| 814 | * method available to users of factory implementations. |
| 815 | */ |
| 816 | protected JsonParser _createJsonParser(byte[] data, int offset, int len, IOContext ctxt) |
| 817 | throws IOException, JsonParseException |
| 818 | { |
| 819 | return new ByteSourceJsonBootstrapper(ctxt, data, offset, len).constructParser(_parserFeatures, |
Tatu | 0735190 | 2012-01-19 13:12:13 -0800 | [diff] [blame^] | 820 | _objectCodec, _rootByteSymbols, _rootCharSymbols, |
| 821 | isEnabled(JsonFactory.Feature.CANONICALIZE_FIELD_NAMES), |
| 822 | isEnabled(JsonFactory.Feature.INTERN_FIELD_NAMES)); |
Tatu Saloranta | f15531c | 2011-12-22 23:00:40 -0800 | [diff] [blame] | 823 | } |
| 824 | |
| 825 | /* |
| 826 | /********************************************************** |
| 827 | /* Factory methods used by factory for creating generator instances, |
| 828 | /* overridable by sub-classes |
| 829 | /********************************************************** |
| 830 | */ |
| 831 | |
| 832 | /** |
| 833 | * Overridable factory method that actually instantiates generator for |
| 834 | * given {@link Writer} and context object. |
| 835 | *<p> |
| 836 | * This method is specifically designed to remain |
| 837 | * compatible between minor versions so that sub-classes can count |
| 838 | * on it being called as expected. That is, it is part of official |
| 839 | * interface from sub-class perspective, although not a public |
| 840 | * method available to users of factory implementations. |
| 841 | */ |
| 842 | protected JsonGenerator _createJsonGenerator(Writer out, IOContext ctxt) |
| 843 | throws IOException |
| 844 | { |
| 845 | WriterBasedJsonGenerator gen = new WriterBasedJsonGenerator(ctxt, _generatorFeatures, _objectCodec, out); |
| 846 | if (_characterEscapes != null) { |
| 847 | gen.setCharacterEscapes(_characterEscapes); |
| 848 | } |
| 849 | return gen; |
| 850 | } |
| 851 | |
| 852 | /** |
| 853 | * Overridable factory method that actually instantiates generator for |
| 854 | * given {@link OutputStream} and context object, using UTF-8 encoding. |
| 855 | *<p> |
| 856 | * This method is specifically designed to remain |
| 857 | * compatible between minor versions so that sub-classes can count |
| 858 | * on it being called as expected. That is, it is part of official |
| 859 | * interface from sub-class perspective, although not a public |
| 860 | * method available to users of factory implementations. |
| 861 | */ |
| 862 | protected JsonGenerator _createUTF8JsonGenerator(OutputStream out, IOContext ctxt) |
| 863 | throws IOException |
| 864 | { |
| 865 | UTF8JsonGenerator gen = new UTF8JsonGenerator(ctxt, _generatorFeatures, _objectCodec, out); |
| 866 | if (_characterEscapes != null) { |
| 867 | gen.setCharacterEscapes(_characterEscapes); |
| 868 | } |
| 869 | return gen; |
| 870 | } |
| 871 | |
| 872 | protected Writer _createWriter(OutputStream out, JsonEncoding enc, IOContext ctxt) throws IOException |
| 873 | { |
| 874 | // note: this should not get called any more (caller checks, dispatches) |
| 875 | if (enc == JsonEncoding.UTF8) { // We have optimized writer for UTF-8 |
| 876 | return new UTF8Writer(ctxt, out); |
| 877 | } |
| 878 | // not optimal, but should do unless we really care about UTF-16/32 encoding speed |
| 879 | return new OutputStreamWriter(out, enc.getJavaName()); |
| 880 | } |
| 881 | |
| 882 | /* |
| 883 | /********************************************************** |
| 884 | /* Internal factory methods, other |
| 885 | /********************************************************** |
| 886 | */ |
| 887 | |
| 888 | /** |
| 889 | * Overridable factory method that actually instantiates desired |
| 890 | * context object. |
| 891 | */ |
| 892 | protected IOContext _createContext(Object srcRef, boolean resourceManaged) |
| 893 | { |
| 894 | return new IOContext(_getBufferRecycler(), srcRef, resourceManaged); |
| 895 | } |
| 896 | |
| 897 | /** |
| 898 | * Method used by factory to create buffer recycler instances |
| 899 | * for parsers and generators. |
| 900 | *<p> |
| 901 | * Note: only public to give access for <code>ObjectMapper</code> |
| 902 | */ |
| 903 | public BufferRecycler _getBufferRecycler() |
| 904 | { |
| 905 | SoftReference<BufferRecycler> ref = _recyclerRef.get(); |
| 906 | BufferRecycler br = (ref == null) ? null : ref.get(); |
| 907 | |
| 908 | if (br == null) { |
| 909 | br = new BufferRecycler(); |
| 910 | _recyclerRef.set(new SoftReference<BufferRecycler>(br)); |
| 911 | } |
| 912 | return br; |
| 913 | } |
| 914 | |
| 915 | /** |
| 916 | * Helper methods used for constructing an optimal stream for |
| 917 | * parsers to use, when input is to be read from an URL. |
| 918 | * This helps when reading file content via URL. |
| 919 | */ |
| 920 | protected InputStream _optimizedStreamFromURL(URL url) |
| 921 | throws IOException |
| 922 | { |
| 923 | if ("file".equals(url.getProtocol())) { |
| 924 | /* Can not do this if the path refers |
| 925 | * to a network drive on windows. This fixes the problem; |
| 926 | * might not be needed on all platforms (NFS?), but should not |
| 927 | * matter a lot: performance penalty of extra wrapping is more |
| 928 | * relevant when accessing local file system. |
| 929 | */ |
| 930 | String host = url.getHost(); |
| 931 | if (host == null || host.length() == 0) { |
| 932 | return new FileInputStream(url.getPath()); |
| 933 | } |
| 934 | } |
| 935 | return url.openStream(); |
| 936 | } |
| 937 | } |