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| 1 | /* | ||
| 2 | * Copyright (c) 1996, 2006, Oracle and/or its affiliates. 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. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package java.lang.reflect; | ||
| 27 | |||
| 28 | import sun.reflect.FieldAccessor; | ||
| 29 | import sun.reflect.Reflection; | ||
| 30 | import sun.reflect.generics.repository.FieldRepository; | ||
| 31 | import sun.reflect.generics.factory.CoreReflectionFactory; | ||
| 32 | import sun.reflect.generics.factory.GenericsFactory; | ||
| 33 | import sun.reflect.generics.scope.ClassScope; | ||
| 34 | import java.lang.annotation.Annotation; | ||
| 35 | import java.util.Map; | ||
| 36 | import sun.reflect.annotation.AnnotationParser; | ||
| 37 | |||
| 38 | |||
| 39 | /** | ||
| 40 | * A {@code Field} provides information about, and dynamic access to, a | ||
| 41 | * single field of a class or an interface. The reflected field may | ||
| 42 | * be a class (static) field or an instance field. | ||
| 43 | * | ||
| 44 | * <p>A {@code Field} permits widening conversions to occur during a get or | ||
| 45 | * set access operation, but throws an {@code IllegalArgumentException} if a | ||
| 46 | * narrowing conversion would occur. | ||
| 47 | * | ||
| 48 | * @see Member | ||
| 49 | * @see java.lang.Class | ||
| 50 | * @see java.lang.Class#getFields() | ||
| 51 | * @see java.lang.Class#getField(String) | ||
| 52 | * @see java.lang.Class#getDeclaredFields() | ||
| 53 | * @see java.lang.Class#getDeclaredField(String) | ||
| 54 | * | ||
| 55 | * @author Kenneth Russell | ||
| 56 | * @author Nakul Saraiya | ||
| 57 | */ | ||
| 58 | public final | ||
| 59 | class Field extends AccessibleObject implements Member { | ||
| 60 | |||
| 61 | private Class<?> clazz; | ||
| 62 | private int slot; | ||
| 63 | // This is guaranteed to be interned by the VM in the 1.4 | ||
| 64 | // reflection implementation | ||
| 65 | private String name; | ||
| 66 | private Class<?> type; | ||
| 67 | private int modifiers; | ||
| 68 | // Generics and annotations support | ||
| 69 | private transient String signature; | ||
| 70 | // generic info repository; lazily initialized | ||
| 71 | private transient FieldRepository genericInfo; | ||
| 72 | private byte[] annotations; | ||
| 73 | // Cached field accessor created without override | ||
| 74 | private FieldAccessor fieldAccessor; | ||
| 75 | // Cached field accessor created with override | ||
| 76 | private FieldAccessor overrideFieldAccessor; | ||
| 77 | // For sharing of FieldAccessors. This branching structure is | ||
| 78 | // currently only two levels deep (i.e., one root Field and | ||
| 79 | // potentially many Field objects pointing to it.) | ||
| 80 | private Field root; | ||
| 81 | |||
| 82 | // Generics infrastructure | ||
| 83 | |||
| 84 | private String getGenericSignature() {return signature;} | ||
| 85 | |||
| 86 | // Accessor for factory | ||
| 87 | private GenericsFactory getFactory() { | ||
| 88 | Class<?> c = getDeclaringClass(); | ||
| 89 | // create scope and factory | ||
| 90 | return CoreReflectionFactory.make(c, ClassScope.make(c)); | ||
| 91 | } | ||
| 92 | |||
| 93 | // Accessor for generic info repository | ||
| 94 | private FieldRepository getGenericInfo() { | ||
| 95 | // lazily initialize repository if necessary | ||
| 96 | if (genericInfo == null) { | ||
| 97 | // create and cache generic info repository | ||
| 98 | genericInfo = FieldRepository.make(getGenericSignature(), | ||
| 99 | getFactory()); | ||
| 100 | } | ||
| 101 | return genericInfo; //return cached repository | ||
| 102 | } | ||
| 103 | |||
| 104 | |||
| 105 | /** | ||
| 106 | * Package-private constructor used by ReflectAccess to enable | ||
| 107 | * instantiation of these objects in Java code from the java.lang | ||
| 108 | * package via sun.reflect.LangReflectAccess. | ||
| 109 | */ | ||
| 110 | Field(Class<?> declaringClass, | ||
| 111 | String name, | ||
| 112 | Class<?> type, | ||
| 113 | int modifiers, | ||
| 114 | int slot, | ||
| 115 | String signature, | ||
| 116 | byte[] annotations) | ||
| 117 | { | ||
| 118 | this.clazz = declaringClass; | ||
| 119 | this.name = name; | ||
| 120 | this.type = type; | ||
| 121 | this.modifiers = modifiers; | ||
| 122 | this.slot = slot; | ||
| 123 | this.signature = signature; | ||
| 124 | this.annotations = annotations; | ||
| 125 | } | ||
| 126 | |||
| 127 | /** | ||
| 128 | * Package-private routine (exposed to java.lang.Class via | ||
| 129 | * ReflectAccess) which returns a copy of this Field. The copy's | ||
| 130 | * "root" field points to this Field. | ||
| 131 | */ | ||
| 132 | Field copy() { | ||
| 133 | // This routine enables sharing of FieldAccessor objects | ||
| 134 | // among Field objects which refer to the same underlying | ||
| 135 | // method in the VM. (All of this contortion is only necessary | ||
| 136 | // because of the "accessibility" bit in AccessibleObject, | ||
| 137 | // which implicitly requires that new java.lang.reflect | ||
| 138 | // objects be fabricated for each reflective call on Class | ||
| 139 | // objects.) | ||
| 140 | Field res = new Field(clazz, name, type, modifiers, slot, signature, annotations); | ||
| 141 | res.root = this; | ||
| 142 | // Might as well eagerly propagate this if already present | ||
| 143 | res.fieldAccessor = fieldAccessor; | ||
| 144 | res.overrideFieldAccessor = overrideFieldAccessor; | ||
| 145 | return res; | ||
| 146 | } | ||
| 147 | |||
| 148 | /** | ||
| 149 | * Returns the {@code Class} object representing the class or interface | ||
| 150 | * that declares the field represented by this {@code Field} object. | ||
| 151 | */ | ||
| 152 | public Class<?> getDeclaringClass() { | ||
| 153 | return clazz; | ||
| 154 | } | ||
| 155 | |||
| 156 | /** | ||
| 157 | * Returns the name of the field represented by this {@code Field} object. | ||
| 158 | */ | ||
| 159 | public String getName() { | ||
| 160 | return name; | ||
| 161 | } | ||
| 162 | |||
| 163 | /** | ||
| 164 | * Returns the Java language modifiers for the field represented | ||
| 165 | * by this {@code Field} object, as an integer. The {@code Modifier} class should | ||
| 166 | * be used to decode the modifiers. | ||
| 167 | * | ||
| 168 | * @see Modifier | ||
| 169 | */ | ||
| 170 | public int getModifiers() { | ||
| 171 | return modifiers; | ||
| 172 | } | ||
| 173 | |||
| 174 | /** | ||
| 175 | * Returns {@code true} if this field represents an element of | ||
| 176 | * an enumerated type; returns {@code false} otherwise. | ||
| 177 | * | ||
| 178 | * @return {@code true} if and only if this field represents an element of | ||
| 179 | * an enumerated type. | ||
| 180 | * @since 1.5 | ||
| 181 | */ | ||
| 182 | public boolean isEnumConstant() { | ||
| 183 | return (getModifiers() & Modifier.ENUM) != 0; | ||
| 184 | } | ||
| 185 | |||
| 186 | /** | ||
| 187 | * Returns {@code true} if this field is a synthetic | ||
| 188 | * field; returns {@code false} otherwise. | ||
| 189 | * | ||
| 190 | * @return true if and only if this field is a synthetic | ||
| 191 | * field as defined by the Java Language Specification. | ||
| 192 | * @since 1.5 | ||
| 193 | */ | ||
| 194 | public boolean isSynthetic() { | ||
| 195 | return Modifier.isSynthetic(getModifiers()); | ||
| 196 | } | ||
| 197 | |||
| 198 | /** | ||
| 199 | * Returns a {@code Class} object that identifies the | ||
| 200 | * declared type for the field represented by this | ||
| 201 | * {@code Field} object. | ||
| 202 | * | ||
| 203 | * @return a {@code Class} object identifying the declared | ||
| 204 | * type of the field represented by this object | ||
| 205 | */ | ||
| 206 | public Class<?> getType() { | ||
| 207 | return type; | ||
| 208 | } | ||
| 209 | |||
| 210 | /** | ||
| 211 | * Returns a {@code Type} object that represents the declared type for | ||
| 212 | * the field represented by this {@code Field} object. | ||
| 213 | * | ||
| 214 | * <p>If the {@code Type} is a parameterized type, the | ||
| 215 | * {@code Type} object returned must accurately reflect the | ||
| 216 | * actual type parameters used in the source code. | ||
| 217 | * | ||
| 218 | * <p>If the type of the underlying field is a type variable or a | ||
| 219 | * parameterized type, it is created. Otherwise, it is resolved. | ||
| 220 | * | ||
| 221 | * @return a {@code Type} object that represents the declared type for | ||
| 222 | * the field represented by this {@code Field} object | ||
| 223 | * @throws GenericSignatureFormatError if the generic field | ||
| 224 | * signature does not conform to the format specified in | ||
| 225 | * <cite>The Java™ Virtual Machine Specification</cite> | ||
| 226 | * @throws TypeNotPresentException if the generic type | ||
| 227 | * signature of the underlying field refers to a non-existent | ||
| 228 | * type declaration | ||
| 229 | * @throws MalformedParameterizedTypeException if the generic | ||
| 230 | * signature of the underlying field refers to a parameterized type | ||
| 231 | * that cannot be instantiated for any reason | ||
| 232 | * @since 1.5 | ||
| 233 | */ | ||
| 234 | public Type getGenericType() { | ||
| 235 | if (getGenericSignature() != null) | ||
| 236 | return getGenericInfo().getGenericType(); | ||
| 237 | else | ||
| 238 | return getType(); | ||
| 239 | } | ||
| 240 | |||
| 241 | |||
| 242 | /** | ||
| 243 | * Compares this {@code Field} against the specified object. Returns | ||
| 244 | * true if the objects are the same. Two {@code Field} objects are the same if | ||
| 245 | * they were declared by the same class and have the same name | ||
| 246 | * and type. | ||
| 247 | */ | ||
| 248 | public boolean equals(Object obj) { | ||
| 249 | if (obj != null && obj instanceof Field) { | ||
| 250 | Field other = (Field)obj; | ||
| 251 | return (getDeclaringClass() == other.getDeclaringClass()) | ||
| 252 | && (getName() == other.getName()) | ||
| 253 | && (getType() == other.getType()); | ||
| 254 | } | ||
| 255 | return false; | ||
| 256 | } | ||
| 257 | |||
| 258 | /** | ||
| 259 | * Returns a hashcode for this {@code Field}. This is computed as the | ||
| 260 | * exclusive-or of the hashcodes for the underlying field's | ||
| 261 | * declaring class name and its name. | ||
| 262 | */ | ||
| 263 | public int hashCode() { | ||
| 264 | return getDeclaringClass().getName().hashCode() ^ getName().hashCode(); | ||
| 265 | } | ||
| 266 | |||
| 267 | /** | ||
| 268 | * Returns a string describing this {@code Field}. The format is | ||
| 269 | * the access modifiers for the field, if any, followed | ||
| 270 | * by the field type, followed by a space, followed by | ||
| 271 | * the fully-qualified name of the class declaring the field, | ||
| 272 | * followed by a period, followed by the name of the field. | ||
| 273 | * For example: | ||
| 274 | * <pre> | ||
| 275 | * public static final int java.lang.Thread.MIN_PRIORITY | ||
| 276 | * private int java.io.FileDescriptor.fd | ||
| 277 | * </pre> | ||
| 278 | * | ||
| 279 | * <p>The modifiers are placed in canonical order as specified by | ||
| 280 | * "The Java Language Specification". This is {@code public}, | ||
| 281 | * {@code protected} or {@code private} first, and then other | ||
| 282 | * modifiers in the following order: {@code static}, {@code final}, | ||
| 283 | * {@code transient}, {@code volatile}. | ||
| 284 | */ | ||
| 285 | public String toString() { | ||
| 286 | int mod = getModifiers(); | ||
| 287 | return (((mod == 0) ? "" : (Modifier.toString(mod) + " ")) | ||
| 288 | + getTypeName(getType()) + " " | ||
| 289 | + getTypeName(getDeclaringClass()) + "." | ||
| 290 | + getName()); | ||
| 291 | } | ||
| 292 | |||
| 293 | /** | ||
| 294 | * Returns a string describing this {@code Field}, including | ||
| 295 | * its generic type. The format is the access modifiers for the | ||
| 296 | * field, if any, followed by the generic field type, followed by | ||
| 297 | * a space, followed by the fully-qualified name of the class | ||
| 298 | * declaring the field, followed by a period, followed by the name | ||
| 299 | * of the field. | ||
| 300 | * | ||
| 301 | * <p>The modifiers are placed in canonical order as specified by | ||
| 302 | * "The Java Language Specification". This is {@code public}, | ||
| 303 | * {@code protected} or {@code private} first, and then other | ||
| 304 | * modifiers in the following order: {@code static}, {@code final}, | ||
| 305 | * {@code transient}, {@code volatile}. | ||
| 306 | * | ||
| 307 | * @return a string describing this {@code Field}, including | ||
| 308 | * its generic type | ||
| 309 | * | ||
| 310 | * @since 1.5 | ||
| 311 | */ | ||
| 312 | public String toGenericString() { | ||
| 313 | int mod = getModifiers(); | ||
| 314 | Type fieldType = getGenericType(); | ||
| 315 | return (((mod == 0) ? "" : (Modifier.toString(mod) + " ")) | ||
| 316 | + ((fieldType instanceof Class) ? | ||
| 317 | getTypeName((Class)fieldType): fieldType.toString())+ " " | ||
| 318 | + getTypeName(getDeclaringClass()) + "." | ||
| 319 | + getName()); | ||
| 320 | } | ||
| 321 | |||
| 322 | /** | ||
| 323 | * Returns the value of the field represented by this {@code Field}, on | ||
| 324 | * the specified object. The value is automatically wrapped in an | ||
| 325 | * object if it has a primitive type. | ||
| 326 | * | ||
| 327 | * <p>The underlying field's value is obtained as follows: | ||
| 328 | * | ||
| 329 | * <p>If the underlying field is a static field, the {@code obj} argument | ||
| 330 | * is ignored; it may be null. | ||
| 331 | * | ||
| 332 | * <p>Otherwise, the underlying field is an instance field. If the | ||
| 333 | * specified {@code obj} argument is null, the method throws a | ||
| 334 | * {@code NullPointerException}. If the specified object is not an | ||
| 335 | * instance of the class or interface declaring the underlying | ||
| 336 | * field, the method throws an {@code IllegalArgumentException}. | ||
| 337 | * | ||
| 338 | * <p>If this {@code Field} object is enforcing Java language access control, and | ||
| 339 | * the underlying field is inaccessible, the method throws an | ||
| 340 | * {@code IllegalAccessException}. | ||
| 341 | * If the underlying field is static, the class that declared the | ||
| 342 | * field is initialized if it has not already been initialized. | ||
| 343 | * | ||
| 344 | * <p>Otherwise, the value is retrieved from the underlying instance | ||
| 345 | * or static field. If the field has a primitive type, the value | ||
| 346 | * is wrapped in an object before being returned, otherwise it is | ||
| 347 | * returned as is. | ||
| 348 | * | ||
| 349 | * <p>If the field is hidden in the type of {@code obj}, | ||
| 350 | * the field's value is obtained according to the preceding rules. | ||
| 351 | * | ||
| 352 | * @param obj object from which the represented field's value is | ||
| 353 | * to be extracted | ||
| 354 | * @return the value of the represented field in object | ||
| 355 | * {@code obj}; primitive values are wrapped in an appropriate | ||
| 356 | * object before being returned | ||
| 357 | * | ||
| 358 | * @exception IllegalAccessException if this {@code Field} object | ||
| 359 | * is enforcing Java language access control and the underlying | ||
| 360 | * field is inaccessible. | ||
| 361 | * @exception IllegalArgumentException if the specified object is not an | ||
| 362 | * instance of the class or interface declaring the underlying | ||
| 363 | * field (or a subclass or implementor thereof). | ||
| 364 | * @exception NullPointerException if the specified object is null | ||
| 365 | * and the field is an instance field. | ||
| 366 | * @exception ExceptionInInitializerError if the initialization provoked | ||
| 367 | * by this method fails. | ||
| 368 | */ | ||
| 369 | public Object get(Object obj) | ||
| 370 | throws IllegalArgumentException, IllegalAccessException | ||
| 371 | { | ||
| 372 | return getFieldAccessor(obj).get(obj); | ||
| 373 | } | ||
| 374 | |||
| 375 | /** | ||
| 376 | * Gets the value of a static or instance {@code boolean} field. | ||
| 377 | * | ||
| 378 | * @param obj the object to extract the {@code boolean} value | ||
| 379 | * from | ||
| 380 | * @return the value of the {@code boolean} field | ||
| 381 | * | ||
| 382 | * @exception IllegalAccessException if this {@code Field} object | ||
| 383 | * is enforcing Java language access control and the underlying | ||
| 384 | * field is inaccessible. | ||
| 385 | * @exception IllegalArgumentException if the specified object is not | ||
| 386 | * an instance of the class or interface declaring the | ||
| 387 | * underlying field (or a subclass or implementor | ||
| 388 | * thereof), or if the field value cannot be | ||
| 389 | * converted to the type {@code boolean} by a | ||
| 390 | * widening conversion. | ||
| 391 | * @exception NullPointerException if the specified object is null | ||
| 392 | * and the field is an instance field. | ||
| 393 | * @exception ExceptionInInitializerError if the initialization provoked | ||
| 394 | * by this method fails. | ||
| 395 | * @see Field#get | ||
| 396 | */ | ||
| 397 | public boolean getBoolean(Object obj) | ||
| 398 | throws IllegalArgumentException, IllegalAccessException | ||
| 399 | { | ||
| 400 | return getFieldAccessor(obj).getBoolean(obj); | ||
| 401 | } | ||
| 402 | |||
| 403 | /** | ||
| 404 | * Gets the value of a static or instance {@code byte} field. | ||
| 405 | * | ||
| 406 | * @param obj the object to extract the {@code byte} value | ||
| 407 | * from | ||
| 408 | * @return the value of the {@code byte} field | ||
| 409 | * | ||
| 410 | * @exception IllegalAccessException if this {@code Field} object | ||
| 411 | * is enforcing Java language access control and the underlying | ||
| 412 | * field is inaccessible. | ||
| 413 | * @exception IllegalArgumentException if the specified object is not | ||
| 414 | * an instance of the class or interface declaring the | ||
| 415 | * underlying field (or a subclass or implementor | ||
| 416 | * thereof), or if the field value cannot be | ||
| 417 | * converted to the type {@code byte} by a | ||
| 418 | * widening conversion. | ||
| 419 | * @exception NullPointerException if the specified object is null | ||
| 420 | * and the field is an instance field. | ||
| 421 | * @exception ExceptionInInitializerError if the initialization provoked | ||
| 422 | * by this method fails. | ||
| 423 | * @see Field#get | ||
| 424 | */ | ||
| 425 | public byte getByte(Object obj) | ||
| 426 | throws IllegalArgumentException, IllegalAccessException | ||
| 427 | { | ||
| 428 | return getFieldAccessor(obj).getByte(obj); | ||
| 429 | } | ||
| 430 | |||
| 431 | /** | ||
| 432 | * Gets the value of a static or instance field of type | ||
| 433 | * {@code char} or of another primitive type convertible to | ||
| 434 | * type {@code char} via a widening conversion. | ||
| 435 | * | ||
| 436 | * @param obj the object to extract the {@code char} value | ||
| 437 | * from | ||
| 438 | * @return the value of the field converted to type {@code char} | ||
| 439 | * | ||
| 440 | * @exception IllegalAccessException if this {@code Field} object | ||
| 441 | * is enforcing Java language access control and the underlying | ||
| 442 | * field is inaccessible. | ||
| 443 | * @exception IllegalArgumentException if the specified object is not | ||
| 444 | * an instance of the class or interface declaring the | ||
| 445 | * underlying field (or a subclass or implementor | ||
| 446 | * thereof), or if the field value cannot be | ||
| 447 | * converted to the type {@code char} by a | ||
| 448 | * widening conversion. | ||
| 449 | * @exception NullPointerException if the specified object is null | ||
| 450 | * and the field is an instance field. | ||
| 451 | * @exception ExceptionInInitializerError if the initialization provoked | ||
| 452 | * by this method fails. | ||
| 453 | * @see Field#get | ||
| 454 | */ | ||
| 455 | public char getChar(Object obj) | ||
| 456 | throws IllegalArgumentException, IllegalAccessException | ||
| 457 | { | ||
| 458 | return getFieldAccessor(obj).getChar(obj); | ||
| 459 | } | ||
| 460 | |||
| 461 | /** | ||
| 462 | * Gets the value of a static or instance field of type | ||
| 463 | * {@code short} or of another primitive type convertible to | ||
| 464 | * type {@code short} via a widening conversion. | ||
| 465 | * | ||
| 466 | * @param obj the object to extract the {@code short} value | ||
| 467 | * from | ||
| 468 | * @return the value of the field converted to type {@code short} | ||
| 469 | * | ||
| 470 | * @exception IllegalAccessException if this {@code Field} object | ||
| 471 | * is enforcing Java language access control and the underlying | ||
| 472 | * field is inaccessible. | ||
| 473 | * @exception IllegalArgumentException if the specified object is not | ||
| 474 | * an instance of the class or interface declaring the | ||
| 475 | * underlying field (or a subclass or implementor | ||
| 476 | * thereof), or if the field value cannot be | ||
| 477 | * converted to the type {@code short} by a | ||
| 478 | * widening conversion. | ||
| 479 | * @exception NullPointerException if the specified object is null | ||
| 480 | * and the field is an instance field. | ||
| 481 | * @exception ExceptionInInitializerError if the initialization provoked | ||
| 482 | * by this method fails. | ||
| 483 | * @see Field#get | ||
| 484 | */ | ||
| 485 | public short getShort(Object obj) | ||
| 486 | throws IllegalArgumentException, IllegalAccessException | ||
| 487 | { | ||
| 488 | return getFieldAccessor(obj).getShort(obj); | ||
| 489 | } | ||
| 490 | |||
| 491 | /** | ||
| 492 | * Gets the value of a static or instance field of type | ||
| 493 | * {@code int} or of another primitive type convertible to | ||
| 494 | * type {@code int} via a widening conversion. | ||
| 495 | * | ||
| 496 | * @param obj the object to extract the {@code int} value | ||
| 497 | * from | ||
| 498 | * @return the value of the field converted to type {@code int} | ||
| 499 | * | ||
| 500 | * @exception IllegalAccessException if this {@code Field} object | ||
| 501 | * is enforcing Java language access control and the underlying | ||
| 502 | * field is inaccessible. | ||
| 503 | * @exception IllegalArgumentException if the specified object is not | ||
| 504 | * an instance of the class or interface declaring the | ||
| 505 | * underlying field (or a subclass or implementor | ||
| 506 | * thereof), or if the field value cannot be | ||
| 507 | * converted to the type {@code int} by a | ||
| 508 | * widening conversion. | ||
| 509 | * @exception NullPointerException if the specified object is null | ||
| 510 | * and the field is an instance field. | ||
| 511 | * @exception ExceptionInInitializerError if the initialization provoked | ||
| 512 | * by this method fails. | ||
| 513 | * @see Field#get | ||
| 514 | */ | ||
| 515 | public int getInt(Object obj) | ||
| 516 | throws IllegalArgumentException, IllegalAccessException | ||
| 517 | { | ||
| 518 | return getFieldAccessor(obj).getInt(obj); | ||
| 519 | } | ||
| 520 | |||
| 521 | /** | ||
| 522 | * Gets the value of a static or instance field of type | ||
| 523 | * {@code long} or of another primitive type convertible to | ||
| 524 | * type {@code long} via a widening conversion. | ||
| 525 | * | ||
| 526 | * @param obj the object to extract the {@code long} value | ||
| 527 | * from | ||
| 528 | * @return the value of the field converted to type {@code long} | ||
| 529 | * | ||
| 530 | * @exception IllegalAccessException if this {@code Field} object | ||
| 531 | * is enforcing Java language access control and the underlying | ||
| 532 | * field is inaccessible. | ||
| 533 | * @exception IllegalArgumentException if the specified object is not | ||
| 534 | * an instance of the class or interface declaring the | ||
| 535 | * underlying field (or a subclass or implementor | ||
| 536 | * thereof), or if the field value cannot be | ||
| 537 | * converted to the type {@code long} by a | ||
| 538 | * widening conversion. | ||
| 539 | * @exception NullPointerException if the specified object is null | ||
| 540 | * and the field is an instance field. | ||
| 541 | * @exception ExceptionInInitializerError if the initialization provoked | ||
| 542 | * by this method fails. | ||
| 543 | * @see Field#get | ||
| 544 | */ | ||
| 545 | public long getLong(Object obj) | ||
| 546 | throws IllegalArgumentException, IllegalAccessException | ||
| 547 | { | ||
| 548 | return getFieldAccessor(obj).getLong(obj); | ||
| 549 | } | ||
| 550 | |||
| 551 | /** | ||
| 552 | * Gets the value of a static or instance field of type | ||
| 553 | * {@code float} or of another primitive type convertible to | ||
| 554 | * type {@code float} via a widening conversion. | ||
| 555 | * | ||
| 556 | * @param obj the object to extract the {@code float} value | ||
| 557 | * from | ||
| 558 | * @return the value of the field converted to type {@code float} | ||
| 559 | * | ||
| 560 | * @exception IllegalAccessException if this {@code Field} object | ||
| 561 | * is enforcing Java language access control and the underlying | ||
| 562 | * field is inaccessible. | ||
| 563 | * @exception IllegalArgumentException if the specified object is not | ||
| 564 | * an instance of the class or interface declaring the | ||
| 565 | * underlying field (or a subclass or implementor | ||
| 566 | * thereof), or if the field value cannot be | ||
| 567 | * converted to the type {@code float} by a | ||
| 568 | * widening conversion. | ||
| 569 | * @exception NullPointerException if the specified object is null | ||
| 570 | * and the field is an instance field. | ||
| 571 | * @exception ExceptionInInitializerError if the initialization provoked | ||
| 572 | * by this method fails. | ||
| 573 | * @see Field#get | ||
| 574 | */ | ||
| 575 | public float getFloat(Object obj) | ||
| 576 | throws IllegalArgumentException, IllegalAccessException | ||
| 577 | { | ||
| 578 | return getFieldAccessor(obj).getFloat(obj); | ||
| 579 | } | ||
| 580 | |||
| 581 | /** | ||
| 582 | * Gets the value of a static or instance field of type | ||
| 583 | * {@code double} or of another primitive type convertible to | ||
| 584 | * type {@code double} via a widening conversion. | ||
| 585 | * | ||
| 586 | * @param obj the object to extract the {@code double} value | ||
| 587 | * from | ||
| 588 | * @return the value of the field converted to type {@code double} | ||
| 589 | * | ||
| 590 | * @exception IllegalAccessException if this {@code Field} object | ||
| 591 | * is enforcing Java language access control and the underlying | ||
| 592 | * field is inaccessible. | ||
| 593 | * @exception IllegalArgumentException if the specified object is not | ||
| 594 | * an instance of the class or interface declaring the | ||
| 595 | * underlying field (or a subclass or implementor | ||
| 596 | * thereof), or if the field value cannot be | ||
| 597 | * converted to the type {@code double} by a | ||
| 598 | * widening conversion. | ||
| 599 | * @exception NullPointerException if the specified object is null | ||
| 600 | * and the field is an instance field. | ||
| 601 | * @exception ExceptionInInitializerError if the initialization provoked | ||
| 602 | * by this method fails. | ||
| 603 | * @see Field#get | ||
| 604 | */ | ||
| 605 | public double getDouble(Object obj) | ||
| 606 | throws IllegalArgumentException, IllegalAccessException | ||
| 607 | { | ||
| 608 | return getFieldAccessor(obj).getDouble(obj); | ||
| 609 | } | ||
| 610 | |||
| 611 | /** | ||
| 612 | * Sets the field represented by this {@code Field} object on the | ||
| 613 | * specified object argument to the specified new value. The new | ||
| 614 | * value is automatically unwrapped if the underlying field has a | ||
| 615 | * primitive type. | ||
| 616 | * | ||
| 617 | * <p>The operation proceeds as follows: | ||
| 618 | * | ||
| 619 | * <p>If the underlying field is static, the {@code obj} argument is | ||
| 620 | * ignored; it may be null. | ||
| 621 | * | ||
| 622 | * <p>Otherwise the underlying field is an instance field. If the | ||
| 623 | * specified object argument is null, the method throws a | ||
| 624 | * {@code NullPointerException}. If the specified object argument is not | ||
| 625 | * an instance of the class or interface declaring the underlying | ||
| 626 | * field, the method throws an {@code IllegalArgumentException}. | ||
| 627 | * | ||
| 628 | * <p>If this {@code Field} object is enforcing Java language access control, and | ||
| 629 | * the underlying field is inaccessible, the method throws an | ||
| 630 | * {@code IllegalAccessException}. | ||
| 631 | * | ||
| 632 | * <p>If the underlying field is final, the method throws an | ||
| 633 | * {@code IllegalAccessException} unless {@code setAccessible(true)} | ||
| 634 | * has succeeded for this {@code Field} object | ||
| 635 | * and the field is non-static. Setting a final field in this way | ||
| 636 | * is meaningful only during deserialization or reconstruction of | ||
| 637 | * instances of classes with blank final fields, before they are | ||
| 638 | * made available for access by other parts of a program. Use in | ||
| 639 | * any other context may have unpredictable effects, including cases | ||
| 640 | * in which other parts of a program continue to use the original | ||
| 641 | * value of this field. | ||
| 642 | * | ||
| 643 | * <p>If the underlying field is of a primitive type, an unwrapping | ||
| 644 | * conversion is attempted to convert the new value to a value of | ||
| 645 | * a primitive type. If this attempt fails, the method throws an | ||
| 646 | * {@code IllegalArgumentException}. | ||
| 647 | * | ||
| 648 | * <p>If, after possible unwrapping, the new value cannot be | ||
| 649 | * converted to the type of the underlying field by an identity or | ||
| 650 | * widening conversion, the method throws an | ||
| 651 | * {@code IllegalArgumentException}. | ||
| 652 | * | ||
| 653 | * <p>If the underlying field is static, the class that declared the | ||
| 654 | * field is initialized if it has not already been initialized. | ||
| 655 | * | ||
| 656 | * <p>The field is set to the possibly unwrapped and widened new value. | ||
| 657 | * | ||
| 658 | * <p>If the field is hidden in the type of {@code obj}, | ||
| 659 | * the field's value is set according to the preceding rules. | ||
| 660 | * | ||
| 661 | * @param obj the object whose field should be modified | ||
| 662 | * @param value the new value for the field of {@code obj} | ||
| 663 | * being modified | ||
| 664 | * | ||
| 665 | * @exception IllegalAccessException if this {@code Field} object | ||
| 666 | * is enforcing Java language access control and the underlying | ||
| 667 | * field is either inaccessible or final. | ||
| 668 | * @exception IllegalArgumentException if the specified object is not an | ||
| 669 | * instance of the class or interface declaring the underlying | ||
| 670 | * field (or a subclass or implementor thereof), | ||
| 671 | * or if an unwrapping conversion fails. | ||
| 672 | * @exception NullPointerException if the specified object is null | ||
| 673 | * and the field is an instance field. | ||
| 674 | * @exception ExceptionInInitializerError if the initialization provoked | ||
| 675 | * by this method fails. | ||
| 676 | */ | ||
| 677 | public void set(Object obj, Object value) | ||
| 678 | throws IllegalArgumentException, IllegalAccessException | ||
| 679 | { | ||
| 680 | getFieldAccessor(obj).set(obj, value); | ||
| 681 | } | ||
| 682 | |||
| 683 | /** | ||
| 684 | * Sets the value of a field as a {@code boolean} on the specified object. | ||
| 685 | * This method is equivalent to | ||
| 686 | * {@code set(obj, zObj)}, | ||
| 687 | * where {@code zObj} is a {@code Boolean} object and | ||
| 688 | * {@code zObj.booleanValue() == z}. | ||
| 689 | * | ||
| 690 | * @param obj the object whose field should be modified | ||
| 691 | * @param z the new value for the field of {@code obj} | ||
| 692 | * being modified | ||
| 693 | * | ||
| 694 | * @exception IllegalAccessException if this {@code Field} object | ||
| 695 | * is enforcing Java language access control and the underlying | ||
| 696 | * field is either inaccessible or final. | ||
| 697 | * @exception IllegalArgumentException if the specified object is not an | ||
| 698 | * instance of the class or interface declaring the underlying | ||
| 699 | * field (or a subclass or implementor thereof), | ||
| 700 | * or if an unwrapping conversion fails. | ||
| 701 | * @exception NullPointerException if the specified object is null | ||
| 702 | * and the field is an instance field. | ||
| 703 | * @exception ExceptionInInitializerError if the initialization provoked | ||
| 704 | * by this method fails. | ||
| 705 | * @see Field#set | ||
| 706 | */ | ||
| 707 | public void setBoolean(Object obj, boolean z) | ||
| 708 | throws IllegalArgumentException, IllegalAccessException | ||
| 709 | { | ||
| 710 | getFieldAccessor(obj).setBoolean(obj, z); | ||
| 711 | } | ||
| 712 | |||
| 713 | /** | ||
| 714 | * Sets the value of a field as a {@code byte} on the specified object. | ||
| 715 | * This method is equivalent to | ||
| 716 | * {@code set(obj, bObj)}, | ||
| 717 | * where {@code bObj} is a {@code Byte} object and | ||
| 718 | * {@code bObj.byteValue() == b}. | ||
| 719 | * | ||
| 720 | * @param obj the object whose field should be modified | ||
| 721 | * @param b the new value for the field of {@code obj} | ||
| 722 | * being modified | ||
| 723 | * | ||
| 724 | * @exception IllegalAccessException if this {@code Field} object | ||
| 725 | * is enforcing Java language access control and the underlying | ||
| 726 | * field is either inaccessible or final. | ||
| 727 | * @exception IllegalArgumentException if the specified object is not an | ||
| 728 | * instance of the class or interface declaring the underlying | ||
| 729 | * field (or a subclass or implementor thereof), | ||
| 730 | * or if an unwrapping conversion fails. | ||
| 731 | * @exception NullPointerException if the specified object is null | ||
| 732 | * and the field is an instance field. | ||
| 733 | * @exception ExceptionInInitializerError if the initialization provoked | ||
| 734 | * by this method fails. | ||
| 735 | * @see Field#set | ||
| 736 | */ | ||
| 737 | public void setByte(Object obj, byte b) | ||
| 738 | throws IllegalArgumentException, IllegalAccessException | ||
| 739 | { | ||
| 740 | getFieldAccessor(obj).setByte(obj, b); | ||
| 741 | } | ||
| 742 | |||
| 743 | /** | ||
| 744 | * Sets the value of a field as a {@code char} on the specified object. | ||
| 745 | * This method is equivalent to | ||
| 746 | * {@code set(obj, cObj)}, | ||
| 747 | * where {@code cObj} is a {@code Character} object and | ||
| 748 | * {@code cObj.charValue() == c}. | ||
| 749 | * | ||
| 750 | * @param obj the object whose field should be modified | ||
| 751 | * @param c the new value for the field of {@code obj} | ||
| 752 | * being modified | ||
| 753 | * | ||
| 754 | * @exception IllegalAccessException if this {@code Field} object | ||
| 755 | * is enforcing Java language access control and the underlying | ||
| 756 | * field is either inaccessible or final. | ||
| 757 | * @exception IllegalArgumentException if the specified object is not an | ||
| 758 | * instance of the class or interface declaring the underlying | ||
| 759 | * field (or a subclass or implementor thereof), | ||
| 760 | * or if an unwrapping conversion fails. | ||
| 761 | * @exception NullPointerException if the specified object is null | ||
| 762 | * and the field is an instance field. | ||
| 763 | * @exception ExceptionInInitializerError if the initialization provoked | ||
| 764 | * by this method fails. | ||
| 765 | * @see Field#set | ||
| 766 | */ | ||
| 767 | public void setChar(Object obj, char c) | ||
| 768 | throws IllegalArgumentException, IllegalAccessException | ||
| 769 | { | ||
| 770 | getFieldAccessor(obj).setChar(obj, c); | ||
| 771 | } | ||
| 772 | |||
| 773 | /** | ||
| 774 | * Sets the value of a field as a {@code short} on the specified object. | ||
| 775 | * This method is equivalent to | ||
| 776 | * {@code set(obj, sObj)}, | ||
| 777 | * where {@code sObj} is a {@code Short} object and | ||
| 778 | * {@code sObj.shortValue() == s}. | ||
| 779 | * | ||
| 780 | * @param obj the object whose field should be modified | ||
| 781 | * @param s the new value for the field of {@code obj} | ||
| 782 | * being modified | ||
| 783 | * | ||
| 784 | * @exception IllegalAccessException if this {@code Field} object | ||
| 785 | * is enforcing Java language access control and the underlying | ||
| 786 | * field is either inaccessible or final. | ||
| 787 | * @exception IllegalArgumentException if the specified object is not an | ||
| 788 | * instance of the class or interface declaring the underlying | ||
| 789 | * field (or a subclass or implementor thereof), | ||
| 790 | * or if an unwrapping conversion fails. | ||
| 791 | * @exception NullPointerException if the specified object is null | ||
| 792 | * and the field is an instance field. | ||
| 793 | * @exception ExceptionInInitializerError if the initialization provoked | ||
| 794 | * by this method fails. | ||
| 795 | * @see Field#set | ||
| 796 | */ | ||
| 797 | public void setShort(Object obj, short s) | ||
| 798 | throws IllegalArgumentException, IllegalAccessException | ||
| 799 | { | ||
| 800 | getFieldAccessor(obj).setShort(obj, s); | ||
| 801 | } | ||
| 802 | |||
| 803 | /** | ||
| 804 | * Sets the value of a field as an {@code int} on the specified object. | ||
| 805 | * This method is equivalent to | ||
| 806 | * {@code set(obj, iObj)}, | ||
| 807 | * where {@code iObj} is a {@code Integer} object and | ||
| 808 | * {@code iObj.intValue() == i}. | ||
| 809 | * | ||
| 810 | * @param obj the object whose field should be modified | ||
| 811 | * @param i the new value for the field of {@code obj} | ||
| 812 | * being modified | ||
| 813 | * | ||
| 814 | * @exception IllegalAccessException if this {@code Field} object | ||
| 815 | * is enforcing Java language access control and the underlying | ||
| 816 | * field is either inaccessible or final. | ||
| 817 | * @exception IllegalArgumentException if the specified object is not an | ||
| 818 | * instance of the class or interface declaring the underlying | ||
| 819 | * field (or a subclass or implementor thereof), | ||
| 820 | * or if an unwrapping conversion fails. | ||
| 821 | * @exception NullPointerException if the specified object is null | ||
| 822 | * and the field is an instance field. | ||
| 823 | * @exception ExceptionInInitializerError if the initialization provoked | ||
| 824 | * by this method fails. | ||
| 825 | * @see Field#set | ||
| 826 | */ | ||
| 827 | public void setInt(Object obj, int i) | ||
| 828 | throws IllegalArgumentException, IllegalAccessException | ||
| 829 | { | ||
| 830 | getFieldAccessor(obj).setInt(obj, i); | ||
| 831 | } | ||
| 832 | |||
| 833 | /** | ||
| 834 | * Sets the value of a field as a {@code long} on the specified object. | ||
| 835 | * This method is equivalent to | ||
| 836 | * {@code set(obj, lObj)}, | ||
| 837 | * where {@code lObj} is a {@code Long} object and | ||
| 838 | * {@code lObj.longValue() == l}. | ||
| 839 | * | ||
| 840 | * @param obj the object whose field should be modified | ||
| 841 | * @param l the new value for the field of {@code obj} | ||
| 842 | * being modified | ||
| 843 | * | ||
| 844 | * @exception IllegalAccessException if this {@code Field} object | ||
| 845 | * is enforcing Java language access control and the underlying | ||
| 846 | * field is either inaccessible or final. | ||
| 847 | * @exception IllegalArgumentException if the specified object is not an | ||
| 848 | * instance of the class or interface declaring the underlying | ||
| 849 | * field (or a subclass or implementor thereof), | ||
| 850 | * or if an unwrapping conversion fails. | ||
| 851 | * @exception NullPointerException if the specified object is null | ||
| 852 | * and the field is an instance field. | ||
| 853 | * @exception ExceptionInInitializerError if the initialization provoked | ||
| 854 | * by this method fails. | ||
| 855 | * @see Field#set | ||
| 856 | */ | ||
| 857 | public void setLong(Object obj, long l) | ||
| 858 | throws IllegalArgumentException, IllegalAccessException | ||
| 859 | { | ||
| 860 | getFieldAccessor(obj).setLong(obj, l); | ||
| 861 | } | ||
| 862 | |||
| 863 | /** | ||
| 864 | * Sets the value of a field as a {@code float} on the specified object. | ||
| 865 | * This method is equivalent to | ||
| 866 | * {@code set(obj, fObj)}, | ||
| 867 | * where {@code fObj} is a {@code Float} object and | ||
| 868 | * {@code fObj.floatValue() == f}. | ||
| 869 | * | ||
| 870 | * @param obj the object whose field should be modified | ||
| 871 | * @param f the new value for the field of {@code obj} | ||
| 872 | * being modified | ||
| 873 | * | ||
| 874 | * @exception IllegalAccessException if this {@code Field} object | ||
| 875 | * is enforcing Java language access control and the underlying | ||
| 876 | * field is either inaccessible or final. | ||
| 877 | * @exception IllegalArgumentException if the specified object is not an | ||
| 878 | * instance of the class or interface declaring the underlying | ||
| 879 | * field (or a subclass or implementor thereof), | ||
| 880 | * or if an unwrapping conversion fails. | ||
| 881 | * @exception NullPointerException if the specified object is null | ||
| 882 | * and the field is an instance field. | ||
| 883 | * @exception ExceptionInInitializerError if the initialization provoked | ||
| 884 | * by this method fails. | ||
| 885 | * @see Field#set | ||
| 886 | */ | ||
| 887 | public void setFloat(Object obj, float f) | ||
| 888 | throws IllegalArgumentException, IllegalAccessException | ||
| 889 | { | ||
| 890 | getFieldAccessor(obj).setFloat(obj, f); | ||
| 891 | } | ||
| 892 | |||
| 893 | /** | ||
| 894 | * Sets the value of a field as a {@code double} on the specified object. | ||
| 895 | * This method is equivalent to | ||
| 896 | * {@code set(obj, dObj)}, | ||
| 897 | * where {@code dObj} is a {@code Double} object and | ||
| 898 | * {@code dObj.doubleValue() == d}. | ||
| 899 | * | ||
| 900 | * @param obj the object whose field should be modified | ||
| 901 | * @param d the new value for the field of {@code obj} | ||
| 902 | * being modified | ||
| 903 | * | ||
| 904 | * @exception IllegalAccessException if this {@code Field} object | ||
| 905 | * is enforcing Java language access control and the underlying | ||
| 906 | * field is either inaccessible or final. | ||
| 907 | * @exception IllegalArgumentException if the specified object is not an | ||
| 908 | * instance of the class or interface declaring the underlying | ||
| 909 | * field (or a subclass or implementor thereof), | ||
| 910 | * or if an unwrapping conversion fails. | ||
| 911 | * @exception NullPointerException if the specified object is null | ||
| 912 | * and the field is an instance field. | ||
| 913 | * @exception ExceptionInInitializerError if the initialization provoked | ||
| 914 | * by this method fails. | ||
| 915 | * @see Field#set | ||
| 916 | */ | ||
| 917 | public void setDouble(Object obj, double d) | ||
| 918 | throws IllegalArgumentException, IllegalAccessException | ||
| 919 | { | ||
| 920 | getFieldAccessor(obj).setDouble(obj, d); | ||
| 921 | } | ||
| 922 | |||
| 923 | // Convenience routine which performs security checks | ||
| 924 | private FieldAccessor getFieldAccessor(Object obj) | ||
| 925 | throws IllegalAccessException | ||
| 926 | { | ||
| 927 | doSecurityCheck(obj); | ||
| 928 | boolean ov = override; | ||
| 929 | FieldAccessor a = (ov)? overrideFieldAccessor : fieldAccessor; | ||
| 930 | return (a != null)? a : acquireFieldAccessor(ov); | ||
| 931 | } | ||
| 932 | |||
| 933 | // NOTE that there is no synchronization used here. It is correct | ||
| 934 | // (though not efficient) to generate more than one FieldAccessor | ||
| 935 | // for a given Field. However, avoiding synchronization will | ||
| 936 | // probably make the implementation more scalable. | ||
| 937 | private FieldAccessor acquireFieldAccessor(boolean overrideFinalCheck) { | ||
| 938 | // First check to see if one has been created yet, and take it | ||
| 939 | // if so | ||
| 940 | FieldAccessor tmp = null; | ||
| 941 | if (root != null) tmp = root.getFieldAccessor(overrideFinalCheck); | ||
| 942 | if (tmp != null) { | ||
| 943 | if (overrideFinalCheck) | ||
| 944 | overrideFieldAccessor = tmp; | ||
| 945 | else | ||
| 946 | fieldAccessor = tmp; | ||
| 947 | } else { | ||
| 948 | // Otherwise fabricate one and propagate it up to the root | ||
| 949 | tmp = reflectionFactory.newFieldAccessor(this, overrideFinalCheck); | ||
| 950 | setFieldAccessor(tmp, overrideFinalCheck); | ||
| 951 | } | ||
| 952 | |||
| 953 | return tmp; | ||
| 954 | } | ||
| 955 | |||
| 956 | // Returns FieldAccessor for this Field object, not looking up | ||
| 957 | // the chain to the root | ||
| 958 | private FieldAccessor getFieldAccessor(boolean overrideFinalCheck) { | ||
| 959 | return (overrideFinalCheck)? overrideFieldAccessor : fieldAccessor; | ||
| 960 | } | ||
| 961 | |||
| 962 | // Sets the FieldAccessor for this Field object and | ||
| 963 | // (recursively) its root | ||
| 964 | private void setFieldAccessor(FieldAccessor accessor, boolean overrideFinalCheck) { | ||
| 965 | if (overrideFinalCheck) | ||
| 966 | overrideFieldAccessor = accessor; | ||
| 967 | else | ||
| 968 | fieldAccessor = accessor; | ||
| 969 | // Propagate up | ||
| 970 | if (root != null) { | ||
| 971 | root.setFieldAccessor(accessor, overrideFinalCheck); | ||
| 972 | } | ||
| 973 | } | ||
| 974 | |||
| 975 | // NOTE: be very careful if you change the stack depth of this | ||
| 976 | // routine. The depth of the "getCallerClass" call is hardwired so | ||
| 977 | // that the compiler can have an easier time if this gets inlined. | ||
| 978 | private void doSecurityCheck(Object obj) throws IllegalAccessException { | ||
| 979 | if (!override) { | ||
| 980 | if (!Reflection.quickCheckMemberAccess(clazz, modifiers)) { | ||
| 981 | Class<?> caller = Reflection.getCallerClass(4); | ||
| 982 | |||
| 983 | checkAccess(caller, clazz, obj, modifiers); | ||
| 984 | } | ||
| 985 | } | ||
| 986 | } | ||
| 987 | |||
| 988 | /* | ||
| 989 | * Utility routine to paper over array type names | ||
| 990 | */ | ||
| 991 | static String getTypeName(Class<?> type) { | ||
| 992 | if (type.isArray()) { | ||
| 993 | try { | ||
| 994 | Class<?> cl = type; | ||
| 995 | int dimensions = 0; | ||
| 996 | while (cl.isArray()) { | ||
| 997 | dimensions++; | ||
| 998 | cl = cl.getComponentType(); | ||
| 999 | } | ||
| 1000 | StringBuffer sb = new StringBuffer(); | ||
| 1001 | sb.append(cl.getName()); | ||
| 1002 | for (int i = 0; i < dimensions; i++) { | ||
| 1003 | sb.append("[]"); | ||
| 1004 | } | ||
| 1005 | return sb.toString(); | ||
| 1006 | } catch (Throwable e) { /*FALLTHRU*/ } | ||
| 1007 | } | ||
| 1008 | return type.getName(); | ||
| 1009 | } | ||
| 1010 | |||
| 1011 | /** | ||
| 1012 | * @throws NullPointerException {@inheritDoc} | ||
| 1013 | * @since 1.5 | ||
| 1014 | */ | ||
| 1015 | public <T extends Annotation> T getAnnotation(Class<T> annotationClass) { | ||
| 1016 | if (annotationClass == null) | ||
| 1017 | throw new NullPointerException(); | ||
| 1018 | |||
| 1019 | return (T) declaredAnnotations().get(annotationClass); | ||
| 1020 | } | ||
| 1021 | |||
| 1022 | /** | ||
| 1023 | * @since 1.5 | ||
| 1024 | */ | ||
| 1025 | public Annotation[] getDeclaredAnnotations() { | ||
| 1026 | return AnnotationParser.toArray(declaredAnnotations()); | ||
| 1027 | } | ||
| 1028 | |||
| 1029 | private transient Map<Class<? extends Annotation>, Annotation> declaredAnnotations; | ||
| 1030 | |||
| 1031 | private synchronized Map<Class<? extends Annotation>, Annotation> declaredAnnotations() { | ||
| 1032 | if (declaredAnnotations == null) { | ||
| 1033 | declaredAnnotations = AnnotationParser.parseAnnotations( | ||
| 1034 | annotations, sun.misc.SharedSecrets.getJavaLangAccess(). | ||
| 1035 | getConstantPool(getDeclaringClass()), | ||
| 1036 | getDeclaringClass()); | ||
| 1037 | } | ||
| 1038 | return declaredAnnotations; | ||
| 1039 | } | ||
| 1040 | } | ||