1.1 --- a/emul/mini/src/main/java/java/lang/reflect/Field.java Tue Feb 26 14:55:55 2013 +0100
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,953 +0,0 @@
1.4 -/*
1.5 - * Copyright (c) 1996, 2006, Oracle and/or its affiliates. All rights reserved.
1.6 - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 - *
1.8 - * This code is free software; you can redistribute it and/or modify it
1.9 - * under the terms of the GNU General Public License version 2 only, as
1.10 - * published by the Free Software Foundation. Oracle designates this
1.11 - * particular file as subject to the "Classpath" exception as provided
1.12 - * by Oracle in the LICENSE file that accompanied this code.
1.13 - *
1.14 - * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 - * version 2 for more details (a copy is included in the LICENSE file that
1.18 - * accompanied this code).
1.19 - *
1.20 - * You should have received a copy of the GNU General Public License version
1.21 - * 2 along with this work; if not, write to the Free Software Foundation,
1.22 - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 - *
1.24 - * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 - * or visit www.oracle.com if you need additional information or have any
1.26 - * questions.
1.27 - */
1.28 -
1.29 -package java.lang.reflect;
1.30 -
1.31 -import java.lang.annotation.Annotation;
1.32 -
1.33 -
1.34 -/**
1.35 - * A {@code Field} provides information about, and dynamic access to, a
1.36 - * single field of a class or an interface. The reflected field may
1.37 - * be a class (static) field or an instance field.
1.38 - *
1.39 - * <p>A {@code Field} permits widening conversions to occur during a get or
1.40 - * set access operation, but throws an {@code IllegalArgumentException} if a
1.41 - * narrowing conversion would occur.
1.42 - *
1.43 - * @see Member
1.44 - * @see java.lang.Class
1.45 - * @see java.lang.Class#getFields()
1.46 - * @see java.lang.Class#getField(String)
1.47 - * @see java.lang.Class#getDeclaredFields()
1.48 - * @see java.lang.Class#getDeclaredField(String)
1.49 - *
1.50 - * @author Kenneth Russell
1.51 - * @author Nakul Saraiya
1.52 - */
1.53 -public final
1.54 -class Field extends AccessibleObject implements Member {
1.55 -
1.56 - private Class<?> clazz;
1.57 - private int slot;
1.58 - // This is guaranteed to be interned by the VM in the 1.4
1.59 - // reflection implementation
1.60 - private String name;
1.61 - private Class<?> type;
1.62 - private int modifiers;
1.63 - // Generics and annotations support
1.64 - private transient String signature;
1.65 - private byte[] annotations;
1.66 - // For sharing of FieldAccessors. This branching structure is
1.67 - // currently only two levels deep (i.e., one root Field and
1.68 - // potentially many Field objects pointing to it.)
1.69 - private Field root;
1.70 -
1.71 - // Generics infrastructure
1.72 -
1.73 - private String getGenericSignature() {return signature;}
1.74 -
1.75 -
1.76 - /**
1.77 - * Package-private constructor used by ReflectAccess to enable
1.78 - * instantiation of these objects in Java code from the java.lang
1.79 - * package via sun.reflect.LangReflectAccess.
1.80 - */
1.81 - Field(Class<?> declaringClass,
1.82 - String name,
1.83 - Class<?> type,
1.84 - int modifiers,
1.85 - int slot,
1.86 - String signature,
1.87 - byte[] annotations)
1.88 - {
1.89 - this.clazz = declaringClass;
1.90 - this.name = name;
1.91 - this.type = type;
1.92 - this.modifiers = modifiers;
1.93 - this.slot = slot;
1.94 - this.signature = signature;
1.95 - this.annotations = annotations;
1.96 - }
1.97 -
1.98 - /**
1.99 - * Package-private routine (exposed to java.lang.Class via
1.100 - * ReflectAccess) which returns a copy of this Field. The copy's
1.101 - * "root" field points to this Field.
1.102 - */
1.103 - Field copy() {
1.104 - // This routine enables sharing of FieldAccessor objects
1.105 - // among Field objects which refer to the same underlying
1.106 - // method in the VM. (All of this contortion is only necessary
1.107 - // because of the "accessibility" bit in AccessibleObject,
1.108 - // which implicitly requires that new java.lang.reflect
1.109 - // objects be fabricated for each reflective call on Class
1.110 - // objects.)
1.111 - Field res = new Field(clazz, name, type, modifiers, slot, signature, annotations);
1.112 - res.root = this;
1.113 - return res;
1.114 - }
1.115 -
1.116 - /**
1.117 - * Returns the {@code Class} object representing the class or interface
1.118 - * that declares the field represented by this {@code Field} object.
1.119 - */
1.120 - public Class<?> getDeclaringClass() {
1.121 - return clazz;
1.122 - }
1.123 -
1.124 - /**
1.125 - * Returns the name of the field represented by this {@code Field} object.
1.126 - */
1.127 - public String getName() {
1.128 - return name;
1.129 - }
1.130 -
1.131 - /**
1.132 - * Returns the Java language modifiers for the field represented
1.133 - * by this {@code Field} object, as an integer. The {@code Modifier} class should
1.134 - * be used to decode the modifiers.
1.135 - *
1.136 - * @see Modifier
1.137 - */
1.138 - public int getModifiers() {
1.139 - return modifiers;
1.140 - }
1.141 -
1.142 - /**
1.143 - * Returns {@code true} if this field represents an element of
1.144 - * an enumerated type; returns {@code false} otherwise.
1.145 - *
1.146 - * @return {@code true} if and only if this field represents an element of
1.147 - * an enumerated type.
1.148 - * @since 1.5
1.149 - */
1.150 - public boolean isEnumConstant() {
1.151 - return (getModifiers() & Modifier.ENUM) != 0;
1.152 - }
1.153 -
1.154 - /**
1.155 - * Returns {@code true} if this field is a synthetic
1.156 - * field; returns {@code false} otherwise.
1.157 - *
1.158 - * @return true if and only if this field is a synthetic
1.159 - * field as defined by the Java Language Specification.
1.160 - * @since 1.5
1.161 - */
1.162 - public boolean isSynthetic() {
1.163 - return Modifier.isSynthetic(getModifiers());
1.164 - }
1.165 -
1.166 - /**
1.167 - * Returns a {@code Class} object that identifies the
1.168 - * declared type for the field represented by this
1.169 - * {@code Field} object.
1.170 - *
1.171 - * @return a {@code Class} object identifying the declared
1.172 - * type of the field represented by this object
1.173 - */
1.174 - public Class<?> getType() {
1.175 - return type;
1.176 - }
1.177 -
1.178 - /**
1.179 - * Returns a {@code Type} object that represents the declared type for
1.180 - * the field represented by this {@code Field} object.
1.181 - *
1.182 - * <p>If the {@code Type} is a parameterized type, the
1.183 - * {@code Type} object returned must accurately reflect the
1.184 - * actual type parameters used in the source code.
1.185 - *
1.186 - * <p>If the type of the underlying field is a type variable or a
1.187 - * parameterized type, it is created. Otherwise, it is resolved.
1.188 - *
1.189 - * @return a {@code Type} object that represents the declared type for
1.190 - * the field represented by this {@code Field} object
1.191 - * @throws GenericSignatureFormatError if the generic field
1.192 - * signature does not conform to the format specified in
1.193 - * <cite>The Java™ Virtual Machine Specification</cite>
1.194 - * @throws TypeNotPresentException if the generic type
1.195 - * signature of the underlying field refers to a non-existent
1.196 - * type declaration
1.197 - * @throws MalformedParameterizedTypeException if the generic
1.198 - * signature of the underlying field refers to a parameterized type
1.199 - * that cannot be instantiated for any reason
1.200 - * @since 1.5
1.201 - */
1.202 - public Type getGenericType() {
1.203 - throw new UnsupportedOperationException();
1.204 - }
1.205 -
1.206 -
1.207 - /**
1.208 - * Compares this {@code Field} against the specified object. Returns
1.209 - * true if the objects are the same. Two {@code Field} objects are the same if
1.210 - * they were declared by the same class and have the same name
1.211 - * and type.
1.212 - */
1.213 - public boolean equals(Object obj) {
1.214 - if (obj != null && obj instanceof Field) {
1.215 - Field other = (Field)obj;
1.216 - return (getDeclaringClass() == other.getDeclaringClass())
1.217 - && (getName() == other.getName())
1.218 - && (getType() == other.getType());
1.219 - }
1.220 - return false;
1.221 - }
1.222 -
1.223 - /**
1.224 - * Returns a hashcode for this {@code Field}. This is computed as the
1.225 - * exclusive-or of the hashcodes for the underlying field's
1.226 - * declaring class name and its name.
1.227 - */
1.228 - public int hashCode() {
1.229 - return getDeclaringClass().getName().hashCode() ^ getName().hashCode();
1.230 - }
1.231 -
1.232 - /**
1.233 - * Returns a string describing this {@code Field}. The format is
1.234 - * the access modifiers for the field, if any, followed
1.235 - * by the field type, followed by a space, followed by
1.236 - * the fully-qualified name of the class declaring the field,
1.237 - * followed by a period, followed by the name of the field.
1.238 - * For example:
1.239 - * <pre>
1.240 - * public static final int java.lang.Thread.MIN_PRIORITY
1.241 - * private int java.io.FileDescriptor.fd
1.242 - * </pre>
1.243 - *
1.244 - * <p>The modifiers are placed in canonical order as specified by
1.245 - * "The Java Language Specification". This is {@code public},
1.246 - * {@code protected} or {@code private} first, and then other
1.247 - * modifiers in the following order: {@code static}, {@code final},
1.248 - * {@code transient}, {@code volatile}.
1.249 - */
1.250 - public String toString() {
1.251 - int mod = getModifiers();
1.252 - return (((mod == 0) ? "" : (Modifier.toString(mod) + " "))
1.253 - + getTypeName(getType()) + " "
1.254 - + getTypeName(getDeclaringClass()) + "."
1.255 - + getName());
1.256 - }
1.257 -
1.258 - /**
1.259 - * Returns a string describing this {@code Field}, including
1.260 - * its generic type. The format is the access modifiers for the
1.261 - * field, if any, followed by the generic field type, followed by
1.262 - * a space, followed by the fully-qualified name of the class
1.263 - * declaring the field, followed by a period, followed by the name
1.264 - * of the field.
1.265 - *
1.266 - * <p>The modifiers are placed in canonical order as specified by
1.267 - * "The Java Language Specification". This is {@code public},
1.268 - * {@code protected} or {@code private} first, and then other
1.269 - * modifiers in the following order: {@code static}, {@code final},
1.270 - * {@code transient}, {@code volatile}.
1.271 - *
1.272 - * @return a string describing this {@code Field}, including
1.273 - * its generic type
1.274 - *
1.275 - * @since 1.5
1.276 - */
1.277 - public String toGenericString() {
1.278 - int mod = getModifiers();
1.279 - Type fieldType = getGenericType();
1.280 - return (((mod == 0) ? "" : (Modifier.toString(mod) + " "))
1.281 - + ((fieldType instanceof Class) ?
1.282 - getTypeName((Class)fieldType): fieldType.toString())+ " "
1.283 - + getTypeName(getDeclaringClass()) + "."
1.284 - + getName());
1.285 - }
1.286 -
1.287 - /**
1.288 - * Returns the value of the field represented by this {@code Field}, on
1.289 - * the specified object. The value is automatically wrapped in an
1.290 - * object if it has a primitive type.
1.291 - *
1.292 - * <p>The underlying field's value is obtained as follows:
1.293 - *
1.294 - * <p>If the underlying field is a static field, the {@code obj} argument
1.295 - * is ignored; it may be null.
1.296 - *
1.297 - * <p>Otherwise, the underlying field is an instance field. If the
1.298 - * specified {@code obj} argument is null, the method throws a
1.299 - * {@code NullPointerException}. If the specified object is not an
1.300 - * instance of the class or interface declaring the underlying
1.301 - * field, the method throws an {@code IllegalArgumentException}.
1.302 - *
1.303 - * <p>If this {@code Field} object is enforcing Java language access control, and
1.304 - * the underlying field is inaccessible, the method throws an
1.305 - * {@code IllegalAccessException}.
1.306 - * If the underlying field is static, the class that declared the
1.307 - * field is initialized if it has not already been initialized.
1.308 - *
1.309 - * <p>Otherwise, the value is retrieved from the underlying instance
1.310 - * or static field. If the field has a primitive type, the value
1.311 - * is wrapped in an object before being returned, otherwise it is
1.312 - * returned as is.
1.313 - *
1.314 - * <p>If the field is hidden in the type of {@code obj},
1.315 - * the field's value is obtained according to the preceding rules.
1.316 - *
1.317 - * @param obj object from which the represented field's value is
1.318 - * to be extracted
1.319 - * @return the value of the represented field in object
1.320 - * {@code obj}; primitive values are wrapped in an appropriate
1.321 - * object before being returned
1.322 - *
1.323 - * @exception IllegalAccessException if this {@code Field} object
1.324 - * is enforcing Java language access control and the underlying
1.325 - * field is inaccessible.
1.326 - * @exception IllegalArgumentException if the specified object is not an
1.327 - * instance of the class or interface declaring the underlying
1.328 - * field (or a subclass or implementor thereof).
1.329 - * @exception NullPointerException if the specified object is null
1.330 - * and the field is an instance field.
1.331 - * @exception ExceptionInInitializerError if the initialization provoked
1.332 - * by this method fails.
1.333 - */
1.334 - public Object get(Object obj)
1.335 - throws IllegalArgumentException, IllegalAccessException
1.336 - {
1.337 - return getFieldAccessor(obj).get(obj);
1.338 - }
1.339 -
1.340 - /**
1.341 - * Gets the value of a static or instance {@code boolean} field.
1.342 - *
1.343 - * @param obj the object to extract the {@code boolean} value
1.344 - * from
1.345 - * @return the value of the {@code boolean} field
1.346 - *
1.347 - * @exception IllegalAccessException if this {@code Field} object
1.348 - * is enforcing Java language access control and the underlying
1.349 - * field is inaccessible.
1.350 - * @exception IllegalArgumentException if the specified object is not
1.351 - * an instance of the class or interface declaring the
1.352 - * underlying field (or a subclass or implementor
1.353 - * thereof), or if the field value cannot be
1.354 - * converted to the type {@code boolean} by a
1.355 - * widening conversion.
1.356 - * @exception NullPointerException if the specified object is null
1.357 - * and the field is an instance field.
1.358 - * @exception ExceptionInInitializerError if the initialization provoked
1.359 - * by this method fails.
1.360 - * @see Field#get
1.361 - */
1.362 - public boolean getBoolean(Object obj)
1.363 - throws IllegalArgumentException, IllegalAccessException
1.364 - {
1.365 - return getFieldAccessor(obj).getBoolean(obj);
1.366 - }
1.367 -
1.368 - /**
1.369 - * Gets the value of a static or instance {@code byte} field.
1.370 - *
1.371 - * @param obj the object to extract the {@code byte} value
1.372 - * from
1.373 - * @return the value of the {@code byte} field
1.374 - *
1.375 - * @exception IllegalAccessException if this {@code Field} object
1.376 - * is enforcing Java language access control and the underlying
1.377 - * field is inaccessible.
1.378 - * @exception IllegalArgumentException if the specified object is not
1.379 - * an instance of the class or interface declaring the
1.380 - * underlying field (or a subclass or implementor
1.381 - * thereof), or if the field value cannot be
1.382 - * converted to the type {@code byte} by a
1.383 - * widening conversion.
1.384 - * @exception NullPointerException if the specified object is null
1.385 - * and the field is an instance field.
1.386 - * @exception ExceptionInInitializerError if the initialization provoked
1.387 - * by this method fails.
1.388 - * @see Field#get
1.389 - */
1.390 - public byte getByte(Object obj)
1.391 - throws IllegalArgumentException, IllegalAccessException
1.392 - {
1.393 - return getFieldAccessor(obj).getByte(obj);
1.394 - }
1.395 -
1.396 - /**
1.397 - * Gets the value of a static or instance field of type
1.398 - * {@code char} or of another primitive type convertible to
1.399 - * type {@code char} via a widening conversion.
1.400 - *
1.401 - * @param obj the object to extract the {@code char} value
1.402 - * from
1.403 - * @return the value of the field converted to type {@code char}
1.404 - *
1.405 - * @exception IllegalAccessException if this {@code Field} object
1.406 - * is enforcing Java language access control and the underlying
1.407 - * field is inaccessible.
1.408 - * @exception IllegalArgumentException if the specified object is not
1.409 - * an instance of the class or interface declaring the
1.410 - * underlying field (or a subclass or implementor
1.411 - * thereof), or if the field value cannot be
1.412 - * converted to the type {@code char} by a
1.413 - * widening conversion.
1.414 - * @exception NullPointerException if the specified object is null
1.415 - * and the field is an instance field.
1.416 - * @exception ExceptionInInitializerError if the initialization provoked
1.417 - * by this method fails.
1.418 - * @see Field#get
1.419 - */
1.420 - public char getChar(Object obj)
1.421 - throws IllegalArgumentException, IllegalAccessException
1.422 - {
1.423 - return getFieldAccessor(obj).getChar(obj);
1.424 - }
1.425 -
1.426 - /**
1.427 - * Gets the value of a static or instance field of type
1.428 - * {@code short} or of another primitive type convertible to
1.429 - * type {@code short} via a widening conversion.
1.430 - *
1.431 - * @param obj the object to extract the {@code short} value
1.432 - * from
1.433 - * @return the value of the field converted to type {@code short}
1.434 - *
1.435 - * @exception IllegalAccessException if this {@code Field} object
1.436 - * is enforcing Java language access control and the underlying
1.437 - * field is inaccessible.
1.438 - * @exception IllegalArgumentException if the specified object is not
1.439 - * an instance of the class or interface declaring the
1.440 - * underlying field (or a subclass or implementor
1.441 - * thereof), or if the field value cannot be
1.442 - * converted to the type {@code short} by a
1.443 - * widening conversion.
1.444 - * @exception NullPointerException if the specified object is null
1.445 - * and the field is an instance field.
1.446 - * @exception ExceptionInInitializerError if the initialization provoked
1.447 - * by this method fails.
1.448 - * @see Field#get
1.449 - */
1.450 - public short getShort(Object obj)
1.451 - throws IllegalArgumentException, IllegalAccessException
1.452 - {
1.453 - return getFieldAccessor(obj).getShort(obj);
1.454 - }
1.455 -
1.456 - /**
1.457 - * Gets the value of a static or instance field of type
1.458 - * {@code int} or of another primitive type convertible to
1.459 - * type {@code int} via a widening conversion.
1.460 - *
1.461 - * @param obj the object to extract the {@code int} value
1.462 - * from
1.463 - * @return the value of the field converted to type {@code int}
1.464 - *
1.465 - * @exception IllegalAccessException if this {@code Field} object
1.466 - * is enforcing Java language access control and the underlying
1.467 - * field is inaccessible.
1.468 - * @exception IllegalArgumentException if the specified object is not
1.469 - * an instance of the class or interface declaring the
1.470 - * underlying field (or a subclass or implementor
1.471 - * thereof), or if the field value cannot be
1.472 - * converted to the type {@code int} by a
1.473 - * widening conversion.
1.474 - * @exception NullPointerException if the specified object is null
1.475 - * and the field is an instance field.
1.476 - * @exception ExceptionInInitializerError if the initialization provoked
1.477 - * by this method fails.
1.478 - * @see Field#get
1.479 - */
1.480 - public int getInt(Object obj)
1.481 - throws IllegalArgumentException, IllegalAccessException
1.482 - {
1.483 - return getFieldAccessor(obj).getInt(obj);
1.484 - }
1.485 -
1.486 - /**
1.487 - * Gets the value of a static or instance field of type
1.488 - * {@code long} or of another primitive type convertible to
1.489 - * type {@code long} via a widening conversion.
1.490 - *
1.491 - * @param obj the object to extract the {@code long} value
1.492 - * from
1.493 - * @return the value of the field converted to type {@code long}
1.494 - *
1.495 - * @exception IllegalAccessException if this {@code Field} object
1.496 - * is enforcing Java language access control and the underlying
1.497 - * field is inaccessible.
1.498 - * @exception IllegalArgumentException if the specified object is not
1.499 - * an instance of the class or interface declaring the
1.500 - * underlying field (or a subclass or implementor
1.501 - * thereof), or if the field value cannot be
1.502 - * converted to the type {@code long} by a
1.503 - * widening conversion.
1.504 - * @exception NullPointerException if the specified object is null
1.505 - * and the field is an instance field.
1.506 - * @exception ExceptionInInitializerError if the initialization provoked
1.507 - * by this method fails.
1.508 - * @see Field#get
1.509 - */
1.510 - public long getLong(Object obj)
1.511 - throws IllegalArgumentException, IllegalAccessException
1.512 - {
1.513 - return getFieldAccessor(obj).getLong(obj);
1.514 - }
1.515 -
1.516 - /**
1.517 - * Gets the value of a static or instance field of type
1.518 - * {@code float} or of another primitive type convertible to
1.519 - * type {@code float} via a widening conversion.
1.520 - *
1.521 - * @param obj the object to extract the {@code float} value
1.522 - * from
1.523 - * @return the value of the field converted to type {@code float}
1.524 - *
1.525 - * @exception IllegalAccessException if this {@code Field} object
1.526 - * is enforcing Java language access control and the underlying
1.527 - * field is inaccessible.
1.528 - * @exception IllegalArgumentException if the specified object is not
1.529 - * an instance of the class or interface declaring the
1.530 - * underlying field (or a subclass or implementor
1.531 - * thereof), or if the field value cannot be
1.532 - * converted to the type {@code float} by a
1.533 - * widening conversion.
1.534 - * @exception NullPointerException if the specified object is null
1.535 - * and the field is an instance field.
1.536 - * @exception ExceptionInInitializerError if the initialization provoked
1.537 - * by this method fails.
1.538 - * @see Field#get
1.539 - */
1.540 - public float getFloat(Object obj)
1.541 - throws IllegalArgumentException, IllegalAccessException
1.542 - {
1.543 - return getFieldAccessor(obj).getFloat(obj);
1.544 - }
1.545 -
1.546 - /**
1.547 - * Gets the value of a static or instance field of type
1.548 - * {@code double} or of another primitive type convertible to
1.549 - * type {@code double} via a widening conversion.
1.550 - *
1.551 - * @param obj the object to extract the {@code double} value
1.552 - * from
1.553 - * @return the value of the field converted to type {@code double}
1.554 - *
1.555 - * @exception IllegalAccessException if this {@code Field} object
1.556 - * is enforcing Java language access control and the underlying
1.557 - * field is inaccessible.
1.558 - * @exception IllegalArgumentException if the specified object is not
1.559 - * an instance of the class or interface declaring the
1.560 - * underlying field (or a subclass or implementor
1.561 - * thereof), or if the field value cannot be
1.562 - * converted to the type {@code double} by a
1.563 - * widening conversion.
1.564 - * @exception NullPointerException if the specified object is null
1.565 - * and the field is an instance field.
1.566 - * @exception ExceptionInInitializerError if the initialization provoked
1.567 - * by this method fails.
1.568 - * @see Field#get
1.569 - */
1.570 - public double getDouble(Object obj)
1.571 - throws IllegalArgumentException, IllegalAccessException
1.572 - {
1.573 - return getFieldAccessor(obj).getDouble(obj);
1.574 - }
1.575 -
1.576 - /**
1.577 - * Sets the field represented by this {@code Field} object on the
1.578 - * specified object argument to the specified new value. The new
1.579 - * value is automatically unwrapped if the underlying field has a
1.580 - * primitive type.
1.581 - *
1.582 - * <p>The operation proceeds as follows:
1.583 - *
1.584 - * <p>If the underlying field is static, the {@code obj} argument is
1.585 - * ignored; it may be null.
1.586 - *
1.587 - * <p>Otherwise the underlying field is an instance field. If the
1.588 - * specified object argument is null, the method throws a
1.589 - * {@code NullPointerException}. If the specified object argument is not
1.590 - * an instance of the class or interface declaring the underlying
1.591 - * field, the method throws an {@code IllegalArgumentException}.
1.592 - *
1.593 - * <p>If this {@code Field} object is enforcing Java language access control, and
1.594 - * the underlying field is inaccessible, the method throws an
1.595 - * {@code IllegalAccessException}.
1.596 - *
1.597 - * <p>If the underlying field is final, the method throws an
1.598 - * {@code IllegalAccessException} unless {@code setAccessible(true)}
1.599 - * has succeeded for this {@code Field} object
1.600 - * and the field is non-static. Setting a final field in this way
1.601 - * is meaningful only during deserialization or reconstruction of
1.602 - * instances of classes with blank final fields, before they are
1.603 - * made available for access by other parts of a program. Use in
1.604 - * any other context may have unpredictable effects, including cases
1.605 - * in which other parts of a program continue to use the original
1.606 - * value of this field.
1.607 - *
1.608 - * <p>If the underlying field is of a primitive type, an unwrapping
1.609 - * conversion is attempted to convert the new value to a value of
1.610 - * a primitive type. If this attempt fails, the method throws an
1.611 - * {@code IllegalArgumentException}.
1.612 - *
1.613 - * <p>If, after possible unwrapping, the new value cannot be
1.614 - * converted to the type of the underlying field by an identity or
1.615 - * widening conversion, the method throws an
1.616 - * {@code IllegalArgumentException}.
1.617 - *
1.618 - * <p>If the underlying field is static, the class that declared the
1.619 - * field is initialized if it has not already been initialized.
1.620 - *
1.621 - * <p>The field is set to the possibly unwrapped and widened new value.
1.622 - *
1.623 - * <p>If the field is hidden in the type of {@code obj},
1.624 - * the field's value is set according to the preceding rules.
1.625 - *
1.626 - * @param obj the object whose field should be modified
1.627 - * @param value the new value for the field of {@code obj}
1.628 - * being modified
1.629 - *
1.630 - * @exception IllegalAccessException if this {@code Field} object
1.631 - * is enforcing Java language access control and the underlying
1.632 - * field is either inaccessible or final.
1.633 - * @exception IllegalArgumentException if the specified object is not an
1.634 - * instance of the class or interface declaring the underlying
1.635 - * field (or a subclass or implementor thereof),
1.636 - * or if an unwrapping conversion fails.
1.637 - * @exception NullPointerException if the specified object is null
1.638 - * and the field is an instance field.
1.639 - * @exception ExceptionInInitializerError if the initialization provoked
1.640 - * by this method fails.
1.641 - */
1.642 - public void set(Object obj, Object value)
1.643 - throws IllegalArgumentException, IllegalAccessException
1.644 - {
1.645 - getFieldAccessor(obj).set(obj, value);
1.646 - }
1.647 -
1.648 - /**
1.649 - * Sets the value of a field as a {@code boolean} on the specified object.
1.650 - * This method is equivalent to
1.651 - * {@code set(obj, zObj)},
1.652 - * where {@code zObj} is a {@code Boolean} object and
1.653 - * {@code zObj.booleanValue() == z}.
1.654 - *
1.655 - * @param obj the object whose field should be modified
1.656 - * @param z the new value for the field of {@code obj}
1.657 - * being modified
1.658 - *
1.659 - * @exception IllegalAccessException if this {@code Field} object
1.660 - * is enforcing Java language access control and the underlying
1.661 - * field is either inaccessible or final.
1.662 - * @exception IllegalArgumentException if the specified object is not an
1.663 - * instance of the class or interface declaring the underlying
1.664 - * field (or a subclass or implementor thereof),
1.665 - * or if an unwrapping conversion fails.
1.666 - * @exception NullPointerException if the specified object is null
1.667 - * and the field is an instance field.
1.668 - * @exception ExceptionInInitializerError if the initialization provoked
1.669 - * by this method fails.
1.670 - * @see Field#set
1.671 - */
1.672 - public void setBoolean(Object obj, boolean z)
1.673 - throws IllegalArgumentException, IllegalAccessException
1.674 - {
1.675 - getFieldAccessor(obj).setBoolean(obj, z);
1.676 - }
1.677 -
1.678 - /**
1.679 - * Sets the value of a field as a {@code byte} on the specified object.
1.680 - * This method is equivalent to
1.681 - * {@code set(obj, bObj)},
1.682 - * where {@code bObj} is a {@code Byte} object and
1.683 - * {@code bObj.byteValue() == b}.
1.684 - *
1.685 - * @param obj the object whose field should be modified
1.686 - * @param b the new value for the field of {@code obj}
1.687 - * being modified
1.688 - *
1.689 - * @exception IllegalAccessException if this {@code Field} object
1.690 - * is enforcing Java language access control and the underlying
1.691 - * field is either inaccessible or final.
1.692 - * @exception IllegalArgumentException if the specified object is not an
1.693 - * instance of the class or interface declaring the underlying
1.694 - * field (or a subclass or implementor thereof),
1.695 - * or if an unwrapping conversion fails.
1.696 - * @exception NullPointerException if the specified object is null
1.697 - * and the field is an instance field.
1.698 - * @exception ExceptionInInitializerError if the initialization provoked
1.699 - * by this method fails.
1.700 - * @see Field#set
1.701 - */
1.702 - public void setByte(Object obj, byte b)
1.703 - throws IllegalArgumentException, IllegalAccessException
1.704 - {
1.705 - getFieldAccessor(obj).setByte(obj, b);
1.706 - }
1.707 -
1.708 - /**
1.709 - * Sets the value of a field as a {@code char} on the specified object.
1.710 - * This method is equivalent to
1.711 - * {@code set(obj, cObj)},
1.712 - * where {@code cObj} is a {@code Character} object and
1.713 - * {@code cObj.charValue() == c}.
1.714 - *
1.715 - * @param obj the object whose field should be modified
1.716 - * @param c the new value for the field of {@code obj}
1.717 - * being modified
1.718 - *
1.719 - * @exception IllegalAccessException if this {@code Field} object
1.720 - * is enforcing Java language access control and the underlying
1.721 - * field is either inaccessible or final.
1.722 - * @exception IllegalArgumentException if the specified object is not an
1.723 - * instance of the class or interface declaring the underlying
1.724 - * field (or a subclass or implementor thereof),
1.725 - * or if an unwrapping conversion fails.
1.726 - * @exception NullPointerException if the specified object is null
1.727 - * and the field is an instance field.
1.728 - * @exception ExceptionInInitializerError if the initialization provoked
1.729 - * by this method fails.
1.730 - * @see Field#set
1.731 - */
1.732 - public void setChar(Object obj, char c)
1.733 - throws IllegalArgumentException, IllegalAccessException
1.734 - {
1.735 - getFieldAccessor(obj).setChar(obj, c);
1.736 - }
1.737 -
1.738 - /**
1.739 - * Sets the value of a field as a {@code short} on the specified object.
1.740 - * This method is equivalent to
1.741 - * {@code set(obj, sObj)},
1.742 - * where {@code sObj} is a {@code Short} object and
1.743 - * {@code sObj.shortValue() == s}.
1.744 - *
1.745 - * @param obj the object whose field should be modified
1.746 - * @param s the new value for the field of {@code obj}
1.747 - * being modified
1.748 - *
1.749 - * @exception IllegalAccessException if this {@code Field} object
1.750 - * is enforcing Java language access control and the underlying
1.751 - * field is either inaccessible or final.
1.752 - * @exception IllegalArgumentException if the specified object is not an
1.753 - * instance of the class or interface declaring the underlying
1.754 - * field (or a subclass or implementor thereof),
1.755 - * or if an unwrapping conversion fails.
1.756 - * @exception NullPointerException if the specified object is null
1.757 - * and the field is an instance field.
1.758 - * @exception ExceptionInInitializerError if the initialization provoked
1.759 - * by this method fails.
1.760 - * @see Field#set
1.761 - */
1.762 - public void setShort(Object obj, short s)
1.763 - throws IllegalArgumentException, IllegalAccessException
1.764 - {
1.765 - getFieldAccessor(obj).setShort(obj, s);
1.766 - }
1.767 -
1.768 - /**
1.769 - * Sets the value of a field as an {@code int} on the specified object.
1.770 - * This method is equivalent to
1.771 - * {@code set(obj, iObj)},
1.772 - * where {@code iObj} is a {@code Integer} object and
1.773 - * {@code iObj.intValue() == i}.
1.774 - *
1.775 - * @param obj the object whose field should be modified
1.776 - * @param i the new value for the field of {@code obj}
1.777 - * being modified
1.778 - *
1.779 - * @exception IllegalAccessException if this {@code Field} object
1.780 - * is enforcing Java language access control and the underlying
1.781 - * field is either inaccessible or final.
1.782 - * @exception IllegalArgumentException if the specified object is not an
1.783 - * instance of the class or interface declaring the underlying
1.784 - * field (or a subclass or implementor thereof),
1.785 - * or if an unwrapping conversion fails.
1.786 - * @exception NullPointerException if the specified object is null
1.787 - * and the field is an instance field.
1.788 - * @exception ExceptionInInitializerError if the initialization provoked
1.789 - * by this method fails.
1.790 - * @see Field#set
1.791 - */
1.792 - public void setInt(Object obj, int i)
1.793 - throws IllegalArgumentException, IllegalAccessException
1.794 - {
1.795 - getFieldAccessor(obj).setInt(obj, i);
1.796 - }
1.797 -
1.798 - /**
1.799 - * Sets the value of a field as a {@code long} on the specified object.
1.800 - * This method is equivalent to
1.801 - * {@code set(obj, lObj)},
1.802 - * where {@code lObj} is a {@code Long} object and
1.803 - * {@code lObj.longValue() == l}.
1.804 - *
1.805 - * @param obj the object whose field should be modified
1.806 - * @param l the new value for the field of {@code obj}
1.807 - * being modified
1.808 - *
1.809 - * @exception IllegalAccessException if this {@code Field} object
1.810 - * is enforcing Java language access control and the underlying
1.811 - * field is either inaccessible or final.
1.812 - * @exception IllegalArgumentException if the specified object is not an
1.813 - * instance of the class or interface declaring the underlying
1.814 - * field (or a subclass or implementor thereof),
1.815 - * or if an unwrapping conversion fails.
1.816 - * @exception NullPointerException if the specified object is null
1.817 - * and the field is an instance field.
1.818 - * @exception ExceptionInInitializerError if the initialization provoked
1.819 - * by this method fails.
1.820 - * @see Field#set
1.821 - */
1.822 - public void setLong(Object obj, long l)
1.823 - throws IllegalArgumentException, IllegalAccessException
1.824 - {
1.825 - getFieldAccessor(obj).setLong(obj, l);
1.826 - }
1.827 -
1.828 - /**
1.829 - * Sets the value of a field as a {@code float} on the specified object.
1.830 - * This method is equivalent to
1.831 - * {@code set(obj, fObj)},
1.832 - * where {@code fObj} is a {@code Float} object and
1.833 - * {@code fObj.floatValue() == f}.
1.834 - *
1.835 - * @param obj the object whose field should be modified
1.836 - * @param f the new value for the field of {@code obj}
1.837 - * being modified
1.838 - *
1.839 - * @exception IllegalAccessException if this {@code Field} object
1.840 - * is enforcing Java language access control and the underlying
1.841 - * field is either inaccessible or final.
1.842 - * @exception IllegalArgumentException if the specified object is not an
1.843 - * instance of the class or interface declaring the underlying
1.844 - * field (or a subclass or implementor thereof),
1.845 - * or if an unwrapping conversion fails.
1.846 - * @exception NullPointerException if the specified object is null
1.847 - * and the field is an instance field.
1.848 - * @exception ExceptionInInitializerError if the initialization provoked
1.849 - * by this method fails.
1.850 - * @see Field#set
1.851 - */
1.852 - public void setFloat(Object obj, float f)
1.853 - throws IllegalArgumentException, IllegalAccessException
1.854 - {
1.855 - getFieldAccessor(obj).setFloat(obj, f);
1.856 - }
1.857 -
1.858 - /**
1.859 - * Sets the value of a field as a {@code double} on the specified object.
1.860 - * This method is equivalent to
1.861 - * {@code set(obj, dObj)},
1.862 - * where {@code dObj} is a {@code Double} object and
1.863 - * {@code dObj.doubleValue() == d}.
1.864 - *
1.865 - * @param obj the object whose field should be modified
1.866 - * @param d the new value for the field of {@code obj}
1.867 - * being modified
1.868 - *
1.869 - * @exception IllegalAccessException if this {@code Field} object
1.870 - * is enforcing Java language access control and the underlying
1.871 - * field is either inaccessible or final.
1.872 - * @exception IllegalArgumentException if the specified object is not an
1.873 - * instance of the class or interface declaring the underlying
1.874 - * field (or a subclass or implementor thereof),
1.875 - * or if an unwrapping conversion fails.
1.876 - * @exception NullPointerException if the specified object is null
1.877 - * and the field is an instance field.
1.878 - * @exception ExceptionInInitializerError if the initialization provoked
1.879 - * by this method fails.
1.880 - * @see Field#set
1.881 - */
1.882 - public void setDouble(Object obj, double d)
1.883 - throws IllegalArgumentException, IllegalAccessException
1.884 - {
1.885 - getFieldAccessor(obj).setDouble(obj, d);
1.886 - }
1.887 -
1.888 - // Convenience routine which performs security checks
1.889 - private FieldAccessor getFieldAccessor(Object obj)
1.890 - throws IllegalAccessException
1.891 - {
1.892 - throw new SecurityException();
1.893 - }
1.894 -
1.895 - private static abstract class FieldAccessor {
1.896 - abstract void setShort(Object obj, short s);
1.897 - abstract void setInt(Object obj, int i);
1.898 - abstract void setChar(Object obj, char c);
1.899 - abstract void setByte(Object obj, byte b);
1.900 - abstract void setBoolean(Object obj, boolean z);
1.901 - abstract void set(Object obj, Object value);
1.902 - abstract double getDouble(Object obj);
1.903 - abstract void setLong(Object obj, long l);
1.904 - abstract void setFloat(Object obj, float f);
1.905 - abstract void setDouble(Object obj, double d);
1.906 - abstract long getLong(Object obj);
1.907 - abstract int getInt(Object obj);
1.908 - abstract short getShort(Object obj);
1.909 - abstract char getChar(Object obj);
1.910 - abstract byte getByte(Object obj);
1.911 - abstract boolean getBoolean(Object obj);
1.912 - abstract Object get(Object obj);
1.913 - abstract float getFloat(Object obj);
1.914 - }
1.915 -
1.916 - /*
1.917 - * Utility routine to paper over array type names
1.918 - */
1.919 - static String getTypeName(Class<?> type) {
1.920 - if (type.isArray()) {
1.921 - try {
1.922 - Class<?> cl = type;
1.923 - int dimensions = 0;
1.924 - while (cl.isArray()) {
1.925 - dimensions++;
1.926 - cl = cl.getComponentType();
1.927 - }
1.928 - StringBuffer sb = new StringBuffer();
1.929 - sb.append(cl.getName());
1.930 - for (int i = 0; i < dimensions; i++) {
1.931 - sb.append("[]");
1.932 - }
1.933 - return sb.toString();
1.934 - } catch (Throwable e) { /*FALLTHRU*/ }
1.935 - }
1.936 - return type.getName();
1.937 - }
1.938 -
1.939 - /**
1.940 - * @throws NullPointerException {@inheritDoc}
1.941 - * @since 1.5
1.942 - */
1.943 - public <T extends Annotation> T getAnnotation(Class<T> annotationClass) {
1.944 - if (annotationClass == null)
1.945 - throw new NullPointerException();
1.946 -
1.947 - throw new UnsupportedOperationException();
1.948 - }
1.949 -
1.950 - /**
1.951 - * @since 1.5
1.952 - */
1.953 - public Annotation[] getDeclaredAnnotations() {
1.954 - throw new UnsupportedOperationException();
1.955 - }
1.956 -}