--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/lang/reflect/Field.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,1041 @@
+/*
+ * Copyright 1996-2006 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package java.lang.reflect;
+
+import sun.reflect.FieldAccessor;
+import sun.reflect.Reflection;
+import sun.reflect.generics.repository.FieldRepository;
+import sun.reflect.generics.factory.CoreReflectionFactory;
+import sun.reflect.generics.factory.GenericsFactory;
+import sun.reflect.generics.scope.ClassScope;
+import java.lang.annotation.Annotation;
+import java.util.Map;
+import sun.reflect.annotation.AnnotationParser;
+
+
+/**
+ * A {@code Field} provides information about, and dynamic access to, a
+ * single field of a class or an interface. The reflected field may
+ * be a class (static) field or an instance field.
+ *
+ * <p>A {@code Field} permits widening conversions to occur during a get or
+ * set access operation, but throws an {@code IllegalArgumentException} if a
+ * narrowing conversion would occur.
+ *
+ * @see Member
+ * @see java.lang.Class
+ * @see java.lang.Class#getFields()
+ * @see java.lang.Class#getField(String)
+ * @see java.lang.Class#getDeclaredFields()
+ * @see java.lang.Class#getDeclaredField(String)
+ *
+ * @author Kenneth Russell
+ * @author Nakul Saraiya
+ */
+public final
+class Field extends AccessibleObject implements Member {
+
+ private Class clazz;
+ private int slot;
+ // This is guaranteed to be interned by the VM in the 1.4
+ // reflection implementation
+ private String name;
+ private Class type;
+ private int modifiers;
+ // Generics and annotations support
+ private transient String signature;
+ // generic info repository; lazily initialized
+ private transient FieldRepository genericInfo;
+ private byte[] annotations;
+ // Cached field accessor created without override
+ private FieldAccessor fieldAccessor;
+ // Cached field accessor created with override
+ private FieldAccessor overrideFieldAccessor;
+ // For sharing of FieldAccessors. This branching structure is
+ // currently only two levels deep (i.e., one root Field and
+ // potentially many Field objects pointing to it.)
+ private Field root;
+
+ // More complicated security check cache needed here than for
+ // Class.newInstance() and Constructor.newInstance()
+ private Class securityCheckCache;
+ private Class securityCheckTargetClassCache;
+
+ // Generics infrastructure
+
+ private String getGenericSignature() {return signature;}
+
+ // Accessor for factory
+ private GenericsFactory getFactory() {
+ Class<?> c = getDeclaringClass();
+ // create scope and factory
+ return CoreReflectionFactory.make(c, ClassScope.make(c));
+ }
+
+ // Accessor for generic info repository
+ private FieldRepository getGenericInfo() {
+ // lazily initialize repository if necessary
+ if (genericInfo == null) {
+ // create and cache generic info repository
+ genericInfo = FieldRepository.make(getGenericSignature(),
+ getFactory());
+ }
+ return genericInfo; //return cached repository
+ }
+
+
+ /**
+ * Package-private constructor used by ReflectAccess to enable
+ * instantiation of these objects in Java code from the java.lang
+ * package via sun.reflect.LangReflectAccess.
+ */
+ Field(Class declaringClass,
+ String name,
+ Class type,
+ int modifiers,
+ int slot,
+ String signature,
+ byte[] annotations)
+ {
+ this.clazz = declaringClass;
+ this.name = name;
+ this.type = type;
+ this.modifiers = modifiers;
+ this.slot = slot;
+ this.signature = signature;
+ this.annotations = annotations;
+ }
+
+ /**
+ * Package-private routine (exposed to java.lang.Class via
+ * ReflectAccess) which returns a copy of this Field. The copy's
+ * "root" field points to this Field.
+ */
+ Field copy() {
+ // This routine enables sharing of FieldAccessor objects
+ // among Field objects which refer to the same underlying
+ // method in the VM. (All of this contortion is only necessary
+ // because of the "accessibility" bit in AccessibleObject,
+ // which implicitly requires that new java.lang.reflect
+ // objects be fabricated for each reflective call on Class
+ // objects.)
+ Field res = new Field(clazz, name, type, modifiers, slot, signature, annotations);
+ res.root = this;
+ // Might as well eagerly propagate this if already present
+ res.fieldAccessor = fieldAccessor;
+ res.overrideFieldAccessor = overrideFieldAccessor;
+ return res;
+ }
+
+ /**
+ * Returns the {@code Class} object representing the class or interface
+ * that declares the field represented by this {@code Field} object.
+ */
+ public Class<?> getDeclaringClass() {
+ return clazz;
+ }
+
+ /**
+ * Returns the name of the field represented by this {@code Field} object.
+ */
+ public String getName() {
+ return name;
+ }
+
+ /**
+ * Returns the Java language modifiers for the field represented
+ * by this {@code Field} object, as an integer. The {@code Modifier} class should
+ * be used to decode the modifiers.
+ *
+ * @see Modifier
+ */
+ public int getModifiers() {
+ return modifiers;
+ }
+
+ /**
+ * Returns {@code true} if this field represents an element of
+ * an enumerated type; returns {@code false} otherwise.
+ *
+ * @return {@code true} if and only if this field represents an element of
+ * an enumerated type.
+ * @since 1.5
+ */
+ public boolean isEnumConstant() {
+ return (getModifiers() & Modifier.ENUM) != 0;
+ }
+
+ /**
+ * Returns {@code true} if this field is a synthetic
+ * field; returns {@code false} otherwise.
+ *
+ * @return true if and only if this field is a synthetic
+ * field as defined by the Java Language Specification.
+ * @since 1.5
+ */
+ public boolean isSynthetic() {
+ return Modifier.isSynthetic(getModifiers());
+ }
+
+ /**
+ * Returns a {@code Class} object that identifies the
+ * declared type for the field represented by this
+ * {@code Field} object.
+ *
+ * @return a {@code Class} object identifying the declared
+ * type of the field represented by this object
+ */
+ public Class<?> getType() {
+ return type;
+ }
+
+ /**
+ * Returns a {@code Type} object that represents the declared type for
+ * the field represented by this {@code Field} object.
+ *
+ * <p>If the {@code Type} is a parameterized type, the
+ * {@code Type} object returned must accurately reflect the
+ * actual type parameters used in the source code.
+ *
+ * <p>If the type of the underlying field is a type variable or a
+ * parameterized type, it is created. Otherwise, it is resolved.
+ *
+ * @return a {@code Type} object that represents the declared type for
+ * the field represented by this {@code Field} object
+ * @throws GenericSignatureFormatError if the generic field
+ * signature does not conform to the format specified in the Java
+ * Virtual Machine Specification, 3rd edition
+ * @throws TypeNotPresentException if the generic type
+ * signature of the underlying field refers to a non-existent
+ * type declaration
+ * @throws MalformedParameterizedTypeException if the generic
+ * signature of the underlying field refers to a parameterized type
+ * that cannot be instantiated for any reason
+ * @since 1.5
+ */
+ public Type getGenericType() {
+ if (getGenericSignature() != null)
+ return getGenericInfo().getGenericType();
+ else
+ return getType();
+ }
+
+
+ /**
+ * Compares this {@code Field} against the specified object. Returns
+ * true if the objects are the same. Two {@code Field} objects are the same if
+ * they were declared by the same class and have the same name
+ * and type.
+ */
+ public boolean equals(Object obj) {
+ if (obj != null && obj instanceof Field) {
+ Field other = (Field)obj;
+ return (getDeclaringClass() == other.getDeclaringClass())
+ && (getName() == other.getName())
+ && (getType() == other.getType());
+ }
+ return false;
+ }
+
+ /**
+ * Returns a hashcode for this {@code Field}. This is computed as the
+ * exclusive-or of the hashcodes for the underlying field's
+ * declaring class name and its name.
+ */
+ public int hashCode() {
+ return getDeclaringClass().getName().hashCode() ^ getName().hashCode();
+ }
+
+ /**
+ * Returns a string describing this {@code Field}. The format is
+ * the access modifiers for the field, if any, followed
+ * by the field type, followed by a space, followed by
+ * the fully-qualified name of the class declaring the field,
+ * followed by a period, followed by the name of the field.
+ * For example:
+ * <pre>
+ * public static final int java.lang.Thread.MIN_PRIORITY
+ * private int java.io.FileDescriptor.fd
+ * </pre>
+ *
+ * <p>The modifiers are placed in canonical order as specified by
+ * "The Java Language Specification". This is {@code public},
+ * {@code protected} or {@code private} first, and then other
+ * modifiers in the following order: {@code static}, {@code final},
+ * {@code transient}, {@code volatile}.
+ */
+ public String toString() {
+ int mod = getModifiers();
+ return (((mod == 0) ? "" : (Modifier.toString(mod) + " "))
+ + getTypeName(getType()) + " "
+ + getTypeName(getDeclaringClass()) + "."
+ + getName());
+ }
+
+ /**
+ * Returns a string describing this {@code Field}, including
+ * its generic type. The format is the access modifiers for the
+ * field, if any, followed by the generic field type, followed by
+ * a space, followed by the fully-qualified name of the class
+ * declaring the field, followed by a period, followed by the name
+ * of the field.
+ *
+ * <p>The modifiers are placed in canonical order as specified by
+ * "The Java Language Specification". This is {@code public},
+ * {@code protected} or {@code private} first, and then other
+ * modifiers in the following order: {@code static}, {@code final},
+ * {@code transient}, {@code volatile}.
+ *
+ * @return a string describing this {@code Field}, including
+ * its generic type
+ *
+ * @since 1.5
+ */
+ public String toGenericString() {
+ int mod = getModifiers();
+ Type fieldType = getGenericType();
+ return (((mod == 0) ? "" : (Modifier.toString(mod) + " "))
+ + ((fieldType instanceof Class) ?
+ getTypeName((Class)fieldType): fieldType.toString())+ " "
+ + getTypeName(getDeclaringClass()) + "."
+ + getName());
+ }
+
+ /**
+ * Returns the value of the field represented by this {@code Field}, on
+ * the specified object. The value is automatically wrapped in an
+ * object if it has a primitive type.
+ *
+ * <p>The underlying field's value is obtained as follows:
+ *
+ * <p>If the underlying field is a static field, the {@code obj} argument
+ * is ignored; it may be null.
+ *
+ * <p>Otherwise, the underlying field is an instance field. If the
+ * specified {@code obj} argument is null, the method throws a
+ * {@code NullPointerException}. If the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field, the method throws an {@code IllegalArgumentException}.
+ *
+ * <p>If this {@code Field} object enforces Java language access control, and
+ * the underlying field is inaccessible, the method throws an
+ * {@code IllegalAccessException}.
+ * If the underlying field is static, the class that declared the
+ * field is initialized if it has not already been initialized.
+ *
+ * <p>Otherwise, the value is retrieved from the underlying instance
+ * or static field. If the field has a primitive type, the value
+ * is wrapped in an object before being returned, otherwise it is
+ * returned as is.
+ *
+ * <p>If the field is hidden in the type of {@code obj},
+ * the field's value is obtained according to the preceding rules.
+ *
+ * @param obj object from which the represented field's value is
+ * to be extracted
+ * @return the value of the represented field in object
+ * {@code obj}; primitive values are wrapped in an appropriate
+ * object before being returned
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof).
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ */
+ public Object get(Object obj)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ return getFieldAccessor(obj).get(obj);
+ }
+
+ /**
+ * Gets the value of a static or instance {@code boolean} field.
+ *
+ * @param obj the object to extract the {@code boolean} value
+ * from
+ * @return the value of the {@code boolean} field
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not
+ * an instance of the class or interface declaring the
+ * underlying field (or a subclass or implementor
+ * thereof), or if the field value cannot be
+ * converted to the type {@code boolean} by a
+ * widening conversion.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#get
+ */
+ public boolean getBoolean(Object obj)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ return getFieldAccessor(obj).getBoolean(obj);
+ }
+
+ /**
+ * Gets the value of a static or instance {@code byte} field.
+ *
+ * @param obj the object to extract the {@code byte} value
+ * from
+ * @return the value of the {@code byte} field
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not
+ * an instance of the class or interface declaring the
+ * underlying field (or a subclass or implementor
+ * thereof), or if the field value cannot be
+ * converted to the type {@code byte} by a
+ * widening conversion.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#get
+ */
+ public byte getByte(Object obj)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ return getFieldAccessor(obj).getByte(obj);
+ }
+
+ /**
+ * Gets the value of a static or instance field of type
+ * {@code char} or of another primitive type convertible to
+ * type {@code char} via a widening conversion.
+ *
+ * @param obj the object to extract the {@code char} value
+ * from
+ * @return the value of the field converted to type {@code char}
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not
+ * an instance of the class or interface declaring the
+ * underlying field (or a subclass or implementor
+ * thereof), or if the field value cannot be
+ * converted to the type {@code char} by a
+ * widening conversion.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#get
+ */
+ public char getChar(Object obj)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ return getFieldAccessor(obj).getChar(obj);
+ }
+
+ /**
+ * Gets the value of a static or instance field of type
+ * {@code short} or of another primitive type convertible to
+ * type {@code short} via a widening conversion.
+ *
+ * @param obj the object to extract the {@code short} value
+ * from
+ * @return the value of the field converted to type {@code short}
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not
+ * an instance of the class or interface declaring the
+ * underlying field (or a subclass or implementor
+ * thereof), or if the field value cannot be
+ * converted to the type {@code short} by a
+ * widening conversion.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#get
+ */
+ public short getShort(Object obj)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ return getFieldAccessor(obj).getShort(obj);
+ }
+
+ /**
+ * Gets the value of a static or instance field of type
+ * {@code int} or of another primitive type convertible to
+ * type {@code int} via a widening conversion.
+ *
+ * @param obj the object to extract the {@code int} value
+ * from
+ * @return the value of the field converted to type {@code int}
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not
+ * an instance of the class or interface declaring the
+ * underlying field (or a subclass or implementor
+ * thereof), or if the field value cannot be
+ * converted to the type {@code int} by a
+ * widening conversion.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#get
+ */
+ public int getInt(Object obj)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ return getFieldAccessor(obj).getInt(obj);
+ }
+
+ /**
+ * Gets the value of a static or instance field of type
+ * {@code long} or of another primitive type convertible to
+ * type {@code long} via a widening conversion.
+ *
+ * @param obj the object to extract the {@code long} value
+ * from
+ * @return the value of the field converted to type {@code long}
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not
+ * an instance of the class or interface declaring the
+ * underlying field (or a subclass or implementor
+ * thereof), or if the field value cannot be
+ * converted to the type {@code long} by a
+ * widening conversion.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#get
+ */
+ public long getLong(Object obj)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ return getFieldAccessor(obj).getLong(obj);
+ }
+
+ /**
+ * Gets the value of a static or instance field of type
+ * {@code float} or of another primitive type convertible to
+ * type {@code float} via a widening conversion.
+ *
+ * @param obj the object to extract the {@code float} value
+ * from
+ * @return the value of the field converted to type {@code float}
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not
+ * an instance of the class or interface declaring the
+ * underlying field (or a subclass or implementor
+ * thereof), or if the field value cannot be
+ * converted to the type {@code float} by a
+ * widening conversion.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#get
+ */
+ public float getFloat(Object obj)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ return getFieldAccessor(obj).getFloat(obj);
+ }
+
+ /**
+ * Gets the value of a static or instance field of type
+ * {@code double} or of another primitive type convertible to
+ * type {@code double} via a widening conversion.
+ *
+ * @param obj the object to extract the {@code double} value
+ * from
+ * @return the value of the field converted to type {@code double}
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not
+ * an instance of the class or interface declaring the
+ * underlying field (or a subclass or implementor
+ * thereof), or if the field value cannot be
+ * converted to the type {@code double} by a
+ * widening conversion.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#get
+ */
+ public double getDouble(Object obj)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ return getFieldAccessor(obj).getDouble(obj);
+ }
+
+ /**
+ * Sets the field represented by this {@code Field} object on the
+ * specified object argument to the specified new value. The new
+ * value is automatically unwrapped if the underlying field has a
+ * primitive type.
+ *
+ * <p>The operation proceeds as follows:
+ *
+ * <p>If the underlying field is static, the {@code obj} argument is
+ * ignored; it may be null.
+ *
+ * <p>Otherwise the underlying field is an instance field. If the
+ * specified object argument is null, the method throws a
+ * {@code NullPointerException}. If the specified object argument is not
+ * an instance of the class or interface declaring the underlying
+ * field, the method throws an {@code IllegalArgumentException}.
+ *
+ * <p>If this {@code Field} object enforces Java language access control, and
+ * the underlying field is inaccessible, the method throws an
+ * {@code IllegalAccessException}.
+ *
+ * <p>If the underlying field is final, the method throws an
+ * {@code IllegalAccessException} unless
+ * {@code setAccessible(true)} has succeeded for this field
+ * and this field is non-static. Setting a final field in this way
+ * is meaningful only during deserialization or reconstruction of
+ * instances of classes with blank final fields, before they are
+ * made available for access by other parts of a program. Use in
+ * any other context may have unpredictable effects, including cases
+ * in which other parts of a program continue to use the original
+ * value of this field.
+ *
+ * <p>If the underlying field is of a primitive type, an unwrapping
+ * conversion is attempted to convert the new value to a value of
+ * a primitive type. If this attempt fails, the method throws an
+ * {@code IllegalArgumentException}.
+ *
+ * <p>If, after possible unwrapping, the new value cannot be
+ * converted to the type of the underlying field by an identity or
+ * widening conversion, the method throws an
+ * {@code IllegalArgumentException}.
+ *
+ * <p>If the underlying field is static, the class that declared the
+ * field is initialized if it has not already been initialized.
+ *
+ * <p>The field is set to the possibly unwrapped and widened new value.
+ *
+ * <p>If the field is hidden in the type of {@code obj},
+ * the field's value is set according to the preceding rules.
+ *
+ * @param obj the object whose field should be modified
+ * @param value the new value for the field of {@code obj}
+ * being modified
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof),
+ * or if an unwrapping conversion fails.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ */
+ public void set(Object obj, Object value)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ getFieldAccessor(obj).set(obj, value);
+ }
+
+ /**
+ * Sets the value of a field as a {@code boolean} on the specified object.
+ * This method is equivalent to
+ * {@code set(obj, zObj)},
+ * where {@code zObj} is a {@code Boolean} object and
+ * {@code zObj.booleanValue() == z}.
+ *
+ * @param obj the object whose field should be modified
+ * @param z the new value for the field of {@code obj}
+ * being modified
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof),
+ * or if an unwrapping conversion fails.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#set
+ */
+ public void setBoolean(Object obj, boolean z)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ getFieldAccessor(obj).setBoolean(obj, z);
+ }
+
+ /**
+ * Sets the value of a field as a {@code byte} on the specified object.
+ * This method is equivalent to
+ * {@code set(obj, bObj)},
+ * where {@code bObj} is a {@code Byte} object and
+ * {@code bObj.byteValue() == b}.
+ *
+ * @param obj the object whose field should be modified
+ * @param b the new value for the field of {@code obj}
+ * being modified
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof),
+ * or if an unwrapping conversion fails.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#set
+ */
+ public void setByte(Object obj, byte b)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ getFieldAccessor(obj).setByte(obj, b);
+ }
+
+ /**
+ * Sets the value of a field as a {@code char} on the specified object.
+ * This method is equivalent to
+ * {@code set(obj, cObj)},
+ * where {@code cObj} is a {@code Character} object and
+ * {@code cObj.charValue() == c}.
+ *
+ * @param obj the object whose field should be modified
+ * @param c the new value for the field of {@code obj}
+ * being modified
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof),
+ * or if an unwrapping conversion fails.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#set
+ */
+ public void setChar(Object obj, char c)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ getFieldAccessor(obj).setChar(obj, c);
+ }
+
+ /**
+ * Sets the value of a field as a {@code short} on the specified object.
+ * This method is equivalent to
+ * {@code set(obj, sObj)},
+ * where {@code sObj} is a {@code Short} object and
+ * {@code sObj.shortValue() == s}.
+ *
+ * @param obj the object whose field should be modified
+ * @param s the new value for the field of {@code obj}
+ * being modified
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof),
+ * or if an unwrapping conversion fails.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#set
+ */
+ public void setShort(Object obj, short s)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ getFieldAccessor(obj).setShort(obj, s);
+ }
+
+ /**
+ * Sets the value of a field as an {@code int} on the specified object.
+ * This method is equivalent to
+ * {@code set(obj, iObj)},
+ * where {@code iObj} is a {@code Integer} object and
+ * {@code iObj.intValue() == i}.
+ *
+ * @param obj the object whose field should be modified
+ * @param i the new value for the field of {@code obj}
+ * being modified
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof),
+ * or if an unwrapping conversion fails.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#set
+ */
+ public void setInt(Object obj, int i)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ getFieldAccessor(obj).setInt(obj, i);
+ }
+
+ /**
+ * Sets the value of a field as a {@code long} on the specified object.
+ * This method is equivalent to
+ * {@code set(obj, lObj)},
+ * where {@code lObj} is a {@code Long} object and
+ * {@code lObj.longValue() == l}.
+ *
+ * @param obj the object whose field should be modified
+ * @param l the new value for the field of {@code obj}
+ * being modified
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof),
+ * or if an unwrapping conversion fails.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#set
+ */
+ public void setLong(Object obj, long l)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ getFieldAccessor(obj).setLong(obj, l);
+ }
+
+ /**
+ * Sets the value of a field as a {@code float} on the specified object.
+ * This method is equivalent to
+ * {@code set(obj, fObj)},
+ * where {@code fObj} is a {@code Float} object and
+ * {@code fObj.floatValue() == f}.
+ *
+ * @param obj the object whose field should be modified
+ * @param f the new value for the field of {@code obj}
+ * being modified
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof),
+ * or if an unwrapping conversion fails.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#set
+ */
+ public void setFloat(Object obj, float f)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ getFieldAccessor(obj).setFloat(obj, f);
+ }
+
+ /**
+ * Sets the value of a field as a {@code double} on the specified object.
+ * This method is equivalent to
+ * {@code set(obj, dObj)},
+ * where {@code dObj} is a {@code Double} object and
+ * {@code dObj.doubleValue() == d}.
+ *
+ * @param obj the object whose field should be modified
+ * @param d the new value for the field of {@code obj}
+ * being modified
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof),
+ * or if an unwrapping conversion fails.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#set
+ */
+ public void setDouble(Object obj, double d)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ getFieldAccessor(obj).setDouble(obj, d);
+ }
+
+ // Convenience routine which performs security checks
+ private FieldAccessor getFieldAccessor(Object obj)
+ throws IllegalAccessException
+ {
+ doSecurityCheck(obj);
+ boolean ov = override;
+ FieldAccessor a = (ov)? overrideFieldAccessor : fieldAccessor;
+ return (a != null)? a : acquireFieldAccessor(ov);
+ }
+
+ // NOTE that there is no synchronization used here. It is correct
+ // (though not efficient) to generate more than one FieldAccessor
+ // for a given Field. However, avoiding synchronization will
+ // probably make the implementation more scalable.
+ private FieldAccessor acquireFieldAccessor(boolean overrideFinalCheck) {
+ // First check to see if one has been created yet, and take it
+ // if so
+ FieldAccessor tmp = null;
+ if (root != null) tmp = root.getFieldAccessor(overrideFinalCheck);
+ if (tmp != null) {
+ if (overrideFinalCheck)
+ overrideFieldAccessor = tmp;
+ else
+ fieldAccessor = tmp;
+ } else {
+ // Otherwise fabricate one and propagate it up to the root
+ tmp = reflectionFactory.newFieldAccessor(this, overrideFinalCheck);
+ setFieldAccessor(tmp, overrideFinalCheck);
+ }
+ return tmp;
+ }
+
+ // Returns FieldAccessor for this Field object, not looking up
+ // the chain to the root
+ private FieldAccessor getFieldAccessor(boolean overrideFinalCheck) {
+ return (overrideFinalCheck)? overrideFieldAccessor : fieldAccessor;
+ }
+
+ // Sets the FieldAccessor for this Field object and
+ // (recursively) its root
+ private void setFieldAccessor(FieldAccessor accessor, boolean overrideFinalCheck) {
+ if (overrideFinalCheck)
+ overrideFieldAccessor = accessor;
+ else
+ fieldAccessor = accessor;
+ // Propagate up
+ if (root != null) {
+ root.setFieldAccessor(accessor, overrideFinalCheck);
+ }
+ }
+
+ // NOTE: be very careful if you change the stack depth of this
+ // routine. The depth of the "getCallerClass" call is hardwired so
+ // that the compiler can have an easier time if this gets inlined.
+ private void doSecurityCheck(Object obj) throws IllegalAccessException {
+ if (!override) {
+ if (!Reflection.quickCheckMemberAccess(clazz, modifiers)) {
+ Class caller = Reflection.getCallerClass(4);
+ Class targetClass = ((obj == null || !Modifier.isProtected(modifiers))
+ ? clazz
+ : obj.getClass());
+
+ synchronized (this) {
+ if ((securityCheckCache == caller)
+ && (securityCheckTargetClassCache == targetClass)) {
+ return;
+ }
+ }
+ Reflection.ensureMemberAccess(caller, clazz, obj, modifiers);
+ synchronized (this) {
+ securityCheckCache = caller;
+ securityCheckTargetClassCache = targetClass;
+ }
+ }
+ }
+ }
+
+ /*
+ * Utility routine to paper over array type names
+ */
+ static String getTypeName(Class type) {
+ if (type.isArray()) {
+ try {
+ Class cl = type;
+ int dimensions = 0;
+ while (cl.isArray()) {
+ dimensions++;
+ cl = cl.getComponentType();
+ }
+ StringBuffer sb = new StringBuffer();
+ sb.append(cl.getName());
+ for (int i = 0; i < dimensions; i++) {
+ sb.append("[]");
+ }
+ return sb.toString();
+ } catch (Throwable e) { /*FALLTHRU*/ }
+ }
+ return type.getName();
+ }
+
+ /**
+ * @throws NullPointerException {@inheritDoc}
+ * @since 1.5
+ */
+ public <T extends Annotation> T getAnnotation(Class<T> annotationClass) {
+ if (annotationClass == null)
+ throw new NullPointerException();
+
+ return (T) declaredAnnotations().get(annotationClass);
+ }
+
+ private static final Annotation[] EMPTY_ANNOTATION_ARRAY=new Annotation[0];
+
+ /**
+ * @since 1.5
+ */
+ public Annotation[] getDeclaredAnnotations() {
+ return declaredAnnotations().values().toArray(EMPTY_ANNOTATION_ARRAY);
+ }
+
+ private transient Map<Class, Annotation> declaredAnnotations;
+
+ private synchronized Map<Class, Annotation> declaredAnnotations() {
+ if (declaredAnnotations == null) {
+ declaredAnnotations = AnnotationParser.parseAnnotations(
+ annotations, sun.misc.SharedSecrets.getJavaLangAccess().
+ getConstantPool(getDeclaringClass()),
+ getDeclaringClass());
+ }
+ return declaredAnnotations;
+ }
+}