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/*
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* Copyright (c) 1996, 2006, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.lang.reflect;
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import java.lang.annotation.Annotation;
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/**
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* A {@code Field} provides information about, and dynamic access to, a
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* single field of a class or an interface. The reflected field may
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* be a class (static) field or an instance field.
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*
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* <p>A {@code Field} permits widening conversions to occur during a get or
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* set access operation, but throws an {@code IllegalArgumentException} if a
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* narrowing conversion would occur.
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*
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* @see Member
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* @see java.lang.Class
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* @see java.lang.Class#getFields()
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* @see java.lang.Class#getField(String)
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* @see java.lang.Class#getDeclaredFields()
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* @see java.lang.Class#getDeclaredField(String)
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*
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* @author Kenneth Russell
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* @author Nakul Saraiya
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*/
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public final
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class Field extends AccessibleObject implements Member {
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private Class<?> clazz;
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private int slot;
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// This is guaranteed to be interned by the VM in the 1.4
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// reflection implementation
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private String name;
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private Class<?> type;
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private int modifiers;
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// Generics and annotations support
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private transient String signature;
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private byte[] annotations;
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// For sharing of FieldAccessors. This branching structure is
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// currently only two levels deep (i.e., one root Field and
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// potentially many Field objects pointing to it.)
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private Field root;
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// Generics infrastructure
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private String getGenericSignature() {return signature;}
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/**
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* Package-private constructor used by ReflectAccess to enable
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* instantiation of these objects in Java code from the java.lang
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* package via sun.reflect.LangReflectAccess.
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*/
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Field(Class<?> declaringClass,
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String name,
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Class<?> type,
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int modifiers,
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int slot,
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String signature,
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byte[] annotations)
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{
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this.clazz = declaringClass;
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this.name = name;
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this.type = type;
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this.modifiers = modifiers;
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this.slot = slot;
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this.signature = signature;
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this.annotations = annotations;
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}
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/**
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* Package-private routine (exposed to java.lang.Class via
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* ReflectAccess) which returns a copy of this Field. The copy's
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* "root" field points to this Field.
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*/
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Field copy() {
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// This routine enables sharing of FieldAccessor objects
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// among Field objects which refer to the same underlying
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// method in the VM. (All of this contortion is only necessary
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// because of the "accessibility" bit in AccessibleObject,
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// which implicitly requires that new java.lang.reflect
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// objects be fabricated for each reflective call on Class
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// objects.)
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Field res = new Field(clazz, name, type, modifiers, slot, signature, annotations);
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res.root = this;
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return res;
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}
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/**
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* Returns the {@code Class} object representing the class or interface
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* that declares the field represented by this {@code Field} object.
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*/
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public Class<?> getDeclaringClass() {
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return clazz;
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}
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/**
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* Returns the name of the field represented by this {@code Field} object.
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*/
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public String getName() {
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return name;
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}
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/**
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* Returns the Java language modifiers for the field represented
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* by this {@code Field} object, as an integer. The {@code Modifier} class should
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* be used to decode the modifiers.
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*
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* @see Modifier
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*/
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public int getModifiers() {
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return modifiers;
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}
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/**
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* Returns {@code true} if this field represents an element of
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* an enumerated type; returns {@code false} otherwise.
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*
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* @return {@code true} if and only if this field represents an element of
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* an enumerated type.
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* @since 1.5
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*/
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public boolean isEnumConstant() {
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return (getModifiers() & Modifier.ENUM) != 0;
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}
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/**
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* Returns {@code true} if this field is a synthetic
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* field; returns {@code false} otherwise.
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*
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* @return true if and only if this field is a synthetic
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* field as defined by the Java Language Specification.
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* @since 1.5
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*/
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public boolean isSynthetic() {
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return Modifier.isSynthetic(getModifiers());
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}
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/**
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* Returns a {@code Class} object that identifies the
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* declared type for the field represented by this
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* {@code Field} object.
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*
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* @return a {@code Class} object identifying the declared
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* type of the field represented by this object
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*/
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public Class<?> getType() {
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return type;
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}
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/**
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* Returns a {@code Type} object that represents the declared type for
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* the field represented by this {@code Field} object.
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*
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* <p>If the {@code Type} is a parameterized type, the
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* {@code Type} object returned must accurately reflect the
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* actual type parameters used in the source code.
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*
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* <p>If the type of the underlying field is a type variable or a
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* parameterized type, it is created. Otherwise, it is resolved.
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*
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* @return a {@code Type} object that represents the declared type for
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* the field represented by this {@code Field} object
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* @throws GenericSignatureFormatError if the generic field
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* signature does not conform to the format specified in
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* <cite>The Java™ Virtual Machine Specification</cite>
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* @throws TypeNotPresentException if the generic type
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* signature of the underlying field refers to a non-existent
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* type declaration
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* @throws MalformedParameterizedTypeException if the generic
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* signature of the underlying field refers to a parameterized type
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* that cannot be instantiated for any reason
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* @since 1.5
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*/
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public Type getGenericType() {
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throw new UnsupportedOperationException();
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}
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/**
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* Compares this {@code Field} against the specified object. Returns
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* true if the objects are the same. Two {@code Field} objects are the same if
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* they were declared by the same class and have the same name
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* and type.
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*/
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public boolean equals(Object obj) {
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if (obj != null && obj instanceof Field) {
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Field other = (Field)obj;
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return (getDeclaringClass() == other.getDeclaringClass())
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&& (getName() == other.getName())
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&& (getType() == other.getType());
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}
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return false;
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}
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/**
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* Returns a hashcode for this {@code Field}. This is computed as the
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* exclusive-or of the hashcodes for the underlying field's
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* declaring class name and its name.
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*/
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public int hashCode() {
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return getDeclaringClass().getName().hashCode() ^ getName().hashCode();
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}
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/**
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* Returns a string describing this {@code Field}. The format is
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* the access modifiers for the field, if any, followed
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* by the field type, followed by a space, followed by
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* the fully-qualified name of the class declaring the field,
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* followed by a period, followed by the name of the field.
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* For example:
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* <pre>
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* public static final int java.lang.Thread.MIN_PRIORITY
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* private int java.io.FileDescriptor.fd
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* </pre>
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*
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* <p>The modifiers are placed in canonical order as specified by
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* "The Java Language Specification". This is {@code public},
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* {@code protected} or {@code private} first, and then other
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* modifiers in the following order: {@code static}, {@code final},
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* {@code transient}, {@code volatile}.
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*/
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public String toString() {
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int mod = getModifiers();
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return (((mod == 0) ? "" : (Modifier.toString(mod) + " "))
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+ getTypeName(getType()) + " "
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+ getTypeName(getDeclaringClass()) + "."
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+ getName());
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}
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/**
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* Returns a string describing this {@code Field}, including
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* its generic type. The format is the access modifiers for the
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* field, if any, followed by the generic field type, followed by
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* a space, followed by the fully-qualified name of the class
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* declaring the field, followed by a period, followed by the name
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* of the field.
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*
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* <p>The modifiers are placed in canonical order as specified by
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* "The Java Language Specification". This is {@code public},
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* {@code protected} or {@code private} first, and then other
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* modifiers in the following order: {@code static}, {@code final},
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* {@code transient}, {@code volatile}.
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*
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* @return a string describing this {@code Field}, including
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* its generic type
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*
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* @since 1.5
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*/
|
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public String toGenericString() {
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int mod = getModifiers();
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Type fieldType = getGenericType();
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return (((mod == 0) ? "" : (Modifier.toString(mod) + " "))
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+ ((fieldType instanceof Class) ?
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getTypeName((Class)fieldType): fieldType.toString())+ " "
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+ getTypeName(getDeclaringClass()) + "."
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+ getName());
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|
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}
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/**
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|
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* Returns the value of the field represented by this {@code Field}, on
|
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286 |
* the specified object. The value is automatically wrapped in an
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* object if it has a primitive type.
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*
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* <p>The underlying field's value is obtained as follows:
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*
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* <p>If the underlying field is a static field, the {@code obj} argument
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* is ignored; it may be null.
|
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|
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*
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|
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* <p>Otherwise, the underlying field is an instance field. If the
|
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|
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* specified {@code obj} argument is null, the method throws a
|
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|
296 |
* {@code NullPointerException}. If the specified object is not an
|
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297 |
* instance of the class or interface declaring the underlying
|
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|
298 |
* field, the method throws an {@code IllegalArgumentException}.
|
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|
299 |
*
|
jtulach@258
|
300 |
* <p>If this {@code Field} object is enforcing Java language access control, and
|
jtulach@258
|
301 |
* the underlying field is inaccessible, the method throws an
|
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|
302 |
* {@code IllegalAccessException}.
|
jtulach@258
|
303 |
* If the underlying field is static, the class that declared the
|
jtulach@258
|
304 |
* field is initialized if it has not already been initialized.
|
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|
305 |
*
|
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|
306 |
* <p>Otherwise, the value is retrieved from the underlying instance
|
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|
307 |
* or static field. If the field has a primitive type, the value
|
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|
308 |
* is wrapped in an object before being returned, otherwise it is
|
jtulach@258
|
309 |
* returned as is.
|
jtulach@258
|
310 |
*
|
jtulach@258
|
311 |
* <p>If the field is hidden in the type of {@code obj},
|
jtulach@258
|
312 |
* the field's value is obtained according to the preceding rules.
|
jtulach@258
|
313 |
*
|
jtulach@258
|
314 |
* @param obj object from which the represented field's value is
|
jtulach@258
|
315 |
* to be extracted
|
jtulach@258
|
316 |
* @return the value of the represented field in object
|
jtulach@258
|
317 |
* {@code obj}; primitive values are wrapped in an appropriate
|
jtulach@258
|
318 |
* object before being returned
|
jtulach@258
|
319 |
*
|
jtulach@258
|
320 |
* @exception IllegalAccessException if this {@code Field} object
|
jtulach@258
|
321 |
* is enforcing Java language access control and the underlying
|
jtulach@258
|
322 |
* field is inaccessible.
|
jtulach@258
|
323 |
* @exception IllegalArgumentException if the specified object is not an
|
jtulach@258
|
324 |
* instance of the class or interface declaring the underlying
|
jtulach@258
|
325 |
* field (or a subclass or implementor thereof).
|
jtulach@258
|
326 |
* @exception NullPointerException if the specified object is null
|
jtulach@258
|
327 |
* and the field is an instance field.
|
jtulach@258
|
328 |
* @exception ExceptionInInitializerError if the initialization provoked
|
jtulach@258
|
329 |
* by this method fails.
|
jtulach@258
|
330 |
*/
|
jtulach@258
|
331 |
public Object get(Object obj)
|
jtulach@258
|
332 |
throws IllegalArgumentException, IllegalAccessException
|
jtulach@258
|
333 |
{
|
jtulach@258
|
334 |
return getFieldAccessor(obj).get(obj);
|
jtulach@258
|
335 |
}
|
jtulach@258
|
336 |
|
jtulach@258
|
337 |
/**
|
jtulach@258
|
338 |
* Gets the value of a static or instance {@code boolean} field.
|
jtulach@258
|
339 |
*
|
jtulach@258
|
340 |
* @param obj the object to extract the {@code boolean} value
|
jtulach@258
|
341 |
* from
|
jtulach@258
|
342 |
* @return the value of the {@code boolean} field
|
jtulach@258
|
343 |
*
|
jtulach@258
|
344 |
* @exception IllegalAccessException if this {@code Field} object
|
jtulach@258
|
345 |
* is enforcing Java language access control and the underlying
|
jtulach@258
|
346 |
* field is inaccessible.
|
jtulach@258
|
347 |
* @exception IllegalArgumentException if the specified object is not
|
jtulach@258
|
348 |
* an instance of the class or interface declaring the
|
jtulach@258
|
349 |
* underlying field (or a subclass or implementor
|
jtulach@258
|
350 |
* thereof), or if the field value cannot be
|
jtulach@258
|
351 |
* converted to the type {@code boolean} by a
|
jtulach@258
|
352 |
* widening conversion.
|
jtulach@258
|
353 |
* @exception NullPointerException if the specified object is null
|
jtulach@258
|
354 |
* and the field is an instance field.
|
jtulach@258
|
355 |
* @exception ExceptionInInitializerError if the initialization provoked
|
jtulach@258
|
356 |
* by this method fails.
|
jtulach@258
|
357 |
* @see Field#get
|
jtulach@258
|
358 |
*/
|
jtulach@258
|
359 |
public boolean getBoolean(Object obj)
|
jtulach@258
|
360 |
throws IllegalArgumentException, IllegalAccessException
|
jtulach@258
|
361 |
{
|
jtulach@258
|
362 |
return getFieldAccessor(obj).getBoolean(obj);
|
jtulach@258
|
363 |
}
|
jtulach@258
|
364 |
|
jtulach@258
|
365 |
/**
|
jtulach@258
|
366 |
* Gets the value of a static or instance {@code byte} field.
|
jtulach@258
|
367 |
*
|
jtulach@258
|
368 |
* @param obj the object to extract the {@code byte} value
|
jtulach@258
|
369 |
* from
|
jtulach@258
|
370 |
* @return the value of the {@code byte} field
|
jtulach@258
|
371 |
*
|
jtulach@258
|
372 |
* @exception IllegalAccessException if this {@code Field} object
|
jtulach@258
|
373 |
* is enforcing Java language access control and the underlying
|
jtulach@258
|
374 |
* field is inaccessible.
|
jtulach@258
|
375 |
* @exception IllegalArgumentException if the specified object is not
|
jtulach@258
|
376 |
* an instance of the class or interface declaring the
|
jtulach@258
|
377 |
* underlying field (or a subclass or implementor
|
jtulach@258
|
378 |
* thereof), or if the field value cannot be
|
jtulach@258
|
379 |
* converted to the type {@code byte} by a
|
jtulach@258
|
380 |
* widening conversion.
|
jtulach@258
|
381 |
* @exception NullPointerException if the specified object is null
|
jtulach@258
|
382 |
* and the field is an instance field.
|
jtulach@258
|
383 |
* @exception ExceptionInInitializerError if the initialization provoked
|
jtulach@258
|
384 |
* by this method fails.
|
jtulach@258
|
385 |
* @see Field#get
|
jtulach@258
|
386 |
*/
|
jtulach@258
|
387 |
public byte getByte(Object obj)
|
jtulach@258
|
388 |
throws IllegalArgumentException, IllegalAccessException
|
jtulach@258
|
389 |
{
|
jtulach@258
|
390 |
return getFieldAccessor(obj).getByte(obj);
|
jtulach@258
|
391 |
}
|
jtulach@258
|
392 |
|
jtulach@258
|
393 |
/**
|
jtulach@258
|
394 |
* Gets the value of a static or instance field of type
|
jtulach@258
|
395 |
* {@code char} or of another primitive type convertible to
|
jtulach@258
|
396 |
* type {@code char} via a widening conversion.
|
jtulach@258
|
397 |
*
|
jtulach@258
|
398 |
* @param obj the object to extract the {@code char} value
|
jtulach@258
|
399 |
* from
|
jtulach@258
|
400 |
* @return the value of the field converted to type {@code char}
|
jtulach@258
|
401 |
*
|
jtulach@258
|
402 |
* @exception IllegalAccessException if this {@code Field} object
|
jtulach@258
|
403 |
* is enforcing Java language access control and the underlying
|
jtulach@258
|
404 |
* field is inaccessible.
|
jtulach@258
|
405 |
* @exception IllegalArgumentException if the specified object is not
|
jtulach@258
|
406 |
* an instance of the class or interface declaring the
|
jtulach@258
|
407 |
* underlying field (or a subclass or implementor
|
jtulach@258
|
408 |
* thereof), or if the field value cannot be
|
jtulach@258
|
409 |
* converted to the type {@code char} by a
|
jtulach@258
|
410 |
* widening conversion.
|
jtulach@258
|
411 |
* @exception NullPointerException if the specified object is null
|
jtulach@258
|
412 |
* and the field is an instance field.
|
jtulach@258
|
413 |
* @exception ExceptionInInitializerError if the initialization provoked
|
jtulach@258
|
414 |
* by this method fails.
|
jtulach@258
|
415 |
* @see Field#get
|
jtulach@258
|
416 |
*/
|
jtulach@258
|
417 |
public char getChar(Object obj)
|
jtulach@258
|
418 |
throws IllegalArgumentException, IllegalAccessException
|
jtulach@258
|
419 |
{
|
jtulach@258
|
420 |
return getFieldAccessor(obj).getChar(obj);
|
jtulach@258
|
421 |
}
|
jtulach@258
|
422 |
|
jtulach@258
|
423 |
/**
|
jtulach@258
|
424 |
* Gets the value of a static or instance field of type
|
jtulach@258
|
425 |
* {@code short} or of another primitive type convertible to
|
jtulach@258
|
426 |
* type {@code short} via a widening conversion.
|
jtulach@258
|
427 |
*
|
jtulach@258
|
428 |
* @param obj the object to extract the {@code short} value
|
jtulach@258
|
429 |
* from
|
jtulach@258
|
430 |
* @return the value of the field converted to type {@code short}
|
jtulach@258
|
431 |
*
|
jtulach@258
|
432 |
* @exception IllegalAccessException if this {@code Field} object
|
jtulach@258
|
433 |
* is enforcing Java language access control and the underlying
|
jtulach@258
|
434 |
* field is inaccessible.
|
jtulach@258
|
435 |
* @exception IllegalArgumentException if the specified object is not
|
jtulach@258
|
436 |
* an instance of the class or interface declaring the
|
jtulach@258
|
437 |
* underlying field (or a subclass or implementor
|
jtulach@258
|
438 |
* thereof), or if the field value cannot be
|
jtulach@258
|
439 |
* converted to the type {@code short} by a
|
jtulach@258
|
440 |
* widening conversion.
|
jtulach@258
|
441 |
* @exception NullPointerException if the specified object is null
|
jtulach@258
|
442 |
* and the field is an instance field.
|
jtulach@258
|
443 |
* @exception ExceptionInInitializerError if the initialization provoked
|
jtulach@258
|
444 |
* by this method fails.
|
jtulach@258
|
445 |
* @see Field#get
|
jtulach@258
|
446 |
*/
|
jtulach@258
|
447 |
public short getShort(Object obj)
|
jtulach@258
|
448 |
throws IllegalArgumentException, IllegalAccessException
|
jtulach@258
|
449 |
{
|
jtulach@258
|
450 |
return getFieldAccessor(obj).getShort(obj);
|
jtulach@258
|
451 |
}
|
jtulach@258
|
452 |
|
jtulach@258
|
453 |
/**
|
jtulach@258
|
454 |
* Gets the value of a static or instance field of type
|
jtulach@258
|
455 |
* {@code int} or of another primitive type convertible to
|
jtulach@258
|
456 |
* type {@code int} via a widening conversion.
|
jtulach@258
|
457 |
*
|
jtulach@258
|
458 |
* @param obj the object to extract the {@code int} value
|
jtulach@258
|
459 |
* from
|
jtulach@258
|
460 |
* @return the value of the field converted to type {@code int}
|
jtulach@258
|
461 |
*
|
jtulach@258
|
462 |
* @exception IllegalAccessException if this {@code Field} object
|
jtulach@258
|
463 |
* is enforcing Java language access control and the underlying
|
jtulach@258
|
464 |
* field is inaccessible.
|
jtulach@258
|
465 |
* @exception IllegalArgumentException if the specified object is not
|
jtulach@258
|
466 |
* an instance of the class or interface declaring the
|
jtulach@258
|
467 |
* underlying field (or a subclass or implementor
|
jtulach@258
|
468 |
* thereof), or if the field value cannot be
|
jtulach@258
|
469 |
* converted to the type {@code int} by a
|
jtulach@258
|
470 |
* widening conversion.
|
jtulach@258
|
471 |
* @exception NullPointerException if the specified object is null
|
jtulach@258
|
472 |
* and the field is an instance field.
|
jtulach@258
|
473 |
* @exception ExceptionInInitializerError if the initialization provoked
|
jtulach@258
|
474 |
* by this method fails.
|
jtulach@258
|
475 |
* @see Field#get
|
jtulach@258
|
476 |
*/
|
jtulach@258
|
477 |
public int getInt(Object obj)
|
jtulach@258
|
478 |
throws IllegalArgumentException, IllegalAccessException
|
jtulach@258
|
479 |
{
|
jtulach@258
|
480 |
return getFieldAccessor(obj).getInt(obj);
|
jtulach@258
|
481 |
}
|
jtulach@258
|
482 |
|
jtulach@258
|
483 |
/**
|
jtulach@258
|
484 |
* Gets the value of a static or instance field of type
|
jtulach@258
|
485 |
* {@code long} or of another primitive type convertible to
|
jtulach@258
|
486 |
* type {@code long} via a widening conversion.
|
jtulach@258
|
487 |
*
|
jtulach@258
|
488 |
* @param obj the object to extract the {@code long} value
|
jtulach@258
|
489 |
* from
|
jtulach@258
|
490 |
* @return the value of the field converted to type {@code long}
|
jtulach@258
|
491 |
*
|
jtulach@258
|
492 |
* @exception IllegalAccessException if this {@code Field} object
|
jtulach@258
|
493 |
* is enforcing Java language access control and the underlying
|
jtulach@258
|
494 |
* field is inaccessible.
|
jtulach@258
|
495 |
* @exception IllegalArgumentException if the specified object is not
|
jtulach@258
|
496 |
* an instance of the class or interface declaring the
|
jtulach@258
|
497 |
* underlying field (or a subclass or implementor
|
jtulach@258
|
498 |
* thereof), or if the field value cannot be
|
jtulach@258
|
499 |
* converted to the type {@code long} by a
|
jtulach@258
|
500 |
* widening conversion.
|
jtulach@258
|
501 |
* @exception NullPointerException if the specified object is null
|
jtulach@258
|
502 |
* and the field is an instance field.
|
jtulach@258
|
503 |
* @exception ExceptionInInitializerError if the initialization provoked
|
jtulach@258
|
504 |
* by this method fails.
|
jtulach@258
|
505 |
* @see Field#get
|
jtulach@258
|
506 |
*/
|
jtulach@258
|
507 |
public long getLong(Object obj)
|
jtulach@258
|
508 |
throws IllegalArgumentException, IllegalAccessException
|
jtulach@258
|
509 |
{
|
jtulach@258
|
510 |
return getFieldAccessor(obj).getLong(obj);
|
jtulach@258
|
511 |
}
|
jtulach@258
|
512 |
|
jtulach@258
|
513 |
/**
|
jtulach@258
|
514 |
* Gets the value of a static or instance field of type
|
jtulach@258
|
515 |
* {@code float} or of another primitive type convertible to
|
jtulach@258
|
516 |
* type {@code float} via a widening conversion.
|
jtulach@258
|
517 |
*
|
jtulach@258
|
518 |
* @param obj the object to extract the {@code float} value
|
jtulach@258
|
519 |
* from
|
jtulach@258
|
520 |
* @return the value of the field converted to type {@code float}
|
jtulach@258
|
521 |
*
|
jtulach@258
|
522 |
* @exception IllegalAccessException if this {@code Field} object
|
jtulach@258
|
523 |
* is enforcing Java language access control and the underlying
|
jtulach@258
|
524 |
* field is inaccessible.
|
jtulach@258
|
525 |
* @exception IllegalArgumentException if the specified object is not
|
jtulach@258
|
526 |
* an instance of the class or interface declaring the
|
jtulach@258
|
527 |
* underlying field (or a subclass or implementor
|
jtulach@258
|
528 |
* thereof), or if the field value cannot be
|
jtulach@258
|
529 |
* converted to the type {@code float} by a
|
jtulach@258
|
530 |
* widening conversion.
|
jtulach@258
|
531 |
* @exception NullPointerException if the specified object is null
|
jtulach@258
|
532 |
* and the field is an instance field.
|
jtulach@258
|
533 |
* @exception ExceptionInInitializerError if the initialization provoked
|
jtulach@258
|
534 |
* by this method fails.
|
jtulach@258
|
535 |
* @see Field#get
|
jtulach@258
|
536 |
*/
|
jtulach@258
|
537 |
public float getFloat(Object obj)
|
jtulach@258
|
538 |
throws IllegalArgumentException, IllegalAccessException
|
jtulach@258
|
539 |
{
|
jtulach@258
|
540 |
return getFieldAccessor(obj).getFloat(obj);
|
jtulach@258
|
541 |
}
|
jtulach@258
|
542 |
|
jtulach@258
|
543 |
/**
|
jtulach@258
|
544 |
* Gets the value of a static or instance field of type
|
jtulach@258
|
545 |
* {@code double} or of another primitive type convertible to
|
jtulach@258
|
546 |
* type {@code double} via a widening conversion.
|
jtulach@258
|
547 |
*
|
jtulach@258
|
548 |
* @param obj the object to extract the {@code double} value
|
jtulach@258
|
549 |
* from
|
jtulach@258
|
550 |
* @return the value of the field converted to type {@code double}
|
jtulach@258
|
551 |
*
|
jtulach@258
|
552 |
* @exception IllegalAccessException if this {@code Field} object
|
jtulach@258
|
553 |
* is enforcing Java language access control and the underlying
|
jtulach@258
|
554 |
* field is inaccessible.
|
jtulach@258
|
555 |
* @exception IllegalArgumentException if the specified object is not
|
jtulach@258
|
556 |
* an instance of the class or interface declaring the
|
jtulach@258
|
557 |
* underlying field (or a subclass or implementor
|
jtulach@258
|
558 |
* thereof), or if the field value cannot be
|
jtulach@258
|
559 |
* converted to the type {@code double} by a
|
jtulach@258
|
560 |
* widening conversion.
|
jtulach@258
|
561 |
* @exception NullPointerException if the specified object is null
|
jtulach@258
|
562 |
* and the field is an instance field.
|
jtulach@258
|
563 |
* @exception ExceptionInInitializerError if the initialization provoked
|
jtulach@258
|
564 |
* by this method fails.
|
jtulach@258
|
565 |
* @see Field#get
|
jtulach@258
|
566 |
*/
|
jtulach@258
|
567 |
public double getDouble(Object obj)
|
jtulach@258
|
568 |
throws IllegalArgumentException, IllegalAccessException
|
jtulach@258
|
569 |
{
|
jtulach@258
|
570 |
return getFieldAccessor(obj).getDouble(obj);
|
jtulach@258
|
571 |
}
|
jtulach@258
|
572 |
|
jtulach@258
|
573 |
/**
|
jtulach@258
|
574 |
* Sets the field represented by this {@code Field} object on the
|
jtulach@258
|
575 |
* specified object argument to the specified new value. The new
|
jtulach@258
|
576 |
* value is automatically unwrapped if the underlying field has a
|
jtulach@258
|
577 |
* primitive type.
|
jtulach@258
|
578 |
*
|
jtulach@258
|
579 |
* <p>The operation proceeds as follows:
|
jtulach@258
|
580 |
*
|
jtulach@258
|
581 |
* <p>If the underlying field is static, the {@code obj} argument is
|
jtulach@258
|
582 |
* ignored; it may be null.
|
jtulach@258
|
583 |
*
|
jtulach@258
|
584 |
* <p>Otherwise the underlying field is an instance field. If the
|
jtulach@258
|
585 |
* specified object argument is null, the method throws a
|
jtulach@258
|
586 |
* {@code NullPointerException}. If the specified object argument is not
|
jtulach@258
|
587 |
* an instance of the class or interface declaring the underlying
|
jtulach@258
|
588 |
* field, the method throws an {@code IllegalArgumentException}.
|
jtulach@258
|
589 |
*
|
jtulach@258
|
590 |
* <p>If this {@code Field} object is enforcing Java language access control, and
|
jtulach@258
|
591 |
* the underlying field is inaccessible, the method throws an
|
jtulach@258
|
592 |
* {@code IllegalAccessException}.
|
jtulach@258
|
593 |
*
|
jtulach@258
|
594 |
* <p>If the underlying field is final, the method throws an
|
jtulach@258
|
595 |
* {@code IllegalAccessException} unless {@code setAccessible(true)}
|
jtulach@258
|
596 |
* has succeeded for this {@code Field} object
|
jtulach@258
|
597 |
* and the field is non-static. Setting a final field in this way
|
jtulach@258
|
598 |
* is meaningful only during deserialization or reconstruction of
|
jtulach@258
|
599 |
* instances of classes with blank final fields, before they are
|
jtulach@258
|
600 |
* made available for access by other parts of a program. Use in
|
jtulach@258
|
601 |
* any other context may have unpredictable effects, including cases
|
jtulach@258
|
602 |
* in which other parts of a program continue to use the original
|
jtulach@258
|
603 |
* value of this field.
|
jtulach@258
|
604 |
*
|
jtulach@258
|
605 |
* <p>If the underlying field is of a primitive type, an unwrapping
|
jtulach@258
|
606 |
* conversion is attempted to convert the new value to a value of
|
jtulach@258
|
607 |
* a primitive type. If this attempt fails, the method throws an
|
jtulach@258
|
608 |
* {@code IllegalArgumentException}.
|
jtulach@258
|
609 |
*
|
jtulach@258
|
610 |
* <p>If, after possible unwrapping, the new value cannot be
|
jtulach@258
|
611 |
* converted to the type of the underlying field by an identity or
|
jtulach@258
|
612 |
* widening conversion, the method throws an
|
jtulach@258
|
613 |
* {@code IllegalArgumentException}.
|
jtulach@258
|
614 |
*
|
jtulach@258
|
615 |
* <p>If the underlying field is static, the class that declared the
|
jtulach@258
|
616 |
* field is initialized if it has not already been initialized.
|
jtulach@258
|
617 |
*
|
jtulach@258
|
618 |
* <p>The field is set to the possibly unwrapped and widened new value.
|
jtulach@258
|
619 |
*
|
jtulach@258
|
620 |
* <p>If the field is hidden in the type of {@code obj},
|
jtulach@258
|
621 |
* the field's value is set according to the preceding rules.
|
jtulach@258
|
622 |
*
|
jtulach@258
|
623 |
* @param obj the object whose field should be modified
|
jtulach@258
|
624 |
* @param value the new value for the field of {@code obj}
|
jtulach@258
|
625 |
* being modified
|
jtulach@258
|
626 |
*
|
jtulach@258
|
627 |
* @exception IllegalAccessException if this {@code Field} object
|
jtulach@258
|
628 |
* is enforcing Java language access control and the underlying
|
jtulach@258
|
629 |
* field is either inaccessible or final.
|
jtulach@258
|
630 |
* @exception IllegalArgumentException if the specified object is not an
|
jtulach@258
|
631 |
* instance of the class or interface declaring the underlying
|
jtulach@258
|
632 |
* field (or a subclass or implementor thereof),
|
jtulach@258
|
633 |
* or if an unwrapping conversion fails.
|
jtulach@258
|
634 |
* @exception NullPointerException if the specified object is null
|
jtulach@258
|
635 |
* and the field is an instance field.
|
jtulach@258
|
636 |
* @exception ExceptionInInitializerError if the initialization provoked
|
jtulach@258
|
637 |
* by this method fails.
|
jtulach@258
|
638 |
*/
|
jtulach@258
|
639 |
public void set(Object obj, Object value)
|
jtulach@258
|
640 |
throws IllegalArgumentException, IllegalAccessException
|
jtulach@258
|
641 |
{
|
jtulach@258
|
642 |
getFieldAccessor(obj).set(obj, value);
|
jtulach@258
|
643 |
}
|
jtulach@258
|
644 |
|
jtulach@258
|
645 |
/**
|
jtulach@258
|
646 |
* Sets the value of a field as a {@code boolean} on the specified object.
|
jtulach@258
|
647 |
* This method is equivalent to
|
jtulach@258
|
648 |
* {@code set(obj, zObj)},
|
jtulach@258
|
649 |
* where {@code zObj} is a {@code Boolean} object and
|
jtulach@258
|
650 |
* {@code zObj.booleanValue() == z}.
|
jtulach@258
|
651 |
*
|
jtulach@258
|
652 |
* @param obj the object whose field should be modified
|
jtulach@258
|
653 |
* @param z the new value for the field of {@code obj}
|
jtulach@258
|
654 |
* being modified
|
jtulach@258
|
655 |
*
|
jtulach@258
|
656 |
* @exception IllegalAccessException if this {@code Field} object
|
jtulach@258
|
657 |
* is enforcing Java language access control and the underlying
|
jtulach@258
|
658 |
* field is either inaccessible or final.
|
jtulach@258
|
659 |
* @exception IllegalArgumentException if the specified object is not an
|
jtulach@258
|
660 |
* instance of the class or interface declaring the underlying
|
jtulach@258
|
661 |
* field (or a subclass or implementor thereof),
|
jtulach@258
|
662 |
* or if an unwrapping conversion fails.
|
jtulach@258
|
663 |
* @exception NullPointerException if the specified object is null
|
jtulach@258
|
664 |
* and the field is an instance field.
|
jtulach@258
|
665 |
* @exception ExceptionInInitializerError if the initialization provoked
|
jtulach@258
|
666 |
* by this method fails.
|
jtulach@258
|
667 |
* @see Field#set
|
jtulach@258
|
668 |
*/
|
jtulach@258
|
669 |
public void setBoolean(Object obj, boolean z)
|
jtulach@258
|
670 |
throws IllegalArgumentException, IllegalAccessException
|
jtulach@258
|
671 |
{
|
jtulach@258
|
672 |
getFieldAccessor(obj).setBoolean(obj, z);
|
jtulach@258
|
673 |
}
|
jtulach@258
|
674 |
|
jtulach@258
|
675 |
/**
|
jtulach@258
|
676 |
* Sets the value of a field as a {@code byte} on the specified object.
|
jtulach@258
|
677 |
* This method is equivalent to
|
jtulach@258
|
678 |
* {@code set(obj, bObj)},
|
jtulach@258
|
679 |
* where {@code bObj} is a {@code Byte} object and
|
jtulach@258
|
680 |
* {@code bObj.byteValue() == b}.
|
jtulach@258
|
681 |
*
|
jtulach@258
|
682 |
* @param obj the object whose field should be modified
|
jtulach@258
|
683 |
* @param b the new value for the field of {@code obj}
|
jtulach@258
|
684 |
* being modified
|
jtulach@258
|
685 |
*
|
jtulach@258
|
686 |
* @exception IllegalAccessException if this {@code Field} object
|
jtulach@258
|
687 |
* is enforcing Java language access control and the underlying
|
jtulach@258
|
688 |
* field is either inaccessible or final.
|
jtulach@258
|
689 |
* @exception IllegalArgumentException if the specified object is not an
|
jtulach@258
|
690 |
* instance of the class or interface declaring the underlying
|
jtulach@258
|
691 |
* field (or a subclass or implementor thereof),
|
jtulach@258
|
692 |
* or if an unwrapping conversion fails.
|
jtulach@258
|
693 |
* @exception NullPointerException if the specified object is null
|
jtulach@258
|
694 |
* and the field is an instance field.
|
jtulach@258
|
695 |
* @exception ExceptionInInitializerError if the initialization provoked
|
jtulach@258
|
696 |
* by this method fails.
|
jtulach@258
|
697 |
* @see Field#set
|
jtulach@258
|
698 |
*/
|
jtulach@258
|
699 |
public void setByte(Object obj, byte b)
|
jtulach@258
|
700 |
throws IllegalArgumentException, IllegalAccessException
|
jtulach@258
|
701 |
{
|
jtulach@258
|
702 |
getFieldAccessor(obj).setByte(obj, b);
|
jtulach@258
|
703 |
}
|
jtulach@258
|
704 |
|
jtulach@258
|
705 |
/**
|
jtulach@258
|
706 |
* Sets the value of a field as a {@code char} on the specified object.
|
jtulach@258
|
707 |
* This method is equivalent to
|
jtulach@258
|
708 |
* {@code set(obj, cObj)},
|
jtulach@258
|
709 |
* where {@code cObj} is a {@code Character} object and
|
jtulach@258
|
710 |
* {@code cObj.charValue() == c}.
|
jtulach@258
|
711 |
*
|
jtulach@258
|
712 |
* @param obj the object whose field should be modified
|
jtulach@258
|
713 |
* @param c the new value for the field of {@code obj}
|
jtulach@258
|
714 |
* being modified
|
jtulach@258
|
715 |
*
|
jtulach@258
|
716 |
* @exception IllegalAccessException if this {@code Field} object
|
jtulach@258
|
717 |
* is enforcing Java language access control and the underlying
|
jtulach@258
|
718 |
* field is either inaccessible or final.
|
jtulach@258
|
719 |
* @exception IllegalArgumentException if the specified object is not an
|
jtulach@258
|
720 |
* instance of the class or interface declaring the underlying
|
jtulach@258
|
721 |
* field (or a subclass or implementor thereof),
|
jtulach@258
|
722 |
* or if an unwrapping conversion fails.
|
jtulach@258
|
723 |
* @exception NullPointerException if the specified object is null
|
jtulach@258
|
724 |
* and the field is an instance field.
|
jtulach@258
|
725 |
* @exception ExceptionInInitializerError if the initialization provoked
|
jtulach@258
|
726 |
* by this method fails.
|
jtulach@258
|
727 |
* @see Field#set
|
jtulach@258
|
728 |
*/
|
jtulach@258
|
729 |
public void setChar(Object obj, char c)
|
jtulach@258
|
730 |
throws IllegalArgumentException, IllegalAccessException
|
jtulach@258
|
731 |
{
|
jtulach@258
|
732 |
getFieldAccessor(obj).setChar(obj, c);
|
jtulach@258
|
733 |
}
|
jtulach@258
|
734 |
|
jtulach@258
|
735 |
/**
|
jtulach@258
|
736 |
* Sets the value of a field as a {@code short} on the specified object.
|
jtulach@258
|
737 |
* This method is equivalent to
|
jtulach@258
|
738 |
* {@code set(obj, sObj)},
|
jtulach@258
|
739 |
* where {@code sObj} is a {@code Short} object and
|
jtulach@258
|
740 |
* {@code sObj.shortValue() == s}.
|
jtulach@258
|
741 |
*
|
jtulach@258
|
742 |
* @param obj the object whose field should be modified
|
jtulach@258
|
743 |
* @param s the new value for the field of {@code obj}
|
jtulach@258
|
744 |
* being modified
|
jtulach@258
|
745 |
*
|
jtulach@258
|
746 |
* @exception IllegalAccessException if this {@code Field} object
|
jtulach@258
|
747 |
* is enforcing Java language access control and the underlying
|
jtulach@258
|
748 |
* field is either inaccessible or final.
|
jtulach@258
|
749 |
* @exception IllegalArgumentException if the specified object is not an
|
jtulach@258
|
750 |
* instance of the class or interface declaring the underlying
|
jtulach@258
|
751 |
* field (or a subclass or implementor thereof),
|
jtulach@258
|
752 |
* or if an unwrapping conversion fails.
|
jtulach@258
|
753 |
* @exception NullPointerException if the specified object is null
|
jtulach@258
|
754 |
* and the field is an instance field.
|
jtulach@258
|
755 |
* @exception ExceptionInInitializerError if the initialization provoked
|
jtulach@258
|
756 |
* by this method fails.
|
jtulach@258
|
757 |
* @see Field#set
|
jtulach@258
|
758 |
*/
|
jtulach@258
|
759 |
public void setShort(Object obj, short s)
|
jtulach@258
|
760 |
throws IllegalArgumentException, IllegalAccessException
|
jtulach@258
|
761 |
{
|
jtulach@258
|
762 |
getFieldAccessor(obj).setShort(obj, s);
|
jtulach@258
|
763 |
}
|
jtulach@258
|
764 |
|
jtulach@258
|
765 |
/**
|
jtulach@258
|
766 |
* Sets the value of a field as an {@code int} on the specified object.
|
jtulach@258
|
767 |
* This method is equivalent to
|
jtulach@258
|
768 |
* {@code set(obj, iObj)},
|
jtulach@258
|
769 |
* where {@code iObj} is a {@code Integer} object and
|
jtulach@258
|
770 |
* {@code iObj.intValue() == i}.
|
jtulach@258
|
771 |
*
|
jtulach@258
|
772 |
* @param obj the object whose field should be modified
|
jtulach@258
|
773 |
* @param i the new value for the field of {@code obj}
|
jtulach@258
|
774 |
* being modified
|
jtulach@258
|
775 |
*
|
jtulach@258
|
776 |
* @exception IllegalAccessException if this {@code Field} object
|
jtulach@258
|
777 |
* is enforcing Java language access control and the underlying
|
jtulach@258
|
778 |
* field is either inaccessible or final.
|
jtulach@258
|
779 |
* @exception IllegalArgumentException if the specified object is not an
|
jtulach@258
|
780 |
* instance of the class or interface declaring the underlying
|
jtulach@258
|
781 |
* field (or a subclass or implementor thereof),
|
jtulach@258
|
782 |
* or if an unwrapping conversion fails.
|
jtulach@258
|
783 |
* @exception NullPointerException if the specified object is null
|
jtulach@258
|
784 |
* and the field is an instance field.
|
jtulach@258
|
785 |
* @exception ExceptionInInitializerError if the initialization provoked
|
jtulach@258
|
786 |
* by this method fails.
|
jtulach@258
|
787 |
* @see Field#set
|
jtulach@258
|
788 |
*/
|
jtulach@258
|
789 |
public void setInt(Object obj, int i)
|
jtulach@258
|
790 |
throws IllegalArgumentException, IllegalAccessException
|
jtulach@258
|
791 |
{
|
jtulach@258
|
792 |
getFieldAccessor(obj).setInt(obj, i);
|
jtulach@258
|
793 |
}
|
jtulach@258
|
794 |
|
jtulach@258
|
795 |
/**
|
jtulach@258
|
796 |
* Sets the value of a field as a {@code long} on the specified object.
|
jtulach@258
|
797 |
* This method is equivalent to
|
jtulach@258
|
798 |
* {@code set(obj, lObj)},
|
jtulach@258
|
799 |
* where {@code lObj} is a {@code Long} object and
|
jtulach@258
|
800 |
* {@code lObj.longValue() == l}.
|
jtulach@258
|
801 |
*
|
jtulach@258
|
802 |
* @param obj the object whose field should be modified
|
jtulach@258
|
803 |
* @param l the new value for the field of {@code obj}
|
jtulach@258
|
804 |
* being modified
|
jtulach@258
|
805 |
*
|
jtulach@258
|
806 |
* @exception IllegalAccessException if this {@code Field} object
|
jtulach@258
|
807 |
* is enforcing Java language access control and the underlying
|
jtulach@258
|
808 |
* field is either inaccessible or final.
|
jtulach@258
|
809 |
* @exception IllegalArgumentException if the specified object is not an
|
jtulach@258
|
810 |
* instance of the class or interface declaring the underlying
|
jtulach@258
|
811 |
* field (or a subclass or implementor thereof),
|
jtulach@258
|
812 |
* or if an unwrapping conversion fails.
|
jtulach@258
|
813 |
* @exception NullPointerException if the specified object is null
|
jtulach@258
|
814 |
* and the field is an instance field.
|
jtulach@258
|
815 |
* @exception ExceptionInInitializerError if the initialization provoked
|
jtulach@258
|
816 |
* by this method fails.
|
jtulach@258
|
817 |
* @see Field#set
|
jtulach@258
|
818 |
*/
|
jtulach@258
|
819 |
public void setLong(Object obj, long l)
|
jtulach@258
|
820 |
throws IllegalArgumentException, IllegalAccessException
|
jtulach@258
|
821 |
{
|
jtulach@258
|
822 |
getFieldAccessor(obj).setLong(obj, l);
|
jtulach@258
|
823 |
}
|
jtulach@258
|
824 |
|
jtulach@258
|
825 |
/**
|
jtulach@258
|
826 |
* Sets the value of a field as a {@code float} on the specified object.
|
jtulach@258
|
827 |
* This method is equivalent to
|
jtulach@258
|
828 |
* {@code set(obj, fObj)},
|
jtulach@258
|
829 |
* where {@code fObj} is a {@code Float} object and
|
jtulach@258
|
830 |
* {@code fObj.floatValue() == f}.
|
jtulach@258
|
831 |
*
|
jtulach@258
|
832 |
* @param obj the object whose field should be modified
|
jtulach@258
|
833 |
* @param f the new value for the field of {@code obj}
|
jtulach@258
|
834 |
* being modified
|
jtulach@258
|
835 |
*
|
jtulach@258
|
836 |
* @exception IllegalAccessException if this {@code Field} object
|
jtulach@258
|
837 |
* is enforcing Java language access control and the underlying
|
jtulach@258
|
838 |
* field is either inaccessible or final.
|
jtulach@258
|
839 |
* @exception IllegalArgumentException if the specified object is not an
|
jtulach@258
|
840 |
* instance of the class or interface declaring the underlying
|
jtulach@258
|
841 |
* field (or a subclass or implementor thereof),
|
jtulach@258
|
842 |
* or if an unwrapping conversion fails.
|
jtulach@258
|
843 |
* @exception NullPointerException if the specified object is null
|
jtulach@258
|
844 |
* and the field is an instance field.
|
jtulach@258
|
845 |
* @exception ExceptionInInitializerError if the initialization provoked
|
jtulach@258
|
846 |
* by this method fails.
|
jtulach@258
|
847 |
* @see Field#set
|
jtulach@258
|
848 |
*/
|
jtulach@258
|
849 |
public void setFloat(Object obj, float f)
|
jtulach@258
|
850 |
throws IllegalArgumentException, IllegalAccessException
|
jtulach@258
|
851 |
{
|
jtulach@258
|
852 |
getFieldAccessor(obj).setFloat(obj, f);
|
jtulach@258
|
853 |
}
|
jtulach@258
|
854 |
|
jtulach@258
|
855 |
/**
|
jtulach@258
|
856 |
* Sets the value of a field as a {@code double} on the specified object.
|
jtulach@258
|
857 |
* This method is equivalent to
|
jtulach@258
|
858 |
* {@code set(obj, dObj)},
|
jtulach@258
|
859 |
* where {@code dObj} is a {@code Double} object and
|
jtulach@258
|
860 |
* {@code dObj.doubleValue() == d}.
|
jtulach@258
|
861 |
*
|
jtulach@258
|
862 |
* @param obj the object whose field should be modified
|
jtulach@258
|
863 |
* @param d the new value for the field of {@code obj}
|
jtulach@258
|
864 |
* being modified
|
jtulach@258
|
865 |
*
|
jtulach@258
|
866 |
* @exception IllegalAccessException if this {@code Field} object
|
jtulach@258
|
867 |
* is enforcing Java language access control and the underlying
|
jtulach@258
|
868 |
* field is either inaccessible or final.
|
jtulach@258
|
869 |
* @exception IllegalArgumentException if the specified object is not an
|
jtulach@258
|
870 |
* instance of the class or interface declaring the underlying
|
jtulach@258
|
871 |
* field (or a subclass or implementor thereof),
|
jtulach@258
|
872 |
* or if an unwrapping conversion fails.
|
jtulach@258
|
873 |
* @exception NullPointerException if the specified object is null
|
jtulach@258
|
874 |
* and the field is an instance field.
|
jtulach@258
|
875 |
* @exception ExceptionInInitializerError if the initialization provoked
|
jtulach@258
|
876 |
* by this method fails.
|
jtulach@258
|
877 |
* @see Field#set
|
jtulach@258
|
878 |
*/
|
jtulach@258
|
879 |
public void setDouble(Object obj, double d)
|
jtulach@258
|
880 |
throws IllegalArgumentException, IllegalAccessException
|
jtulach@258
|
881 |
{
|
jtulach@258
|
882 |
getFieldAccessor(obj).setDouble(obj, d);
|
jtulach@258
|
883 |
}
|
jtulach@258
|
884 |
|
jtulach@258
|
885 |
// Convenience routine which performs security checks
|
jtulach@258
|
886 |
private FieldAccessor getFieldAccessor(Object obj)
|
jtulach@258
|
887 |
throws IllegalAccessException
|
jtulach@258
|
888 |
{
|
jaroslav@260
|
889 |
throw new SecurityException();
|
jtulach@258
|
890 |
}
|
jaroslav@260
|
891 |
|
jaroslav@260
|
892 |
private static abstract class FieldAccessor {
|
jaroslav@260
|
893 |
abstract void setShort(Object obj, short s);
|
jaroslav@260
|
894 |
abstract void setInt(Object obj, int i);
|
jaroslav@260
|
895 |
abstract void setChar(Object obj, char c);
|
jaroslav@260
|
896 |
abstract void setByte(Object obj, byte b);
|
jaroslav@260
|
897 |
abstract void setBoolean(Object obj, boolean z);
|
jaroslav@260
|
898 |
abstract void set(Object obj, Object value);
|
jaroslav@260
|
899 |
abstract double getDouble(Object obj);
|
jaroslav@260
|
900 |
abstract void setLong(Object obj, long l);
|
jaroslav@260
|
901 |
abstract void setFloat(Object obj, float f);
|
jaroslav@260
|
902 |
abstract void setDouble(Object obj, double d);
|
jaroslav@260
|
903 |
abstract long getLong(Object obj);
|
jaroslav@260
|
904 |
abstract int getInt(Object obj);
|
jaroslav@260
|
905 |
abstract short getShort(Object obj);
|
jaroslav@260
|
906 |
abstract char getChar(Object obj);
|
jaroslav@260
|
907 |
abstract byte getByte(Object obj);
|
jaroslav@260
|
908 |
abstract boolean getBoolean(Object obj);
|
jaroslav@260
|
909 |
abstract Object get(Object obj);
|
jaroslav@260
|
910 |
abstract float getFloat(Object obj);
|
jtulach@258
|
911 |
}
|
jtulach@258
|
912 |
|
jtulach@258
|
913 |
/*
|
jtulach@258
|
914 |
* Utility routine to paper over array type names
|
jtulach@258
|
915 |
*/
|
jtulach@258
|
916 |
static String getTypeName(Class<?> type) {
|
jtulach@258
|
917 |
if (type.isArray()) {
|
jtulach@258
|
918 |
try {
|
jtulach@258
|
919 |
Class<?> cl = type;
|
jtulach@258
|
920 |
int dimensions = 0;
|
jtulach@258
|
921 |
while (cl.isArray()) {
|
jtulach@258
|
922 |
dimensions++;
|
jtulach@258
|
923 |
cl = cl.getComponentType();
|
jtulach@258
|
924 |
}
|
jtulach@258
|
925 |
StringBuffer sb = new StringBuffer();
|
jtulach@258
|
926 |
sb.append(cl.getName());
|
jtulach@258
|
927 |
for (int i = 0; i < dimensions; i++) {
|
jtulach@258
|
928 |
sb.append("[]");
|
jtulach@258
|
929 |
}
|
jtulach@258
|
930 |
return sb.toString();
|
jtulach@258
|
931 |
} catch (Throwable e) { /*FALLTHRU*/ }
|
jtulach@258
|
932 |
}
|
jtulach@258
|
933 |
return type.getName();
|
jtulach@258
|
934 |
}
|
jtulach@258
|
935 |
|
jtulach@258
|
936 |
/**
|
jtulach@258
|
937 |
* @throws NullPointerException {@inheritDoc}
|
jtulach@258
|
938 |
* @since 1.5
|
jtulach@258
|
939 |
*/
|
jtulach@258
|
940 |
public <T extends Annotation> T getAnnotation(Class<T> annotationClass) {
|
jtulach@258
|
941 |
if (annotationClass == null)
|
jtulach@258
|
942 |
throw new NullPointerException();
|
jtulach@258
|
943 |
|
jaroslav@260
|
944 |
throw new UnsupportedOperationException();
|
jtulach@258
|
945 |
}
|
jtulach@258
|
946 |
|
jtulach@258
|
947 |
/**
|
jtulach@258
|
948 |
* @since 1.5
|
jtulach@258
|
949 |
*/
|
jtulach@258
|
950 |
public Annotation[] getDeclaredAnnotations() {
|
jaroslav@260
|
951 |
throw new UnsupportedOperationException();
|
jtulach@258
|
952 |
}
|
jtulach@258
|
953 |
}
|