/*
* Javassist, a Java-bytecode translator toolkit.
* Copyright (C) 1999- Shigeru Chiba. All Rights Reserved.
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. Alternatively, the contents of this file may be used under
* the terms of the GNU Lesser General Public License Version 2.1 or later,
* or the Apache License Version 2.0.
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*/
package javassist.bytecode;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.util.Map;
import javassist.CtClass;
import javassist.bytecode.annotation.AnnotationsWriter;
import javassist.bytecode.annotation.MemberValue;
/**
* A class representing AnnotationDefault_attribute
.
*
*
For example, if you declare the following annotation type: * *
* @interface Author { * String name() default "Shakespeare"; * int age() default 99; * } ** *
The defautl values of name
and age
* are stored as annotation default attributes in Author.class
.
* The following code snippet obtains the default value of name
:
*
*
* ClassPool pool = ... * CtClass cc = pool.get("Author"); * CtMethod cm = cc.getDeclaredMethod("age"); * MethodInfo minfo = cm.getMethodInfo(); * AnnotationDefaultAttribute ada * = (AnnotationDefaultAttribute) * minfo.getAttribute(AnnotationDefaultAttribute.tag); * MemberValue value = ada.getDefaultValue()); // default value of age ** *
If the following statement is executed after the code above, * the default value of age is set to 80: * *
* ada.setDefaultValue(new IntegerMemberValue(minfo.getConstPool(), 80)); ** * @see AnnotationsAttribute * @see javassist.bytecode.annotation.MemberValue */ public class AnnotationDefaultAttribute extends AttributeInfo { /** * The name of the
AnnotationDefault
attribute.
*/
public static final String tag = "AnnotationDefault";
/**
* Constructs an AnnotationDefault_attribute
.
*
* @param cp constant pool
* @param info the contents of this attribute. It does not
* include attribute_name_index
or
* attribute_length
.
*/
public AnnotationDefaultAttribute(ConstPool cp, byte[] info) {
super(cp, tag, info);
}
/**
* Constructs an empty AnnotationDefault_attribute
.
* The default value can be set by setDefaultValue()
.
*
* @param cp constant pool
* @see #setDefaultValue(javassist.bytecode.annotation.MemberValue)
*/
public AnnotationDefaultAttribute(ConstPool cp) {
this(cp, new byte[] { 0, 0 });
}
/**
* @param n the attribute name.
*/
AnnotationDefaultAttribute(ConstPool cp, int n, DataInputStream in)
throws IOException
{
super(cp, n, in);
}
/**
* Copies this attribute and returns a new copy.
*/
@Override
public AttributeInfo copy(ConstPool newCp, Map