javassist.bytecode.ConstantAttribute Maven / Gradle / Ivy
/*
* 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.DataInputStream;
import java.util.Map;
import java.io.IOException;
/**
* ConstantValue_attribute.
*/
public class ConstantAttribute extends AttributeInfo {
/**
* The name of this attribute "ConstantValue".
*/
public static final String tag = "ConstantValue";
ConstantAttribute(ConstPool cp, int n, DataInputStream in)
throws IOException
{
super(cp, n, in);
}
/**
* Constructs a ConstantValue attribute.
*
* @param cp a constant pool table.
* @param index constantvalue_index
* of ConstantValue_attribute.
*/
public ConstantAttribute(ConstPool cp, int index) {
super(cp, tag);
byte[] bvalue = new byte[2];
bvalue[0] = (byte)(index >>> 8);
bvalue[1] = (byte)index;
set(bvalue);
}
/**
* Returns constantvalue_index.
*/
public int getConstantValue() {
return ByteArray.readU16bit(get(), 0);
}
/**
* Makes a copy. Class names are replaced according to the
* given Map object.
*
* @param newCp the constant pool table used by the new copy.
* @param classnames pairs of replaced and substituted
* class names.
*/
public AttributeInfo copy(ConstPool newCp, Map classnames) {
int index = getConstPool().copy(getConstantValue(), newCp,
classnames);
return new ConstantAttribute(newCp, index);
}
}