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/*
* 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.io.IOException;
import java.util.Map;
/**
* <code>NestHost_attribute</code>.
* It was introduced by JEP-181. See JVMS 4.7.28 for the specification.
*
* @since 3.24
*/
public class NestHostAttribute extends AttributeInfo {
/**
* The name of this attribute <code>"NestHost"</code>.
*/
public static final String tag = "NestHost";
NestHostAttribute(ConstPool cp, int n, DataInputStream in) throws IOException {
super(cp, n, in);
}
private NestHostAttribute(ConstPool cp, int hostIndex) {
super(cp, tag, new byte[2]);
ByteArray.write16bit(hostIndex, get(), 0);
}
/**
* Makes a copy. Class names are replaced according to the
* given <code>Map</code> object.
*
* @param newCp the constant pool table used by the new copy.
* @param classnames pairs of replaced and substituted
* class names.
*/
@Override
public AttributeInfo copy(ConstPool newCp, Map<String, String> classnames) {
int hostIndex = ByteArray.readU16bit(get(), 0);
int newHostIndex = getConstPool().copy(hostIndex, newCp, classnames);
return new NestHostAttribute(newCp, newHostIndex);
}
/**
* Returns <code>host_class_index</code>. The constant pool entry
* at this entry is a <code>CONSTANT_Class_info</code> structure.
* @return the value of <code>host_class_index</code>.
*/
public int hostClassIndex() {
return ByteArray.readU16bit(info, 0);
}
}
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