/*
* 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>NestMembers_attribute</code>.
* It was introduced by JEP-181. See JVMS 4.7.29 for the specification.
*
* @since 3.24
*/
public class
NestMembersAttribute extends
AttributeInfo {
/**
* The name of this attribute <code>"NestMembers"</code>.
*/
public static final
String tag = "NestMembers";
NestMembersAttribute(
ConstPool cp, int
n,
DataInputStream in) throws
IOException {
super(
cp,
n,
in);
}
private
NestMembersAttribute(
ConstPool cp, byte[]
info) {
super(
cp,
tag,
info);
}
/**
* 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) {
byte[]
src =
get();
byte[]
dest = new byte[
src.length];
ConstPool cp =
getConstPool();
int
n =
ByteArray.
readU16bit(
src, 0);
ByteArray.
write16bit(
n,
dest, 0);
for (int
i = 0,
j = 2;
i <
n; ++
i,
j += 2) {
int
index =
ByteArray.
readU16bit(
src,
j);
int
newIndex =
cp.
copy(
index,
newCp,
classnames);
ByteArray.
write16bit(
newIndex,
dest,
j);
}
return new
NestMembersAttribute(
newCp,
dest);
}
/**
* Returns <code>number_of_classes</code>.
* @return the number of the classes recorded in this attribute.
*/
public int
numberOfClasses() {
return
ByteArray.
readU16bit(
info, 0);
}
/** Returns <code>classes[index]</code>.
*
* @param index the index into <code>classes</code>.
* @return the value at the given index in the <code>classes</code> array.
* It is an index into the constant pool.
* The constant pool entry at the returned index is a
* <code>CONSTANT_Class_info</code> structure.
*/
public int
memberClass(int
index) {
return
ByteArray.
readU16bit(
info,
index * 2 + 2);
}
}