001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.commons.compress.harmony.unpack200.bytecode; 018 019import java.io.DataOutputStream; 020import java.io.IOException; 021 022/** 023 * Enclosing method class file attribute. 024 */ 025public class EnclosingMethodAttribute extends Attribute { 026 027 private static CPUTF8 attributeName; 028 public static void setAttributeName(final CPUTF8 cpUTF8Value) { 029 attributeName = cpUTF8Value; 030 } 031 private int classIndex; 032 private int methodIndex; 033 private final CPClass cpClass; 034 035 private final CPNameAndType method; 036 037 public EnclosingMethodAttribute(final CPClass cpClass, final CPNameAndType method) { 038 super(attributeName); 039 this.cpClass = cpClass; 040 this.method = method; 041 } 042 043 /* 044 * (non-Javadoc) 045 * 046 * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#getLength() 047 */ 048 @Override 049 protected int getLength() { 050 return 4; 051 } 052 053 @Override 054 protected ClassFileEntry[] getNestedClassFileEntries() { 055 if (method != null) { 056 return new ClassFileEntry[] { attributeName, cpClass, method }; 057 } 058 return new ClassFileEntry[] { attributeName, cpClass }; 059 } 060 061 @Override 062 protected void resolve(final ClassConstantPool pool) { 063 super.resolve(pool); 064 cpClass.resolve(pool); 065 classIndex = pool.indexOf(cpClass); 066 if (method != null) { 067 method.resolve(pool); 068 methodIndex = pool.indexOf(method); 069 } else { 070 methodIndex = 0; 071 } 072 } 073 074 /* 075 * (non-Javadoc) 076 * 077 * @see org.apache.commons.compress.harmony.unpack200.bytecode.ClassFileEntry#toString() 078 */ 079 @Override 080 public String toString() { 081 return "EnclosingMethod"; 082 } 083 084 /* 085 * (non-Javadoc) 086 * 087 * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#writeBody(java.io.DataOutputStream) 088 */ 089 @Override 090 protected void writeBody(final DataOutputStream dos) throws IOException { 091 dos.writeShort(classIndex); 092 dos.writeShort(methodIndex); 093 } 094 095}