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 int class_index; 028 private int method_index; 029 private final CPClass cpClass; 030 private final CPNameAndType method; 031 private static CPUTF8 attributeName; 032 033 public static void setAttributeName(final CPUTF8 cpUTF8Value) { 034 attributeName = cpUTF8Value; 035 } 036 037 public EnclosingMethodAttribute(final CPClass cpClass, final CPNameAndType method) { 038 super(attributeName); 039 this.cpClass = cpClass; 040 this.method = method; 041 } 042 043 @Override 044 protected ClassFileEntry[] getNestedClassFileEntries() { 045 if (method != null) { 046 return new ClassFileEntry[] {attributeName, cpClass, method}; 047 } 048 return new ClassFileEntry[] {attributeName, cpClass}; 049 } 050 051 /* 052 * (non-Javadoc) 053 * 054 * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#getLength() 055 */ 056 @Override 057 protected int getLength() { 058 return 4; 059 } 060 061 @Override 062 protected void resolve(final ClassConstantPool pool) { 063 super.resolve(pool); 064 cpClass.resolve(pool); 065 class_index = pool.indexOf(cpClass); 066 if (method != null) { 067 method.resolve(pool); 068 method_index = pool.indexOf(method); 069 } else { 070 method_index = 0; 071 } 072 } 073 074 /* 075 * (non-Javadoc) 076 * 077 * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#writeBody(java.io.DataOutputStream) 078 */ 079 @Override 080 protected void writeBody(final DataOutputStream dos) throws IOException { 081 dos.writeShort(class_index); 082 dos.writeShort(method_index); 083 } 084 085 /* 086 * (non-Javadoc) 087 * 088 * @see org.apache.commons.compress.harmony.unpack200.bytecode.ClassFileEntry#toString() 089 */ 090 @Override 091 public String toString() { 092 return "EnclosingMethod"; 093 } 094 095}