1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 */ 18 package org.apache.bcel.classfile; 19 20 import java.io.DataInput; 21 import java.io.DataOutputStream; 22 import java.io.IOException; 23 24 import org.apache.bcel.Const; 25 26 /** 27 * This class is derived from <em>Attribute</em> and represents a reference 28 * to a PMG attribute. 29 * 30 * @version $Id$ 31 * @see Attribute 32 */ 33 public final class PMGClass extends Attribute { 34 35 private int pmg_class_index; 36 private int pmg_index; 37 38 39 /** 40 * Initialize from another object. Note that both objects use the same 41 * references (shallow copy). Use copy() for a physical copy. 42 */ 43 public PMGClass(final PMGClass c) { 44 this(c.getNameIndex(), c.getLength(), c.getPMGIndex(), c.getPMGClassIndex(), c 45 .getConstantPool()); 46 } 47 48 49 /** 50 * Construct object from input stream. 51 * @param name_index Index in constant pool to CONSTANT_Utf8 52 * @param length Content length in bytes 53 * @param input Input stream 54 * @param constant_pool Array of constants 55 * @throws IOException 56 */ 57 PMGClass(final int name_index, final int length, final DataInput input, final ConstantPool constant_pool) 58 throws IOException { 59 this(name_index, length, input.readUnsignedShort(), input.readUnsignedShort(), constant_pool); 60 } 61 62 63 /** 64 * @param name_index Index in constant pool to CONSTANT_Utf8 65 * @param length Content length in bytes 66 * @param pmg_index index in constant pool for source file name 67 * @param pmg_class_index Index in constant pool to CONSTANT_Utf8 68 * @param constant_pool Array of constants 69 */ 70 public PMGClass(final int name_index, final int length, final int pmg_index, final int pmg_class_index, 71 final ConstantPool constant_pool) { 72 super(Const.ATTR_PMG, name_index, length, constant_pool); 73 this.pmg_index = pmg_index; 74 this.pmg_class_index = pmg_class_index; 75 } 76 77 78 /** 79 * Called by objects that are traversing the nodes of the tree implicitely 80 * defined by the contents of a Java class. I.e., the hierarchy of methods, 81 * fields, attributes, etc. spawns a tree of objects. 82 * 83 * @param v Visitor object 84 */ 85 @Override 86 public void accept( final Visitor v ) { 87 System.err.println("Visiting non-standard PMGClass object"); 88 } 89 90 91 /** 92 * Dump source file attribute to file stream in binary format. 93 * 94 * @param file Output file stream 95 * @throws IOException 96 */ 97 @Override 98 public final void dump( final DataOutputStream file ) throws IOException { 99 super.dump(file); 100 file.writeShort(pmg_index); 101 file.writeShort(pmg_class_index); 102 } 103 104 105 /** 106 * @return Index in constant pool of source file name. 107 */ 108 public final int getPMGClassIndex() { 109 return pmg_class_index; 110 } 111 112 113 /** 114 * @param pmg_class_index 115 */ 116 public final void setPMGClassIndex( final int pmg_class_index ) { 117 this.pmg_class_index = pmg_class_index; 118 } 119 120 121 /** 122 * @return Index in constant pool of source file name. 123 */ 124 public final int getPMGIndex() { 125 return pmg_index; 126 } 127 128 129 /** 130 * @param pmg_index 131 */ 132 public final void setPMGIndex( final int pmg_index ) { 133 this.pmg_index = pmg_index; 134 } 135 136 137 /** 138 * @return PMG name. 139 */ 140 public final String getPMGName() { 141 final ConstantUtf8 c = (ConstantUtf8) super.getConstantPool().getConstant(pmg_index, 142 Const.CONSTANT_Utf8); 143 return c.getBytes(); 144 } 145 146 147 /** 148 * @return PMG class name. 149 */ 150 public final String getPMGClassName() { 151 final ConstantUtf8 c = (ConstantUtf8) super.getConstantPool().getConstant(pmg_class_index, 152 Const.CONSTANT_Utf8); 153 return c.getBytes(); 154 } 155 156 157 /** 158 * @return String representation 159 */ 160 @Override 161 public final String toString() { 162 return "PMGClass(" + getPMGName() + ", " + getPMGClassName() + ")"; 163 } 164 165 166 /** 167 * @return deep copy of this attribute 168 */ 169 @Override 170 public Attribute copy( final ConstantPool _constant_pool ) { 171 return (Attribute) clone(); 172 } 173 } 174
