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 * 017 */ 018package org.apache.bcel.generic; 019 020import java.io.DataOutputStream; 021import java.io.IOException; 022 023import org.apache.bcel.classfile.ConstantUtf8; 024import org.apache.bcel.classfile.ElementValue; 025import org.apache.bcel.classfile.EnumElementValue; 026 027/** 028 * @since 6.0 029 */ 030public class EnumElementValueGen extends ElementValueGen 031{ 032 // For enum types, these two indices point to the type and value 033 private int typeIdx; 034 035 private int valueIdx; 036 037 /** 038 * This ctor assumes the constant pool already contains the right type and 039 * value - as indicated by typeIdx and valueIdx. This ctor is used for 040 * deserialization 041 */ 042 protected EnumElementValueGen(final int typeIdx, final int valueIdx, 043 final ConstantPoolGen cpool) 044 { 045 super(ElementValueGen.ENUM_CONSTANT, cpool); 046 if (super.getElementValueType() != ENUM_CONSTANT) { 047 throw new RuntimeException( 048 "Only element values of type enum can be built with this ctor - type specified: " + super.getElementValueType()); 049 } 050 this.typeIdx = typeIdx; 051 this.valueIdx = valueIdx; 052 } 053 054 /** 055 * Return immutable variant of this EnumElementValue 056 */ 057 @Override 058 public ElementValue getElementValue() 059 { 060 System.err.println("Duplicating value: " + getEnumTypeString() + ":" 061 + getEnumValueString()); 062 return new EnumElementValue(super.getElementValueType(), typeIdx, valueIdx, 063 getConstantPool().getConstantPool()); 064 } 065 066 public EnumElementValueGen(final ObjectType t, final String value, final ConstantPoolGen cpool) 067 { 068 super(ElementValueGen.ENUM_CONSTANT, cpool); 069 typeIdx = cpool.addUtf8(t.getSignature());// was addClass(t); 070 valueIdx = cpool.addUtf8(value);// was addString(value); 071 } 072 073 public EnumElementValueGen(final EnumElementValue value, final ConstantPoolGen cpool, 074 final boolean copyPoolEntries) 075 { 076 super(ENUM_CONSTANT, cpool); 077 if (copyPoolEntries) 078 { 079 typeIdx = cpool.addUtf8(value.getEnumTypeString());// was 080 // addClass(value.getEnumTypeString()); 081 valueIdx = cpool.addUtf8(value.getEnumValueString()); // was 082 // addString(value.getEnumValueString()); 083 } 084 else 085 { 086 typeIdx = value.getTypeIndex(); 087 valueIdx = value.getValueIndex(); 088 } 089 } 090 091 @Override 092 public void dump(final DataOutputStream dos) throws IOException 093 { 094 dos.writeByte(super.getElementValueType()); // u1 type of value (ENUM_CONSTANT == 'e') 095 dos.writeShort(typeIdx); // u2 096 dos.writeShort(valueIdx); // u2 097 } 098 099 @Override 100 public String stringifyValue() 101 { 102 final ConstantUtf8 cu8 = (ConstantUtf8) getConstantPool().getConstant(valueIdx); 103 return cu8.getBytes(); 104 // ConstantString cu8 = 105 // (ConstantString)getConstantPool().getConstant(valueIdx); 106 // return 107 // ((ConstantUtf8)getConstantPool().getConstant(cu8.getStringIndex())).getBytes(); 108 } 109 110 // BCELBUG: Should we need to call utility.signatureToString() on the output 111 // here? 112 public String getEnumTypeString() 113 { 114 // Constant cc = getConstantPool().getConstant(typeIdx); 115 // ConstantClass cu8 = 116 // (ConstantClass)getConstantPool().getConstant(typeIdx); 117 // return 118 // ((ConstantUtf8)getConstantPool().getConstant(cu8.getNameIndex())).getBytes(); 119 return ((ConstantUtf8) getConstantPool().getConstant(typeIdx)) 120 .getBytes(); 121 // return Utility.signatureToString(cu8.getBytes()); 122 } 123 124 public String getEnumValueString() 125 { 126 return ((ConstantUtf8) getConstantPool().getConstant(valueIdx)).getBytes(); 127 // ConstantString cu8 = 128 // (ConstantString)getConstantPool().getConstant(valueIdx); 129 // return 130 // ((ConstantUtf8)getConstantPool().getConstant(cu8.getStringIndex())).getBytes(); 131 } 132 133 public int getValueIndex() 134 { 135 return valueIdx; 136 } 137 138 public int getTypeIndex() 139 { 140 return typeIdx; 141 } 142}