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 package org.apache.bcel.generic;
18
19 import java.io.DataOutputStream;
20 import java.io.IOException;
21
22 import org.apache.bcel.classfile.ConstantUtf8;
23 import org.apache.bcel.classfile.ElementValue;
24 import org.apache.bcel.classfile.EnumElementValue;
25
26 /**
27 * @since 6.0
28 */
29 public class EnumElementValueGen extends ElementValueGen {
30 // For enum types, these two indices point to the type and value
31 private final int typeIdx;
32
33 private final int valueIdx;
34
35 public EnumElementValueGen(final EnumElementValue value, final ConstantPoolGen cpool, final boolean copyPoolEntries) {
36 super(ENUM_CONSTANT, cpool);
37 if (copyPoolEntries) {
38 typeIdx = cpool.addUtf8(value.getEnumTypeString()); // was addClass(value.getEnumTypeString());
39 valueIdx = cpool.addUtf8(value.getEnumValueString()); // was addString(value.getEnumValueString());
40 } else {
41 typeIdx = value.getTypeIndex();
42 valueIdx = value.getValueIndex();
43 }
44 }
45
46 /**
47 * This ctor assumes the constant pool already contains the right type and value - as indicated by typeIdx and valueIdx.
48 * This ctor is used for deserialization
49 */
50 protected EnumElementValueGen(final int typeIdx, final int valueIdx, final ConstantPoolGen cpool) {
51 super(ENUM_CONSTANT, cpool);
52 if (super.getElementValueType() != ENUM_CONSTANT) {
53 throw new IllegalArgumentException("Only element values of type enum can be built with this ctor - type specified: " + super.getElementValueType());
54 }
55 this.typeIdx = typeIdx;
56 this.valueIdx = valueIdx;
57 }
58
59 public EnumElementValueGen(final ObjectType t, final String value, final ConstantPoolGen cpool) {
60 super(ENUM_CONSTANT, cpool);
61 typeIdx = cpool.addUtf8(t.getSignature()); // was addClass(t);
62 valueIdx = cpool.addUtf8(value); // was addString(value);
63 }
64
65 @Override
66 public void dump(final DataOutputStream dos) throws IOException {
67 dos.writeByte(super.getElementValueType()); // u1 type of value (ENUM_CONSTANT == 'e')
68 dos.writeShort(typeIdx); // u2
69 dos.writeShort(valueIdx); // u2
70 }
71
72 /**
73 * Return immutable variant of this EnumElementValue
74 */
75 @Override
76 public ElementValue getElementValue() {
77 System.err.println("Duplicating value: " + getEnumTypeString() + ":" + getEnumValueString());
78 return new EnumElementValue(super.getElementValueType(), typeIdx, valueIdx, getConstantPool().getConstantPool());
79 }
80
81 // BCELBUG: Should we need to call utility.signatureToString() on the output
82 // here?
83 public String getEnumTypeString() {
84 // Constant cc = getConstantPool().getConstant(typeIdx);
85 // ConstantClass cu8 =
86 // (ConstantClass) getConstantPool().getConstant(typeIdx);
87 // return
88 // ((ConstantUtf8) getConstantPool().getConstant(cu8.getNameIndex())).getBytes();
89 return ((ConstantUtf8) getConstantPool().getConstant(typeIdx)).getBytes();
90 // return Utility.signatureToString(cu8.getBytes());
91 }
92
93 public String getEnumValueString() {
94 return ((ConstantUtf8) getConstantPool().getConstant(valueIdx)).getBytes();
95 // ConstantString cu8 =
96 // (ConstantString) getConstantPool().getConstant(valueIdx);
97 // return
98 // ((ConstantUtf8) getConstantPool().getConstant(cu8.getStringIndex())).getBytes();
99 }
100
101 public int getTypeIndex() {
102 return typeIdx;
103 }
104
105 public int getValueIndex() {
106 return valueIdx;
107 }
108
109 @Override
110 public String stringifyValue() {
111 final ConstantUtf8 cu8 = (ConstantUtf8) getConstantPool().getConstant(valueIdx);
112 return cu8.getBytes();
113 // ConstantString cu8 =
114 // (ConstantString) getConstantPool().getConstant(valueIdx);
115 // return
116 // ((ConstantUtf8) getConstantPool().getConstant(cu8.getStringIndex())).getBytes();
117 }
118 }