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 org.apache.bcel.classfile.ConstantPool;
20
21 /**
22 * Super class for the GET/PUTxxx family of instructions.
23 */
24 public abstract class FieldInstruction extends FieldOrMethod {
25
26 /**
27 * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise.
28 */
29 FieldInstruction() {
30 }
31
32 /**
33 * @param index to constant pool
34 */
35 protected FieldInstruction(final short opcode, final int index) {
36 super(opcode, index);
37 }
38
39 /**
40 * @return name of referenced field.
41 */
42 public String getFieldName(final ConstantPoolGen cpg) {
43 return getName(cpg);
44 }
45
46 /**
47 * @return size of field (1 or 2)
48 */
49 protected int getFieldSize(final ConstantPoolGen cpg) {
50 return Type.size(Type.getTypeSize(getSignature(cpg)));
51 }
52
53 /**
54 * @return type of field
55 */
56 public Type getFieldType(final ConstantPoolGen cpg) {
57 return Type.getType(getSignature(cpg));
58 }
59
60 /**
61 * @return return type of referenced field
62 */
63 @Override
64 public Type getType(final ConstantPoolGen cpg) {
65 return getFieldType(cpg);
66 }
67
68 /**
69 * @return mnemonic for instruction with symbolic references resolved
70 */
71 @Override
72 public String toString(final ConstantPool cp) {
73 return org.apache.bcel.Const.getOpcodeName(super.getOpcode()) + " " + cp.constantToString(super.getIndex(), org.apache.bcel.Const.CONSTANT_Fieldref);
74 }
75 }