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.generic;
19 
20 import org.apache.bcel.classfile.ConstantPool;
21 
22 /**
23  * Super class for the GET/PUTxxx family of instructions.
24  *
25  * @version $Id$
26  */
27 public abstract class FieldInstruction extends FieldOrMethod {
28 
29     /**
30      * Empty constructor needed for Instruction.readInstruction.
31      * Not to be used otherwise.
32      */
FieldInstruction()33     FieldInstruction() {
34     }
35 
36 
37     /**
38      * @param index to constant pool
39      */
FieldInstruction(final short opcode, final int index)40     protected FieldInstruction(final short opcode, final int index) {
41         super(opcode, index);
42     }
43 
44 
45     /**
46      * @return mnemonic for instruction with symbolic references resolved
47      */
48     @Override
toString( final ConstantPool cp )49     public String toString( final ConstantPool cp ) {
50         return org.apache.bcel.Const.getOpcodeName(super.getOpcode()) + " "
51                 + cp.constantToString(super.getIndex(), org.apache.bcel.Const.CONSTANT_Fieldref);
52     }
53 
54 
55     /** @return size of field (1 or 2)
56      */
getFieldSize( final ConstantPoolGen cpg )57     protected int getFieldSize( final ConstantPoolGen cpg ) {
58         return Type.size(Type.getTypeSize(getSignature(cpg)));
59     }
60 
61 
62     /** @return return type of referenced field
63      */
64     @Override
getType( final ConstantPoolGen cpg )65     public Type getType( final ConstantPoolGen cpg ) {
66         return getFieldType(cpg);
67     }
68 
69 
70     /** @return type of field
71      */
getFieldType( final ConstantPoolGen cpg )72     public Type getFieldType( final ConstantPoolGen cpg ) {
73         return Type.getType(getSignature(cpg));
74     }
75 
76 
77     /** @return name of referenced field.
78      */
getFieldName( final ConstantPoolGen cpg )79     public String getFieldName( final ConstantPoolGen cpg ) {
80         return getName(cpg);
81     }
82 }
83