View Javadoc
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: FieldInstruction.html 1021978 2017-12-09 17:38:21Z ggregory $
26   */
27  public abstract class FieldInstruction extends FieldOrMethod {
28  
29      /**
30       * Empty constructor needed for Instruction.readInstruction.
31       * Not to be used otherwise.
32       */
33      FieldInstruction() {
34      }
35  
36  
37      /**
38       * @param index to constant pool
39       */
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
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       */
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
65      public Type getType( final ConstantPoolGen cpg ) {
66          return getFieldType(cpg);
67      }
68  
69  
70      /** @return type of field
71       */
72      public Type getFieldType( final ConstantPoolGen cpg ) {
73          return Type.getType(getSignature(cpg));
74      }
75  
76  
77      /** @return name of referenced field.
78       */
79      public String getFieldName( final ConstantPoolGen cpg ) {
80          return getName(cpg);
81      }
82  }