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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   */
26  public abstract class FieldInstruction extends FieldOrMethod {
27  
28      /**
29       * Empty constructor needed for Instruction.readInstruction.
30       * Not to be used otherwise.
31       */
32      FieldInstruction() {
33      }
34  
35  
36      /**
37       * @param index to constant pool
38       */
39      protected FieldInstruction(final short opcode, final int index) {
40          super(opcode, index);
41      }
42  
43  
44      /**
45       * @return mnemonic for instruction with symbolic references resolved
46       */
47      @Override
48      public String toString( final ConstantPool cp ) {
49          return org.apache.bcel.Const.getOpcodeName(super.getOpcode()) + " "
50                  + cp.constantToString(super.getIndex(), org.apache.bcel.Const.CONSTANT_Fieldref);
51      }
52  
53  
54      /** @return size of field (1 or 2)
55       */
56      protected int getFieldSize( final ConstantPoolGen cpg ) {
57          return Type.size(Type.getTypeSize(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 type of field
70       */
71      public Type getFieldType( final ConstantPoolGen cpg ) {
72          return Type.getType(getSignature(cpg));
73      }
74  
75  
76      /** @return name of referenced field.
77       */
78      public String getFieldName( final ConstantPoolGen cpg ) {
79          return getName(cpg);
80      }
81  }