1 package org.apache.bcel.generic;
2
3 /* ====================================================================
4 * The Apache Software License, Version 1.1
5 *
6 * Copyright (c) 2001 The Apache Software Foundation. All rights
7 * reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. The end-user documentation included with the redistribution,
22 * if any, must include the following acknowledgment:
23 * "This product includes software developed by the
24 * Apache Software Foundation (http://www.apache.org/)."
25 * Alternately, this acknowledgment may appear in the software itself,
26 * if and wherever such third-party acknowledgments normally appear.
27 *
28 * 4. The names "Apache" and "Apache Software Foundation" and
29 * "Apache BCEL" must not be used to endorse or promote products
30 * derived from this software without prior written permission. For
31 * written permission, please contact apache@apache.org.
32 *
33 * 5. Products derived from this software may not be called "Apache",
34 * "Apache BCEL", nor may "Apache" appear in their name, without
35 * prior written permission of the Apache Software Foundation.
36 *
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 * SUCH DAMAGE.
49 * ====================================================================
50 *
51 * This software consists of voluntary contributions made by many
52 * individuals on behalf of the Apache Software Foundation. For more
53 * information on the Apache Software Foundation, please see
54 * <http://www.apache.org/>.
55 */
56
57 import org.apache.bcel.classfile.ConstantPool;
58 import org.apache.bcel.classfile.ConstantUtf8;
59 import org.apache.bcel.classfile.ConstantNameAndType;
60 import org.apache.bcel.classfile.ConstantCP;
61 import org.apache.bcel.classfile.*;
62
63 /***
64 * Super class for the GET/PUTxxx family of instructions.
65 *
66 * @version $Id: FieldInstruction.java,v 1.1.1.1 2001/10/29 20:00:12 jvanzyl Exp $
67 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
68 */
69 public abstract class FieldInstruction extends FieldOrMethod
70 implements TypedInstruction {
71 /***
72 * Empty constructor needed for the Class.newInstance() statement in
73 * Instruction.readInstruction(). Not to be used otherwise.
74 */
75 FieldInstruction() {}
76
77 /***
78 * @param index to constant pool
79 */
80 protected FieldInstruction(short opcode, int index) {
81 super(opcode, index);
82 }
83
84 /***
85 * @return mnemonic for instruction with symbolic references resolved
86 */
87 public String toString(ConstantPool cp) {
88 return org.apache.bcel.Constants.OPCODE_NAMES[opcode] + " " +
89 cp.constantToString(index, org.apache.bcel.Constants.CONSTANT_Fieldref);
90 }
91
92 /*** @return size of field (1 or 2)
93 */
94 protected int getFieldSize(ConstantPoolGen cpg) {
95 return getType(cpg).getSize();
96 }
97
98 /*** @return return type of referenced field
99 */
100 public Type getType(ConstantPoolGen cpg) {
101 return getFieldType(cpg);
102 }
103
104 /*** @return type of field
105 */
106 public Type getFieldType(ConstantPoolGen cpg) {
107 return Type.getType(getSignature(cpg));
108 }
109
110 /*** @return name of referenced field.
111 */
112 public String getFieldName(ConstantPoolGen cpg) {
113 return getName(cpg);
114 }
115 }
116
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