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.Constants;
58 import org.apache.bcel.ExceptionConstants;
59
60 /***
61 * PUTFIELD - Put field in object
62 * <PRE>Stack: ..., objectref, value -> ...</PRE>
63 * OR
64 * <PRE>Stack: ..., objectref, value.word1, value.word2 -> ...</PRE>
65 *
66 * @version $Id: PUTFIELD.java,v 1.3 2001/12/18 14:52:28 jvanzyl Exp $
67 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
68 */
69 public class PUTFIELD
70 extends FieldInstruction
71 implements PopInstruction,ExceptionThrower{
72 /***
73 * Empty constructor needed for the Class.newInstance() statement in
74 * Instruction.readInstruction(). Not to be used otherwise.
75 */
76 PUTFIELD() {}
77
78 public PUTFIELD(int index) {
79 super(Constants.PUTFIELD, index);
80 }
81
82 public int consumeStack(ConstantPoolGen cpg) { return getFieldSize(cpg) + 1; }
83
84 public Class[] getExceptions() {
85 Class[] cs = new Class[2 + ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length];
86
87 System.arraycopy(ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION, 0,
88 cs, 0, ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length);
89
90 cs[ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length+1] =
91 ExceptionConstants.INCOMPATIBLE_CLASS_CHANGE_ERROR;
92 cs[ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length] =
93 ExceptionConstants.NULL_POINTER_EXCEPTION;
94
95 return cs;
96 }
97
98
99 /***
100 * Call corresponding visitor method(s). The order is:
101 * Call visitor methods of implemented interfaces first, then
102 * call methods according to the class hierarchy in descending order,
103 * i.e., the most specific visitXXX() call comes last.
104 *
105 * @param v Visitor object
106 */
107 public void accept(Visitor v) {
108 v.visitExceptionThrower(this);
109 v.visitStackConsumer(this);
110 v.visitPopInstruction(this);
111 v.visitTypedInstruction(this);
112 v.visitLoadClass(this);
113 v.visitCPInstruction(this);
114 v.visitFieldOrMethod(this);
115 v.visitFieldInstruction(this);
116 v.visitPUTFIELD(this);
117 }
118 }
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