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 /***
58 * Super class for instructions dealing with array access such as IALOAD.
59 *
60 * @version $Id: ArrayInstruction.java,v 1.1.1.1 2001/10/29 20:00:06 jvanzyl Exp $
61 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
62 */
63 public abstract class ArrayInstruction extends Instruction
64 implements ExceptionThrower, TypedInstruction {
65 /***
66 * Empty constructor needed for the Class.newInstance() statement in
67 * Instruction.readInstruction(). Not to be used otherwise.
68 */
69 ArrayInstruction() {}
70
71 /***
72 * @param opcode of instruction
73 */
74 protected ArrayInstruction(short opcode) {
75 super(opcode, (short)1);
76 }
77
78 public Class[] getExceptions() {
79 return org.apache.bcel.ExceptionConstants.EXCS_ARRAY_EXCEPTION;
80 }
81
82 /*** @return type associated with the instruction
83 */
84 public Type getType(ConstantPoolGen cp) {
85 switch(opcode) {
86 case org.apache.bcel.Constants.IALOAD: case org.apache.bcel.Constants.IASTORE:
87 return Type.INT;
88 case org.apache.bcel.Constants.CALOAD: case org.apache.bcel.Constants.CASTORE:
89 return Type.CHAR;
90 case org.apache.bcel.Constants.BALOAD: case org.apache.bcel.Constants.BASTORE:
91 return Type.BYTE;
92 case org.apache.bcel.Constants.SALOAD: case org.apache.bcel.Constants.SASTORE:
93 return Type.SHORT;
94 case org.apache.bcel.Constants.LALOAD: case org.apache.bcel.Constants.LASTORE:
95 return Type.LONG;
96 case org.apache.bcel.Constants.DALOAD: case org.apache.bcel.Constants.DASTORE:
97 return Type.DOUBLE;
98 case org.apache.bcel.Constants.FALOAD: case org.apache.bcel.Constants.FASTORE:
99 return Type.FLOAT;
100 case org.apache.bcel.Constants.AALOAD: case org.apache.bcel.Constants.AASTORE:
101 return Type.OBJECT;
102
103 default: throw new ClassGenException("Oops: unknown case in switch" + opcode);
104 }
105 }
106 }
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