1 /*
2 * reserved comment block
3 * DO NOT REMOVE OR ALTER!
4 */
5 package com.sun.org.apache.bcel.internal.generic;
6
7 /* ====================================================================
8 * The Apache Software License, Version 1.1
9 *
10 * Copyright (c) 2001 The Apache Software Foundation. All rights
11 * reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 *
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 *
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in
22 * the documentation and/or other materials provided with the
23 * distribution.
24 *
25 * 3. The end-user documentation included with the redistribution,
26 * if any, must include the following acknowledgment:
27 * "This product includes software developed by the
28 * Apache Software Foundation (http://www.apache.org/)."
29 * Alternately, this acknowledgment may appear in the software itself,
30 * if and wherever such third-party acknowledgments normally appear.
31 *
32 * 4. The names "Apache" and "Apache Software Foundation" and
33 * "Apache BCEL" must not be used to endorse or promote products
34 * derived from this software without prior written permission. For
35 * written permission, please contact apache@apache.org.
36 *
37 * 5. Products derived from this software may not be called "Apache",
38 * "Apache BCEL", nor may "Apache" appear in their name, without
39 * prior written permission of the Apache Software Foundation.
40 *
41 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
42 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
43 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
44 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
45 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
46 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
47 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
48 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
49 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
50 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
51 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * SUCH DAMAGE.
53 * ====================================================================
54 *
55 * This software consists of voluntary contributions made by many
56 * individuals on behalf of the Apache Software Foundation. For more
57 * information on the Apache Software Foundation, please see
58 * <http://www.apache.org/>.
59 */
60
61 /**
62 * Super class for instructions dealing with array access such as IALOAD.
63 *
64 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
65 */
66 public abstract class ArrayInstruction extends Instruction
67 implements ExceptionThrower, TypedInstruction {
68 /**
69 * Empty constructor needed for the Class.newInstance() statement in
70 * Instruction.readInstruction(). Not to be used otherwise.
71 */
72 ArrayInstruction() {}
73
74 /**
75 * @param opcode of instruction
76 */
77 protected ArrayInstruction(short opcode) {
78 super(opcode, (short)1);
79 }
80
81 public Class[] getExceptions() {
82 return com.sun.org.apache.bcel.internal.ExceptionConstants.EXCS_ARRAY_EXCEPTION;
83 }
84
85 /** @return type associated with the instruction
86 */
87 public Type getType(ConstantPoolGen cp) {
88 switch(opcode) {
89 case com.sun.org.apache.bcel.internal.Constants.IALOAD: case com.sun.org.apache.bcel.internal.Constants.IASTORE:
90 return Type.INT;
91 case com.sun.org.apache.bcel.internal.Constants.CALOAD: case com.sun.org.apache.bcel.internal.Constants.CASTORE:
92 return Type.CHAR;
93 case com.sun.org.apache.bcel.internal.Constants.BALOAD: case com.sun.org.apache.bcel.internal.Constants.BASTORE:
94 return Type.BYTE;
95 case com.sun.org.apache.bcel.internal.Constants.SALOAD: case com.sun.org.apache.bcel.internal.Constants.SASTORE:
96 return Type.SHORT;
97 case com.sun.org.apache.bcel.internal.Constants.LALOAD: case com.sun.org.apache.bcel.internal.Constants.LASTORE:
98 return Type.LONG;
99 case com.sun.org.apache.bcel.internal.Constants.DALOAD: case com.sun.org.apache.bcel.internal.Constants.DASTORE:
100 return Type.DOUBLE;
101 case com.sun.org.apache.bcel.internal.Constants.FALOAD: case com.sun.org.apache.bcel.internal.Constants.FASTORE:
102 return Type.FLOAT;
103 case com.sun.org.apache.bcel.internal.Constants.AALOAD: case com.sun.org.apache.bcel.internal.Constants.AASTORE:
104 return Type.OBJECT;
105
106 default: throw new ClassGenException("Oops: unknown case in switch" + opcode);
107 }
108 }
109 }