1 /*
2  * reserved comment block
3  * DO NOT REMOVE OR ALTER!
4  */
5 /*
6  * Licensed to the Apache Software Foundation (ASF) under one or more
7  * contributor license agreements.  See the NOTICE file distributed with
8  * this work for additional information regarding copyright ownership.
9  * The ASF licenses this file to You under the Apache License, Version 2.0
10  * (the "License"); you may not use this file except in compliance with
11  * the License.  You may obtain a copy of the License at
12  *
13  *      http://www.apache.org/licenses/LICENSE-2.0
14  *
15  * Unless required by applicable law or agreed to in writing, software
16  * distributed under the License is distributed on an "AS IS" BASIS,
17  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18  * See the License for the specific language governing permissions and
19  * limitations under the License.
20  */
21 
22 package com.sun.org.apache.bcel.internal.generic;
23 
24 import com.sun.org.apache.bcel.internal.ExceptionConst;
25 
26 /**
27  * Super class for instructions dealing with array access such as IALOAD.
28  *
29  */
30 public abstract class ArrayInstruction extends Instruction implements ExceptionThrower,
31         TypedInstruction {
32 
33     /**
34      * Empty constructor needed for Instruction.readInstruction.
35      * Not to be used otherwise.
36      */
ArrayInstruction()37     ArrayInstruction() {
38     }
39 
40 
41     /**
42      * @param opcode of instruction
43      */
ArrayInstruction(final short opcode)44     protected ArrayInstruction(final short opcode) {
45         super(opcode, (short) 1);
46     }
47 
48 
49     @Override
getExceptions()50     public Class<?>[] getExceptions() {
51         return ExceptionConst.createExceptions(ExceptionConst.EXCS.EXCS_ARRAY_EXCEPTION);
52     }
53 
54 
55     /** @return type associated with the instruction
56      */
57     @Override
getType( final ConstantPoolGen cp )58     public Type getType( final ConstantPoolGen cp ) {
59         final short _opcode = super.getOpcode();
60         switch (_opcode) {
61             case com.sun.org.apache.bcel.internal.Const.IALOAD:
62             case com.sun.org.apache.bcel.internal.Const.IASTORE:
63                 return Type.INT;
64             case com.sun.org.apache.bcel.internal.Const.CALOAD:
65             case com.sun.org.apache.bcel.internal.Const.CASTORE:
66                 return Type.CHAR;
67             case com.sun.org.apache.bcel.internal.Const.BALOAD:
68             case com.sun.org.apache.bcel.internal.Const.BASTORE:
69                 return Type.BYTE;
70             case com.sun.org.apache.bcel.internal.Const.SALOAD:
71             case com.sun.org.apache.bcel.internal.Const.SASTORE:
72                 return Type.SHORT;
73             case com.sun.org.apache.bcel.internal.Const.LALOAD:
74             case com.sun.org.apache.bcel.internal.Const.LASTORE:
75                 return Type.LONG;
76             case com.sun.org.apache.bcel.internal.Const.DALOAD:
77             case com.sun.org.apache.bcel.internal.Const.DASTORE:
78                 return Type.DOUBLE;
79             case com.sun.org.apache.bcel.internal.Const.FALOAD:
80             case com.sun.org.apache.bcel.internal.Const.FASTORE:
81                 return Type.FLOAT;
82             case com.sun.org.apache.bcel.internal.Const.AALOAD:
83             case com.sun.org.apache.bcel.internal.Const.AASTORE:
84                 return Type.OBJECT;
85             default:
86                 throw new ClassGenException("Oops: unknown case in switch" + _opcode);
87         }
88     }
89 }
90