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Java > Open Source Codes > org > apache > bcel > generic > StackInstruction


1 /*
2  * Copyright 2000-2004 The Apache Software Foundation
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *
16  */
17 package org.apache.bcel.generic;
18
19 /**
20  * Super class for stack operations like DUP and POP.
21  *
22  * @version $Id: StackInstruction.java 386056 2006-03-15 11:31:56Z tcurdt $
23  * @author <A HREF="mailto:m.dahm@gmx.de">M. Dahm</A>
24  */
25 public abstract class StackInstruction extends Instruction {
26
27     /**
28      * Empty constructor needed for the Class.newInstance() statement in
29      * Instruction.readInstruction(). Not to be used otherwise.
30      */
31     StackInstruction() {
32     }
33
34
35     /**
36      * @param opcode instruction opcode
37      */
38     protected StackInstruction(short opcode) {
39         super(opcode, (short) 1);
40     }
41
42
43     /** @return Type.UNKNOWN
44      */
45     public Type getType( ConstantPoolGen cp ) {
46         return Type.UNKNOWN;
47     }
48 }
49
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