01: /*
02: * Copyright 2000-2004 The Apache Software Foundation
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
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: * @param opcode instruction opcode
36: */
37: protected StackInstruction(short opcode) {
38: super (opcode, (short) 1);
39: }
40:
41: /** @return Type.UNKNOWN
42: */
43: public Type getType(ConstantPoolGen cp) {
44: return Type.UNKNOWN;
45: }
46: }
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