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