001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     *  Unless required by applicable law or agreed to in writing, software
012     *  distributed under the License is distributed on an "AS IS" BASIS,
013     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     *  See the License for the specific language governing permissions and
015     *  limitations under the License. 
016     *
017     */
018    package org.apache.bcel.generic;
019    
020    /**
021     * Super class for the IFxxx family of instructions.
022     *
023     * @version $Id: IfInstruction.java 992350 2010-09-03 16:18:20Z markt $
024     * @author  <A HREF="mailto:m.dahm@gmx.de">M. Dahm</A>
025     */
026    public abstract class IfInstruction extends BranchInstruction implements StackConsumer {
027    
028        private static final long serialVersionUID = -781053966413893941L;
029    
030    
031        /**
032         * Empty constructor needed for the Class.newInstance() statement in
033         * Instruction.readInstruction(). Not to be used otherwise.
034         */
035        IfInstruction() {
036        }
037    
038    
039        /**
040         * @param opcode opcode of instruction
041         * @param target Target instruction to branch to
042         */
043        protected IfInstruction(short opcode, InstructionHandle target) {
044            super(opcode, target);
045        }
046    
047    
048        /**
049         * @return negation of instruction, e.g. IFEQ.negate() == IFNE
050         */
051        public abstract IfInstruction negate();
052    }