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 */
017package org.apache.bcel.generic;
018
019/**
020 * ACONST_NULL - Push null reference
021 *
022 * <PRE>
023 * Stack: ... -&gt; ..., null
024 * </PRE>
025 */
026public class ACONST_NULL extends Instruction implements PushInstruction, TypedInstruction {
027
028    /**
029     * Push null reference
030     */
031    public ACONST_NULL() {
032        super(org.apache.bcel.Const.ACONST_NULL, (short) 1);
033    }
034
035    /**
036     * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call
037     * methods according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last.
038     *
039     * @param v Visitor object
040     */
041    @Override
042    public void accept(final Visitor v) {
043        v.visitStackProducer(this);
044        v.visitPushInstruction(this);
045        v.visitTypedInstruction(this);
046        v.visitACONST_NULL(this);
047    }
048
049    /**
050     * @return Type.NULL
051     */
052    @Override
053    public Type getType(final ConstantPoolGen cp) {
054        return Type.NULL;
055    }
056}