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 */
018package org.apache.bcel.generic;
019
020import org.apache.bcel.ExceptionConst;
021
022/**
023 * ARRAYLENGTH -  Get length of array
024 * <PRE>Stack: ..., arrayref -&gt; ..., length</PRE>
025 *
026 */
027public class ARRAYLENGTH extends Instruction implements ExceptionThrower, StackProducer, StackConsumer /* since 6.0 */ {
028
029    /** Get length of array
030     */
031    public ARRAYLENGTH() {
032        super(org.apache.bcel.Const.ARRAYLENGTH, (short) 1);
033    }
034
035
036    /** @return exceptions this instruction may cause
037     */
038    @Override
039    public Class<?>[] getExceptions() {
040        return new Class[] {
041            ExceptionConst.NULL_POINTER_EXCEPTION
042        };
043    }
044
045
046    /**
047     * Call corresponding visitor method(s). The order is:
048     * Call visitor methods of implemented interfaces first, then
049     * call methods according to the class hierarchy in descending order,
050     * i.e., the most specific visitXXX() call comes last.
051     *
052     * @param v Visitor object
053     */
054    @Override
055    public void accept( final Visitor v ) {
056        v.visitExceptionThrower(this);
057        v.visitStackProducer(this);
058        v.visitARRAYLENGTH(this);
059    }
060}