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