Source code

    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}