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 -> ..., length</PRE> 025 * 026 * @version $Id: ARRAYLENGTH.java 1747278 2016-06-07 17:28:43Z britter $ 027 */ 028public class ARRAYLENGTH extends Instruction implements ExceptionThrower, StackProducer, StackConsumer /* since 6.0 */ { 029 030 /** Get length of array 031 */ 032 public ARRAYLENGTH() { 033 super(org.apache.bcel.Const.ARRAYLENGTH, (short) 1); 034 } 035 036 037 /** @return exceptions this instruction may cause 038 */ 039 @Override 040 public Class<?>[] getExceptions() { 041 return new Class[] { 042 ExceptionConst.NULL_POINTER_EXCEPTION 043 }; 044 } 045 046 047 /** 048 * Call corresponding visitor method(s). The order is: 049 * Call visitor methods of implemented interfaces first, then 050 * call methods according to the class hierarchy in descending order, 051 * i.e., the most specific visitXXX() call comes last. 052 * 053 * @param v Visitor object 054 */ 055 @Override 056 public void accept( final Visitor v ) { 057 v.visitExceptionThrower(this); 058 v.visitStackProducer(this); 059 v.visitARRAYLENGTH(this); 060 } 061}