1 /*
   2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
   3  */
   4 /*
   5  * Licensed to the Apache Software Foundation (ASF) under one or more
   6  * contributor license agreements.  See the NOTICE file distributed with
   7  * this work for additional information regarding copyright ownership.
   8  * The ASF licenses this file to You under the Apache License, Version 2.0
   9  * (the "License"); you may not use this file except in compliance with
  10  * the License.  You may obtain a copy of the License at
  11  *
  12  *      http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * Unless required by applicable law or agreed to in writing, software
  15  * distributed under the License is distributed on an "AS IS" BASIS,
  16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  * See the License for the specific language governing permissions and
  18  * limitations under the License.
  19  */
  20 
  21 package com.sun.org.apache.bcel.internal.generic;
  22 
  23 import com.sun.org.apache.bcel.internal.ExceptionConst;
  24 
  25 /**
  26  * ARRAYLENGTH -  Get length of array
  27  * <PRE>Stack: ..., arrayref -&gt; ..., length</PRE>
  28  *
  29  * @version $Id: ARRAYLENGTH.java 1747278 2016-06-07 17:28:43Z britter $
  30  * @LastModified: Oct 2017
  31  */
  32 public class ARRAYLENGTH extends Instruction
  33     implements ExceptionThrower, StackProducer, StackConsumer /* since 6.0 */ {
  34 
  35     /** Get length of array
  36      */
  37     public ARRAYLENGTH() {
  38         super(com.sun.org.apache.bcel.internal.Const.ARRAYLENGTH, (short) 1);
  39     }
  40 
  41 
  42     /** @return exceptions this instruction may cause
  43      */
  44     @Override
  45     public Class<?>[] getExceptions() {
  46         return new Class<?>[] {
  47             ExceptionConst.NULL_POINTER_EXCEPTION
  48         };
  49     }
  50 
  51 
  52     /**
  53      * Call corresponding visitor method(s). The order is:
  54      * Call visitor methods of implemented interfaces first, then
  55      * call methods according to the class hierarchy in descending order,
  56      * i.e., the most specific visitXXX() call comes last.
  57      *
  58      * @param v Visitor object
  59      */
  60     @Override
  61     public void accept( final Visitor v ) {
  62         v.visitExceptionThrower(this);
  63         v.visitStackProducer(this);
  64         v.visitARRAYLENGTH(this);
  65     }
  66 }