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