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Java > Open Source Codes > org > apache > bcel > generic > ARRAYLENGTH


1 /*
2  * Copyright 2000-2004 The Apache Software Foundation
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *
16  */
17 package org.apache.bcel.generic;
18
19 /**
20  * ARRAYLENGTH - Get length of array
21  * <PRE>Stack: ..., arrayref -&gt; ..., length</PRE>
22  *
23  * @version $Id: ARRAYLENGTH.java 386056 2006-03-15 11:31:56Z tcurdt $
24  * @author <A HREF="mailto:m.dahm@gmx.de">M. Dahm</A>
25  */
26 public class ARRAYLENGTH extends Instruction implements ExceptionThrower, StackProducer {
27
28     /** Get length of array
29      */
30     public ARRAYLENGTH() {
31         super(org.apache.bcel.Constants.ARRAYLENGTH, (short) 1);
32     }
33
34
35     /** @return exceptions this instruction may cause
36      */
37     public Class JavaDoc[] getExceptions() {
38         return new Class JavaDoc[] {
39             org.apache.bcel.ExceptionConstants.NULL_POINTER_EXCEPTION
40         };
41     }
42
43
44     /**
45      * Call corresponding visitor method(s). The order is:
46      * Call visitor methods of implemented interfaces first, then
47      * call methods according to the class hierarchy in descending order,
48      * i.e., the most specific visitXXX() call comes last.
49      *
50      * @param v Visitor object
51      */
52     public void accept( Visitor v ) {
53         v.visitExceptionThrower(this);
54         v.visitStackProducer(this);
55         v.visitARRAYLENGTH(this);
56     }
57 }
58
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