1 /*
2  * Copyright (c) 2017, 2020, 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  * @LastModified: Jun 2019
30  */
31 public class ARRAYLENGTH extends Instruction
32     implements ExceptionThrower, StackProducer, StackConsumer /* since 6.0 */ {
33 
34     /** Get length of array
35      */
ARRAYLENGTH()36     public ARRAYLENGTH() {
37         super(com.sun.org.apache.bcel.internal.Const.ARRAYLENGTH, (short) 1);
38     }
39 
40 
41     /** @return exceptions this instruction may cause
42      */
43     @Override
getExceptions()44     public Class<?>[] getExceptions() {
45         return new Class<?>[] {
46             ExceptionConst.NULL_POINTER_EXCEPTION
47         };
48     }
49 
50 
51     /**
52      * Call corresponding visitor method(s). The order is:
53      * Call visitor methods of implemented interfaces first, then
54      * call methods according to the class hierarchy in descending order,
55      * i.e., the most specific visitXXX() call comes last.
56      *
57      * @param v Visitor object
58      */
59     @Override
accept( final Visitor v )60     public void accept( final Visitor v ) {
61         v.visitExceptionThrower(this);
62         v.visitStackProducer(this);
63         v.visitARRAYLENGTH(this);
64     }
65 }
66