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