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 package org.apache.bcel.generic;
18
19 import org.apache.bcel.ExceptionConst;
20
21 /**
22 * ARRAYLENGTH - Get length of array
23 *
24 * <PRE>
25 * Stack: ..., arrayref -> ..., length
26 * </PRE>
27 */
28 public class ARRAYLENGTH extends Instruction implements ExceptionThrower, StackProducer, StackConsumer /* since 6.0 */ {
29
30 /**
31 * Gets length of array
32 */
33 public ARRAYLENGTH() {
34 super(org.apache.bcel.Const.ARRAYLENGTH, (short) 1);
35 }
36
37 /**
38 * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call
39 * methods according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last.
40 *
41 * @param v Visitor object
42 */
43 @Override
44 public void accept(final Visitor v) {
45 v.visitExceptionThrower(this);
46 v.visitStackProducer(this);
47 v.visitARRAYLENGTH(this);
48 }
49
50 /**
51 * @return exceptions this instruction may cause
52 */
53 @Override
54 public Class<?>[] getExceptions() {
55 return new Class[] {ExceptionConst.NULL_POINTER_EXCEPTION};
56 }
57 }