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


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 import org.apache.bcel.ExceptionConstants;
20
21 /**
22  * ANEWARRAY - Create new array of references
23  * <PRE>Stack: ..., count -&gt; ..., arrayref</PRE>
24  *
25  * @version $Id: ANEWARRAY.java 386056 2006-03-15 11:31:56Z tcurdt $
26  * @author <A HREF="mailto:m.dahm@gmx.de">M. Dahm</A>
27  */
28 public class ANEWARRAY extends CPInstruction implements LoadClass, AllocationInstruction,
29         ExceptionThrower, StackConsumer, StackProducer {
30
31     /**
32      * Empty constructor needed for the Class.newInstance() statement in
33      * Instruction.readInstruction(). Not to be used otherwise.
34      */
35     ANEWARRAY() {
36     }
37
38
39     public ANEWARRAY(int index) {
40         super(org.apache.bcel.Constants.ANEWARRAY, index);
41     }
42
43
44     public Class JavaDoc[] getExceptions() {
45         Class JavaDoc[] cs = new Class JavaDoc[1 + ExceptionConstants.EXCS_CLASS_AND_INTERFACE_RESOLUTION.length];
46         System.arraycopy(ExceptionConstants.EXCS_CLASS_AND_INTERFACE_RESOLUTION, 0, cs, 0,
47                 ExceptionConstants.EXCS_CLASS_AND_INTERFACE_RESOLUTION.length);
48         cs[ExceptionConstants.EXCS_CLASS_AND_INTERFACE_RESOLUTION.length] = ExceptionConstants.NEGATIVE_ARRAY_SIZE_EXCEPTION;
49         return cs;
50     }
51
52
53     /**
54      * Call corresponding visitor method(s). The order is:
55      * Call visitor methods of implemented interfaces first, then
56      * call methods according to the class hierarchy in descending order,
57      * i.e., the most specific visitXXX() call comes last.
58      *
59      * @param v Visitor object
60      */
61     public void accept( Visitor v ) {
62         v.visitLoadClass(this);
63         v.visitAllocationInstruction(this);
64         v.visitExceptionThrower(this);
65         v.visitStackProducer(this);
66         v.visitTypedInstruction(this);
67         v.visitCPInstruction(this);
68         v.visitANEWARRAY(this);
69     }
70
71
72     public ObjectType getLoadClassType( ConstantPoolGen cpg ) {
73         Type t = getType(cpg);
74         if (t instanceof ArrayType) {
75             t = ((ArrayType) t).getBasicType();
76         }
77         return (t instanceof ObjectType) ? (ObjectType) t : null;
78     }
79 }
80
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