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


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.Constants;
20 import org.apache.bcel.ExceptionConstants;
21
22 /**
23  * INVOKEVIRTUAL - Invoke instance method; dispatch based on class
24  *
25  * <PRE>Stack: ..., objectref, [arg1, [arg2 ...]] -&gt; ...</PRE>
26  *
27  * @version $Id: INVOKEVIRTUAL.java 386056 2006-03-15 11:31:56Z tcurdt $
28  * @author <A HREF="mailto:m.dahm@gmx.de">M. Dahm</A>
29  */
30 public class INVOKEVIRTUAL extends InvokeInstruction {
31
32     /**
33      * Empty constructor needed for the Class.newInstance() statement in
34      * Instruction.readInstruction(). Not to be used otherwise.
35      */
36     INVOKEVIRTUAL() {
37     }
38
39
40     public INVOKEVIRTUAL(int index) {
41         super(Constants.INVOKEVIRTUAL, index);
42     }
43
44
45     public Class JavaDoc[] getExceptions() {
46         Class JavaDoc[] cs = new Class JavaDoc[4 + ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length];
47         System.arraycopy(ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION, 0, cs, 0,
48                 ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length);
49         cs[ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length + 3] = ExceptionConstants.UNSATISFIED_LINK_ERROR;
50         cs[ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length + 2] = ExceptionConstants.ABSTRACT_METHOD_ERROR;
51         cs[ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length + 1] = ExceptionConstants.INCOMPATIBLE_CLASS_CHANGE_ERROR;
52         cs[ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length] = ExceptionConstants.NULL_POINTER_EXCEPTION;
53         return cs;
54     }
55
56
57     /**
58      * Call corresponding visitor method(s). The order is:
59      * Call visitor methods of implemented interfaces first, then
60      * call methods according to the class hierarchy in descending order,
61      * i.e., the most specific visitXXX() call comes last.
62      *
63      * @param v Visitor object
64      */
65     public void accept( Visitor v ) {
66         v.visitExceptionThrower(this);
67         v.visitTypedInstruction(this);
68         v.visitStackConsumer(this);
69         v.visitStackProducer(this);
70         v.visitLoadClass(this);
71         v.visitCPInstruction(this);
72         v.visitFieldOrMethod(this);
73         v.visitInvokeInstruction(this);
74         v.visitINVOKEVIRTUAL(this);
75     }
76 }
77
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