KickJava   Java API By Example, From Geeks To Geeks.

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


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 /**
20  * ACONST_NULL - Push null reference
21  * <PRE>Stack: ... -&gt; ..., null</PRE>
22  *
23  * @version $Id: ACONST_NULL.java 386056 2006-03-15 11:31:56Z tcurdt $
24  * @author <A HREF="mailto:m.dahm@gmx.de">M. Dahm</A>
25  */
26 public class ACONST_NULL extends Instruction implements PushInstruction, TypedInstruction {
27
28     /**
29      * Push null reference
30      */
31     public ACONST_NULL() {
32         super(org.apache.bcel.Constants.ACONST_NULL, (short) 1);
33     }
34
35
36     /** @return Type.NULL
37      */
38     public Type getType( ConstantPoolGen cp ) {
39         return Type.NULL;
40     }
41
42
43     /**
44      * Call corresponding visitor method(s). The order is:
45      * Call visitor methods of implemented interfaces first, then
46      * call methods according to the class hierarchy in descending order,
47      * i.e., the most specific visitXXX() call comes last.
48      *
49      * @param v Visitor object
50      */
51     public void accept( Visitor v ) {
52         v.visitStackProducer(this);
53         v.visitPushInstruction(this);
54         v.visitTypedInstruction(this);
55         v.visitACONST_NULL(this);
56     }
57 }
58
Popular Tags