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Java > Open Source Codes > org > apache > bcel > verifier > structurals > UninitializedObjectType


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.verifier.structurals;
18
19
20 import org.apache.bcel.Constants;
21 import org.apache.bcel.generic.ObjectType;
22 import org.apache.bcel.generic.ReferenceType;
23
24 /**
25  * This class represents an uninitialized object type; see The Java
26  * Virtual Machine Specification, Second Edition, page 147: 4.9.4 for
27  * more details.
28  *
29  * @version $Id: UninitializedObjectType.java 386056 2006-03-15 11:31:56Z tcurdt $
30  * @author Enver Haase
31  */
32 public class UninitializedObjectType extends ReferenceType implements Constants{
33
34     /** The "initialized" version. */
35     private ObjectType initialized;
36     
37     /** Creates a new instance. */
38     public UninitializedObjectType(ObjectType t){
39         super(T_UNKNOWN, "<UNINITIALIZED OBJECT OF TYPE '"+t.getClassName()+"'>");
40         initialized = t;
41     }
42
43     /**
44      * Returns the ObjectType of the same class as the one of the uninitialized object
45      * represented by this UninitializedObjectType instance.
46      */
47     public ObjectType getInitialized(){
48         return initialized;
49     }
50
51     /** @return a hash code value for the object.
52      */
53     public int hashCode() { return initialized.hashCode(); }
54
55     /**
56      * Returns true on equality of this and o.
57      * Equality means the ObjectType instances of "initialized"
58      * equal one another in this and the o instance.
59      *
60      */
61     public boolean equals(Object JavaDoc o){
62         if (! (o instanceof UninitializedObjectType)) {
63             return false;
64         }
65         return initialized.equals(((UninitializedObjectType)o).initialized);
66     }
67 }
68
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