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Java > Open Source Codes > org > apache > ojb > otm > states > PersistentClean


1 package org.apache.ojb.otm.states;
2
3 /* Copyright 2003-2005 The Apache Software Foundation
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * 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
18 /**
19  * this state represents old Objects (i.e. already persistent but not changed during tx)
20  * --> no need to do anything for commit or rollback (ODMG StateOldClean).
21  */
22 public class PersistentClean extends State
23 {
24
25     PersistentClean()
26     {
27     }
28
29     /**
30      * return a String representation
31      */
32     public String JavaDoc toString()
33     {
34         return "Persistent-clean";
35     }
36
37     //-------------- State transitions --------------------
38
39     /**
40      * Describes the state transition when user modifies object
41      */
42     public State markDirty()
43             throws IllegalObjectStateException
44     {
45         return State.PERSISTENT_DIRTY;
46     }
47     
48     /**
49      * Describes the state transition on deletePersistent()
50      */
51     public State deletePersistent()
52             throws IllegalObjectStateException
53     {
54         return State.PERSISTENT_DELETED;
55     }
56     
57     /**
58      * Describes the state transition on commit()
59      */
60     public State commit()
61             throws IllegalObjectStateException
62     {
63         return State.HOLLOW;
64     }
65
66     /**
67      * Describes the state transition on rollback()
68      */
69     public State rollback()
70             throws IllegalObjectStateException
71     {
72         return State.HOLLOW;
73     }
74
75
76     //-------------- State semantics --------------------
77
78 }
79
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