KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > apache > excalibur > source > impl > validity > ExpiresValidity


1 /*
2  * Copyright 2002-2004 The Apache Software Foundation
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
12  * implied.
13  *
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 package org.apache.excalibur.source.impl.validity;
18
19 import org.apache.excalibur.source.SourceValidity;
20
21 /**
22  * A validation object that holds an expiration date.
23  * When the defined time/date has arrived, this validity object is
24  * not valid any more.
25  *
26  * @author <a HREF="mailto:dev@avalon.apache.org">Avalon Development Team</a>
27  * @version CVS $Revision: 1.4 $ $Date: 2004/02/28 11:47:17 $
28  */
29 public final class ExpiresValidity
30     implements SourceValidity
31 {
32     private long expires;
33
34     /**
35      * Constructor
36      * @param expires The delta from now when this validity object gets invalid.
37      */
38     public ExpiresValidity( long expires )
39     {
40         this.expires = System.currentTimeMillis() + expires;
41     }
42
43     /**
44      * Checks if the expires date is already reached.
45      *
46      * @see org.apache.excalibur.source.SourceValidity#isValid()
47      */
48     public int isValid()
49     {
50         final long currentTime = System.currentTimeMillis();
51         return (currentTime <= this.expires ? SourceValidity.VALID : SourceValidity.INVALID);
52     }
53
54     /**
55      * This method is never invoked as {@link #isValid} can always perform
56      * the complete check.
57      *
58      * @see org.apache.excalibur.source.SourceValidity#isValid(SourceValidity)
59      */
60     public int isValid( SourceValidity newValidity )
61     {
62         return SourceValidity.INVALID;
63     }
64
65     /**
66      *
67      * @see java.lang.Object#toString()
68      */
69     public String JavaDoc toString()
70     {
71         return "ExpiresValidity: " + expires;
72     }
73 }
74
Popular Tags