KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > com > caucho > xsl > CacheableDocument


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.xsl;
30
31 import com.caucho.vfs.Path;
32
33 import org.w3c.dom.Document JavaDoc;
34
35 import java.util.ArrayList JavaDoc;
36
37 /**
38  * A document wrapper allowing caching of XSL-generated content.
39  */
40 public class CacheableDocument {
41   private ArrayList JavaDoc depends;
42   private Document JavaDoc document;
43
44   CacheableDocument(Document JavaDoc document, ArrayList JavaDoc depends)
45   {
46     this.document = document;
47     this.depends = depends;
48   }
49
50   /**
51    * Returns the document
52    */
53   public Document JavaDoc getDocument()
54   {
55     return document;
56   }
57
58   /**
59    * True if the document is cacheable
60    */
61   public boolean isCacheable()
62   {
63     return depends != null;
64   }
65
66   /**
67    * Returns the modification time of the document sources.
68    */
69   public long getLastModified()
70   {
71     if (depends == null)
72       return 0;
73
74     long lastModified = 0;
75     for (int i = 0; i < depends.size(); i++) {
76       Path path = (Path) depends.get(i);
77
78       long time = path.getLastModified();
79       if (time > lastModified)
80     lastModified = time;
81     }
82
83     return lastModified;
84   }
85
86   public ArrayList JavaDoc getCacheDepends()
87   {
88     return depends;
89   }
90
91   void addDepend(Path path)
92   {
93     if (depends != null)
94       depends.add(path);
95   }
96 }
97
98
99
Popular Tags