01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * 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;
34:
35: import java.util.ArrayList;
36:
37: /**
38: * A document wrapper allowing caching of XSL-generated content.
39: */
40: public class CacheableDocument {
41: private ArrayList depends;
42: private Document document;
43:
44: CacheableDocument(Document document, ArrayList depends) {
45: this .document = document;
46: this .depends = depends;
47: }
48:
49: /**
50: * Returns the document
51: */
52: public Document getDocument() {
53: return document;
54: }
55:
56: /**
57: * True if the document is cacheable
58: */
59: public boolean isCacheable() {
60: return depends != null;
61: }
62:
63: /**
64: * Returns the modification time of the document sources.
65: */
66: public long getLastModified() {
67: if (depends == null)
68: return 0;
69:
70: long lastModified = 0;
71: for (int i = 0; i < depends.size(); i++) {
72: Path path = (Path) depends.get(i);
73:
74: long time = path.getLastModified();
75: if (time > lastModified)
76: lastModified = time;
77: }
78:
79: return lastModified;
80: }
81:
82: public ArrayList getCacheDepends() {
83: return depends;
84: }
85:
86: void addDepend(Path path) {
87: if (depends != null)
88: depends.add(path);
89: }
90: }
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