01: /*
02: * argun 1.0
03: * Web 2.0 delivery framework
04: * Copyright (C) 2007 Hammurapi Group
05: *
06: * This program is free software; you can redistribute it and/or
07: * modify it under the terms of the GNU Lesser General Public
08: * License as published by the Free Software Foundation; either
09: * version 2 of the License, or (at your option) any later version.
10: *
11: * This program is distributed in the hope that it will be useful,
12: * but WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * Lesser General Public License for more details.
15: *
16: * You should have received a copy of the GNU Lesser General Public
17: * License along with this library; if not, write to the Free Software
18: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19: *
20: * URL: http://www.hammurapi.biz
21: * e-Mail: support@hammurapi.biz
22: */
23: package biz.hammurapi.web.eval;
24:
25: import java.io.ByteArrayInputStream;
26: import java.io.IOException;
27: import java.io.InputStream;
28:
29: import org.onemind.jxp.CachedJxpPage;
30: import org.onemind.jxp.CachingPageSource;
31:
32: import biz.hammurapi.config.Context;
33:
34: /**
35: * Represents a JxpPageSource using context.
36: *
37: * @author TiongHiang Lee (thlee@onemindsoft.org)
38: *
39: */
40: public class ContextPageSource extends CachingPageSource {
41:
42: private Context context;
43:
44: public ContextPageSource(Context context) {
45: this .context = context;
46: }
47:
48: protected boolean isExpired(CachedJxpPage page) {
49: return false;
50: }
51:
52: protected boolean hasStream(String pageName) {
53: return context.get(pageName) != null;
54: }
55:
56: /**
57: * {@inheritDoc}
58: */
59: protected InputStream loadStream(CachedJxpPage page)
60: throws IOException {
61: String str = (String) context.get(page.getName());
62: page.setPageTimepstamp(System.currentTimeMillis());
63: return new ByteArrayInputStream(str.getBytes());
64: }
65: }
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