01: package org.mandarax.jdbc.server;
02:
03: /*
04: * Copyright (C) 1999-2004 <a href="mailto:mandarax@jbdietrich.com">Jens Dietrich</a>
05: *
06: * This library 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 library 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:
21: import org.mandarax.xkb.*;
22: import org.mandarax.xkb.framework.*;
23: import org.mandarax.kernel.*;
24:
25: /**
26: * A knowledge base factory based on XKB files or URLs.
27: * @author <A HREF="mailto:mandarax@jbdietrich.com">Jens Dietrich</A>
28: * @version 3.3.2 <29 December 2004>
29: * @since 3.0
30: */
31:
32: public class XKBKnowledgeBaseFactory extends
33: AbstractKnowledgeBaseFactory {
34: protected static XKBDriver driver = new XKBDriver_2_1();
35:
36: /**
37: * Get a knowledge base.
38: * @return a knowledge base
39: * @param param the parameter string
40: * @throws an exception
41: */
42: public KnowledgeBase getKnowledgeBase(String param)
43: throws Exception {
44: XKBManager mgr = new XKBManager();
45: java.io.InputStream in = getInputStream(param);
46: mgr.setDriver(driver);
47: try {
48: return mgr.importKnowledgeBase(in);
49: } catch (XKBException x) {
50: LOG_JDBC.error(
51: "Cannot load knowledge base with XKB driver from "
52: + param, x);
53: throw new CannotLoadKnowledgeBaseException(
54: "Cannot load knowledge base with xkb driver from "
55: + param + " , see log for details", x);
56: }
57: }
58:
59: /**
60: * Indicates whether this factory is suitable to access knowledge bases
61: * using the given protocol.
62: * @param protocol a protocol (name) such as zkb, xkb, ruleml etc
63: * @return a boolean
64: */
65: public boolean supportsProtocol(String protocolName) {
66: return protocolName != null && protocolName.equals(XKB);
67: }
68:
69: }
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