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