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.jdbc.JDBCUtils;
22: import org.mandarax.kernel.*;
23:
24: /**
25: * A knowledge base factory implementation that tries to create another factory
26: * from the param, interpreting it as class name.
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 KnowledgeBaseFactoryProxy extends
33: AbstractKnowledgeBaseFactory {
34:
35: /**
36: * Get a knowledge base.
37: * @return a knowledge base
38: * @param source the parameter string of the form className[:param]
39: * @throws an exception
40: */
41: public KnowledgeBase getKnowledgeBase(String source)
42: throws Exception {
43: String refClassName = null;
44: int pos = source.indexOf(JDBCUtils.URL_SEPARATOR);
45: refClassName = (pos > -1) ? source.substring(0, pos) : source;
46: String param = (pos > -1) ? source.substring(pos + 1) : null;
47: KnowledgeBaseFactory delegate = (KnowledgeBaseFactory) Class
48: .forName(refClassName).newInstance();
49: return delegate.getKnowledgeBase(param);
50: }
51:
52: /**
53: * Indicates whether this factory is suitable to access knowledge bases
54: * using the given protocol.
55: * @param protocol a protocol (name) such as zkb, xkb, ruleml etc
56: * @return a boolean
57: */
58: public boolean supportsProtocol(String protocolName) {
59: return protocolName != null && protocolName.equals(REF);
60: }
61:
62: }
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