KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > xmldb > common > xml > queries > XPathQueryFactory


1 package org.xmldb.common.xml.queries;
2 /*
3  * The XML:DB Initiative Software License, Version 1.0
4  *
5  *
6  * Copyright (c) 2000-2003 The XML:DB Initiative. All rights
7  * reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
15  *
16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in
18  * the documentation and/or other materials provided with the
19  * distribution.
20  *
21  * 3. The end-user documentation included with the redistribution,
22  * if any, must include the following acknowledgment:
23  * "This product includes software developed by the
24  * XML:DB Initiative (http://www.xmldb.org/)."
25  * Alternately, this acknowledgment may appear in the software itself,
26  * if and wherever such third-party acknowledgments normally appear.
27  *
28  * 4. The name "XML:DB Initiative" must not be used to endorse or
29  * promote products derived from this software without prior written
30  * permission. For written permission, please contact info@xmldb.org.
31  *
32  * 5. Products derived from this software may not be called "XML:DB",
33  * nor may "XML:DB" appear in their name, without prior written
34  * permission of the XML:DB Initiative.
35  *
36  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
37  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
38  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
39  * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
40  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
42  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
43  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
44  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
45  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
46  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
47  * SUCH DAMAGE.
48  * ====================================================================
49  *
50  * This software consists of voluntary contributions made by many
51  * individuals on behalf of the XML:DB Initiative. For more information
52  * on the XML:DB Initiative, please see <http://www.xmldb.org/>.
53  */
54
55 import javax.xml.parsers.FactoryConfigurationError JavaDoc;
56
57
58 /**
59  * @version $Revision: 1.4 $ $Date: 2003/04/24 14:14:10 $
60  * @author <a HREF="http://www.softwarebuero.de">SMB</a>
61  * @see XPathQuery
62  */
63 public abstract class XPathQueryFactory {
64
65     public static final String JavaDoc FACTORY_KEY = "org.xmldb.common.xml.queries.XPathQueryFactory";
66
67     public XPathQueryFactory() {
68     }
69
70
71     public static XPathQueryFactory newInstance() {
72         //TODO: should we really default to xalan1, why not xalan2?
73 String JavaDoc factoryName = System.getProperty(FACTORY_KEY,
74                 "org.xmldb.common.xml.queries.xalan.XPathQueryFactoryImpl");
75
76         XPathQueryFactory factory = null;
77
78         try {
79             Class JavaDoc clazz = Class.forName(factoryName);
80             factory = (XPathQueryFactory) clazz.newInstance();
81         } catch (ClassNotFoundException JavaDoc cnfe) {
82             throw new FactoryConfigurationError JavaDoc(cnfe);
83         } catch (IllegalAccessException JavaDoc iae) {
84             throw new FactoryConfigurationError JavaDoc(iae);
85         } catch (InstantiationException JavaDoc ie) {
86             throw new FactoryConfigurationError JavaDoc(ie);
87         }
88         return factory;
89     }
90
91
92     public abstract XPathQuery newXPathQuery() throws XPathQueryConfigurationException;
93
94 }
95
Popular Tags