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Java > Open Source Codes > com > sun > org > apache > xerces > internal > impl > xs > XSImplementationImpl


1 /*
2  * The Apache Software License, Version 1.1
3  *
4  *
5  * Copyright (c) 2003 The Apache Software Foundation. All rights
6  * reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  * notice, this list of conditions and the following disclaimer.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright
16  * notice, this list of conditions and the following disclaimer in
17  * the documentation and/or other materials provided with the
18  * distribution.
19  *
20  * 3. The end-user documentation included with the redistribution,
21  * if any, must include the following acknowledgment:
22  * "This product includes software developed by the
23  * Apache Software Foundation (http://www.apache.org/)."
24  * Alternately, this acknowledgment may appear in the software itself,
25  * if and wherever such third-party acknowledgments normally appear.
26  *
27  * 4. The names "Xerces" and "Apache Software Foundation" must
28  * not be used to endorse or promote products derived from this
29  * software without prior written permission. For written
30  * permission, please contact apache@apache.org.
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32  * 5. Products derived from this software may not be called "Apache",
33  * nor may "Apache" appear in their name, without prior written
34  * permission of the Apache Software Foundation.
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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,
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47  * SUCH DAMAGE.
48  * ====================================================================
49  *
50  * This software consists of voluntary contributions made by many
51  * individuals on behalf of the Apache Software Foundation and was
52  * originally based on software copyright (c) 2003, International
53  * Business Machines, Inc., http://www.apache.org. For more
54  * information on the Apache Software Foundation, please see
55  * <http://www.apache.org/>.
56  */
57
58 package com.sun.org.apache.xerces.internal.impl.xs;
59
60 import com.sun.org.apache.xerces.internal.dom.CoreDOMImplementationImpl;
61 import com.sun.org.apache.xerces.internal.dom.DOMMessageFormatter;
62 import com.sun.org.apache.xerces.internal.impl.xs.util.StringListImpl;
63 import com.sun.org.apache.xerces.internal.xs.StringList;
64 import com.sun.org.apache.xerces.internal.xs.XSException;
65 import com.sun.org.apache.xerces.internal.xs.XSImplementation;
66 import com.sun.org.apache.xerces.internal.xs.XSLoader;
67 import org.w3c.dom.DOMImplementation JavaDoc;
68
69
70 /**
71  * Implements XSImplementation interface that allows one to retrieve an instance of <code>XSLoader</code>.
72  * This interface should be implemented on the same object that implements
73  * DOMImplementation.
74  *
75  * @author Elena Litani, IBM
76  * @version $Id: XSImplementationImpl.java,v 1.3 2003/11/17 15:57:43 mrglavas Exp $
77  */
78 public class XSImplementationImpl extends CoreDOMImplementationImpl
79                                   implements XSImplementation {
80
81     //
82 // Data
83 //
84
85     // static
86
87     /** Dom implementation singleton. */
88     static XSImplementationImpl singleton = new XSImplementationImpl();
89
90     //
91 // Public methods
92 //
93
94     /** NON-DOM: Obtain and return the single shared object */
95     public static DOMImplementation JavaDoc getDOMImplementation() {
96         return singleton;
97     }
98
99     //
100 // DOMImplementation methods
101 //
102
103     /**
104      * Test if the DOM implementation supports a specific "feature" --
105      * currently meaning language and level thereof.
106      *
107      * @param feature The package name of the feature to test.
108      * In Level 1, supported values are "HTML" and "XML" (case-insensitive).
109      * At this writing, com.sun.org.apache.xerces.internal.dom supports only XML.
110      *
111      * @param version The version number of the feature being tested.
112      * This is interpreted as "Version of the DOM API supported for the
113      * specified Feature", and in Level 1 should be "1.0"
114      *
115      * @return true iff this implementation is compatable with the specified
116      * feature and version.
117      */
118     public boolean hasFeature(String JavaDoc feature, String JavaDoc version) {
119         
120         return (feature.equalsIgnoreCase("XS-Loader") && (version == null || version.equals("1.0")) ||
121         super.hasFeature(feature, version));
122     } // hasFeature(String,String):boolean
123
124
125
126     /* (non-Javadoc)
127      * @see com.sun.org.apache.xerces.internal.xs.XSImplementation#createXSLoader(com.sun.org.apache.xerces.internal.xs.StringList)
128      */
129     public XSLoader createXSLoader(StringList versions) throws XSException {
130         XSLoader loader = new XMLSchemaLoader();
131         if (versions == null){
132             return loader;
133         }
134         for (int i=0; i<versions.getLength();i++){
135             if (!versions.item(i).equals("1.0")){
136                 String JavaDoc msg =
137                     DOMMessageFormatter.formatMessage(
138                         DOMMessageFormatter.DOM_DOMAIN,
139                         "FEATURE_NOT_SUPPORTED",
140                         new Object JavaDoc[] { versions.item(i) });
141                 throw new XSException(XSException.NOT_SUPPORTED_ERR, msg);
142             }
143         }
144         return loader;
145     }
146
147     /* (non-Javadoc)
148      * @see com.sun.org.apache.xerces.internal.xs.XSImplementation#getRecognizedVersions()
149      */
150     public StringList getRecognizedVersions() {
151         StringListImpl list = new StringListImpl(new String JavaDoc[]{"1.0"}, 1);
152         return list;
153     }
154
155 } // class XSImplementationImpl
156
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