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Java > Open Source Codes > org > xquark > util > NSPrefixFilter


1 /*
2  * This file belongs to the XQuark distribution.
3  * Copyright (C) 2003 Universite de Versailles Saint-Quentin.
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with this program; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307.
18  * You can also get it at http://www.gnu.org/licenses/lgpl.html
19  *
20  * For more information on this software, see http://www.xquark.org.
21  */
22
23 package org.xquark.util;
24
25 import org.xml.sax.*;
26 import org.xml.sax.helpers.AttributesImpl JavaDoc;
27
28 /**
29  * An XMLFilter implementation used to perform qualified SAX names (rawnames)
30  * reconstruction from prefix mapping events, intended repository only support
31  * the default values. It also performs xmlns attributes reconstruction.
32  * IMPORTANT: SAX2 XMLReader
33  * <code>http://xml.org/sax/features/namespaces</code> feature is
34  * supposed to be set to true which is the default.
35  */
36 public class NSPrefixFilter extends DecoratorFilter implements SAXConstants
37 {
38     private static final String JavaDoc RCSRevision = "$Revision: 1.2 $";
39     private static final String JavaDoc RCSName = "$Name: $";
40     
41     private boolean prefixFeature = false;
42     private AttributesImpl JavaDoc attributes = null;
43     
44     public final static String JavaDoc NS_PREFIX = "xmlns";
45     public final static String JavaDoc XML_PREFIX = "xml";
46     
47     public NSPrefixFilter()
48     {
49         super(new NSPrefixDecorator());
50     }
51     
52     public NSPrefixFilter(XMLReader reader)
53     {
54         super(reader, new NSPrefixDecorator());
55     }
56     
57     public boolean getFeature(String JavaDoc name)
58     throws SAXNotRecognizedException, SAXNotSupportedException
59     {
60         if (name.equals(SAX_PREFIX_FEATURE))
61             return ((NSPrefixDecorator)decorator).isEnabled();
62             // Note : try not to set this feature for repository cannot be set other to false
63 else if (getParent() != null)
64             return getParent().getFeature(name);
65         else
66             return false;
67     }
68     
69     public void setFeature(String JavaDoc name,boolean value)
70     throws SAXNotRecognizedException, SAXNotSupportedException
71     {
72         if (name.equals(SAX_PREFIX_FEATURE))
73             ((NSPrefixDecorator)decorator).setEnabled(value);
74         else if (getParent() != null)
75             getParent().setFeature(name, value);
76     }
77 }
78
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