1
2
3
4
5
6 package org.xml.sax.ext;
7
8 import java.io.IOException;
9 import org.xml.sax.InputSource;
10 import org.xml.sax.SAXException;
11 import org.xml.sax.helpers.DefaultHandler;
12
13
14 /***
15 * This class extends the SAX2 base handler class to support the
16 * SAX2 {@link LexicalHandler}, {@link DeclHandler}, and
17 * {@link EntityResolver2} extensions. Except for overriding the
18 * original SAX1 {@link DefaultHandler#resolveEntity resolveEntity()}
19 * method the added handler methods just return. Subclassers may
20 * override everything on a method-by-method basis.
21 *
22 * <blockquote>
23 * <em>This module, both source code and documentation, is in the
24 * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
25 * </blockquote>
26 *
27 * <p> <em>Note:</em> this class might yet learn that the
28 * <em>ContentHandler.setDocumentLocator()</em> call might be passed a
29 * {@link Locator2} object, and that the
30 * <em>ContentHandler.startElement()</em> call might be passed a
31 * {@link Attributes2} object.
32 *
33 * @since SAX 2.0 (extensions 1.1 alpha)
34 * @author David Brownell
35 * @version TBS
36 */
37 public class DefaultHandler2 extends DefaultHandler
38 implements LexicalHandler, DeclHandler, EntityResolver2
39 {
40 /*** Constructs a handler which ignores all parsing events. */
41 public DefaultHandler2 () { }
42
43
44
45
46 public void startCDATA ()
47 throws SAXException
48 {}
49
50 public void endCDATA ()
51 throws SAXException
52 {}
53
54 public void startDTD (String name, String publicId, String systemId)
55 throws SAXException
56 {}
57
58 public void endDTD ()
59 throws SAXException
60 {}
61
62 public void startEntity (String name)
63 throws SAXException
64 {}
65
66 public void endEntity (String name)
67 throws SAXException
68 {}
69
70 public void comment (char ch [], int start, int length)
71 throws SAXException
72 { }
73
74
75
76
77 public void attributeDecl (String eName, String aName,
78 String type, String mode, String value)
79 throws SAXException
80 {}
81
82 public void elementDecl (String name, String model)
83 throws SAXException
84 {}
85
86 public void externalEntityDecl (String name,
87 String publicId, String systemId)
88 throws SAXException
89 {}
90
91 public void internalEntityDecl (String name, String value)
92 throws SAXException
93 {}
94
95
96
97 /***
98 * Tells the parser that if no external subset has been declared
99 * in the document text, none should be used.
100 */
101 public InputSource getExternalSubset (String name, String baseURI)
102 throws SAXException, IOException
103 { return null; }
104
105 /***
106 * Tells the parser to resolve the systemId against the baseURI
107 * and read the entity text from that resulting absolute URI.
108 * Note that because the older
109 * {@link DefaultHandler#resolveEntity DefaultHandler.resolveEntity()},
110 * method is overridden to call this one, this method may sometimes
111 * be invoked with null <em>name</em> and <em>baseURI</em>, and
112 * with the <em>systemId</em> already absolutized.
113 */
114 public InputSource resolveEntity (String name, String publicId,
115 String baseURI, String systemId)
116 throws SAXException, IOException
117 { return null; }
118
119
120
121 /***
122 * Invokes
123 * {@link EntityResolver2#resolveEntity EntityResolver2.resolveEntity()}
124 * with null entity name and base URI.
125 * You only need to override that method to use this class.
126 */
127 public InputSource resolveEntity (String publicId, String systemId)
128 throws SAXException, IOException
129 { return resolveEntity (null, publicId, null, systemId); }
130 }