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1 package com.thaiopensource.validate.auto;
2
3 import org.xml.sax.XMLReader  ;
4 import org.xml.sax.SAXException ;
5 import org.xml.sax.Locator ;
6 import org.xml.sax.Attributes ;
7 import org.xml.sax.ContentHandler ;
8 import org.xml.sax.SAXParseException ;
9 import org.xml.sax.helpers.DefaultHandler ;
10
11 import java.io.IOException ;
12 import java.util.Vector ;
13
14 import com.thaiopensource.validate.Schema;
15 import com.thaiopensource.validate.IncorrectSchemaException;
16 import com.thaiopensource.util.Localizer;
17 import com.thaiopensource.util.PropertyMap;
18
19 public class AutoSchemaReceiver implements SchemaReceiver {
20 private final PropertyMap properties;
21 private final Rewindable rewindable;
22
23 private class Handler extends DefaultHandler implements SchemaFuture {
24 private final XMLReader xr;
25 private SchemaFuture sf = null;
26 private Locator locator = null;
27 private final Vector prefixMappings = new Vector ();
28
29 private Handler(XMLReader xr) {
30 this.xr = xr;
31 }
32
33 public void setDocumentLocator(Locator locator) {
34 this.locator = locator;
35 }
36
37 public void startPrefixMapping(String prefix, String uri) {
38 prefixMappings.addElement(prefix);
39 prefixMappings.addElement(uri);
40 }
41
42 public void startElement(String uri, String localName,
43 String qName, Attributes attributes)
44 throws SAXException {
45 SchemaReceiverFactory srf = SchemaReceiverFactory.PROPERTY.get(properties);
46 SchemaReceiver sr = srf.createSchemaReceiver(uri, properties);
47 if (sr == null) {
48 Localizer localizer = new Localizer(AutoSchemaReceiver.class);
49 String detail = ("".equals(uri)
50 ? localizer.message("no_namespace")
51 : localizer.message("unknown_namespace", uri));
52 throw new SAXParseException (detail, locator);
53 }
54 sf = sr.installHandlers(xr);
55 rewindable.willNotRewind();
56 ContentHandler contentHandler = xr.getContentHandler();
57 if (contentHandler == null)
58 return;
59 if (locator != null) {
60 contentHandler.setDocumentLocator(locator);
61 contentHandler = xr.getContentHandler();
62 }
63 contentHandler.startDocument();
64 contentHandler = xr.getContentHandler();
65 for (int i = 0, len = prefixMappings.size(); i < len; i += 2) {
66 contentHandler.startPrefixMapping((String )prefixMappings.elementAt(i),
67 (String )prefixMappings.elementAt(i + 1));
68 contentHandler = xr.getContentHandler();
69 }
70 contentHandler.startElement(uri, localName, qName, attributes);
71 }
72
73 public Schema getSchema() throws IncorrectSchemaException, SAXException , IOException {
74 if (sf == null)
75 throw new IncorrectSchemaException();
76 return sf.getSchema();
77 }
78
79 public RuntimeException unwrapException(RuntimeException e) throws SAXException , IOException , IncorrectSchemaException {
80 if (sf == null)
81 return e;
82 return sf.unwrapException(e);
83 }
84 }
85
86 public AutoSchemaReceiver(PropertyMap properties, Rewindable rewindable) {
87 this.properties = properties;
88 this.rewindable = rewindable;
89 }
90
91 public SchemaFuture installHandlers(XMLReader xr) {
92 Handler h = new Handler (xr);
93 xr.setContentHandler(h);
94 return h;
95 }
96 }
97 |
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