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1 package com.thaiopensource.relaxng.impl;
2
3 import org.relaxng.datatype.DatatypeLibrary;
4 import org.relaxng.datatype.DatatypeLibraryFactory;
5
6 import java.util.Hashtable  ;
7
8 import com.thaiopensource.xml.util.WellKnownNamespaces;
9
10 class BuiltinDatatypeLibraryFactory implements DatatypeLibraryFactory {
11 private final Hashtable cache = new Hashtable ();
12 private final DatatypeLibraryFactory factory;
13 private final DatatypeLibrary builtinDatatypeLibrary
14 = new BuiltinDatatypeLibrary();
15 private DatatypeLibrary lastDatatypeLibrary = null;
16 private String lastDatatypeLibraryUri = null;
17
18 BuiltinDatatypeLibraryFactory(DatatypeLibraryFactory factory) {
19 this.factory = factory;
20 cache.put(WellKnownNamespaces.RELAX_NG_COMPATIBILITY_DATATYPES,
21 new CompatibilityDatatypeLibrary(this));
22 }
23
24 public DatatypeLibrary createDatatypeLibrary(String uri) {
25 if (uri.equals(""))
26 return builtinDatatypeLibrary;
27 if (uri.equals(lastDatatypeLibraryUri))
28 return lastDatatypeLibrary;
29 DatatypeLibrary library = (DatatypeLibrary)cache.get(uri);
30 if (library == null) {
31 if (factory == null)
32 return null;
33 library = factory.createDatatypeLibrary(uri);
34 if (library == null)
35 return null;
36 cache.put(uri, library);
37 }
38 lastDatatypeLibraryUri = uri;
39 return lastDatatypeLibrary = library;
40 }
41 }
42 |
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