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25 
26 package com.sun.org.apache.xerces.internal.util;
27 
28 import java.util.Iterator;
29 import java.util.List;
30 import javax.xml.namespace.NamespaceContext;
31 
32 /**
33  * Writing a wrapper to re-use most of the namespace functionality
34  * already provided by NamespaceSupport, which implements NamespaceContext
35  * from XNI. It would be good if we can change the XNI NamespaceContext
36  * interface to implement the JAXP NamespaceContext interface.
37  *
38  * Note that NamespaceSupport assumes the use of symbols. Since this class
39  * can be exposed to the application, we must intern all Strings before
40  * calling NamespaceSupport methods.
41  *
42  * @author  Neeraj Bajaj
43  * @author Santiago PericasGeertsen
44  *
45  */
46 public class NamespaceContextWrapper implements NamespaceContext {
47 
48     private com.sun.org.apache.xerces.internal.xni.NamespaceContext fNamespaceContext;
49 
NamespaceContextWrapper(NamespaceSupport namespaceContext)50     public NamespaceContextWrapper(NamespaceSupport namespaceContext) {
51         fNamespaceContext = namespaceContext ;
52     }
53 
getNamespaceURI(String prefix)54     public String getNamespaceURI(String prefix) {
55         if (prefix == null) {
56             throw new IllegalArgumentException("Prefix can't be null");
57         }
58         return fNamespaceContext.getURI(prefix.intern());
59     }
60 
getPrefix(String namespaceURI)61     public String getPrefix(String namespaceURI) {
62         if (namespaceURI == null) {
63             throw new IllegalArgumentException("URI can't be null.");
64         }
65         return fNamespaceContext.getPrefix(namespaceURI.intern());
66     }
67 
68     /**
69      * TODO: Namespace doesn't give information giving multiple prefixes for
70      * the same namespaceURI.
71      */
getPrefixes(String namespaceURI)72     public Iterator<String> getPrefixes(String namespaceURI) {
73         if (namespaceURI == null) {
74             throw new IllegalArgumentException("URI can't be null.");
75         }
76         else {
77            List<String> vector =
78                 ((NamespaceSupport) fNamespaceContext).getPrefixes(namespaceURI.intern());
79             return vector.iterator();
80         }
81     }
82 
83     /**
84      * This method supports all functions in the NamespaceContext utility class
85      */
getNamespaceContext()86     public com.sun.org.apache.xerces.internal.xni.NamespaceContext getNamespaceContext() {
87         return fNamespaceContext;
88     }
89 
90 }
91