Examples of org.jaxen.NamespaceContext

org.jaxen.NamespaceContext
Resolves namespace prefixes to namespace URIs.
The prefixes used within an XPath expression are independant of those used within any target document. When evaluating an XPath against a document, only the resolved namespace URIs are compared, not their prefixes.

A NamespaceContext is responsible for translating prefixes as they appear in XPath expressions into URIs for comparison. A document's prefixes are resolved internal to the document based upon its own namespace nodes.
@see BaseXPath @see Navigator#getElementNamespaceUri @see Navigator#getAttributeNamespaceUri @author bob mcwhirter

    }
    
    if (xmlNamespaceMap != null && xmlNamespaceMap.size() > 0)
    {
      if (context == null) {
        context = new NamespaceContext() {
          
          public String translateNamespacePrefixToUri(String prefix) {
            return xmlNamespaceMap.get(prefix);
          }
        };

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    } 
    
    public void testAddNamespaceWithNonSimpleNamespaceContext() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("/b/c");
        xpath.setNamespaceContext(new NamespaceContext() {


            public String translateNamespacePrefixToUri(String prefix) {
                return prefix;
            }

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    } 
    
    public void testAddNamespaceWithNonSimpleNamespaceContext() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("/b/c");
        xpath.setNamespaceContext(new NamespaceContext() {


            public String translateNamespacePrefixToUri(String prefix) {
                return prefix;
            }

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        XPath xpath = new DOMXPath("foo");
        xpath.addNamespace("cheese",
                           "http://cheese.org");
        xpath.addNamespace("squeeze",
                           "http://squeeze.org");
        NamespaceContext nsContext = xpath.getNamespaceContext();
        assertEquals( "http://cheese.org",
                      nsContext.translateNamespacePrefixToUri( "cheese" ) );
        assertEquals( "http://squeeze.org",
                      nsContext.translateNamespacePrefixToUri( "squeeze" ) );


    }

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  private static XPath prepare(String xpath, NodeWrapper<? extends Node> root) {
    try {
      MyNavigator nav = new MyNavigator(root);
      XPath xp = nav.parseXPath(xpath); // TODO: cache results of XPath parsing (per thread)?
      xp.setNamespaceContext(new NamespaceContext() {
        public String translateNamespacePrefixToUri(String prefix) {
          String ns = XML.getThreadNamespaceMap().get(prefix);
          if (ns == null)
            ns = XML.getNamespaceMap().get(prefix);
          return ns;

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org.jaxen.test.AddNamespaceTest

org.jaxen.test.BaseXPathTest

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