Examples of org.jaxen.XPath.evaluate()

org.jaxen.XPath.evaluate()
Evaluate this XPath against a given context.
The context of evaluation my be a document, an element, or a set of elements.

If the expression evaluates to a single primitive (String, Number or Boolean) type, it is returned directly. Otherwise, the returned value is a List (a node-set, in the terms of the specification) of values.

When using this method, one must be careful to test the class of the returned objects, and of each of the composite members if a List is returned. If the returned members are XML entities, they will be the actual Document, Element or Attribute objects as defined by the concrete XML object-model implementation, directly from the context document. This does not return copies of anything, but merely returns references to entities within the source document.
@param The node, nodeset or Context object for evaluation. This value can be null @return The result of evaluating the XPath expressionagainst the supplied context.

    }


    public void testEqualsNumberNodeset() throws JaxenException
    {
        XPath xpath = new DOMXPath( "//c = 12" );
        Boolean result = (Boolean) xpath.evaluate( doc );
        assertTrue(result.booleanValue());
    }


    public void testNotEqualsNumberNodeset() throws JaxenException
    {

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    }


    public void testNotEqualsNumberNodeset() throws JaxenException
    {
        XPath xpath = new DOMXPath( "//c != 256" );
        Boolean result = (Boolean) xpath.evaluate( doc );
        assertTrue(result.booleanValue());
    }


    public void testEqualsBooleanNodeset1() throws JaxenException
    {

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    }


    public void testEqualsBooleanNodeset1() throws JaxenException
    {
        XPath xpath = new DOMXPath( "//c = true()" );
        Boolean result = (Boolean) xpath.evaluate( doc );
        assertTrue(result.booleanValue());
    }


    public void testEqualsBooleanNodeset2() throws JaxenException
    {

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    public void testEqualsBooleanNodeset2() throws JaxenException
    {
        //an empty nodeset should be equal to false()
        XPath xpath = new DOMXPath( "//d = false()" );
        Boolean result = (Boolean) xpath.evaluate( doc );
        assertTrue(result.booleanValue());
    }




    public void testNotEqualsBooleanNodeset1() throws JaxenException

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    public void testNotEqualsBooleanNodeset1() throws JaxenException
    {
        XPath xpath = new DOMXPath( "//c != false()" );
        Boolean result = (Boolean) xpath.evaluate( doc );
        assertTrue(result.booleanValue());
    }


    public void testNotEqualsBooleanNodeset2() throws JaxenException
    {

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    public void testNotEqualsBooleanNodeset2() throws JaxenException
    {
        //an empty nodeset should be not equal to true()  
        XPath xpath = new DOMXPath( "//d != true()" );
        Boolean result = (Boolean) xpath.evaluate( doc );
        assertTrue(result.booleanValue());
    }


}

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    }    
    
    public void testNamespaceURIOfEmptyNodeSetIsEmptyString() throws JaxenException
    {
        XPath xpath = new DOMXPath( "namespace-uri(/aaa)" );
        String result = (String) xpath.evaluate(doc);
        assertEquals("", result);
    }    


    public void testNamespaceURIOfProcessingInstructionIsEmptyString() throws JaxenException
    {

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    public void testNamespaceURIOfProcessingInstructionIsEmptyString() throws JaxenException
    {
        XPath xpath = new DOMXPath( "namespace-uri(/processing-instruction())" );
        ProcessingInstruction pi = doc.createProcessingInstruction("target", "value");
        doc.appendChild(pi);
        String result = (String) xpath.evaluate(doc);
        assertEquals("", result);
    }    


    public void testNamespaceURIOfAttribute() throws JaxenException
    {

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    public void testNamespaceURIOfAttribute() throws JaxenException
    {
        XPath xpath = new DOMXPath( "namespace-uri(/*/@*)" );
        Attr a = doc.createAttribute("name");
        doc.getDocumentElement().setAttributeNode(a);
        Object result = xpath.evaluate(doc);
        assertEquals("", result);
    }    


    public void testNamespaceURIOfAttributeInNamespace() throws JaxenException
    {

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    public void testNamespaceURIOfAttributeInNamespace() throws JaxenException
    {
        XPath xpath = new DOMXPath( "namespace-uri(/*/@*)" );
        Attr a = doc.createAttributeNS("http://www.w3.org/", "pre:name");
        doc.getDocumentElement().setAttributeNode(a);
        Object result = xpath.evaluate(doc);
        assertEquals("http://www.w3.org/", result);
    }    


    public void testNamespaceURIOfTextIsEmptyString() throws JaxenException
    {

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