Examples of javax.xml.xpath.XPathExpression.evaluate()

javax.xml.xpath.XPathExpression.evaluate()

Evaluate the compiled XPath expression in the specified context and return the result as the specified type.

See Evaluation of XPath Expressions for context item evaluation, variable, function and QName resolution and return type conversion.

If returnType is not one of the types defined in {@link XPathConstants}, then an IllegalArgumentException is thrown.

If a null value is provided for item, an empty document will be used for the context. If returnType is null, then a NullPointerException is thrown.
@param item The starting context (node or node list, for example). @param returnType The desired return type. @return The Object that is the result of evaluating the expression and converting the result toreturnType. @throws XPathExpressionException If the expression cannot be evaluated. @throws IllegalArgumentException If returnType is not one of the types defined in {@link XPathConstants}. @throws NullPointerException If returnType is null.

        // Verify STR is included in the signature references
        final XPathExpression sigRefExpr = xpath.compile(
            "/s:Envelope/s:Header/wsse:Security/ds:Signature/ds:SignedInfo/ds:Reference");
        
        final NodeList sigReferenceNodes = 
            (NodeList) sigRefExpr.evaluate(signedDoc, XPathConstants.NODESET);
        
        boolean foundStrReference = false;
        for (int i = 0; i < sigReferenceNodes.getLength(); i++) {
            Node sigRefNode = (Node) sigReferenceNodes.item(i);
            String sigRefURI = sigRefNode.getAttributes().getNamedItem("URI").getNodeValue();

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        // Advance the reader so that the namespace context changes its prefix/namespace mapping
        reader.nextTag();
        reader.close();


        Document doc = domHelper.load(XML);
        NodeList nodes = (NodeList)expression.evaluate(doc, XPathConstants.NODESET);
        Assert.assertEquals(1, nodes.getLength());
        Node node = nodes.item(0);
        Assert.assertTrue(node instanceof Element);
        Assert.assertEquals(node.getNodeName(), "c:child1");
    }

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        // Advance the reader so that the namespace context changes its prefix/namespace mapping
        reader.nextTag();
        reader.close();


        Document doc = domHelper.load(XML);
        NodeList nodes = (NodeList)expression.evaluate(doc, XPathConstants.NODESET);
        Assert.assertEquals(1, nodes.getLength());
        Node node = nodes.item(0);
        Assert.assertTrue(node instanceof Element);
        Assert.assertEquals(node.getNodeName(), "c:child1");
    }

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        InputSource xml = new InputSource(getClass().getResourceAsStream("Calculator.composite"));
        String str = "//sca:composite/sca:component[IntentRefs('sca:confidentiality')]";
        str = normalize(str, "sca");
        // Test the rewrite of xpath so that the self:node() is passed into the SCA function
        XPathExpression exp = xpath.compile(str);
        Object result = exp.evaluate(xml, XPathConstants.NODESET);
        Assert.assertTrue(result instanceof NodeList);
        NodeList nodes = (NodeList)result;
        Assert.assertEquals(1, nodes.getLength());
    }

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        InputSource xml = new InputSource(getClass().getResourceAsStream("Calculator.composite"));
        String str = " //sca:composite/sca:component[sca:IntentRefs('sca:confidentiality')]";
        str = normalize(str, "sca");
        // Test the rewrite of xpath so that the self:node() is passed into the SCA function
        XPathExpression exp = xpath.compile(str);
        Object result = exp.evaluate(xml, XPathConstants.NODESET);
        Assert.assertTrue(result instanceof NodeList);
        NodeList nodes = (NodeList)result;
        Assert.assertEquals(1, nodes.getLength());
    }

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        InputSource xml = new InputSource(getClass().getResourceAsStream("Calculator.composite"));
        String str = "   IntentRefs('sca:confidentiality')  ";
        str = normalize(str, "sca");
        // Test the rewrite of xpath so that the self:node() is passed into the SCA function
        XPathExpression exp = xpath.compile(str);
        Object result = exp.evaluate(xml, XPathConstants.NODESET);
        Assert.assertTrue(result instanceof NodeList);
        NodeList nodes = (NodeList)result;
        Assert.assertEquals(1, nodes.getLength());
    }
    @Test

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    }
    @Test
    public void testURIRef() throws Exception {
        InputSource xml = new InputSource(getClass().getResourceAsStream("Calculator.composite"));
        XPathExpression exp = xpath.compile(normalize("sca:composite/sca:component[sca:URIRef('AddServiceComponent')]","sca"));
        Object result = exp.evaluate(xml, XPathConstants.NODESET);
        Assert.assertTrue(result instanceof NodeList);
        NodeList nodes = (NodeList)result;
        // Assert.assertEquals(1, nodes.getLength());
    }

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    @Test
    public void testInterfaceRef() throws Exception {
        InputSource xml = new InputSource(getClass().getResourceAsStream("Calculator.composite"));
        XPathExpression exp = xpath.compile(normalize("//sca:composite/sca:component/sca:service[sca:InterfaceRef('AddService')]","sca"));
        Object result = exp.evaluate(xml, XPathConstants.NODESET);
        Assert.assertTrue(result instanceof NodeList);
        NodeList nodes = (NodeList)result;
        // Assert.assertEquals(1, nodes.getLength());
    }

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    @Test
    public void testOperationRef() throws Exception {
        InputSource xml = new InputSource(getClass().getResourceAsStream("Calculator.composite"));
        XPathExpression exp = xpath.compile(normalize("//sca:composite/sca:component/sca:reference[sca:OperationRef('AddService/add')]","sca"));
        Object result = exp.evaluate(xml, XPathConstants.NODESET);
        Assert.assertTrue(result instanceof NodeList);
        NodeList nodes = (NodeList)result;
        // Assert.assertEquals(1, nodes.getLength());
    }

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    private static void addAlwaysApplicablePolicySets(PolicySet policySet,
                                                      Document doc,
                                                      int prefixCount) throws XPathExpressionException {
        XPathExpression expression = policySet.getAlwaysAppliesToXPathExpression();
        NodeList result = (NodeList)expression.evaluate(doc, XPathConstants.NODESET);


        if (result != null) {
            for (int counter = 0; counter < result.getLength(); ++counter) {
                Node aResultNode = result.item(counter);

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