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.

        // Signature Algorithm
        final XPathExpression sigAlgoExpr = 
            xpath.compile("/s:Envelope/s:Header/wsse:Security/ds:Signature/ds:SignedInfo" 
                              + "/ds:SignatureMethod/@Algorithm");
        
        final String sigMethod =  (String) sigAlgoExpr.evaluate(signedDoc, XPathConstants.STRING);
        assertEquals(expectedSignatureMethod, sigMethod);
        
        // Digest Method Algorithm
        final XPathExpression digestAlgoExpr = xpath.compile(
            "/s:Envelope/s:Header/wsse:Security/ds:Signature/ds:SignedInfo/ds:Reference/ds:DigestMethod");

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        // Digest Method Algorithm
        final XPathExpression digestAlgoExpr = xpath.compile(
            "/s:Envelope/s:Header/wsse:Security/ds:Signature/ds:SignedInfo/ds:Reference/ds:DigestMethod");
        
        final NodeList digestMethodNodes = 
            (NodeList) digestAlgoExpr.evaluate(signedDoc, XPathConstants.NODESET);
        
        for (int i = 0; i < digestMethodNodes.getLength(); i++) {
            Node node = (Node)digestMethodNodes.item(i);
            String digestAlgorithm = node.getAttributes().getNamedItem("Algorithm").getNodeValue();
            assertEquals(expectedDigestAlgorithm, digestAlgorithm);

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        // Canonicalization Algorithm
        final XPathExpression canonAlgoExpr =
            xpath.compile("/s:Envelope/s:Header/wsse:Security/ds:Signature/ds:SignedInfo" 
                              + "/ds:CanonicalizationMethod/@Algorithm");
        final String canonMethod =  (String) canonAlgoExpr.evaluate(signedDoc, XPathConstants.STRING);
        assertEquals(expectedCanonAlgorithm, canonMethod);
    }
    
    // TODO: This method can be removed when runOutInterceptorAndValidateSamlTokenAttached
    // is cleaned up.

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        // Find the SecurityTokenReference for the assertion
        final XPathExpression strExpr = xpath.compile(
            "/s:Envelope/s:Header/wsse:Security/wsse:SecurityTokenReference/wsse:KeyIdentifier");
        
        final NodeList strKeyIdNodes = 
            (NodeList) strExpr.evaluate(signedDoc, XPathConstants.NODESET);
        
        String strId = null;
        for (int i = 0; i < strKeyIdNodes.getLength(); i++) {
            Node keyIdNode = (Node) strKeyIdNodes.item(i);
            String strKey = keyIdNode.getTextContent();

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        // 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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                    for (XmlSchema schema : schemas.getXmlSchemas()) {
                        if (XMLConstants.W3C_XML_SCHEMA_NS_URI.equals(schema.getTargetNamespace())) {
                            continue;
                        }
                        Object src = getSchemaNode(schema, schemas);
                        NodeList nodes = (NodeList)xpe.evaluate(src, XPathConstants.NODESET);
                        if (nodes.getLength() > 0) {
                            String key = schema.getSourceURI();
                            binding = convertToTmpInputSource(d.getDocumentElement(), key);
                            opts.addBindFile(binding);
                            binding = null;

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      // and save result nodes in queryList
      for (int j = 0; j < this.xpathList.size(); j++) {
        XPathFactory factory = XPathFactory.newInstance();
        XPath xpath = factory.newXPath();
        XPathExpression expr = xpath.compile(this.xpathList.get(j));
        Object results = expr.evaluate(doc, XPathConstants.NODESET);
        NodeList nodes = (NodeList) results;
        queryList.add(nodes);
      }


      List<List<Triple>> result = new ArrayList<List<Triple>>();

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    }


    private static void addAlwaysApplicablePolicySets(PolicySet policySet,
                                                      Document doc) 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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    }


    private static void addApplicablePolicySets(PolicySet policySet,
                                         Document doc) throws XPathExpressionException {
        XPathExpression expression = policySet.getAppliesToXPathExpression();
        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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   */
  public IterableElementList xpath(Node doc, String query) throws XPathExpressionException {
    XPathFactory factory = XPathFactory.newInstance();
    XPath xpath = factory.newXPath();
    XPathExpression expr = xpath.compile(query);
    NodeList result = (NodeList) expr.evaluate(doc, XPathConstants.NODESET);
    return new IterableElementList(result);
  }
  
  /**
   * Get the first node result from an XPath query.

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