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.

         {
            Node node = nodes.item(i);
            String name = (String)nameExp.evaluate(node, XPathConstants.STRING);
            String userAgentPattern = (String)userAgentPatternExp.evaluate(node, XPathConstants.STRING);
            String preferredMimeType = (String)preferredMimeTypeExp.evaluate(node, XPathConstants.STRING);
            String renderer = (String)rendererExp.evaluate(node, XPathConstants.STRING);
            HttpClientType clientInfo;
            if (renderer != null && renderer.length() > 0)
            {
               clientInfo = new HttpClientType(name, userAgentPattern, preferredMimeType, renderer);
            }

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      try
      {
         Document doc = XMLTools.getDocumentBuilderFactory().newDocumentBuilder().parse(new ByteArrayInputStream(bytes));
         
         //
         NodeList nodes = (NodeList)expr.evaluate(doc, XPathConstants.NODESET);


         //
         for (int i = 0;i < nodes.getLength();i++)
         {
            Element urlPatternElt = (Element)nodes.item(i);

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      Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder()
            .parse(new ByteArrayInputStream(descriptor.getBytes()));


      XPathExpression xPathExpression = XPathFactory.newInstance().newXPath().compile("/web-app/servlet/servlet-name");


      NodeList nodes = (NodeList) xPathExpression.evaluate(doc, XPathConstants.NODESET);


      List<String> servletNames = new ArrayList<String>();
      for (int i = 0; i < nodes.getLength(); i++)
      {
         Node node = nodes.item(i);

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      try
      {
         Document doc = XMLTools.getDocumentBuilderFactory().newDocumentBuilder().parse(new ByteArrayInputStream(bytes));
         
         //
         NodeList nodes = (NodeList)expr.evaluate(doc, XPathConstants.NODESET);


         //
         for (int i = 0;i < nodes.getLength();i++)
         {
            Element urlPatternElt = (Element)nodes.item(i);

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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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            }
            try {
                XPathFactory xpfactory = XPathFactory.newInstance();
                XPath xpath = xpfactory.newXPath();
                XPathExpression exp = xpath.compile(contentFilter.getContent().get(0).toString());
                Boolean ret = (Boolean) exp.evaluate(content, XPathConstants.BOOLEAN);
                return ret.booleanValue();
            } catch (XPathExpressionException e) {
                log.warn("Could not filter notification", e);
            }
            return false;

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        // 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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