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.

            Document document = documentBuilderFactory.newDocumentBuilder().parse(new ByteArrayInputStream(baos.toByteArray()));
            NodeList nodeList = document.getElementsByTagNameNS(WSSConstants.TAG_dsig_Signature.getNamespaceURI(), WSSConstants.TAG_dsig_Signature.getLocalPart());
            Assert.assertEquals(nodeList.item(0).getParentNode().getLocalName(), WSSConstants.TAG_wsse_Security.getLocalPart());


            XPathExpression xPathExpression = getXPath("/soap:Envelope/soap:Header/wsse:Security/dsig:Signature/dsig:KeyInfo/wsse:SecurityTokenReference/wsse:KeyIdentifier[@ValueType='http://docs.oasis-open.org/wss/oasis-wss-soap-message-security-1.1#ThumbprintSHA1']");
            Node node = (Node) xPathExpression.evaluate(document, XPathConstants.NODE);
            Assert.assertNotNull(node);


            nodeList = document.getElementsByTagNameNS(WSSConstants.TAG_dsig_Reference.getNamespaceURI(), WSSConstants.TAG_dsig_Reference.getLocalPart());
            Assert.assertEquals(nodeList.getLength(), 1);

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            properties.setProperty(WSHandlerConstants.SIG_KEY_ID, "Thumbprint");
            Document securedDocument = doOutboundSecurityWithWSS4J(sourceDocument, action, properties);


            //some test that we can really sure we get what we want from WSS4J
            XPathExpression xPathExpression = getXPath("/soap:Envelope/soap:Header/wsse:Security/dsig:Signature/dsig:KeyInfo/wsse:SecurityTokenReference/wsse:KeyIdentifier[@ValueType='http://docs.oasis-open.org/wss/oasis-wss-soap-message-security-1.1#ThumbprintSHA1']");
            Node node = (Node) xPathExpression.evaluate(securedDocument, XPathConstants.NODE);
            Assert.assertNotNull(node);


            javax.xml.transform.Transformer transformer = TRANSFORMER_FACTORY.newTransformer();
            transformer.transform(new DOMSource(securedDocument), new StreamResult(baos));
        }

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            Document document = documentBuilderFactory.newDocumentBuilder().parse(new ByteArrayInputStream(baos.toByteArray()));
            NodeList nodeList = document.getElementsByTagNameNS(WSSConstants.TAG_dsig_Signature.getNamespaceURI(), WSSConstants.TAG_dsig_Signature.getLocalPart());
            Assert.assertEquals(nodeList.item(0).getParentNode().getLocalName(), WSSConstants.TAG_wsse_Security.getLocalPart());


            XPathExpression xPathExpression = getXPath("/soap:Envelope/soap:Header/wsse:Security/dsig:Signature/dsig:KeyInfo/wsse:SecurityTokenReference/wsse:KeyIdentifier[@ValueType='http://docs.oasis-open.org/wss/oasis-wss-soap-message-security-1.1#ThumbprintSHA1']");
            Node node = (Node) xPathExpression.evaluate(document, XPathConstants.NODE);
            Assert.assertNotNull(node);


            nodeList = document.getElementsByTagNameNS(WSSConstants.TAG_dsig_Reference.getNamespaceURI(), WSSConstants.TAG_dsig_Reference.getLocalPart());
            Assert.assertEquals(nodeList.getLength(), 1);

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            XPathExpression xPathExpression =
                    getXPath("/soap:Envelope/soap:Header/wsse:Security/dsig:Signature/dsig:KeyInfo/" +
                            "wsse:SecurityTokenReference/wsse:KeyIdentifier[@ValueType=" +
                            "'http://docs.oasis-open.org/wss/oasis-wss-soap-message-security-1.1#EncryptedKeySHA1']");
            Node node = (Node) xPathExpression.evaluate(document, XPathConstants.NODE);
            Assert.assertNotNull(node);


            nodeList = document.getElementsByTagNameNS(WSSConstants.TAG_dsig_Reference.getNamespaceURI(), WSSConstants.TAG_dsig_Reference.getLocalPart());
            Assert.assertEquals(nodeList.getLength(), 1);

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            //some test that we can really sure we get what we want from WSS4J
            XPathExpression xPathExpression =
                    getXPath("/soap:Envelope/soap:Header/wsse:Security/dsig:Signature/dsig:KeyInfo/" +
                                    "wsse:SecurityTokenReference/wsse:KeyIdentifier[@ValueType=" +
                                    "'http://docs.oasis-open.org/wss/oasis-wss-soap-message-security-1.1#EncryptedKeySHA1']");
            Node node = (Node) xPathExpression.evaluate(securedDocument, XPathConstants.NODE);
            Assert.assertNotNull(node);


            javax.xml.transform.Transformer transformer = TRANSFORMER_FACTORY.newTransformer();
            transformer.transform(new DOMSource(securedDocument), new StreamResult(baos));
        }

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   */
  public static NodeIterator queryXPath(Node root, String query) throws XPathExpressionException {
    if (root == null || query == null) return new NodeIterator(null);
    XPath xpath = XPathFactory.newInstance().newXPath();
    XPathExpression expr = xpath.compile(query);
    NodeList result = (NodeList)expr.evaluate(root, XPathConstants.NODESET);
    return new NodeIterator(result);
  }


  /**
   * Execute an XPATH query for a list of elements.

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   */
  public static ElementIterator queryXPathElements(Node root, String query) throws XPathExpressionException {
    if (root == null || query == null) return new ElementIterator(null);
    XPath xpath = XPathFactory.newInstance().newXPath();
    XPathExpression expr = xpath.compile(query);
    NodeList result = (NodeList)expr.evaluate(root, XPathConstants.NODESET);
    return new ElementIterator(result);
  }
  
  /**
   * Remove white spaces in the text nodes.

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        XPath xpath = XPathFactory.newInstance().newXPath();
        String text;
        try
        {
            XPathExpression expression = xpath.compile(xpathExpression);
            text = (String) expression.evaluate(document, XPathConstants.STRING);
        }
        catch (XPathExpressionException e)
        {
            throw new RuntimeException(e);
        }

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        String elementId = entry.getKey();
        DiagramNode elementBounds = entry.getValue();
        String expression = "local-name(//bpmn:*[@id = '" + elementId + "'])";
        try {
          XPathExpression xPathExpression = xPath.compile(expression);
          String elementLocalName = xPathExpression.evaluate(bpmnModel);
          if (!"participant".equals(elementLocalName) 
                  && !"lane".equals(elementLocalName)
                  && !"textAnnotation".equals(elementLocalName)
                  && !"group".equals(elementLocalName)) {
            elementBounds.setX(elementBounds.getX() - elementBounds.getWidth()/2);

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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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