Examples of javax.xml.xpath.XPath.compile()

javax.xml.xpath.XPath.compile()

Compile an XPath expression for later evaluation.

If expression contains any {@link XPathFunction}s, they must be available via the {@link XPathFunctionResolver}. An {@link XPathExpressionException} will be thrown if the XPathFunctioncannot be resovled with the XPathFunctionResolver.

If expression is null, a NullPointerException is thrown.
@param expression The XPath expression. @return Compiled XPath expression. @throws XPathExpressionException If expression cannot be compiled. @throws NullPointerException If expression is null.

   * @throws XPathExpressionException 
   */
  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);
  }
  
  /**

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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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      for (Entry<String, DiagramNode> entry : elementBoundsFromBpmnDi.entrySet()) {
        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)) {

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     * @throws XPathParseException when the given expression cannot be parsed
     */
    static XPathExpression createXPathExpression(String expression) {
        try {
            XPath xpath = createXPath();
            javax.xml.xpath.XPathExpression xpathExpression = xpath.compile(expression);
            return new Jaxp13XPathExpression(xpathExpression);
        }
        catch (XPathExpressionException ex) {
            throw new org.springframework.xml.xpath.XPathParseException(
                    "Could not compile [" + expression + "] to a XPathExpression: " + ex.getMessage(), ex);

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        try {
            XPath xpath = createXPath();
            SimpleNamespaceContext namespaceContext = new SimpleNamespaceContext();
            namespaceContext.setBindings(namespaces);
            xpath.setNamespaceContext(namespaceContext);
            javax.xml.xpath.XPathExpression xpathExpression = xpath.compile(expression);
            return new Jaxp13XPathExpression(xpathExpression);
        }
        catch (XPathExpressionException ex) {
            throw new org.springframework.xml.xpath.XPathParseException(
                    "Could not compile [" + expression + "] to a XPathExpression: " + ex.getMessage(), ex);

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  public GGXMLTrailTransactionFinder(boolean enableRegex) throws Exception
  {
    reset();
    XPathFactory xpathFactory = XPathFactory.newInstance();
    XPath xpath = xpathFactory.newXPath();
    _expr = xpath.compile(SCN_XPATH_STR);
    _rexpr = Pattern.compile(SCN_REGEX_STR);
    _enableRegex = enableRegex;
    _minScn = Long.MAX_VALUE;
    _maxScn = Long.MIN_VALUE;
  }

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        final NamespaceContext nsContext = this.getNamespaceContext();
        xpath.setNamespaceContext(nsContext);
        
        // 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);

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        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");
        
        final NodeList digestMethodNodes = 
            (NodeList) digestAlgoExpr.evaluate(signedDoc, XPathConstants.NODESET);

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            assertEquals(expectedDigestAlgorithm, digestAlgorithm);
        }
        
        // 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);
    }

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        XPath xpath = factory.newXPath();
        final NamespaceContext nsContext = this.getNamespaceContext();
        xpath.setNamespaceContext(nsContext);
        
        // 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);

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