Examples with XPathExpression javax.xml.xpath.XPathExpression used on opensource projects

Example 31 with XPathExpression

use of javax.xml.xpath.XPathExpression in project jangaroo-tools by CoreMedia.

the class ASDocScreenScraper method getClassDoc.

private String getClassDoc() throws XPathExpressionException {
    XPath xpath = xPathFactory.newXPath();
    XPathExpression classDoc = xpath.compile("//*[@id='content']//*[name()='div'][@class='MainContent']");
    Node classDocNode = (Node) classDoc.evaluate(document, XPathConstants.NODE);
    if (classDocNode != null) {
        NodeList classDocNodes = classDocNode.getChildNodes();
        return getASDoc(classDocNodes, null);
    }
    return "";
}

Example 32 with XPathExpression

use of javax.xml.xpath.XPathExpression in project perun by CESNET.

the class ExtSourceXML method getValueFromXpath.

/**
	 * Get xml Node and xpath expression to get value from node by this xpath.
	 *
	 * @param node node for getting value from
	 * @param xpathExpression expression for xpath to looking for value in node
	 * @return string extracted from node by xpath
	 * @throws InternalErrorException
	 */
protected String getValueFromXpath(Node node, String xpathExpression) throws InternalErrorException {
    //Prepare xpath expression
    XPathFactory xPathfactory = XPathFactory.newInstance();
    XPath xpath = xPathfactory.newXPath();
    XPathExpression expr;
    try {
        expr = xpath.compile(xpathExpression);
    } catch (XPathExpressionException ex) {
        throw new InternalErrorException("Error when compiling xpath query.", ex);
    }
    String text;
    try {
        text = (String) expr.evaluate(node, XPathConstants.STRING);
    } catch (XPathExpressionException ex) {
        throw new InternalErrorException("Error when evaluate xpath query on node.", ex);
    }
    return text;
}

Example 33 with XPathExpression

use of javax.xml.xpath.XPathExpression in project perun by CESNET.

the class ExtSourceXML method xpathParsing.

/**
	 * Get query and maxResults.
	 * Prepare document and xpathExpression by query.
	 * Get all nodes by xpath from document and parse them one by one.
	 *
	 * The way of xml take from "file" or "uri" (configuration file)
	 *
	 * @param query xpath query from config file
	 * @param maxResults never get more than maxResults results (0 mean unlimited)
	 *
	 * @return List of results, where result is Map<String,String> like <name, value>
	 * @throws InternalErrorException
	 */
protected List<Map<String, String>> xpathParsing(String query, int maxResults) throws InternalErrorException {
    //Prepare result list
    List<Map<String, String>> subjects = new ArrayList<Map<String, String>>();
    //Create new document factory builder
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder;
    try {
        builder = factory.newDocumentBuilder();
    } catch (ParserConfigurationException ex) {
        throw new InternalErrorException("Error when creating newDocumentBuilder.", ex);
    }
    Document doc;
    try {
        if (file != null && !file.isEmpty()) {
            doc = builder.parse(file);
        } else if (uri != null && !uri.isEmpty()) {
            doc = builder.parse(this.createTwoWaySSLConnection(uri));
        } else {
            throw new InternalErrorException("Document can't be parsed, because there is no way (file or uri) to this document in xpathParser.");
        }
    } catch (SAXParseException ex) {
        throw new InternalErrorException("Error when parsing uri by document builder.", ex);
    } catch (SAXException ex) {
        throw new InternalErrorException("Problem with parsing is more complex, not only invalid characters.", ex);
    } catch (IOException ex) {
        throw new InternalErrorException("Error when parsing uri by document builder. Problem with input or output.", ex);
    }
    //Prepare xpath expression
    XPathFactory xPathfactory = XPathFactory.newInstance();
    XPath xpath = xPathfactory.newXPath();
    XPathExpression queryExpr;
    try {
        queryExpr = xpath.compile(query);
    } catch (XPathExpressionException ex) {
        throw new InternalErrorException("Error when compiling xpath query.", ex);
    }
    //Call query on document node and get back nodesets
    NodeList nodeList;
    try {
        nodeList = (NodeList) queryExpr.evaluate(doc, XPathConstants.NODESET);
    } catch (XPathExpressionException ex) {
        throw new InternalErrorException("Error when evaluate xpath query on document.", ex);
    }
    //Test if there is any nodeset in result
    if (nodeList.getLength() == 0) {
        //There is no results, return empty subjects
        return subjects;
    }
    //Iterate through nodes and convert them to Map<String,String>
    for (int i = 0; i < nodeList.getLength(); i++) {
        Node singleNode = nodeList.item(i);
        // remove node from original structure in order to keep access time constant (otherwise is exp.)
        singleNode.getParentNode().removeChild(singleNode);
        Map<String, String> map = convertNodeToMap(singleNode);
        if (map != null)
            subjects.add(map);
        //Reducing results by maxResults
        if (maxResults > 0) {
            if (subjects.size() >= maxResults)
                break;
        }
    }
    this.close();
    return subjects;
}

Example 34 with XPathExpression

use of javax.xml.xpath.XPathExpression in project perun by CESNET.

the class MuPasswordManagerModule method parseUCO.

/**
	 * Parse UCO from XML body response and convert it to map of parameters.
	 *
	 * @param document XML document to be parsed
	 * @param requestID unique ID of a request
	 * @return Map of response params
	 * @throws InternalErrorException
	 */
private Map<String, String> parseUCO(Document document, int requestID) throws InternalErrorException {
    Map<String, String> result = new HashMap<>();
    //Prepare xpath expression
    XPathFactory xPathfactory = XPathFactory.newInstance();
    XPath xpath = xPathfactory.newXPath();
    XPathExpression ucoExpr;
    try {
        ucoExpr = xpath.compile("//resp/uco/text()");
    } catch (XPathExpressionException ex) {
        throw new InternalErrorException("Error when compiling xpath query. Request ID: " + requestID, ex);
    }
    try {
        String uco = (String) ucoExpr.evaluate(document, XPathConstants.STRING);
        result.put("urn:perun:user:attribute-def:def:login-namespace:mu", uco);
    } catch (XPathExpressionException ex) {
        throw new InternalErrorException("Error when evaluate xpath query on resulting document for request ID: " + requestID, ex);
    }
    return result;
}

Example 35 with XPathExpression

use of javax.xml.xpath.XPathExpression in project perun by CESNET.

the class MuPasswordManagerModule method parseResponse.

/**
	 * Parse XML response from IS MU to XML document.
	 *
	 * @param inputStream Stream to be parsed to Document
	 * @param requestID ID of request made to IS MU.
	 * @return XML document for further processing
	 * @throws InternalErrorException
	 */
private Document parseResponse(InputStream inputStream, int requestID) throws InternalErrorException {
    //Create new document factory builder
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder;
    try {
        builder = factory.newDocumentBuilder();
    } catch (ParserConfigurationException ex) {
        throw new InternalErrorException("Error when creating newDocumentBuilder. Request ID: " + requestID, ex);
    }
    String response = null;
    try {
        response = convertStreamToString(inputStream, "UTF-8");
    } catch (IOException ex) {
        log.error("Unable to convert InputStream to String: {}", ex);
    }
    log.trace("Request ID: " + requestID + " Response: " + response);
    Document doc;
    try {
        doc = builder.parse(new InputSource(new StringReader(response)));
    } catch (SAXParseException ex) {
        throw new InternalErrorException("Error when parsing uri by document builder. Request ID: " + requestID, ex);
    } catch (SAXException ex) {
        throw new InternalErrorException("Problem with parsing is more complex, not only invalid characters. Request ID: " + requestID, ex);
    } catch (IOException ex) {
        throw new InternalErrorException("Error when parsing uri by document builder. Problem with input or output. Request ID: " + requestID, ex);
    }
    //Prepare xpath expression
    XPathFactory xPathfactory = XPathFactory.newInstance();
    XPath xpath = xPathfactory.newXPath();
    XPathExpression isErrorExpr;
    XPathExpression getErrorTextExpr;
    XPathExpression getDbErrorTextExpr;
    try {
        isErrorExpr = xpath.compile("//resp/stav/text()");
        getErrorTextExpr = xpath.compile("//resp/error/text()");
        getDbErrorTextExpr = xpath.compile("//resp/dberror/text()");
    } catch (XPathExpressionException ex) {
        throw new InternalErrorException("Error when compiling xpath query. Request ID: " + requestID, ex);
    }
    // OK or ERROR
    String responseStatus;
    try {
        responseStatus = (String) isErrorExpr.evaluate(doc, XPathConstants.STRING);
    } catch (XPathExpressionException ex) {
        throw new InternalErrorException("Error when evaluate xpath query on document to resolve response status. Request ID: " + requestID, ex);
    }
    log.trace("Request ID: " + requestID + " Response status: " + responseStatus);
    if ("OK".equals(responseStatus)) {
        return doc;
    } else {
        try {
            String error = (String) getErrorTextExpr.evaluate(doc, XPathConstants.STRING);
            if (error == null || error.isEmpty()) {
                error = (String) getDbErrorTextExpr.evaluate(doc, XPathConstants.STRING);
            }
            throw new InternalErrorException("IS MU (password manager backend) responded with error to a Request ID: " + requestID + " Error: " + error);
        } catch (XPathExpressionException ex) {
            throw new InternalErrorException("Error when evaluate xpath query on document to resolve error status. Request ID: " + requestID, ex);
        }
    }
}