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

Example 96 with XPathExpression

use of javax.xml.xpath.XPathExpression in project ddf by codice.

the class XPathCache method getCompiledExpression.

public static XPathExpression getCompiledExpression(String xpathExpressionkey) throws XPathExpressionException, NullPointerException {
    // go to cache, check if we have the compiled expression
    XPathExpression compiledExpression = expressionMap.get(xpathExpressionkey);
    if (compiledExpression == null) {
        // must compile new expression and place in the map
        compiledExpression = XPATH.compile(xpathExpressionkey);
        expressionMap.put(xpathExpressionkey, compiledExpression);
    }
    return compiledExpression;
}

Example 97 with XPathExpression

use of javax.xml.xpath.XPathExpression in project ddf by codice.

the class XPathHelper method evaluate.

/**
     * @param xpathExpressionKey
     * @param returnType
     * @param nsContext
     * @return
     * @throws XPathExpressionException
     */
public synchronized Object evaluate(String xpathExpressionKey, QName returnType, NamespaceContext nsContext) throws XPathExpressionException {
    XPathCache.getXPath().setNamespaceContext(nsContext);
    XPathExpression compiledExpression = XPathCache.getCompiledExpression(xpathExpressionKey);
    Thread thread = Thread.currentThread();
    ClassLoader loader = thread.getContextClassLoader();
    thread.setContextClassLoader(this.getClass().getClassLoader());
    DocumentBuilder documentBuilder;
    byte[] array;
    try (ByteArrayOutputStream bos = new ByteArrayOutputStream()) {
        documentBuilder = dbf.newDocumentBuilder();
        TransformerFactory transformerFactory = TransformerFactory.newInstance();
        Transformer transformer = transformerFactory.newTransformer();
        DOMSource source = new DOMSource(document);
        StreamResult result = new StreamResult(bos);
        transformer.transform(source, result);
        array = bos.toByteArray();
    } catch (IOException | ParserConfigurationException | TransformerException e) {
        throw new XPathExpressionException(e);
    }
    try (ByteArrayInputStream bis = new ByteArrayInputStream(array)) {
        return compiledExpression.evaluate(documentBuilder.parse(bis), returnType);
    } catch (IOException | SAXException e) {
        throw new XPathExpressionException(e);
    } finally {
        thread.setContextClassLoader(loader);
    }
}

Example 98 with XPathExpression

use of javax.xml.xpath.XPathExpression in project ddf by codice.

the class GmdTransformer method setMetacardLocationFromBoundingPolygonPoints.

private void setMetacardLocationFromBoundingPolygonPoints(Metacard metacard) {
    try (InputStream inputStream = getSourceInputStream()) {
        DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
        domFactory.setNamespaceAware(false);
        try {
            domFactory.setFeature("http://apache.org/xml/features/nonvalidating/load-dtd-grammar", false);
            domFactory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
        } catch (ParserConfigurationException e) {
            LOGGER.debug("Unable to configure features on document builder.", e);
        }
        DocumentBuilder builder = domFactory.newDocumentBuilder();
        Document document = builder.parse(inputStream);
        XPath xPath = XPathFactory.newInstance().newXPath();
        XPathExpression dataExpression = xPath.compile(GmdConstants.BOUNDING_POLYGON_POINT_PATH);
        NodeList dataList = (NodeList) dataExpression.evaluate(document, XPathConstants.NODESET);
        if (dataList.getLength() > 0) {
            List<Coordinate> coordinates = new ArrayList<>();
            for (int i = 0; i < dataList.getLength(); i++) {
                Node node = dataList.item(i);
                String[] coordinateStrings = node.getTextContent().split(" ");
                if (coordinateStrings.length == 2) {
                    Double lat = Double.parseDouble(coordinateStrings[0]);
                    Double lon = Double.parseDouble(coordinateStrings[1]);
                    Coordinate coordinate = new Coordinate(lat, lon);
                    coordinates.add(coordinate);
                }
            }
            if (CollectionUtils.isNotEmpty(coordinates)) {
                // Close the polygon
                coordinates.add(coordinates.get(0));
                LinearRing linearRing = factory.createLinearRing(coordinates.toArray(new Coordinate[coordinates.size()]));
                String wkt = WKT_WRITER_THREAD_LOCAL.get().write(factory.createPolygon(linearRing, null));
                if (wkt != null) {
                    metacard.setAttribute(new AttributeImpl(Core.LOCATION, wkt));
                }
            }
        }
    } catch (NumberFormatException | ParserConfigurationException | IOException | SAXException | XPathExpressionException e) {
        LOGGER.debug("Unable to parse location in XML document.  Metacard location will not be set.", e);
    }
}