Mercurial > dive4elements > river
view flys-client/src/main/java/de/intevation/flys/client/server/CrossSectionKMServiceImpl.java @ 2508:4aa70825bde1
map print: generate valid url to access service.
flys-client/trunk@4363 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Wed, 09 May 2012 11:18:24 +0000 |
parents | 9115b2a28be1 |
children |
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package de.intevation.flys.client.server; import java.util.ArrayList; import java.util.HashMap; import java.util.Map; import javax.xml.xpath.XPathConstants; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; import org.apache.log4j.Logger; import com.google.gwt.user.server.rpc.RemoteServiceServlet; import de.intevation.artifacts.common.ArtifactNamespaceContext; import de.intevation.artifacts.common.utils.XMLUtils; import de.intevation.artifacts.httpclient.exceptions.ConnectionException; import de.intevation.artifacts.httpclient.http.HttpClient; import de.intevation.artifacts.httpclient.http.HttpClientImpl; import de.intevation.flys.client.shared.exceptions.ServerException; import de.intevation.flys.client.client.services.CrossSectionKMService; /** * Interact with not documented service. */ public class CrossSectionKMServiceImpl extends RemoteServiceServlet implements CrossSectionKMService { private static final Logger logger = Logger.getLogger(CrossSectionKMServiceImpl.class); /** XPath that points to the found cross section measurements. */ public static final String XPATH_CROSS_SECTIONS = "/cross-sections/cross-section"; /** The error message key that is thrown if an error occured while getting * new data. */ public static final String ERROR_GET_CROSS_SECTION = "error_get_cross_section"; /** * Fetches positions (kms) at which measurements for given cross-sections * exists. * * @param data Map of Integer (cross-section-id) to km. * */ public Map<Integer,Double[]> getCrossSectionKMs( String locale, Map<Integer, Double> data, int nNeighbours) throws ServerException { logger.info("CrossSectionKMService.getCrossSectionKMs"); String url = getServletContext().getInitParameter("server-url"); Document doc = XMLUtils.newDocument(); XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator( doc, ArtifactNamespaceContext.NAMESPACE_URI, ArtifactNamespaceContext.NAMESPACE_PREFIX); Element crossSection = ec.create("cross-sections"); doc.appendChild(crossSection); for(Map.Entry<Integer, Double> oneCrossSection : data.entrySet()) { Element cs = ec.create("cross-section"); cs.setAttribute("id", oneCrossSection.getKey().toString()); cs.setAttribute("km", oneCrossSection.getValue().toString()); cs.setAttribute("n", Integer.valueOf(nNeighbours).toString()); crossSection.appendChild(cs); } HttpClient client = new HttpClientImpl(url, locale); logger.debug("Created httpclient"); try { // Document should contain: // crosse-sections: // attribute(id), attribute(km) attribute(n) Document response = client.callService(url, "cross-section-km", doc); //<cross-sections><cross-section id="1"><line km="19.5" line-id="189"/>... NodeList nodeList = (NodeList) XMLUtils.xpath(response, XPATH_CROSS_SECTIONS, XPathConstants.NODESET); int num = nodeList.getLength(); Map<Integer, Double[]> result = new HashMap<Integer, Double[]>(); try{ for (int i = 0; i < num; i++) { Element csElement = (Element) nodeList.item(i); int idx = Integer.parseInt(csElement.getAttribute("id")); ArrayList<Double> kms = new ArrayList<Double>(); NodeList lineNodes = csElement.getElementsByTagName("line"); int numLines = lineNodes.getLength(); for (int k = 0; k < numLines; k++) { Element line = (Element) lineNodes.item(k); double d = Double.parseDouble(line.getAttribute("km")); kms.add(d); } Double[] doubles = new Double[kms.size()]; kms.toArray(doubles); result.put(Integer.valueOf(idx), doubles); } } catch(NumberFormatException nfe) { logger.error("Response was not parsable"); } return result; } catch (ConnectionException ce) { logger.error("ConnectionExsp", ce); } logger.warn("CrossSectionKMService.getCrossSectionKMS() - FAILED"); throw new ServerException(ERROR_GET_CROSS_SECTION); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :