Mercurial > dive4elements > river
comparison flys-client/src/main/java/org/dive4elements/river/client/server/CrossSectionKMServiceImpl.java @ 5834:f507086aa94b
Repaired internal references.
| author | Sascha L. Teichmann <teichmann@intevation.de> |
|---|---|
| date | Thu, 25 Apr 2013 12:31:32 +0200 |
| parents | flys-client/src/main/java/de/intevation/flys/client/server/CrossSectionKMServiceImpl.java@9115b2a28be1 |
| children | 821a02bbfb4e |
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| 5833:a2bdc0f524e8 | 5834:f507086aa94b |
|---|---|
| 1 package de.intevation.flys.client.server; | |
| 2 | |
| 3 import java.util.ArrayList; | |
| 4 import java.util.HashMap; | |
| 5 import java.util.Map; | |
| 6 | |
| 7 import javax.xml.xpath.XPathConstants; | |
| 8 | |
| 9 import org.w3c.dom.Document; | |
| 10 import org.w3c.dom.Element; | |
| 11 import org.w3c.dom.NodeList; | |
| 12 | |
| 13 import org.apache.log4j.Logger; | |
| 14 | |
| 15 import com.google.gwt.user.server.rpc.RemoteServiceServlet; | |
| 16 | |
| 17 import de.intevation.artifacts.common.ArtifactNamespaceContext; | |
| 18 import de.intevation.artifacts.common.utils.XMLUtils; | |
| 19 | |
| 20 import de.intevation.artifacts.httpclient.exceptions.ConnectionException; | |
| 21 import de.intevation.artifacts.httpclient.http.HttpClient; | |
| 22 import de.intevation.artifacts.httpclient.http.HttpClientImpl; | |
| 23 | |
| 24 import de.intevation.flys.client.shared.exceptions.ServerException; | |
| 25 import de.intevation.flys.client.client.services.CrossSectionKMService; | |
| 26 | |
| 27 /** | |
| 28 * Interact with not documented service. | |
| 29 */ | |
| 30 public class CrossSectionKMServiceImpl | |
| 31 extends RemoteServiceServlet | |
| 32 implements CrossSectionKMService | |
| 33 { | |
| 34 private static final Logger logger = | |
| 35 Logger.getLogger(CrossSectionKMServiceImpl.class); | |
| 36 | |
| 37 /** XPath that points to the found cross section measurements. */ | |
| 38 public static final String XPATH_CROSS_SECTIONS | |
| 39 = "/cross-sections/cross-section"; | |
| 40 | |
| 41 /** The error message key that is thrown if an error occured while getting | |
| 42 * new data. */ | |
| 43 public static final String ERROR_GET_CROSS_SECTION | |
| 44 = "error_get_cross_section"; | |
| 45 | |
| 46 | |
| 47 /** | |
| 48 * Fetches positions (kms) at which measurements for given cross-sections | |
| 49 * exists. | |
| 50 * | |
| 51 * @param data Map of Integer (cross-section-id) to km. | |
| 52 * | |
| 53 */ | |
| 54 public Map<Integer,Double[]> getCrossSectionKMs( | |
| 55 String locale, | |
| 56 Map<Integer, Double> data, | |
| 57 int nNeighbours) | |
| 58 throws ServerException | |
| 59 { | |
| 60 logger.info("CrossSectionKMService.getCrossSectionKMs"); | |
| 61 | |
| 62 String url = getServletContext().getInitParameter("server-url"); | |
| 63 | |
| 64 Document doc = XMLUtils.newDocument(); | |
| 65 | |
| 66 XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator( | |
| 67 doc, | |
| 68 ArtifactNamespaceContext.NAMESPACE_URI, | |
| 69 ArtifactNamespaceContext.NAMESPACE_PREFIX); | |
| 70 Element crossSection = ec.create("cross-sections"); | |
| 71 | |
| 72 doc.appendChild(crossSection); | |
| 73 | |
| 74 for(Map.Entry<Integer, Double> oneCrossSection : data.entrySet()) { | |
| 75 Element cs = ec.create("cross-section"); | |
| 76 cs.setAttribute("id", oneCrossSection.getKey().toString()); | |
| 77 cs.setAttribute("km", oneCrossSection.getValue().toString()); | |
| 78 cs.setAttribute("n", Integer.valueOf(nNeighbours).toString()); | |
| 79 crossSection.appendChild(cs); | |
| 80 } | |
| 81 | |
| 82 HttpClient client = new HttpClientImpl(url, locale); | |
| 83 logger.debug("Created httpclient"); | |
| 84 | |
| 85 try { | |
| 86 // Document should contain: | |
| 87 // crosse-sections: | |
| 88 // attribute(id), attribute(km) attribute(n) | |
| 89 Document response = client.callService(url, "cross-section-km", doc); | |
| 90 //<cross-sections><cross-section id="1"><line km="19.5" line-id="189"/>... | |
| 91 | |
| 92 NodeList nodeList = (NodeList) XMLUtils.xpath(response, | |
| 93 XPATH_CROSS_SECTIONS, | |
| 94 XPathConstants.NODESET); | |
| 95 | |
| 96 int num = nodeList.getLength(); | |
| 97 | |
| 98 Map<Integer, Double[]> result = new HashMap<Integer, Double[]>(); | |
| 99 | |
| 100 try{ | |
| 101 for (int i = 0; i < num; i++) { | |
| 102 Element csElement = (Element) nodeList.item(i); | |
| 103 | |
| 104 int idx = Integer.parseInt(csElement.getAttribute("id")); | |
| 105 ArrayList<Double> kms = new ArrayList<Double>(); | |
| 106 | |
| 107 NodeList lineNodes = csElement.getElementsByTagName("line"); | |
| 108 int numLines = lineNodes.getLength(); | |
| 109 for (int k = 0; k < numLines; k++) { | |
| 110 Element line = (Element) lineNodes.item(k); | |
| 111 double d = Double.parseDouble(line.getAttribute("km")); | |
| 112 kms.add(d); | |
| 113 } | |
| 114 | |
| 115 Double[] doubles = new Double[kms.size()]; | |
| 116 kms.toArray(doubles); | |
| 117 result.put(Integer.valueOf(idx), doubles); | |
| 118 } | |
| 119 } | |
| 120 catch(NumberFormatException nfe) { | |
| 121 logger.error("Response was not parsable"); | |
| 122 } | |
| 123 | |
| 124 return result; | |
| 125 } | |
| 126 catch (ConnectionException ce) { | |
| 127 logger.error("ConnectionExsp", ce); | |
| 128 } | |
| 129 | |
| 130 logger.warn("CrossSectionKMService.getCrossSectionKMS() - FAILED"); | |
| 131 throw new ServerException(ERROR_GET_CROSS_SECTION); | |
| 132 } | |
| 133 } | |
| 134 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |