annotate flys-client/src/main/java/de/intevation/flys/client/server/RiverServiceImpl.java @ 1380:2d617c48ca5f

Issue 400. Iterate over a list of all theme settings to display all available settings. flys-client/trunk@3132 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Raimund Renkert <raimund.renkert@intevation.de>
date Tue, 01 Nov 2011 15:01:37 +0000
parents ab8eb2f544f2
children bc06a671ef60
rev   line source
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1 package de.intevation.flys.client.server;
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2
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3 import java.util.ArrayList;
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4 import java.util.List;
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5
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6 import javax.xml.xpath.XPathConstants;
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8 import org.w3c.dom.Document;
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9 import org.w3c.dom.NodeList;
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10 import org.w3c.dom.Node;
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11
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12 import org.apache.log4j.Logger;
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14 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
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16 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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17 import de.intevation.artifacts.common.utils.XMLUtils;
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19 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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20 import de.intevation.artifacts.httpclient.http.HttpClient;
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21 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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23 import de.intevation.flys.client.shared.exceptions.ServerException;
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24 import de.intevation.flys.client.shared.model.DefaultRiver;
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25 import de.intevation.flys.client.shared.model.River;
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26 import de.intevation.flys.client.client.services.RiverService;
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29 /**
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30 * This interface provides a method to list the supported rivers of the artifact
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31 * server.
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32 *
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33 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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34 */
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35 public class RiverServiceImpl
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36 extends RemoteServiceServlet
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37 implements RiverService
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38 {
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39 private static final Logger logger =
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40 Logger.getLogger(RiverServiceImpl.class);
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43 /** The XPath string that points to the rivers in the resulting document.*/
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44 public static final String XPATH_RIVERS = "/art:rivers/art:river";
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46 /** The error message key that is thrown if an error occured while reading
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47 * the supported rivers from server.*/
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48 public static final String ERROR_NO_RIVERS_FOUND = "error_no_rivers_found";
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51 public River[] list(String serverUrl, String locale)
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52 throws ServerException
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53 {
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54 Document doc = XMLUtils.newDocument();
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56 XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
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57 doc,
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58 ArtifactNamespaceContext.NAMESPACE_URI,
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59 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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60
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61 doc.appendChild(ec.create("action"));
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62
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63 HttpClient client = new HttpClientImpl(serverUrl, locale);
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65 try {
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66 Document res = client.callService(serverUrl, "rivers", doc);
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68 NodeList rivers = (NodeList) XMLUtils.xpath(
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69 res,
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70 XPATH_RIVERS,
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71 XPathConstants.NODESET,
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72 ArtifactNamespaceContext.INSTANCE);
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74 if (rivers == null || rivers.getLength() == 0) {
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75 throw new ServerException(ERROR_NO_RIVERS_FOUND);
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76 }
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78 int count = rivers.getLength();
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80 List<River> theRivers = new ArrayList<River>(count);
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81
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82 for (int i = 0; i < count; i++) {
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83 Node tmp = rivers.item(i);
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84
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85 String name = XMLUtils.xpathString(
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86 tmp, "@art:name", ArtifactNamespaceContext.INSTANCE);
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87
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88 theRivers.add(new DefaultRiver(name));
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89 }
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90
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91 return (River[]) theRivers.toArray(new River[count]);
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92 }
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93 catch (ConnectionException ce) {
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94 logger.error(ce, ce);
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95 }
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96
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97 throw new ServerException(ERROR_NO_RIVERS_FOUND);
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98 }
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99 }
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100 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :

http://dive4elements.wald.intevation.org