Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/UserCollectionsServiceImpl.java @ 581:210339fd1a34

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Removed more expensive XPath. flys-client/trunk@2169 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 20 Jun 2011 16:25:48 +0000
parents 924da6695800
children 53ad6dd2cb2b
rev   line source
96
261a2ee7d9bb Added a service that returns the collections of a specified user.
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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.Date;
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5 import java.util.List;
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6
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7 import javax.xml.xpath.XPathConstants;
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8
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9 import org.w3c.dom.Document;
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10 import org.w3c.dom.Node;
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11 import org.w3c.dom.NodeList;
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12
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13 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
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14
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15 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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16 import de.intevation.artifacts.common.utils.XMLUtils;
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17
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18 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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19 import de.intevation.artifacts.httpclient.http.HttpClient;
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20 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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21
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22 import de.intevation.flys.client.shared.model.Collection;
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23 import de.intevation.flys.client.shared.model.DefaultCollection;
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24 import de.intevation.flys.client.client.services.UserCollectionsService;
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25
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26
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27 /**
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28 * This service returns a list of collections owned by a specified user.
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29 * <b>NOTE:</b> The Collections returned by this service provide no information
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30 * about the CollectionItems or OutputModes of the Collection. You need to fetch
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31 * these information explicitly using another service.
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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 UserCollectionsServiceImpl
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36 extends RemoteServiceServlet
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37 implements UserCollectionsService
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38 {
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39 public Collection[] getUserCollections(
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40 String serverUrl,
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41 String locale,
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42 String userid)
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43 {
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44 System.out.println("UserCollectionsServiceImpl.getUserCollections");
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45
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46 HttpClient client = new HttpClientImpl(serverUrl, locale);
96
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47
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48 try {
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49 Document result = client.listUserCollections(userid);
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50
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51 NodeList list = (NodeList) XMLUtils.xpath(
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52 result,
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53 "/art:artifact-collections/art:artifact-collection",
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54 XPathConstants.NODESET,
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55 ArtifactNamespaceContext.INSTANCE);
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56
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57 if (list == null || list.getLength() == 0) {
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58 System.out.println("No collection found for user: " + userid);
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59 return null;
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60 }
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61
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62 int num = list.getLength();
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63
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64 List<Collection> all = new ArrayList<Collection>(num);
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65
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66 for (int i = 0; i < num; i++) {
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67 Collection c = createCollection(list.item(i));
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68
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69 if (c != null) {
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70 all.add(c);
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71 }
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72 }
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73
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74 System.out.println("User has " + all.size() + " collections.");
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75
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76 return (Collection[]) all.toArray(new Collection[all.size()]);
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77 }
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78 catch (ConnectionException ce) {
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79 System.err.println(ce.getLocalizedMessage());
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80 }
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81
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82 System.err.println("No user collections found.");
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83 return null;
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84 }
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85
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86
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87 /**
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88 * Extracts a SimpleCollection from <i>node</i>.
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89 *
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90 * @param node Contains information about a collection.
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91 *
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92 * @return a list of Simplecollections.
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93 */
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94 protected Collection createCollection(Node node) {
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95 String creationStr = XMLUtils.xpathString(
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96 node, "@art:creation", ArtifactNamespaceContext.INSTANCE);
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97
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98 String name = XMLUtils.xpathString(
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99 node, "@art:name", ArtifactNamespaceContext.INSTANCE);
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100
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101 String uuid = XMLUtils.xpathString(
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102 node, "@art:uuid", ArtifactNamespaceContext.INSTANCE);
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103
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104 if (uuid != null) {
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105 long time = Long.parseLong(creationStr);
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106 return new DefaultCollection(uuid, name, new Date(time));
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107 }
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108
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109 System.err.println("Found an invalid Collection.");
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110 return null;
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111 }
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112 }
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113 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org