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annotate flys-client/src/main/java/de/intevation/flys/client/server/ArtifactDescriptionFactory.java @ 16:f8a5f2c5e2b7

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The DESCRIBE document returned by the artifact server is parsed after calling create() of the artifact service and a new Artifact is created with an ArtifactDescription that contains the UUID, HASH, und the current Data. flys-client/trunk@1329 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 18 Feb 2011 14:23:12 +0000
parents
children a85bac235069
rev   line source
16
f8a5f2c5e2b7 The DESCRIBE document returned by the artifact server is parsed after calling create() of the artifact service and a new Artifact is created with an ArtifactDescription that contains the UUID, HASH, und the current Data.
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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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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.Node;
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10 import org.w3c.dom.NodeList;
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12 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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13 import de.intevation.artifacts.common.utils.ClientProtocolUtils;
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14 import de.intevation.artifacts.common.utils.XMLUtils;
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16 import de.intevation.flys.client.shared.model.ArtifactDescription;
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17 import de.intevation.flys.client.shared.model.Data;
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18 import de.intevation.flys.client.shared.model.DataItem;
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19 import de.intevation.flys.client.shared.model.DefaultData;
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20 import de.intevation.flys.client.shared.model.DefaultDataItem;
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21 import de.intevation.flys.client.shared.model.DefaultArtifactDescription;
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24 /**
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25 * This factory class helps creating an {@link ArtifactDescription} based on the
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26 * DESCRIBE document of an artifact returned by the artifact server. Use the
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27 * {@link createArtifactDescription(org.w3c.dom.Document)} method with the
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28 * DESCRIBE document to create such an {@link ArtifactDescription}.
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29 *
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30 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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31 */
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32 public class ArtifactDescriptionFactory {
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34 public static final String XPATH_STATE_NAME = "@art:name";
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35
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36 /**
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37 * This method creates the {@link ArtifactDescription} of the DESCRIBE
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38 * document <i>doc</i>.
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39 *
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40 * @param doc A DESCRIBE document.
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41 *
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42 * @return the {@link ArtifactDescription}.
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43 */
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44 public static ArtifactDescription createArtifactDescription(Document doc) {
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45 System.out.println("ArtifactDescriptionFactory - create()");
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47 Node currentState = ClientProtocolUtils.getCurrentState(doc);
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48 Node staticNode = ClientProtocolUtils.getStaticUI(doc);
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49 Node dynamicNode = ClientProtocolUtils.getDynamicUI(doc);
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51 String state = (String) XMLUtils.xpath(
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52 currentState,
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53 XPATH_STATE_NAME,
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54 XPathConstants.STRING,
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55 ArtifactNamespaceContext.INSTANCE);
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56 System.out.println("Current state name: " + state);
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57
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58 Data currentData = extractCurrentData(dynamicNode);
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59
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60 // TODO parse the static ui part
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61 return new DefaultArtifactDescription(null, currentData, state, null);
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62 }
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65 /**
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66 * This method extracts the data that the user is able to enter in the
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67 * current state of the artifact.
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68 *
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69 * @param dynamicNode The dynamic node of the DESCRIBE document.
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70 *
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71 * @return A {@link Data} object that represents the data which might be
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72 * entered by the user in the current state or null, if no data might be
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73 * entered.
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74 */
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75 protected static Data extractCurrentData(Node dynamicNode) {
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76 System.out.println("ArtifactDescriptionFactory - extractCurrentData()");
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77
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78 Node data = ClientProtocolUtils.getSelectNode(dynamicNode);
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79 NodeList choices = ClientProtocolUtils.getItemNodes(data);
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80 String label = ClientProtocolUtils.getLabel(data);
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81
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82 DataItem[] dataItems = extractCurrentDataItems(choices);
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83
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84 return new DefaultData(label, null, null, dataItems);
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85 }
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86
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87
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88 /**
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89 * This method extract the {@link DataItem}s of the DESCRIBE document.
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90 *
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91 * @param items The items in the DESCRIBE document.
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92 *
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93 * @return the {@link DataItem}s.
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94 */
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95 protected static DataItem[] extractCurrentDataItems(NodeList items) {
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96 System.out.println(
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97 "ArtifactDescriptionFactory - extractCurrentDataItems()");
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98
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99 if (items == null || items.getLength() == 0) {
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100 System.out.println("No data items found.");
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101 return null;
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102 }
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103
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104 int count = items.getLength();
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105
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106 List<DataItem> dataItems = new ArrayList<DataItem>(count);
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107
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108 for (int i = 0; i < count; i++) {
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109 Node item = items.item(i);
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110 String label = ClientProtocolUtils.getLabel(item);
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111 String value = ClientProtocolUtils.getValue(item);
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112
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113 dataItems.add(new DefaultDataItem(label, null, value));
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114 }
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115
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116 return (DataItem[]) dataItems.toArray(new DataItem[count]);
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117 }
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118 }
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119 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org