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annotate flys-client/src/main/java/de/intevation/flys/client/server/ArtifactDescriptionFactory.java @ 22:a85bac235069

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Implemented code to parse the UIProvider that should be used for a current state. flys-client/trunk@1336 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 22 Feb 2011 17:29:51 +0000
parents f8a5f2c5e2b7
children 88c530c25968
rev   line source
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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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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 public static final String XPATH_UIPROVIDER = "@art:uiprovider";
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38 /**
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39 * This method creates the {@link ArtifactDescription} of the DESCRIBE
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40 * document <i>doc</i>.
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41 *
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42 * @param doc A DESCRIBE document.
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43 *
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44 * @return the {@link ArtifactDescription}.
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45 */
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46 public static ArtifactDescription createArtifactDescription(Document doc) {
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47 System.out.println("ArtifactDescriptionFactory - create()");
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48
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49 Node currentState = ClientProtocolUtils.getCurrentState(doc);
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50 Node staticNode = ClientProtocolUtils.getStaticUI(doc);
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51 Node dynamicNode = ClientProtocolUtils.getDynamicUI(doc);
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53 String state = (String) XMLUtils.xpath(
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54 currentState,
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55 XPATH_STATE_NAME,
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56 XPathConstants.STRING,
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57 ArtifactNamespaceContext.INSTANCE);
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58 System.out.println("Current state name: " + state);
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59
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60 Data currentData = extractCurrentData(dynamicNode);
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62 // TODO parse the static ui part
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63 return new DefaultArtifactDescription(null, currentData, state, null);
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64 }
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67 /**
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68 * This method extracts the data that the user is able to enter in the
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69 * current state of the artifact.
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70 *
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71 * @param dynamicNode The dynamic node of the DESCRIBE document.
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72 *
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73 * @return A {@link Data} object that represents the data which might be
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74 * entered by the user in the current state or null, if no data might be
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75 * entered.
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76 */
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77 protected static Data extractCurrentData(Node dynamicNode) {
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78 System.out.println("ArtifactDescriptionFactory - extractCurrentData()");
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79
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80 Node data = ClientProtocolUtils.getSelectNode(dynamicNode);
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81 NodeList choices = ClientProtocolUtils.getItemNodes(data);
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82 String label = ClientProtocolUtils.getLabel(data);
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83
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84 DataItem[] dataItems = extractCurrentDataItems(choices);
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85 String uiProvider = extractUIProvider(data);
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86
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87 return new DefaultData(label, null, null, dataItems, uiProvider);
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88 }
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89
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90
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91 /**
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92 * This method extract the {@link DataItem}s of the DESCRIBE document.
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93 *
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94 * @param items The items in the DESCRIBE document.
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95 *
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96 * @return the {@link DataItem}s.
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97 */
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98 protected static DataItem[] extractCurrentDataItems(NodeList items) {
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99 System.out.println(
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100 "ArtifactDescriptionFactory - extractCurrentDataItems()");
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101
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102 if (items == null || items.getLength() == 0) {
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103 System.out.println("No data items found.");
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104 return null;
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105 }
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106
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107 int count = items.getLength();
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108
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109 List<DataItem> dataItems = new ArrayList<DataItem>(count);
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110
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111 for (int i = 0; i < count; i++) {
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112 Node item = items.item(i);
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113 String label = ClientProtocolUtils.getLabel(item);
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114 String value = ClientProtocolUtils.getValue(item);
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115
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116 dataItems.add(new DefaultDataItem(label, null, value));
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117 }
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118
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119 return (DataItem[]) dataItems.toArray(new DataItem[count]);
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120 }
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121
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122
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123 /**
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124 * This method extracts the UIProvider specified by the data node.
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125 *
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126 * @param data The data node.
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127 *
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128 * @return the UIProvider that is specified in the data node.
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129 */
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130 protected static String extractUIProvider(Node data) {
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131 return (String) XMLUtils.xpath(
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132 data,
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133 XPATH_UIPROVIDER,
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134 XPathConstants.STRING,
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135 ArtifactNamespaceContext.INSTANCE);
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136 }
16
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137 }
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138 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org