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annotate flys-client/src/main/java/de/intevation/flys/client/server/ArtifactDescriptionFactory.java @ 65:8f719fa1a691

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The output modes of an artifact are extracted from DESCRIBE document and put into the ArtifactDescription. flys-client/trunk@1547 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Wed, 23 Mar 2011 11:19:18 +0000
parents f983d5ce6402
children 27ffaf628b54
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.DataItem;
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18 import de.intevation.flys.client.shared.model.DataList;
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19 import de.intevation.flys.client.shared.model.DefaultArtifactDescription;
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20 import de.intevation.flys.client.shared.model.DefaultData;
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21 import de.intevation.flys.client.shared.model.DefaultDataItem;
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22 import de.intevation.flys.client.shared.model.DefaultOutputMode;
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23 import de.intevation.flys.client.shared.model.OutputMode;
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26 /**
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27 * This factory class helps creating an {@link ArtifactDescription} based on the
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28 * DESCRIBE document of an artifact returned by the artifact server. Use the
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29 * {@link createArtifactDescription(org.w3c.dom.Document)} method with the
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30 * DESCRIBE document to create such an {@link ArtifactDescription}.
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31 *
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32 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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33 */
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34 public class ArtifactDescriptionFactory {
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36 public static final String XPATH_STATE_NAME = "@art:name";
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38 public static final String XPATH_UIPROVIDER = "@art:uiprovider";
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40 public static final String XPATH_REACHABLE_STATE = "art:state";
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42 public static final String XPATH_STATIC_STATE_NODE = "art:state";
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44 public static final String XPATH_STATIC_DATA_NODE = "art:data";
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45
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46 public static final String XPATH_STATIC_ITEM_NODE = "art:item";
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48 /**
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49 * This method creates the {@link ArtifactDescription} of the DESCRIBE
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50 * document <i>doc</i>.
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51 *
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52 * @param doc A DESCRIBE document.
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53 *
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54 * @return the {@link ArtifactDescription}.
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55 */
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56 public static ArtifactDescription createArtifactDescription(Document doc) {
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57 System.out.println("ArtifactDescriptionFactory - create()");
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59 Node currentState = ClientProtocolUtils.getCurrentState(doc);
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60 Node staticNode = ClientProtocolUtils.getStaticUI(doc);
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61 Node dynamicNode = ClientProtocolUtils.getDynamicUI(doc);
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62 Node reachable = ClientProtocolUtils.getReachableStates(doc);
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63 NodeList outputs = ClientProtocolUtils.getOutputModes(doc);
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65 String state = (String) XMLUtils.xpath(
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66 currentState,
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67 XPATH_STATE_NAME,
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68 XPathConstants.STRING,
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69 ArtifactNamespaceContext.INSTANCE);
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70 System.out.println("Current state name: " + state);
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72 DataList currentData = extractCurrentData(dynamicNode, state);
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73 DataList[] old = extractOldData(staticNode);
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74 String[] states = extractReachableStates(reachable);
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75 OutputMode[] outs = extractOutputModes(outputs);
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77 return new DefaultArtifactDescription(
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78 old,
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79 currentData,
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80 state,
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81 states,
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82 outs);
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83 }
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85
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86 /**
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87 * This method extracts the data that the user is able to enter in the
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88 * current state of the artifact.
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89 *
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90 * @param dynamicNode The dynamic node of the DESCRIBE document.
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91 * @param state The name of the current state.
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92 *
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93 * @return A {@link Data} object that represents the data which might be
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94 * entered by the user in the current state or null, if no data might be
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95 * entered.
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96 */
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97 protected static DataList extractCurrentData(Node dynamicNode, String state) {
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98 System.out.println("ArtifactDescriptionFactory - extractCurrentData()");
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99
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100 NodeList data = ClientProtocolUtils.getSelectNode(dynamicNode);
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101 String uiProvider = extractUIProvider(dynamicNode);
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102
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103 if (data == null || data.getLength() == 0) {
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104 return null;
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105 }
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106
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107 int dataNum = data.getLength();
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108 DataList list = new DataList(state, dataNum, uiProvider);
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109
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110 for (int i = 0; i < dataNum; i++) {
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111 Node d = data.item(i);
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112
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113 NodeList choices = ClientProtocolUtils.getItemNodes(d);
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114 String label = ClientProtocolUtils.getLabel(d);
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115 String name = XMLUtils.xpathString(
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116 d, "@art:name", ArtifactNamespaceContext.INSTANCE);
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117
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118 DataItem[] dataItems = extractCurrentDataItems(choices);
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119
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120 list.add(new DefaultData(name, label, null, dataItems));
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121 }
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122
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123 return list;
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124 }
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125
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126
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127 /**
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128 * This method extract the {@link DataItem}s of the DESCRIBE document.
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129 *
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130 * @param items The items in the DESCRIBE document.
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131 *
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132 * @return the {@link DataItem}s.
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133 */
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134 protected static DataItem[] extractCurrentDataItems(NodeList items) {
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135 System.out.println(
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136 "ArtifactDescriptionFactory - extractCurrentDataItems()");
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137
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138 if (items == null || items.getLength() == 0) {
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139 System.out.println("No data items found.");
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140 return null;
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141 }
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142
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143 int count = items.getLength();
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144
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145 List<DataItem> dataItems = new ArrayList<DataItem>(count);
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146
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147 for (int i = 0; i < count; i++) {
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148 Node item = items.item(i);
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149 String label = ClientProtocolUtils.getLabel(item);
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150 String value = ClientProtocolUtils.getValue(item);
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151
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152 dataItems.add(new DefaultDataItem(label, null, value));
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153 }
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154
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155 return (DataItem[]) dataItems.toArray(new DataItem[count]);
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156 }
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157
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158
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159 /**
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160 * This method extracts the data objects from the data node of the static ui
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161 * part of the DESCRIBE document.
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162 *
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163 * @param staticNode The static ui node of the DESCRIBE.
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164 *
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165 * @return the DataList objects.
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166 */
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167 protected static DataList[] extractOldData(Node staticNode) {
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168 System.out.println("ArtifactDescriptionFactory - extractOldData()");
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169
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170 NodeList stateNodes = (NodeList) XMLUtils.xpath(
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171 staticNode,
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172 XPATH_STATIC_STATE_NODE,
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173 XPathConstants.NODESET,
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174 ArtifactNamespaceContext.INSTANCE);
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175
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176 if (stateNodes == null || stateNodes.getLength() == 0) {
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177 System.out.println("No old items found.");
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178 return null;
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179 }
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180
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181 int count = stateNodes.getLength();
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182 DataList[] data = new DataList[count];
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183
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184 for (int i = 0; i < count; i++) {
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185 Node tmp = stateNodes.item(i);
34
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186
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187 String name = XMLUtils.xpathString(
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188 tmp, "@art:name", ArtifactNamespaceContext.INSTANCE);
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189 String uiprovider = XMLUtils.xpathString(
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190 tmp, "@art:uiprovider", ArtifactNamespaceContext.INSTANCE);
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191 String label = XMLUtils.xpathString(
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192 tmp, "@art:label", ArtifactNamespaceContext.INSTANCE);
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193
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194 NodeList dataNodes = (NodeList) XMLUtils.xpath(
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195 tmp,
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196 XPATH_STATIC_DATA_NODE,
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197 XPathConstants.NODESET,
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198 ArtifactNamespaceContext.INSTANCE);
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199
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200 if (dataNodes == null || dataNodes.getLength() == 0) {
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201 continue;
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202 }
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203
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204 int size = dataNodes.getLength();
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205 DataList list = new DataList(name, size, uiprovider, label);
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206
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207 for (int j = 0; j < size; j++) {
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208 Node dataNode = dataNodes.item(j);
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209
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210 String dName = XMLUtils.xpathString(
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211 dataNode, "@art:name", ArtifactNamespaceContext.INSTANCE);
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212 String dType = XMLUtils.xpathString(
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213 dataNode, "@art:type", ArtifactNamespaceContext.INSTANCE);
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214
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215 DataItem[] items = extractOldDataItems(dataNode);
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216
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217 list.add(new DefaultData(dName, dName, dType, items));
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218
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219 data[i] = list;
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220 }
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221 }
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222
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223 return data;
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224 }
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225
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226
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227 /**
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228 * This method extracts the data items from the data nodes that are placed
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229 * in the static ui part of the DESCRIBE document.
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230 *
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231 * @param dataNode A data node that contains items.
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232 *
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233 * @return a list of DataItems.
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234 */
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235 protected static DataItem[] extractOldDataItems(Node dataNode) {
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236 NodeList itemList = (NodeList) XMLUtils.xpath(
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237 dataNode,
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238 XPATH_STATIC_ITEM_NODE,
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239 XPathConstants.NODESET,
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240 ArtifactNamespaceContext.INSTANCE);
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241
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242 if (itemList == null || itemList.getLength() == 0) {
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243 System.out.println("No old data items found.");
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244 return null;
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245 }
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246
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247 int count = itemList.getLength();
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248
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249 DataItem[] items = new DataItem[count];
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250
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251 for (int i = 0; i < count; i++) {
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252 Node tmp = itemList.item(i);
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253
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254 String value = XMLUtils.xpathString(
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255 tmp, "@art:value", ArtifactNamespaceContext.INSTANCE);
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f983d5ce6402 Display human readable strings of the selected values in the UI.
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256 String label = XMLUtils.xpathString(
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257 tmp, "@art:label", ArtifactNamespaceContext.INSTANCE);
34
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258
61
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259 items[i] = new DefaultDataItem(label, label, value);
34
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260 }
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261
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262 return items;
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263 }
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264
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265
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266 /**
22
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267 * This method extracts the UIProvider specified by the data node.
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268 *
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269 * @param data The data node.
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270 *
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271 * @return the UIProvider that is specified in the data node.
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272 */
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273 protected static String extractUIProvider(Node ui) {
22
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274 return (String) XMLUtils.xpath(
51
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275 ui,
22
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276 XPATH_UIPROVIDER,
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277 XPathConstants.STRING,
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278 ArtifactNamespaceContext.INSTANCE);
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279 }
32
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280
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281
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282 /**
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283 * This method extracts the reachable states of the current artifact.
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284 *
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285 * @param reachable The reachable states node.
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286 *
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287 * @return an array with identifiers of reachable states.
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288 */
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289 protected static String[] extractReachableStates(Node reachable) {
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290 System.out.println("ArtifactDescriptionFactory - extractReachableStates()");
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291
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292 NodeList list = (NodeList) XMLUtils.xpath(
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293 reachable,
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294 XPATH_REACHABLE_STATE,
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295 XPathConstants.NODESET,
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296 ArtifactNamespaceContext.INSTANCE);
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297
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298 if (list == null || list.getLength() == 0) {
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299 return null;
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300 }
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301
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302 int count = list.getLength();
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303
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diff changeset
304 String[] states = new String[count];
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305
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diff changeset
306 for (int i = 0; i < count; i++) {
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307 Node state = list.item(i);
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308
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309 String name = XMLUtils.xpathString(
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310 state, "@art:name", ArtifactNamespaceContext.INSTANCE);
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311
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312 states[i] = name;
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313 }
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314
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315 return states;
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316 }
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317
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318
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319 /**
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320 * This method extract available output modes of the the current artifact.
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321 *
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322 * @param outputs A list of nodes that contain information about output
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323 * modes.
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324 *
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325 * @return an array of Output modes.
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326 */
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327 protected static OutputMode[] extractOutputModes(NodeList outputs) {
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328 System.out.println("ArtifactDescriptionFactory - extractOutputModes()");
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329
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330 if (outputs == null || outputs.getLength() == 0) {
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331 return null;
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332 }
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333
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334 int size = outputs.getLength();
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335
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336 List<OutputMode> outs = new ArrayList<OutputMode>(size);
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337
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338 for (int i = 0; i < size; i++) {
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339 Node out = outputs.item(i);
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340
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341 String name = XMLUtils.xpathString(
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342 out, "@art:name", ArtifactNamespaceContext.INSTANCE);
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343 String desc = XMLUtils.xpathString(
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344 out, "@art:description", ArtifactNamespaceContext.INSTANCE);
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345 String mimeType = XMLUtils.xpathString(
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346 out, "@art:mime-type", ArtifactNamespaceContext.INSTANCE);
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347
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348 if (name != null) {
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349 outs.add(new DefaultOutputMode(name, desc, mimeType));
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350 }
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351 else {
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352 System.err.println("Found an invalid output mode.");
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353 }
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354 }
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355
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356 return (OutputMode[]) outs.toArray(new OutputMode[size]);
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357 }
16
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358 }
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359 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org