annotate flys-client/src/main/java/de/intevation/flys/client/server/ArtifactDescriptionFactory.java @ 32:88c530c25968

Added a service for the ADVANCE operation and a service that bundles FEED and ADVANCE in a single service. flys-client/trunk@1451 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 10 Mar 2011 10:53:41 +0000
parents a85bac235069
children bf84bcd4e11b
rev   line source
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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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37
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38 public static final String XPATH_REACHABLE_STATE = "art:state";
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39
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40 /**
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41 * This method creates the {@link ArtifactDescription} of the DESCRIBE
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42 * document <i>doc</i>.
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43 *
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44 * @param doc A DESCRIBE document.
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45 *
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46 * @return the {@link ArtifactDescription}.
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47 */
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48 public static ArtifactDescription createArtifactDescription(Document doc) {
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49 System.out.println("ArtifactDescriptionFactory - create()");
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50
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51 Node currentState = ClientProtocolUtils.getCurrentState(doc);
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52 Node staticNode = ClientProtocolUtils.getStaticUI(doc);
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53 Node dynamicNode = ClientProtocolUtils.getDynamicUI(doc);
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54 Node reachable = ClientProtocolUtils.getReachableStates(doc);
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56 String state = (String) XMLUtils.xpath(
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57 currentState,
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58 XPATH_STATE_NAME,
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59 XPathConstants.STRING,
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60 ArtifactNamespaceContext.INSTANCE);
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61 System.out.println("Current state name: " + state);
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62
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63 Data currentData = extractCurrentData(dynamicNode);
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64 String[] states = extractReachableStates(reachable);
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66 // TODO parse the static ui part
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67 return new DefaultArtifactDescription(null, currentData, state, states);
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68 }
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71 /**
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72 * This method extracts the data that the user is able to enter in the
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73 * current state of the artifact.
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74 *
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75 * @param dynamicNode The dynamic node of the DESCRIBE document.
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76 *
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77 * @return A {@link Data} object that represents the data which might be
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78 * entered by the user in the current state or null, if no data might be
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79 * entered.
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80 */
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81 protected static Data extractCurrentData(Node dynamicNode) {
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82 System.out.println("ArtifactDescriptionFactory - extractCurrentData()");
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83
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84 Node data = ClientProtocolUtils.getSelectNode(dynamicNode);
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85 NodeList choices = ClientProtocolUtils.getItemNodes(data);
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86 String label = ClientProtocolUtils.getLabel(data);
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87
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88 DataItem[] dataItems = extractCurrentDataItems(choices);
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89 String uiProvider = extractUIProvider(data);
16
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90
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91 return new DefaultData(label, null, null, dataItems, uiProvider);
16
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92 }
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93
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94
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95 /**
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96 * This method extract the {@link DataItem}s of the DESCRIBE document.
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97 *
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98 * @param items The items in the DESCRIBE document.
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99 *
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100 * @return the {@link DataItem}s.
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101 */
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102 protected static DataItem[] extractCurrentDataItems(NodeList items) {
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103 System.out.println(
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104 "ArtifactDescriptionFactory - extractCurrentDataItems()");
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105
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106 if (items == null || items.getLength() == 0) {
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107 System.out.println("No data items found.");
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108 return null;
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109 }
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110
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111 int count = items.getLength();
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112
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113 List<DataItem> dataItems = new ArrayList<DataItem>(count);
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114
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115 for (int i = 0; i < count; i++) {
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116 Node item = items.item(i);
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117 String label = ClientProtocolUtils.getLabel(item);
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118 String value = ClientProtocolUtils.getValue(item);
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119
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120 dataItems.add(new DefaultDataItem(label, null, value));
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121 }
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122
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123 return (DataItem[]) dataItems.toArray(new DataItem[count]);
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124 }
22
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125
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126
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127 /**
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128 * This method extracts the UIProvider specified by the data node.
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129 *
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130 * @param data The data node.
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131 *
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132 * @return the UIProvider that is specified in the data node.
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133 */
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134 protected static String extractUIProvider(Node data) {
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135 return (String) XMLUtils.xpath(
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136 data,
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137 XPATH_UIPROVIDER,
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138 XPathConstants.STRING,
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139 ArtifactNamespaceContext.INSTANCE);
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140 }
32
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141
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142
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143 /**
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144 * This method extracts the reachable states of the current artifact.
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145 *
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146 * @param reachable The reachable states node.
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147 *
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148 * @return an array with identifiers of reachable states.
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149 */
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150 protected static String[] extractReachableStates(Node reachable) {
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151 System.out.println("ArtifactDescriptionFactory - extractReachableStates()");
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152
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153 NodeList list = (NodeList) XMLUtils.xpath(
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154 reachable,
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155 XPATH_REACHABLE_STATE,
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156 XPathConstants.NODESET,
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157 ArtifactNamespaceContext.INSTANCE);
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158
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159 if (list == null || list.getLength() == 0) {
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160 return null;
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161 }
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162
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163 int count = list.getLength();
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164
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165 String[] states = new String[count];
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166
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167 for (int i = 0; i < count; i++) {
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168 Node state = list.item(i);
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169
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170 String name = XMLUtils.xpathString(
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171 state, "@art:name", ArtifactNamespaceContext.INSTANCE);
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172
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173 states[i] = name;
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174 }
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175
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176 return states;
88c530c25968 Added a service for the ADVANCE operation and a service that bundles FEED and ADVANCE in a single service.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 22
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177 }
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.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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178 }
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.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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179 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :

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