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annotate flys-client/src/main/java/de/intevation/flys/client/server/AddArtifactServiceImpl.java @ 95:e2abb6b9dc7e

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A collection provides a method to retrieve its creation time now. flys-client/trunk@1608 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 29 Mar 2011 13:44:53 +0000
parents c8cd1b918901
children 5c3d685546a6
rev   line source
69
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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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5
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6 import javax.xml.xpath.XPathConstants;
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7
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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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11
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12 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
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13
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14 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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15 import de.intevation.artifacts.common.utils.ClientProtocolUtils;
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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 import de.intevation.artifacts.httpclient.http.response.DocumentResponseHandler;
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22
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23 import de.intevation.flys.client.shared.model.Artifact;
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24 import de.intevation.flys.client.shared.model.Collection;
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25 import de.intevation.flys.client.shared.model.CollectionItem;
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26 import de.intevation.flys.client.shared.model.DefaultCollection;
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27 import de.intevation.flys.client.shared.model.DefaultCollectionItem;
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28 import de.intevation.flys.client.shared.model.DefaultOutputMode;
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29 import de.intevation.flys.client.shared.model.OutputMode;
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30 import de.intevation.flys.client.client.services.AddArtifactService;
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31
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32
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33 /**
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34 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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35 */
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36 public class AddArtifactServiceImpl
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37 extends RemoteServiceServlet
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38 implements AddArtifactService
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39 {
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40 public Collection add(Collection collection, Artifact artifact, String url) {
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41 System.out.println("AddArtifactServiceImpl - add()");
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42
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43 Document add = ClientProtocolUtils.newAddArtifactDocument(
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44 artifact.getUuid(), null);
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45
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46 HttpClient client = new HttpClientImpl(url);
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47
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48 try {
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49 Document response = (Document) client.doCollectionAction(
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50 add, collection.identifier(), new DocumentResponseHandler());
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51
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52 Collection c = parseCollection(response);
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53
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54 if (c == null) {
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55 throw new NullPointerException("No collection returned.");
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56 }
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57
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58 return c;
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59 }
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60 catch (ConnectionException ce) {
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61 System.err.println(ce.getLocalizedMessage());
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62 }
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63
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64 return null;
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65 }
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66
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67
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68 /**
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69 * This method takes the DESCRIBE document of the Collections describe()
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70 * operation and extracts the information about the collection itself and
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71 * the collection items.
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72 *
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73 * @param description The DESCRIBE document of the Collections describe()
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74 * operation.
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75 *
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76 * @return a Collection with CollectionItems.
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77 */
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78 protected Collection parseCollection(Document description) {
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79 System.out.println("AddArtifactServiceImpl.parseCollection");
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80
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81 if (description == null) {
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82 System.err.println("The DESCRIBE of the Collection is null!");
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83 return null;
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84 }
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85
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86 String uuid = XMLUtils.xpathString(
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87 description,
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88 "art:artifact-collection/@art:uuid",
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89 ArtifactNamespaceContext.INSTANCE);
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90
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91 if (uuid == null || uuid.equals("")) {
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92 System.err.println("Found an invalid Collection!");
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93 return null;
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94 }
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95
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96 Collection c = new DefaultCollection(uuid);
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97
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98 NodeList items = (NodeList) XMLUtils.xpath(
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99 description,
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100 "art:artifact-collection/art:artifacts/art:artifact",
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101 XPathConstants.NODESET,
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102 ArtifactNamespaceContext.INSTANCE);
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103
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104 if (items == null || items.getLength() == 0) {
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105 System.out.println("No collection item found for this collection.");
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106
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107 return c;
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108 }
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109
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110 int size = items.getLength();
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111
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112 for (int i = 0; i < size; i++) {
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113 CollectionItem item = parseCollectionItem(items.item(i));
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114
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115 if (item != null) {
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116 c.addItem(item);
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117 }
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118 }
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119
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120 System.out.println(
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121 "Found " + c.getItemLength() + " collection items " +
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122 "for the Collection '" + c.identifier() + "'.");
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123
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124 return c;
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125 }
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126
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127
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128 /**
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129 * This method extracts the CollectionItem from <i>node</i> with its output
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130 * modes. The output modes are parsed using the parseOutputModes() method.
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131 *
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132 * @param node A node that contains information about a CollectionItem.
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133 *
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134 * @return a CollectionItem.
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135 */
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136 protected CollectionItem parseCollectionItem(Node node) {
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137 System.out.println("AddArtifactServiceImpl.parseCollectionItem");
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138
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139 if (node == null) {
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140 System.err.println("The node for parsing CollectionItem is null!");
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141 return null;
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142 }
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143
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144 String uuid = XMLUtils.xpathString(
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145 node, "@art:uuid", ArtifactNamespaceContext.INSTANCE);
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146
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147 String hash = XMLUtils.xpathString(
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148 node, "@art:hash", ArtifactNamespaceContext.INSTANCE);
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149
69
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150 if (uuid == null || uuid.equals("")) {
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151 System.err.println("Found an invalid CollectionItem!");
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152 }
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153
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154 Node outputmodes = (Node) XMLUtils.xpath(
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155 node,
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156 "art:outputmodes",
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157 XPathConstants.NODE,
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158 ArtifactNamespaceContext.INSTANCE);
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159
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160 List<OutputMode> modes = parseOutputModes(outputmodes);
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161
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162 return new DefaultCollectionItem(uuid, hash, modes);
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163 }
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164
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165
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166 /**
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167 * This method extracts the OutputModes available for a specific
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168 * CollectionItem and returns them as list.
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169 *
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170 * @param node The root node of the outputmodes list.
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171 *
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172 * @return a list of OutputModes.
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173 */
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174 protected List<OutputMode> parseOutputModes(Node node) {
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175 System.out.println("AddArtifactServiceImpl.parseOutputModes");
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176
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177 if (node == null) {
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178 System.err.println("The node for parsing OutputModes is null!");
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179 return null;
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180 }
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181
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182 NodeList list = (NodeList) XMLUtils.xpath(
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183 node,
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184 "art:output",
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185 XPathConstants.NODESET,
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186 ArtifactNamespaceContext.INSTANCE);
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187
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188 if (list == null || list.getLength() == 0) {
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189 System.err.println("No outputmode nodes found!");
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190 return null;
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191 }
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192
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193 int size = list.getLength();
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194
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195 List<OutputMode> modes = new ArrayList<OutputMode>(size);
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196
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197 for (int i = 0; i < size; i++) {
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198 Node tmp = list.item(i);
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199 String name = XMLUtils.xpathString(
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200 tmp, "@art:name", ArtifactNamespaceContext.INSTANCE);
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201 String desc = XMLUtils.xpathString(
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202 tmp, "@art:description", ArtifactNamespaceContext.INSTANCE);
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203 String mime = XMLUtils.xpathString(
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204 tmp, "@art:mime-type", ArtifactNamespaceContext.INSTANCE);
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205
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206 if (name == null || name.equals("")) {
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207 System.err.println("Found an invalid output mode.");
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208
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209 continue;
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210 }
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211
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212 // TODO Parse Facets
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213
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214 modes.add(new DefaultOutputMode(name, desc, mime));
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215 }
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216
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217 return modes;
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218 }
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219 }
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220 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org