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annotate artifact-database/src/main/java/de/intevation/artifactdatabase/rest/CollectionResource.java @ 310:63122b9dee1d

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Added interface to listen events in the backend. artifacts/trunk@2435 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 01 Aug 2011 09:41:40 +0000
parents e92d5944fe4b
children
rev   line source
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1 /*
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2 * Copyright (c) 2011 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8 package de.intevation.artifactdatabase.rest;
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9
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10 import de.intevation.artifacts.ArtifactDatabase;
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11 import de.intevation.artifacts.ArtifactDatabaseException;
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12 import de.intevation.artifacts.CallMeta;
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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.XMLUtils;
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16
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17 import de.intevation.artifactdatabase.ArtifactDatabaseImpl;
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18
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19 import java.io.IOException;
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20
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21 import javax.xml.xpath.XPathConstants;
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22
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23 import org.apache.log4j.Logger;
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24
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25 import org.restlet.data.MediaType;
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26 import org.restlet.data.Status;
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27 import org.restlet.ext.xml.DomRepresentation;
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28 import org.restlet.representation.EmptyRepresentation;
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29 import org.restlet.representation.Representation;
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30 import org.restlet.Request;
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31 import org.restlet.Response;
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32
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33 import org.w3c.dom.Document;
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34 import org.w3c.dom.Node;
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35
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36
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37 /**
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38 * @author <a href="mailto:ingo.weinzierl@intevation">Ingo Weinzierl</a>
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39 */
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40 public class CollectionResource
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41 extends BaseResource
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42 {
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43 /** The logger that is used in this class.*/
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44 private static Logger logger = Logger.getLogger(CollectionResource.class);
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45
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46 /** server URL where to reach the resource.*/
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47 public static final String PATH = "/collection/{uuid}";
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48
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49 /**
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50 * XPath to figure out the type of action (feed, advance) via the
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51 * incoming POST request.
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52 */
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53 public static final String XPATH_ACTION = "/art:action/art:type/@name";
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54
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55 /**
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56 * XPath to figure out the identifier of the artifact described in the
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57 * action.
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58 */
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59 public static final String XPATH_ARTIFACT =
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60 "/art:action/art:type/art:artifact/@uuid";
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61
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62 /** Error message if no action was given.*/
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63 public static final String NO_ACTION_MSG = "no action given";
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64
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65 /** Error message if a unknown action was given.*/
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66 public static final String NO_SUCH_ACTION_MSG = "no such action";
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67
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68 /** Action name for deleting a collection.*/
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69 public static final String ACTION_DELETE = "delete";
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70
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71 /** Action name for describing the collection.*/
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72 public static final String ACTION_DESCRIBE = "describe";
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73
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74 /** Action name for retrieving the attribute of a collection.*/
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75 public static final String ACTION_GET_ATTRIBUTE = "getattribute";
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77 /** Action name for retrieving the attributes of an artifact stored in the
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78 * collection.*/
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79 public static final String ACTION_GET_ITEM_ATTRIBUTE = "getitemattribute";
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80
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81 /** Action name for setting the attribute of a collection.*/
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82 public static final String ACTION_SET_ATTRIBUTE = "setattribute";
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83
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84 /** Action name for setting the attribute for an artifact stored in the
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85 * collection.*/
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86 public static final String ACTION_SET_ITEM_ATTRIBUTE = "setitemattribute";
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87
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88 /** Action name for adding a new artifact to the collection.*/
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89 public static final String ACTION_ADD_ARTIFACT = "addartifact";
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90
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91 /** Action name for removing an artifact from the collection.*/
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92 public static final String ACTION_REMOVE_ARTIFACT = "removeartifact";
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93
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94 /** Action name for listing the artifacts of the collection.*/
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95 public static final String ACTION_LIST_ARTIFACTS = "listartifacts";
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97 /** Action name for setting the ttl of a collection.*/
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98 public static final String ACTION_SET_TTL = "settimetolive";
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99
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100 /** Action name for setting the name of a collection.*/
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101 public static final String ACTION_SET_NAME = "setname";
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103
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104 /**
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105 * Method to figure out which POST action was triggered and perform this
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106 * operation on the collection specified by 'identifier' and found in the
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107 * artifact database 'db'.
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108 *
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109 * @param identifier The identifier of the collection.
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110 * @param action The action to be performed.
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111 * @param source The input document to further parameterize the operation.
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112 * @param db The artifact database where to find the collection.
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113 *
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114 * @return The representation produced by the performed action.
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115 */
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116 protected Representation dispatch(
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117 String identifier,
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118 String action,
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119 Document source,
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120 ArtifactDatabase db
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121 ) {
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122 Document out = null;
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123
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124 try {
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125 CallMeta meta = getCallMeta();
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126
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127 if (action.equals(ACTION_DELETE)) {
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128 logger.info("Delete collection '" + identifier + "'");
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129 out = db.deleteCollection(identifier, getCallMeta());
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130 }
196
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131 else if (action.equals(ACTION_DESCRIBE)) {
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132 logger.info("Describe collection '" + identifier + "'");
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133
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134 out = db.describeCollection(identifier, meta);
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135 }
142
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136 else if (action.equals(ACTION_ADD_ARTIFACT)) {
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137 String art = getArtifactIdentifier(source);
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138
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139 logger.info("Add artifact '" + art + "' to collection.");
189
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140 out = db.addCollectionArtifact(identifier, art, source, meta);
142
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141 }
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142 else if (action.equals(ACTION_REMOVE_ARTIFACT)) {
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143 String art = getArtifactIdentifier(source);
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144
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145 logger.info("Remove artifact '" + art + "' from collection.");
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146 out = db.removeCollectionArtifact(identifier, art, meta);
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147 }
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148 else if (action.equals(ACTION_LIST_ARTIFACTS)) {
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149 logger.info("List artifacts of collection '" + identifier +"'");
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150 out = db.listCollectionArtifacts(identifier, meta);
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151 }
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152 else if (action.equals(ACTION_SET_ATTRIBUTE)) {
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153 String art = getArtifactIdentifier(source);
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154
253
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155 logger.info("Set attribute for collection '" + identifier + "'");
268
4edaf3073109 Repaired the setting of a new attribute for a Collection.
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156
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157 Document attr = getCollectionAttribute(source);
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158
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159 out = db.setCollectionAttribute(identifier, meta, attr);
253
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160 }
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161 else if (action.equals(ACTION_SET_ITEM_ATTRIBUTE)) {
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162 String art = getArtifactIdentifier(source);
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163
142
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164 logger.info("Set attribute for artifact '" + art + "'");
252
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165 out = db.setCollectionItemAttribute(identifier, art, source, meta);
142
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166 }
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167 else if (action.equals(ACTION_GET_ATTRIBUTE)) {
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168 String art = getArtifactIdentifier(source);
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169
253
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170 logger.info("Retrieve attribute of collection '" + identifier + "'");
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171 out = db.getCollectionAttribute(identifier, meta);
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172 }
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173 else if (action.equals(ACTION_GET_ITEM_ATTRIBUTE)) {
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174 String art = getArtifactIdentifier(source);
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175
142
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176 logger.info("Retrieve attribute of artifact '" + art + "'");
252
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177 out = db.getCollectionItemAttribute(identifier, art, meta);
142
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178 }
273
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179 else if (action.equals(ACTION_SET_TTL)) {
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180 out = db.setCollectionTTL(identifier, source, meta);
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181 }
275
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182 else if (action.equals(ACTION_SET_NAME)) {
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183 out = db.setCollectionName(identifier, source, meta);
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184 }
142
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185 else {
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186 throw new ArtifactDatabaseException(NO_SUCH_ACTION_MSG);
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187 }
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188 }
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189 catch (ArtifactDatabaseException adbe) {
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190 logger.warn(adbe.getLocalizedMessage(), adbe);
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191
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192 Response response = getResponse();
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193 response.setStatus(
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194 Status.CLIENT_ERROR_BAD_REQUEST, adbe.getMessage());
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195 return new EmptyRepresentation();
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196 }
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197
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198 return new DomRepresentation(MediaType.APPLICATION_XML, out);
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199 }
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200
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201
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202 @Override
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203 protected Representation innerPost(Representation requestRepr) {
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204 Document input = null;
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205 try {
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206 DomRepresentation in = new DomRepresentation(requestRepr);
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207 in.setNamespaceAware(true);
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208 input = in.getDocument();
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209 }
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210 catch (IOException ioe) {
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211 logger.error(ioe.getLocalizedMessage(), ioe);
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212
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213 Response response = getResponse();
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214 response.setStatus(Status.CLIENT_ERROR_BAD_REQUEST, ioe);
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215 return new EmptyRepresentation();
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216 }
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217
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218 String action = XMLUtils.xpathString(
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219 input, XPATH_ACTION, ArtifactNamespaceContext.INSTANCE);
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220
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221 if (action == null || action.length() == 0) {
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222 Response response = getResponse();
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223 response.setStatus(
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224 Status.CLIENT_ERROR_BAD_REQUEST, NO_ACTION_MSG);
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225 return new EmptyRepresentation();
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226 }
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227
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228 Request request = getRequest();
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229
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230 String identifier = (String) request.getAttributes().get("uuid");
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231
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232 ArtifactDatabase db = getArtifactDatabase();
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233
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234 return dispatch(identifier, action, input, db);
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235 }
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236
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237
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238 /**
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239 * Retrieves the identifier of the artifact used in the action.
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240 *
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241 * @param source The incoming document that describes the operation.
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242 *
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243 * @return the uuid of the artifact described in the document.
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244 */
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245 protected String getArtifactIdentifier(Document source) {
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246 return XMLUtils.xpathString(
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247 source, XPATH_ARTIFACT, ArtifactNamespaceContext.INSTANCE);
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248 }
268
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249
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250
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251 /**
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252 * Returns the attribute for a collection of the incoming request document.
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253 *
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254 * @param request The request document.
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255 *
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256 * @return the contained attribute as document.
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257 */
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258 protected Document getCollectionAttribute(Document request) {
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259 Node attr = (Node) XMLUtils.xpath(
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260 request,
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261 ArtifactDatabaseImpl.XPATH_COLLECTION_ATTRIBUTE,
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262 XPathConstants.NODE,
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263 ArtifactNamespaceContext.INSTANCE);
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264
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265 Document newAttr = XMLUtils.newDocument();
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266
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267 if (attr == null) {
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268 logger.error("Collection attribute document not found!");
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269 return newAttr;
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270 }
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271
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272 newAttr.appendChild(newAttr.importNode(attr, true));
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273
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274 return newAttr;
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275 }
142
e986e32bc7d4 Added a Rest resource that handles operations specific to a collection.
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276 }
http://dive4elements.wald.intevation.org