Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/services/MetaDataService.java @ 9232:5030c46d8cb4

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Implemented xpath function that selectes the 'mean year' of a fixation-artifact. Needs to provide the ArtifactDatabase to the builder implementation.
author gernotbelger
date Fri, 06 Jul 2018 13:09:54 +0200
parents 5e38e2924c07
children
rev   line source
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4897a58c8746 River artifacts: Added new copyright headers.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.artifacts.services;
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10
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11 import org.w3c.dom.Document;
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12
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13 import org.apache.log4j.Logger;
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14
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15 import java.util.Map;
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16 import java.util.HashMap;
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17
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18 import org.dive4elements.artifactdatabase.ArtifactCallContext;
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19 import org.dive4elements.artifactdatabase.ArtifactDatabaseImpl;
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20 import org.dive4elements.artifacts.Artifact;
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21 import org.dive4elements.artifacts.CallMeta;
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22 import org.dive4elements.artifacts.GlobalContext;
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23 import org.dive4elements.artifacts.ArtifactDatabase;
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24 import org.dive4elements.artifacts.ArtifactDatabaseException;
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25 import org.dive4elements.artifacts.CallContext;
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26 import org.dive4elements.artifacts.common.utils.XMLUtils;
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27 import org.dive4elements.artifacts.common.utils.StringUtils;
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28
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29 import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
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30
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31 import org.dive4elements.river.artifacts.datacage.Recommendations;
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32
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33 import org.dive4elements.river.artifacts.D4EArtifact;
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34
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35
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36 /**
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37 * Following XPaths are evaluated on the incoming document.
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38 *
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39 * "/art:meta/art:artifact-id/@value" The UUID of the artifact. Optional.
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40 * Used to fill the template enviroment.
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41 * "/art:meta/art:user-id/@value" The UUID of the user. Optional.
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42 * If given the user specific template is
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43 * filled.
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44 * "/art:meta/art:outs/@value" The list of outs used to recommend
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45 * for the
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46 * various outputs.
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47 * "/art:meta/art:parameters/@value" A list of key/value pairs to inject more
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48 * filters to the templating, as
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49 * "key:value;key2:value2"
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50 */
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51 public class MetaDataService
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52 extends D4EService
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53 {
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54 private static Logger log = Logger.getLogger(MetaDataService.class);
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55
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56 public static final String XPATH_ARTIFACT_ID =
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57 "/art:meta/art:artifact-id/@value";
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58 public static final String XPATH_USER_ID =
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59 "/art:meta/art:user-id/@value";
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60 public static final String XPATH_OUTS =
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61 "/art:meta/art:outs/@value";
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62 public static final String XPATH_PARAMETERS =
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63 "/art:meta/art:parameters/@value";
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64
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65 /** The global context key of the artifact database. */
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66 public static final String ARTIFACT_DATA_BASE_KEY =
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67 "global.artifact.database";
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68
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69 public MetaDataService() {
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70 }
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71
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72 @Override
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73 protected Document doProcess(
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74 Document data,
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75 GlobalContext globalContext,
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76 CallMeta callMeta
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77 ) {
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78 log.debug("MetaDataService.process");
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79
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80 String artifactId = XMLUtils.xpathString(
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81 data, XPATH_ARTIFACT_ID, ArtifactNamespaceContext.INSTANCE);
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82
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83 if (artifactId != null
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84 && (artifactId = artifactId.trim()).length() == 0) {
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85 artifactId = null;
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86 }
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87
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88 String userId = XMLUtils.xpathString(
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89 data, XPATH_USER_ID, ArtifactNamespaceContext.INSTANCE);
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90
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91 if (userId != null
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92 && (userId = userId.trim()).length() == 0) {
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93 userId = null;
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94 }
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95
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96 String outs = XMLUtils.xpathString(
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97 data, XPATH_OUTS, ArtifactNamespaceContext.INSTANCE);
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98
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99 String parameters = XMLUtils.xpathString(
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100 data, XPATH_PARAMETERS, ArtifactNamespaceContext.INSTANCE);
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101
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102 return doService( artifactId, userId, outs, parameters, globalContext, callMeta);
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103 }
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104
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105
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106 /**
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107 * Split parameterstring in the form of key1:value1;key2:value2
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108 * into hash (key1->value1, key2->value2).
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109 * @param parameters "key1:value1;key2:value2"
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110 * @param data Map into wich to put parameter hash and return.
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111 * @return parameter data
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112 */
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113 protected static Map<String, Object> splitParameters(
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114 String parameters,
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115 Map<String, Object> data
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116 ) {
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117 if (parameters != null) {
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118 String [] parts = parameters.split("\\s*;\\s*");
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119 for (String part: parts) {
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120 String [] kv = part.split("\\s*:\\s*");
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121 if (kv.length < 2 || (kv[0] = kv[0].trim()).length() == 0) {
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122 continue;
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123 }
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124 String [] values = kv[1].split("\\s*,\\s*");
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125 data.put(kv[0], values.length == 1 ? values[0] : values);
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126 }
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127 }
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128 return data;
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129 }
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130
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131 /** Return the document containing matched stuff from meta-data.xml. */
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132 protected Document doService(
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133 String artifactId,
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134 String userId,
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135 String outsString,
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136 String parameters,
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137 GlobalContext globalContext,
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138 CallMeta callMeta
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139 ) {
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140 Document result = XMLUtils.newDocument();
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141
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142 D4EArtifact flysArtifact;
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143
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144 if (log.isDebugEnabled()) {
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145 log.debug("artifact : " + artifactId);
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146 log.debug("user : " + userId);
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147 log.debug("outs : " + outsString);
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148 log.debug("parameters: " + parameters);
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149 }
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150
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151 if (userId != null && !StringUtils.checkUUID(userId)) {
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152 log.warn("'" + userId + "' is not a UUID");
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153 return result;
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154 }
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155
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156 Object dbObject = (ArtifactDatabase)globalContext.get(ARTIFACT_DATA_BASE_KEY);
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157 if (!(dbObject instanceof ArtifactDatabase)) {
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158 log.error("Cannot find artifact database");
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159 return result;
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160 }
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161 ArtifactDatabaseImpl db = (ArtifactDatabaseImpl)dbObject;
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162
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163 if (artifactId != null) {
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164 if (!StringUtils.checkUUID(artifactId)) {
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165 log.warn("'" + artifactId + "' is not a UUID");
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166 return result;
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167 }
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168
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169 Artifact artifact;
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170
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171 try {
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172 artifact = db.getRawArtifact(artifactId);
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173 }
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174 catch (ArtifactDatabaseException adbe) {
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175 log.warn("fetching artifact failed", adbe);
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176 return result;
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177 }
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178
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179 if (!(artifact instanceof D4EArtifact)) {
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180 log.warn("artifact is not a D4E artifact.");
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181 return result;
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182 }
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183
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184 flysArtifact = (D4EArtifact)artifact;
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185 }
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186 else {
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187 flysArtifact = null;
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188 }
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189
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190
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191 Map<String, Object> data = splitParameters(
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192 parameters, new HashMap<String, Object>());
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193
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194 String [] outs = outsString == null
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195 ? new String [0]
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196 : outsString.split("\\s*,\\s*");
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197
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198
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199 // REMARK: this is an ugly place to do it and should rather be done inside the ArtifactDatabase, from where this service is called.
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200 // REMARK: at the moment we know that this is currently only used to transport the ArtifactDatabase
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201 final ArtifactCallContext callContext = new ArtifactCallContext(db, CallContext.NOTHING, callMeta, null);
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202
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203 final Recommendations rec = Recommendations.getInstance();
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204 rec.recommend( flysArtifact, userId, outs, data, result, callContext );
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205
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206 callContext.postCall();
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207
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208 return result;
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209 }
372
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parents:
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210 }
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211 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org