Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java @ 1015:9a1a3080ad98

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Bring user specific meta data service to life. flys-artifacts/trunk@2461 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Wed, 03 Aug 2011 16:40:04 +0000
parents b81626b10cb7
children ff7b81cf9999
rev   line source
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1 package de.intevation.flys.artifacts.services;
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2
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3 import org.w3c.dom.Document;
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4
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5 import org.apache.log4j.Logger;
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6
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7 import java.util.Map;
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8 import java.util.HashMap;
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9
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10 import de.intevation.artifacts.Artifact;
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11 import de.intevation.artifacts.CallMeta;
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12 import de.intevation.artifacts.GlobalContext;
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13 import de.intevation.artifacts.ArtifactDatabase;
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14 import de.intevation.artifacts.ArtifactDatabaseException;
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15
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16 import de.intevation.artifactdatabase.DefaultService;
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17
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18 import de.intevation.artifacts.common.utils.XMLUtils;
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19 import de.intevation.artifacts.common.utils.StringUtils;
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20
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21 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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22
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23 import de.intevation.flys.artifacts.datacage.Recommendations;
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24
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25 import de.intevation.flys.artifacts.FLYSArtifact;
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26
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27 public class MetaDataService
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28 extends DefaultService
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29 {
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30 private static Logger log = Logger.getLogger(MetaDataService.class);
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31
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32 public static final String XPATH_ARTIFACT_ID = "/art:meta/art:artifact-id/@value";
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33 public static final String XPATH_USER_ID = "/art:meta/art:user-id/@value";
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34 public static final String XPATH_OUTS = "/art:meta/art:outs/@value";
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35 public static final String XPATH_PARAMETERS = "/art:meta/art:parameters/@value";
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36
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37 /** The global context key of the artifact database */
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38 public static final String ARTIFACT_DATA_BASE_KEY =
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39 "global.artifact.database";
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40
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41 public MetaDataService() {
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42 }
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43
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44 @Override
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45 public Document process(
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46 Document data,
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47 GlobalContext globalContext,
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48 CallMeta callMeta
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49 ) {
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50 log.debug("MetaDataService.process");
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51
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52 String artifactId = XMLUtils.xpathString(
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53 data, XPATH_ARTIFACT_ID, ArtifactNamespaceContext.INSTANCE);
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54
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55 String userId = XMLUtils.xpathString(
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56 data, XPATH_USER_ID, ArtifactNamespaceContext.INSTANCE);
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57
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58 String outs = XMLUtils.xpathString(
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59 data, XPATH_OUTS, ArtifactNamespaceContext.INSTANCE);
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60
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61 String parameters = XMLUtils.xpathString(
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62 data, XPATH_PARAMETERS, ArtifactNamespaceContext.INSTANCE);
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63
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64 return doService(
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65 artifactId, userId, outs, parameters, globalContext);
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66 }
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67
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68 protected static Map<String, Object> splitParameters(
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69 String parameters,
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70 Map<String, Object> data
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71 ) {
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72 if (parameters != null) {
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73 String [] parts = parameters.split("\\s*;\\s*");
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74 for (String part: parts) {
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75 String [] kv = part.split("\\s*:\\s*");
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76 if (kv.length < 2 || (kv[0] = kv[0].trim()).length() == 0) {
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77 continue;
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78 }
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79 String [] values = kv[1].split("\\s*,\\s*");
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80 data.put(kv[0], values.length == 1 ? values[0] : values);
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81 }
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82 }
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83 return data;
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84 }
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85
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86 protected Document doService(
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87 String artifactId,
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88 String userId,
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89 String outsString,
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90 String parameters,
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91 GlobalContext globalContext
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92 ) {
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93 Document result = XMLUtils.newDocument();
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94
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95 FLYSArtifact flysArtifact;
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96
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97 if (log.isDebugEnabled()) {
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98 log.debug("artifact : " + artifactId);
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99 log.debug("user : " + userId);
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100 log.debug("outs : " + outsString);
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101 log.debug("parameters: " + parameters);
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102 }
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103
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104 if (userId != null && !StringUtils.checkUUID(userId)) {
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105 log.warn("'" + userId + "' is not a UUID");
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106 return result;
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107 }
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108
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109 if (artifactId != null) {
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110 if (!StringUtils.checkUUID(artifactId)) {
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111 log.warn("'" + artifactId + "' is not a UUID");
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112 return result;
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113 }
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114
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115 Object dbObject =
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116 (ArtifactDatabase)globalContext.get(ARTIFACT_DATA_BASE_KEY);
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117
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118 if (!(dbObject instanceof ArtifactDatabase)) {
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119 log.error("Cannot find artifact database");
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120 return result;
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121 }
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122
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123 ArtifactDatabase db = (ArtifactDatabase)dbObject;
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124
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125 Artifact artifact;
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126
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127 try {
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128 artifact = db.getRawArtifact(artifactId);
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129 }
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130 catch (ArtifactDatabaseException adbe) {
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131 log.warn("fetching artifact failed", adbe);
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132 return result;
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133 }
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134
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135 if (!(artifact instanceof FLYSArtifact)) {
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136 log.warn("artifact is not a FLYS artifact.");
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137 return result;
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138 }
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139
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140 flysArtifact = (FLYSArtifact)artifact;
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141 }
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142 else {
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143 flysArtifact = null;
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144 }
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145
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146
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147 Map<String, Object> data = splitParameters(
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148 parameters, new HashMap<String, Object>());
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149
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150 String [] outs = outsString.split("\\s*,\\s*");
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151
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152 Recommendations rec = Recommendations.getInstance();
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153 rec.recommend(
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154 flysArtifact, userId, outs, data, result);
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155
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156 return result;
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157 }
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158 }
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159 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org