Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java @ 1178:1b432c260e97

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Enabled the FloodMapState to fetch waterlevel data from external Artifact. flys-artifacts/trunk@2764 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 15 Sep 2011 15:36:05 +0000
parents 3f3988bb6284
children f84ddc205c8b
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 if (artifactId != null
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56 && (artifactId = artifactId.trim()).length() == 0) {
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57 artifactId = null;
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58 }
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59
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60 String userId = XMLUtils.xpathString(
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61 data, XPATH_USER_ID, ArtifactNamespaceContext.INSTANCE);
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62
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63 if (userId != null
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64 && (userId = userId.trim()).length() == 0) {
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65 userId = null;
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66 }
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67
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68 String outs = XMLUtils.xpathString(
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69 data, XPATH_OUTS, ArtifactNamespaceContext.INSTANCE);
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70
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71 String parameters = XMLUtils.xpathString(
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72 data, XPATH_PARAMETERS, ArtifactNamespaceContext.INSTANCE);
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73
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74 return doService(
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75 artifactId, userId, outs, parameters, globalContext);
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76 }
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78 protected static Map<String, Object> splitParameters(
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79 String parameters,
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80 Map<String, Object> data
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81 ) {
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82 if (parameters != null) {
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83 String [] parts = parameters.split("\\s*;\\s*");
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84 for (String part: parts) {
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85 String [] kv = part.split("\\s*:\\s*");
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86 if (kv.length < 2 || (kv[0] = kv[0].trim()).length() == 0) {
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87 continue;
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88 }
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89 String [] values = kv[1].split("\\s*,\\s*");
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90 data.put(kv[0], values.length == 1 ? values[0] : values);
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91 }
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92 }
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93 return data;
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94 }
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95
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96 protected Document doService(
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97 String artifactId,
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98 String userId,
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99 String outsString,
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100 String parameters,
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101 GlobalContext globalContext
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102 ) {
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103 Document result = XMLUtils.newDocument();
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104
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105 FLYSArtifact flysArtifact;
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106
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107 if (log.isDebugEnabled()) {
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108 log.debug("artifact : " + artifactId);
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109 log.debug("user : " + userId);
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110 log.debug("outs : " + outsString);
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111 log.debug("parameters: " + parameters);
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112 }
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113
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114 if (userId != null && !StringUtils.checkUUID(userId)) {
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115 log.warn("'" + userId + "' is not a UUID");
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116 return result;
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117 }
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118
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119 if (artifactId != null) {
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120 if (!StringUtils.checkUUID(artifactId)) {
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121 log.warn("'" + artifactId + "' is not a UUID");
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122 return result;
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123 }
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124
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125 Object dbObject =
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126 (ArtifactDatabase)globalContext.get(ARTIFACT_DATA_BASE_KEY);
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127
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128 if (!(dbObject instanceof ArtifactDatabase)) {
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129 log.error("Cannot find artifact database");
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130 return result;
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131 }
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132
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133 ArtifactDatabase db = (ArtifactDatabase)dbObject;
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134
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135 Artifact artifact;
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136
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137 try {
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138 artifact = db.getRawArtifact(artifactId);
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139 }
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140 catch (ArtifactDatabaseException adbe) {
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141 log.warn("fetching artifact failed", adbe);
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142 return result;
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143 }
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144
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145 if (!(artifact instanceof FLYSArtifact)) {
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146 log.warn("artifact is not a FLYS artifact.");
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147 return result;
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148 }
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149
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150 flysArtifact = (FLYSArtifact)artifact;
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151 }
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152 else {
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153 flysArtifact = null;
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154 }
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155
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156
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157 Map<String, Object> data = splitParameters(
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158 parameters, new HashMap<String, Object>());
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159
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160 String [] outs = outsString == null
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161 ? new String [0]
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162 : outsString.split("\\s*,\\s*");
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163
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164 Recommendations rec = Recommendations.getInstance();
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165 rec.recommend(
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166 flysArtifact, userId, outs, data, result);
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167
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168 return result;
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169 }
372
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170 }
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171 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org