Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/Recommendations.java @ 4992:ecc6fd57b630 dami
SCHEMA CHANGE: added column dem.srid
author | Tom Gottfried <tom.gottfried@intevation.de> |
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date | Thu, 14 Feb 2013 17:38:34 +0100 |
parents | cbd0fafcb26b |
children | ac48ab9e1715 |
rev | line source |
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1 package de.intevation.flys.artifacts.datacage; |
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2 |
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3 import java.util.Map; |
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4 import java.util.HashMap; |
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5 import java.util.List; |
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6 import java.util.ArrayList; |
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7 |
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8 import java.io.InputStream; |
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9 import java.io.IOException; |
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10 import java.io.File; |
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11 |
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12 import java.io.FileInputStream; |
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13 |
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14 import java.sql.Connection; |
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15 import java.sql.SQLException; |
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16 |
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17 import org.apache.log4j.Logger; |
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18 |
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19 import org.w3c.dom.Document; |
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20 import org.w3c.dom.Node; |
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21 |
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22 import org.hibernate.Session; |
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23 |
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24 import org.hibernate.jdbc.Work; |
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25 |
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26 import de.intevation.artifacts.common.utils.Config; |
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27 import de.intevation.artifacts.common.utils.XMLUtils; |
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28 import de.intevation.artifacts.common.utils.StringUtils; |
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29 |
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30 import de.intevation.flys.artifacts.FLYSArtifact; |
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31 |
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32 import de.intevation.flys.backend.SessionHolder; |
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33 |
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34 import de.intevation.artifactdatabase.data.StateData; |
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35 |
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36 import de.intevation.flys.artifacts.datacage.templating.Builder; |
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37 |
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38 |
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39 /** |
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40 * Also accessible as Singleton with getInstance(). |
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41 */ |
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42 public class Recommendations |
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43 { |
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44 private static Logger log = Logger.getLogger(Recommendations.class); |
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45 |
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46 private static final boolean DEVELOPMENT_MODE = |
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47 Boolean.getBoolean("flys.datacage.recommendations.development"); |
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48 |
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49 public static final String XPATH_TEMPLATE = |
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50 "/artifact-database/metadata/template/text()"; |
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51 |
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52 public static final String DEFAULT_TEMPLATE_PATH = |
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53 "${artifacts.config.dir}/meta-data.xml"; |
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54 |
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55 private static Recommendations INSTANCE; |
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56 |
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57 public static class BuilderProvider |
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58 { |
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59 protected Builder builder; |
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60 |
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61 public BuilderProvider() { |
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62 } |
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63 |
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64 public BuilderProvider(Builder builder) { |
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65 this.builder = builder; |
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66 } |
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67 |
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68 public Builder getBuilder() { |
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69 return builder; |
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70 } |
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71 } // class BuilderProvider |
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72 |
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73 public static class FileBuilderProvider |
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74 extends BuilderProvider |
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75 { |
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76 protected File file; |
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77 protected long lastModified; |
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78 |
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79 public FileBuilderProvider() { |
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80 } |
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81 |
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82 public FileBuilderProvider(File file) { |
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83 this.file = file; |
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84 lastModified = Long.MIN_VALUE; |
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85 } |
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86 |
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87 @Override |
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88 public synchronized Builder getBuilder() { |
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89 long modified = file.lastModified(); |
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90 if (modified > lastModified) { |
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91 lastModified = modified; |
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92 try { |
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93 Document template = loadTemplate(file); |
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94 builder = new Builder(template); |
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95 } |
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96 catch (IOException ioe) { |
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97 log.error(ioe); |
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98 } |
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99 } |
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100 return builder; |
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101 } |
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102 |
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103 public BuilderProvider toStaticProvider() { |
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104 return new BuilderProvider(builder); |
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105 } |
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106 } // class BuilderProvider |
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107 |
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108 protected BuilderProvider builderProvider; |
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109 |
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110 public Recommendations() { |
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111 } |
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112 |
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113 public Recommendations(BuilderProvider builderProvider) { |
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114 this.builderProvider = builderProvider; |
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115 } |
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116 |
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117 public Builder getBuilder() { |
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118 return builderProvider.getBuilder(); |
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119 } |
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120 |
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121 protected static void artifactToParameters( |
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122 FLYSArtifact artifact, |
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123 Map<String, Object> parameters |
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124 ) { |
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125 parameters.put("CURRENT-STATE-ID", artifact.getCurrentStateId()); |
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126 parameters.put("ARTIFACT-ID", artifact.identifier()); |
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127 |
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128 for (StateData sd: artifact.getAllData()) { |
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129 Object value = sd.getValue(); |
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130 if (value == null) { |
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131 continue; |
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132 } |
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133 String key = sd.getName().replace('.', '-').toUpperCase(); |
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134 parameters.put(key, value); |
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135 } |
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136 } |
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137 |
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138 |
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139 /** |
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140 * Put Key/Values from \param src to \param dst, but uppercase |
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141 * both Keys and Values. |
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142 */ |
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143 public static void convertKeysToUpperCase( |
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144 Map<String, Object> src, |
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145 Map<String, Object> dst |
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146 ) { |
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147 for (Map.Entry<String, Object> entry: src.entrySet()) { |
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148 dst.put(entry.getKey().toUpperCase(), entry.getValue()); |
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149 } |
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150 } |
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151 |
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152 |
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153 /** |
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154 * Append recommendations to \param result. |
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155 * @param extraParameters parameters (typicall example: 'recommended') |
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156 */ |
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157 public void recommend( |
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158 FLYSArtifact artifact, |
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159 String userId, |
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160 String [] outs, |
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161 Map<String, Object> extraParameters, |
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162 Node result |
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163 ) { |
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164 Map<String, Object> parameters = new HashMap<String, Object>(); |
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165 |
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166 if (extraParameters != null) { |
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167 convertKeysToUpperCase(extraParameters, parameters); |
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168 } |
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169 |
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170 if (userId != null) { |
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171 parameters.put("USER-ID", userId); |
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172 } |
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173 |
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174 if (artifact != null) { |
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175 artifactToParameters(artifact, parameters); |
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176 } |
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177 |
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178 parameters.put("ARTIFACT-OUTS", StringUtils.toUpperCase(outs)); |
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179 |
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180 parameters.put("PARAMETERS", parameters); |
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181 |
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182 recommend(parameters, userId, result); |
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183 } |
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184 |
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185 |
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186 /** |
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187 * Append recommendations to \param result. |
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188 */ |
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189 public void recommend( |
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190 Map<String, Object> parameters, |
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191 String userId, |
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192 Node result |
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193 ) { |
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194 recommend(parameters, userId, result, SessionHolder.HOLDER.get()); |
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195 } |
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196 |
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197 public void recommend( |
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198 final Map<String, Object> parameters, |
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199 final String userId, |
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200 final Node result, |
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201 Session session |
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202 ) { |
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203 session.doWork(new Work() { |
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204 @Override |
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205 public void execute(Connection systemConnection) |
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206 throws SQLException |
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207 { |
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208 List<Builder.NamedConnection> connections = |
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209 new ArrayList<Builder.NamedConnection>(2); |
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210 |
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211 Connection userConnection = userId != null |
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212 ? DBConfig |
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213 .getInstance() |
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214 .getDBConnection() |
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215 .getDataSource() |
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216 .getConnection() |
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217 : null; |
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218 |
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219 try { |
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220 if (userConnection != null) { |
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221 connections.add(new Builder.NamedConnection( |
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222 Builder.CONNECTION_USER, userConnection, false)); |
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223 } |
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224 |
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225 connections.add(new Builder.NamedConnection( |
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226 Builder.CONNECTION_SYSTEM, systemConnection, true)); |
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227 |
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228 getBuilder().build(connections, result, parameters); |
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229 } |
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230 finally { |
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231 if (userConnection != null) { |
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232 userConnection.close(); |
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233 } |
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234 } |
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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 |
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240 /** Get singleton instance. */ |
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241 public static synchronized Recommendations getInstance() { |
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242 if (INSTANCE == null) { |
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243 INSTANCE = createRecommendations(); |
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244 } |
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245 return INSTANCE; |
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246 } |
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247 |
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248 |
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249 protected static Document loadTemplate(File file) throws IOException { |
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250 InputStream in = null; |
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251 |
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252 try { |
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253 in = new FileInputStream(file); |
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254 |
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255 Document template = XMLUtils.parseDocument(in); |
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256 |
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257 if (template == null) { |
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258 throw new IOException("cannot load template"); |
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259 } |
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260 return template; |
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261 } |
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262 finally { |
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263 if (in != null) { |
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264 try { |
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265 in.close(); |
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266 } |
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267 catch (IOException ioe) { |
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268 log.error(ioe); |
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269 } |
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270 } |
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271 } |
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272 } |
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273 |
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274 public static Recommendations createRecommendations(File file) { |
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275 log.debug("Recommendations.createBuilder"); |
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276 |
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277 if (!file.isFile() || !file.canRead()) { |
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278 log.error("Cannot open template file '" + file + "'"); |
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279 return null; |
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280 } |
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281 |
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282 FileBuilderProvider fbp = new FileBuilderProvider(file); |
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283 |
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284 if (fbp.getBuilder() == null) { |
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285 log.error("failed loading builder"); |
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286 return null; |
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287 } |
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288 |
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289 BuilderProvider bp = DEVELOPMENT_MODE |
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290 ? fbp |
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291 : fbp.toStaticProvider(); |
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292 |
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293 return new Recommendations(bp); |
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294 } |
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295 |
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296 protected static Recommendations createRecommendations() { |
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297 log.debug("Recommendations.createRecommendations"); |
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298 |
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299 String path = Config.getStringXPath(XPATH_TEMPLATE); |
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300 |
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301 if (path == null) { |
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302 path = DEFAULT_TEMPLATE_PATH; |
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303 } |
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304 |
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305 path = Config.replaceConfigDir(path); |
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306 |
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307 log.info("Meta data template: " + path); |
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308 |
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309 return createRecommendations(new File(path)); |
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310 } |
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311 } |
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312 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |