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annotate flys-artifacts/src/main/java/org/dive4elements/river/artifacts/datacage/Recommendations.java @ 5831:bd047b71ab37

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Repaired internal references
author Sascha L. Teichmann <teichmann@intevation.de>
date Thu, 25 Apr 2013 12:06:39 +0200
parents flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/Recommendations.java@ebec12def170
children
rev   line source
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1 package org.dive4elements.river.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 import org.hibernate.SessionFactory;
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24
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25 import org.hibernate.jdbc.Work;
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26
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27 import org.dive4elements.artifacts.common.utils.Config;
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28 import org.dive4elements.artifacts.common.utils.XMLUtils;
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29 import org.dive4elements.artifacts.common.utils.StringUtils;
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30
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31 import org.dive4elements.river.artifacts.FLYSArtifact;
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32
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33 import org.dive4elements.river.backend.SessionFactoryProvider;
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34 import org.dive4elements.river.backend.SessionHolder;
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35
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36 import org.dive4elements.artifactdatabase.data.StateData;
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37
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38 import org.dive4elements.river.artifacts.datacage.templating.Builder;
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39 import org.dive4elements.river.artifacts.datacage.templating.BuilderPool;
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40
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41
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42 /**
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43 * Also accessible as Singleton with getInstance().
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44 */
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45 public class Recommendations
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46 {
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47 public static final String CONNECTION_USER = "user";
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48 public static final String CONNECTION_SYSTEM = "system";
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49 public static final String CONNECTION_SEDDB = "seddb";
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50
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51 public static final String DEFAULT_CONNECTION_NAME = CONNECTION_SYSTEM;
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52
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53 private static Logger log = Logger.getLogger(Recommendations.class);
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54
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55 private static final boolean DEVELOPMENT_MODE =
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56 Boolean.getBoolean("flys.datacage.recommendations.development");
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57
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58 public static final String XPATH_TEMPLATE =
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59 "/artifact-database/metadata/template/text()";
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60
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61 public static final String DEFAULT_TEMPLATE_PATH =
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62 "${artifacts.config.dir}/meta-data.xml";
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63
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64 private static Recommendations INSTANCE;
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65
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66 public static class BuilderPoolProvider
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67 {
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68 protected BuilderPool builderPool;
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69
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70 public BuilderPoolProvider() {
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71 }
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72
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73 public BuilderPoolProvider(BuilderPool builderPool) {
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74 this.builderPool = builderPool;
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75 }
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76
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77 public BuilderPool getBuilderPool() {
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78 return builderPool;
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79 }
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80 } // class BuilderProvider
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81
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82 public static class FileBuilderPoolProvider
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83 extends BuilderPoolProvider
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84 {
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85 protected File file;
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86 protected long lastModified;
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87
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88 public FileBuilderPoolProvider() {
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89 }
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90
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91 public FileBuilderPoolProvider(File file) {
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92 this.file = file;
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93 lastModified = Long.MIN_VALUE;
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94 }
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95
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96 @Override
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97 public synchronized BuilderPool getBuilderPool() {
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98 long modified = file.lastModified();
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99 if (modified > lastModified) {
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100 lastModified = modified;
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101 try {
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102 Document template = loadTemplate(file);
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103 builderPool = new BuilderPool(template);
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104 }
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105 catch (IOException ioe) {
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106 log.error(ioe);
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107 }
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108 }
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109 return builderPool;
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110 }
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111
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112 public BuilderPoolProvider toStaticProvider() {
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113 return new BuilderPoolProvider(builderPool);
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114 }
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115 } // class BuilderProvider
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116
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117 protected BuilderPoolProvider builderPoolProvider;
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118
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119 public Recommendations() {
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120 }
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121
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122 public Recommendations(BuilderPoolProvider builderPoolProvider) {
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123 this.builderPoolProvider = builderPoolProvider;
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124 }
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125
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126 public BuilderPool getBuilderPool() {
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127 return builderPoolProvider.getBuilderPool();
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128 }
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129
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130 protected static void artifactToParameters(
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131 FLYSArtifact artifact,
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132 Map<String, Object> parameters
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133 ) {
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134 parameters.put("CURRENT-STATE-ID", artifact.getCurrentStateId());
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135 parameters.put("ARTIFACT-ID", artifact.identifier());
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136
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137 for (StateData sd: artifact.getAllData()) {
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138 Object value = sd.getValue();
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139 if (value == null) {
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140 continue;
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141 }
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142 String key = sd.getName().replace('.', '-').toUpperCase();
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143 parameters.put(key, value);
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144 }
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145 }
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146
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147 /**
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148 * Put Key/Values from \param src to \param dst, but uppercase
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149 * both Keys and Values.
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150 */
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151 public static void convertKeysToUpperCase(
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152 Map<String, Object> src,
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153 Map<String, Object> dst
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154 ) {
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155 for (Map.Entry<String, Object> entry: src.entrySet()) {
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156 dst.put(entry.getKey().toUpperCase(), entry.getValue());
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157 }
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158 }
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159
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160
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161 /**
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162 * Append recommendations to \param result.
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163 * @param extraParameters parameters (typicall example: 'recommended')
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164 */
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165 public void recommend(
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166 FLYSArtifact artifact,
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167 String userId,
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168 String [] outs,
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169 Map<String, Object> extraParameters,
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170 Node result
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171 ) {
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172 Map<String, Object> parameters = new HashMap<String, Object>();
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173
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174 if (extraParameters != null) {
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175 convertKeysToUpperCase(extraParameters, parameters);
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176 }
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177
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178 if (userId != null) {
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179 parameters.put("USER-ID", userId);
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180 }
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181
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182 if (artifact != null) {
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183 artifactToParameters(artifact, parameters);
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184 }
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185
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186 parameters.put("ARTIFACT-OUTS", StringUtils.toUpperCase(outs));
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187
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188 parameters.put("PARAMETERS", parameters);
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189
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190 recommend(parameters, userId, result);
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191 }
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192
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193
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194 /**
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195 * Append recommendations to \param result.
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196 */
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197 public void recommend(
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198 Map<String, Object> parameters,
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199 String userId,
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200 Node result
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201 ) {
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202 recommend(parameters, userId, result, SessionHolder.HOLDER.get());
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203 }
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204
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205 public void recommend(
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206 final Map<String, Object> parameters,
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207 final String userId,
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208 final Node result,
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209 Session systemSession
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210 ) {
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211 systemSession.doWork(new Work() {
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212 @Override
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213 public void execute(final Connection systemConnection)
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214 throws SQLException
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215 {
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216 SessionFactory sedDBFactory =
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217 SessionFactoryProvider.getSedDBSessionFactory();
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218
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219 Session sedDBSession = sedDBFactory.openSession();
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220 try {
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221 sedDBSession.doWork(new Work() {
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222 @Override
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223 public void execute(Connection sedDBConnection)
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224 throws SQLException
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225 {
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226 recommend(
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227 parameters, userId, result,
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228 systemConnection,
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229 sedDBConnection);
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230 }
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231 });
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232 }
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233 finally {
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234 sedDBSession.close();
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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 public void recommend(
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241 Map<String, Object> parameters,
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242 String userId,
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243 Node result,
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244 Connection systemConnection,
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245 Connection seddbConnection
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246 ) throws SQLException
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247 {
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248 List<Builder.NamedConnection> connections =
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249 new ArrayList<Builder.NamedConnection>(3);
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250
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251 Connection userConnection = userId != null
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252 ? DBConfig
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253 .getInstance()
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254 .getDBConnection()
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255 .getDataSource()
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256 .getConnection()
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257 : null;
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258
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259 try {
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260 connections.add(new Builder.NamedConnection(
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261 CONNECTION_SYSTEM, systemConnection, true));
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262
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263 if (seddbConnection != null) {
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264 connections.add(new Builder.NamedConnection(
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265 CONNECTION_SEDDB, seddbConnection, true));
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266 }
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267
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268 if (userConnection != null) {
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269 connections.add(new Builder.NamedConnection(
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270 CONNECTION_USER, userConnection, false));
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271 }
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272
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273 getBuilderPool().build(connections, result, parameters);
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274 }
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275 finally {
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276 if (userConnection != null) {
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277 userConnection.close();
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278 }
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279 }
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280 }
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281
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282 /** Get singleton instance. */
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283 public static synchronized Recommendations getInstance() {
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284 if (INSTANCE == null) {
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285 INSTANCE = createRecommendations();
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286 }
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287 return INSTANCE;
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288 }
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289
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290
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291 protected static Document loadTemplate(File file) throws IOException {
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292 InputStream in = new FileInputStream(file);
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293
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294 try {
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295 Document template = XMLUtils.parseDocument(in);
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296 if (template == null) {
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297 throw new IOException("cannot load template");
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298 }
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299 return template;
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300 }
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301 finally {
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302 in.close();
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303 }
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304 }
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305
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306 public static Recommendations createRecommendations(File file) {
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307 log.debug("Recommendations.createBuilder");
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308
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309 if (!file.isFile() || !file.canRead()) {
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310 log.error("Cannot open template file '" + file + "'");
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311 return null;
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312 }
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313
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314 FileBuilderPoolProvider fbp = new FileBuilderPoolProvider(file);
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315
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316 if (fbp.getBuilderPool() == null) {
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317 log.error("failed loading builder");
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318 return null;
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319 }
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320
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321 BuilderPoolProvider bp = DEVELOPMENT_MODE
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322 ? fbp
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323 : fbp.toStaticProvider();
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324
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325 return new Recommendations(bp);
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326 }
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327
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328 protected static Recommendations createRecommendations() {
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329 log.debug("Recommendations.createRecommendations");
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330
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331 String path = Config.getStringXPath(XPATH_TEMPLATE);
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332
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333 if (path == null) {
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334 path = DEFAULT_TEMPLATE_PATH;
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335 }
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336
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337 path = Config.replaceConfigDir(path);
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338
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339 log.info("Meta data template: " + path);
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340
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341 return createRecommendations(new File(path));
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342 }
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343 }
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344 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org