Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/Recommendations.java @ 5531:ac48ab9e1715

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Datacage: Added connection to SedDB. Use <dc:context connection="seddb"> to use it.
author Sascha L. Teichmann <teichmann@intevation.de>
date Wed, 03 Apr 2013 12:54:34 +0200
parents cbd0fafcb26b
children 3e8f7b4bdf20
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.SedDBSessionHolder;
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33 import de.intevation.flys.backend.SessionHolder;
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34
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35 import de.intevation.artifactdatabase.data.StateData;
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36
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37 import de.intevation.flys.artifacts.datacage.templating.Builder;
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38
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39
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40 /**
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41 * Also accessible as Singleton with getInstance().
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42 */
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43 public class Recommendations
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44 {
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45 public static final String CONNECTION_USER = "user";
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46 public static final String CONNECTION_SYSTEM = "system";
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47 public static final String CONNECTION_SEDDB = "seddb";
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49 public static final String DEFAULT_CONNECTION_NAME = CONNECTION_SYSTEM;
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50
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51 private static Logger log = Logger.getLogger(Recommendations.class);
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52
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53 private static final boolean DEVELOPMENT_MODE =
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54 Boolean.getBoolean("flys.datacage.recommendations.development");
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55
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56 public static final String XPATH_TEMPLATE =
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57 "/artifact-database/metadata/template/text()";
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58
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59 public static final String DEFAULT_TEMPLATE_PATH =
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60 "${artifacts.config.dir}/meta-data.xml";
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61
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62 private static Recommendations INSTANCE;
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63
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64 public static class BuilderProvider
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65 {
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66 protected Builder builder;
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67
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68 public BuilderProvider() {
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69 }
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71 public BuilderProvider(Builder builder) {
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72 this.builder = builder;
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73 }
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74
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75 public Builder getBuilder() {
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76 return builder;
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77 }
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78 } // class BuilderProvider
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79
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80 public static class FileBuilderProvider
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81 extends BuilderProvider
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82 {
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83 protected File file;
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84 protected long lastModified;
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85
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86 public FileBuilderProvider() {
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87 }
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88
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89 public FileBuilderProvider(File file) {
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90 this.file = file;
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91 lastModified = Long.MIN_VALUE;
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92 }
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93
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94 @Override
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95 public synchronized Builder getBuilder() {
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96 long modified = file.lastModified();
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97 if (modified > lastModified) {
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98 lastModified = modified;
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99 try {
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100 Document template = loadTemplate(file);
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101 builder = new Builder(template);
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102 }
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103 catch (IOException ioe) {
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104 log.error(ioe);
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105 }
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106 }
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107 return builder;
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108 }
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109
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110 public BuilderProvider toStaticProvider() {
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111 return new BuilderProvider(builder);
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112 }
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113 } // class BuilderProvider
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114
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115 protected BuilderProvider builderProvider;
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116
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117 public Recommendations() {
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118 }
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119
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120 public Recommendations(BuilderProvider builderProvider) {
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121 this.builderProvider = builderProvider;
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122 }
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123
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124 public Builder getBuilder() {
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125 return builderProvider.getBuilder();
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126 }
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127
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128 protected static void artifactToParameters(
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129 FLYSArtifact artifact,
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130 Map<String, Object> parameters
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131 ) {
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132 parameters.put("CURRENT-STATE-ID", artifact.getCurrentStateId());
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133 parameters.put("ARTIFACT-ID", artifact.identifier());
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134
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135 for (StateData sd: artifact.getAllData()) {
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136 Object value = sd.getValue();
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137 if (value == null) {
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138 continue;
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139 }
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140 String key = sd.getName().replace('.', '-').toUpperCase();
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141 parameters.put(key, value);
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142 }
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143 }
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144
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145
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146 /**
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147 * Put Key/Values from \param src to \param dst, but uppercase
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148 * both Keys and Values.
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149 */
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150 public static void convertKeysToUpperCase(
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151 Map<String, Object> src,
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152 Map<String, Object> dst
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153 ) {
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154 for (Map.Entry<String, Object> entry: src.entrySet()) {
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155 dst.put(entry.getKey().toUpperCase(), entry.getValue());
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156 }
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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 * Append recommendations to \param result.
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162 * @param extraParameters parameters (typicall example: 'recommended')
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163 */
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164 public void recommend(
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165 FLYSArtifact artifact,
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166 String userId,
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167 String [] outs,
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168 Map<String, Object> extraParameters,
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169 Node result
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170 ) {
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171 Map<String, Object> parameters = new HashMap<String, Object>();
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172
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173 if (extraParameters != null) {
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174 convertKeysToUpperCase(extraParameters, parameters);
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175 }
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176
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177 if (userId != null) {
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178 parameters.put("USER-ID", userId);
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179 }
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180
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181 if (artifact != null) {
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182 artifactToParameters(artifact, parameters);
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183 }
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184
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185 parameters.put("ARTIFACT-OUTS", StringUtils.toUpperCase(outs));
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186
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187 parameters.put("PARAMETERS", parameters);
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188
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189 recommend(parameters, userId, result);
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190 }
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191
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192
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193 /**
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194 * Append recommendations to \param result.
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195 */
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196 public void recommend(
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197 Map<String, Object> parameters,
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198 String userId,
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199 Node result
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200 ) {
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201 recommend(parameters, userId, result, SessionHolder.HOLDER.get());
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202 }
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203
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204 public void recommend(
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205 final Map<String, Object> parameters,
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206 final String userId,
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207 final Node result,
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208 Session systemSession
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209 ) {
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210 systemSession.doWork(new Work() {
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211 @Override
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212 public void execute(final Connection systemConnection)
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213 throws SQLException
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214 {
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215 SedDBSessionHolder.HOLDER.get().doWork(new Work() {
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216 @Override
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217 public void execute(Connection sedDBConnection)
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218 throws SQLException
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219 {
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220 recommend(
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221 parameters, userId, result,
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222 systemConnection,
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223 sedDBConnection);
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224 }
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225 });
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226 }
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227 });
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228 }
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229
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230 public void recommend(
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231 Map<String, Object> parameters,
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232 String userId,
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233 Node result,
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234 Connection systemConnection,
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235 Connection seddbConnection
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236 ) throws SQLException
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237 {
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238 List<Builder.NamedConnection> connections =
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239 new ArrayList<Builder.NamedConnection>(3);
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240
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241 Connection userConnection = userId != null
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242 ? DBConfig
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243 .getInstance()
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244 .getDBConnection()
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245 .getDataSource()
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246 .getConnection()
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247 : null;
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248
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249 try {
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250 connections.add(new Builder.NamedConnection(
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251 CONNECTION_SYSTEM, systemConnection, true));
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252
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253 connections.add(new Builder.NamedConnection(
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254 CONNECTION_SEDDB, seddbConnection, true));
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255
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256 if (userConnection != null) {
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257 connections.add(new Builder.NamedConnection(
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258 CONNECTION_USER, userConnection, false));
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259 }
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260
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261
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262 getBuilder().build(connections, result, parameters);
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263 }
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264 finally {
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265 if (userConnection != null) {
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266 userConnection.close();
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267 }
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268 }
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269 }
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270
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271 /** Get singleton instance. */
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272 public static synchronized Recommendations getInstance() {
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273 if (INSTANCE == null) {
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274 INSTANCE = createRecommendations();
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275 }
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276 return INSTANCE;
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277 }
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278
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279
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280 protected static Document loadTemplate(File file) throws IOException {
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281 InputStream in = null;
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282
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283 try {
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284 in = new FileInputStream(file);
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285
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286 Document template = XMLUtils.parseDocument(in);
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287
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288 if (template == null) {
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289 throw new IOException("cannot load template");
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290 }
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291 return template;
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292 }
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293 finally {
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294 if (in != null) {
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295 try {
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296 in.close();
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297 }
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298 catch (IOException ioe) {
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299 log.error(ioe);
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300 }
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301 }
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302 }
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303 }
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304
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305 public static Recommendations createRecommendations(File file) {
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306 log.debug("Recommendations.createBuilder");
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307
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308 if (!file.isFile() || !file.canRead()) {
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309 log.error("Cannot open template file '" + file + "'");
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310 return null;
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311 }
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312
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313 FileBuilderProvider fbp = new FileBuilderProvider(file);
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314
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315 if (fbp.getBuilder() == null) {
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316 log.error("failed loading builder");
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317 return null;
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318 }
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319
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320 BuilderProvider bp = DEVELOPMENT_MODE
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321 ? fbp
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322 : fbp.toStaticProvider();
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323
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324 return new Recommendations(bp);
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325 }
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326
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327 protected static Recommendations createRecommendations() {
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328 log.debug("Recommendations.createRecommendations");
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329
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330 String path = Config.getStringXPath(XPATH_TEMPLATE);
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331
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332 if (path == null) {
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333 path = DEFAULT_TEMPLATE_PATH;
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334 }
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335
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336 path = Config.replaceConfigDir(path);
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337
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338 log.info("Meta data template: " + path);
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339
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340 return createRecommendations(new File(path));
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341 }
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342 }
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343 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org