Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/datacage/Recommendations.java @ 6553:e89e5163973f

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Typo in doc fix.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 10 Jul 2013 11:37:00 +0200
parents 25230bc3137c
children 468d9ebda4ce
rev   line source
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.artifacts.datacage;
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10
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11 import java.util.Map;
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12 import java.util.HashMap;
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13 import java.util.List;
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14 import java.util.ArrayList;
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15
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16 import java.io.InputStream;
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17 import java.io.IOException;
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18 import java.io.File;
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19
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20 import java.io.FileInputStream;
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21
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22 import java.sql.Connection;
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23 import java.sql.SQLException;
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24
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25 import org.apache.log4j.Logger;
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26
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27 import org.w3c.dom.Document;
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28 import org.w3c.dom.Node;
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29
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30 import org.hibernate.Session;
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31 import org.hibernate.SessionFactory;
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32
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33 import org.hibernate.jdbc.Work;
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34
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35 import org.dive4elements.artifacts.common.utils.Config;
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36 import org.dive4elements.artifacts.common.utils.XMLUtils;
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37 import org.dive4elements.artifacts.common.utils.StringUtils;
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38
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39 import org.dive4elements.river.artifacts.D4EArtifact;
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40
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41 import org.dive4elements.river.backend.SessionFactoryProvider;
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42 import org.dive4elements.river.backend.SessionHolder;
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43
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44 import org.dive4elements.artifactdatabase.data.StateData;
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45
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46 import org.dive4elements.river.artifacts.datacage.templating.Builder;
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47 import org.dive4elements.river.artifacts.datacage.templating.BuilderPool;
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48 import org.dive4elements.river.artifacts.model.OfficialLineFinder;
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49
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50
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51 /**
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52 * Also accessible as Singleton with getInstance().
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53 */
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54 public class Recommendations
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55 {
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56 public static final String CONNECTION_USER = "user";
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57 public static final String CONNECTION_SYSTEM = "system";
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58 public static final String CONNECTION_SEDDB = "seddb";
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59
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60 public static final String DEFAULT_CONNECTION_NAME = CONNECTION_SYSTEM;
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61
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62 private static Logger log = Logger.getLogger(Recommendations.class);
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63
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64 private static final boolean DEVELOPMENT_MODE =
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65 Boolean.getBoolean("flys.datacage.recommendations.development");
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66
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67 public static final String XPATH_TEMPLATE =
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68 "/artifact-database/metadata/template/text()";
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69
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70 public static final String DEFAULT_TEMPLATE_PATH =
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71 "${artifacts.config.dir}/meta-data.xml";
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72
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73 private static Recommendations INSTANCE;
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74
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75 public static class BuilderPoolProvider
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76 {
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77 protected BuilderPool builderPool;
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78
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79 public BuilderPoolProvider() {
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80 }
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81
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82 public BuilderPoolProvider(BuilderPool builderPool) {
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83 this.builderPool = builderPool;
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84 }
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85
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86 public BuilderPool getBuilderPool() {
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87 return builderPool;
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88 }
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89 } // class BuilderProvider
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90
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91 public static class FileBuilderPoolProvider
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92 extends BuilderPoolProvider
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93 {
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94 protected File file;
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95 protected long lastModified;
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96
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97 public FileBuilderPoolProvider() {
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98 }
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99
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100 public FileBuilderPoolProvider(File file) {
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101 this.file = file;
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102 lastModified = Long.MIN_VALUE;
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103 }
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104
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105 @Override
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106 public synchronized BuilderPool getBuilderPool() {
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107 long modified = file.lastModified();
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108 if (modified > lastModified) {
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109 lastModified = modified;
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110 try {
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111 Document template = loadTemplate(file);
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112 builderPool = new BuilderPool(template);
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113 }
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114 catch (IOException ioe) {
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115 log.error(ioe);
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116 }
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117 }
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118 return builderPool;
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119 }
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120
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121 public BuilderPoolProvider toStaticProvider() {
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122 return new BuilderPoolProvider(builderPool);
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123 }
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124 } // class BuilderProvider
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125
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126 protected BuilderPoolProvider builderPoolProvider;
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127
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128 public Recommendations() {
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129 }
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130
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131 public Recommendations(BuilderPoolProvider builderPoolProvider) {
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132 this.builderPoolProvider = builderPoolProvider;
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133 }
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134
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135 public BuilderPool getBuilderPool() {
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136 return builderPoolProvider.getBuilderPool();
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137 }
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138
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139 protected static void artifactToParameters(
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140 D4EArtifact artifact,
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141 Map<String, Object> parameters
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142 ) {
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143 parameters.put("CURRENT-STATE-ID", artifact.getCurrentStateId());
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144 parameters.put("ARTIFACT-ID", artifact.identifier());
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145
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146 for (StateData sd: artifact.getAllData()) {
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147 Object value = sd.getValue();
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148 if (value == null) {
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149 continue;
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150 }
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151 String key = sd.getName().replace('.', '-').toUpperCase();
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152 parameters.put(key, value);
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153 }
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154
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155 // XXX: THIS IS THE HACK TO BRING THE OFFICIAL LINES INTO THE DATACAGE!
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156 parameters.put(
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157 "OFFICIAL-LINES", OfficialLineFinder.findOfficialLines(artifact));
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158 }
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159
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160 /**
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161 * Put Key/Values from \param src to \param dst, but uppercase
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162 * both Keys and Values.
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163 */
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164 public static void convertKeysToUpperCase(
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165 Map<String, Object> src,
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166 Map<String, Object> dst
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167 ) {
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168 for (Map.Entry<String, Object> entry: src.entrySet()) {
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169 dst.put(entry.getKey().toUpperCase(), entry.getValue());
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170 }
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171 }
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172
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173
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174 /**
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175 * Append recommendations to \param result.
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176 * @param extraParameters parameters (typical example: 'recommended')
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177 */
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178 public void recommend(
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179 D4EArtifact artifact,
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180 String userId,
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181 String [] outs,
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182 Map<String, Object> extraParameters,
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183 Node result
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184 ) {
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185 Map<String, Object> parameters = new HashMap<String, Object>();
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186
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187 if (extraParameters != null) {
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188 convertKeysToUpperCase(extraParameters, parameters);
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189 }
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190
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191 if (userId != null) {
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192 parameters.put("USER-ID", userId);
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193 }
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194
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195 if (artifact != null) {
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196 artifactToParameters(artifact, parameters);
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197 }
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198
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199 parameters.put("ARTIFACT-OUTS", StringUtils.toUpperCase(outs));
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200
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201 parameters.put("PARAMETERS", parameters);
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202
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203 recommend(parameters, userId, result);
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204 }
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205
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206
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207 /**
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208 * Append recommendations to \param result.
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209 */
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210 public void recommend(
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211 Map<String, Object> parameters,
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212 String userId,
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213 Node result
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214 ) {
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215 recommend(parameters, userId, result, SessionHolder.HOLDER.get());
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216 }
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217
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218 public void recommend(
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219 final Map<String, Object> parameters,
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220 final String userId,
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221 final Node result,
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222 Session systemSession
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223 ) {
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224 systemSession.doWork(new Work() {
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225 @Override
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226 public void execute(final Connection systemConnection)
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227 throws SQLException
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228 {
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229 SessionFactory sedDBFactory =
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230 SessionFactoryProvider.getSedDBSessionFactory();
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231
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232 Session sedDBSession = sedDBFactory.openSession();
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233 try {
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234 sedDBSession.doWork(new Work() {
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235 @Override
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236 public void execute(Connection sedDBConnection)
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237 throws SQLException
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238 {
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239 recommend(
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240 parameters, userId, result,
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241 systemConnection,
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242 sedDBConnection);
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243 }
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244 });
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245 }
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246 finally {
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247 sedDBSession.close();
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248 }
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249 }
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250 });
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251 }
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252
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253 public void recommend(
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254 Map<String, Object> parameters,
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255 String userId,
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256 Node result,
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257 Connection systemConnection,
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258 Connection seddbConnection
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259 ) throws SQLException
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260 {
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261 List<Builder.NamedConnection> connections =
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262 new ArrayList<Builder.NamedConnection>(3);
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263
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264 Connection userConnection = userId != null
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265 || parameters.containsKey("ARTIFACT-ID")
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266 ? DBConfig
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267 .getInstance()
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268 .getDBConnection()
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269 .getDataSource()
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270 .getConnection()
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271 : null;
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272
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273 try {
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274 connections.add(new Builder.NamedConnection(
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275 CONNECTION_SYSTEM, systemConnection, true));
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276
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277 if (seddbConnection != null) {
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278 connections.add(new Builder.NamedConnection(
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279 CONNECTION_SEDDB, seddbConnection, true));
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280 }
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281
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282 if (userConnection != null) {
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283 connections.add(new Builder.NamedConnection(
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284 CONNECTION_USER, userConnection, false));
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285 }
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286
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287 getBuilderPool().build(connections, result, parameters);
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288 }
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289 finally {
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290 if (userConnection != null) {
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291 userConnection.close();
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292 }
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293 }
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294 }
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295
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296 /** Get singleton instance. */
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297 public static synchronized Recommendations getInstance() {
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298 if (INSTANCE == null) {
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299 INSTANCE = createRecommendations();
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300 }
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301 return INSTANCE;
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302 }
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303
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304
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305 protected static Document loadTemplate(File file) throws IOException {
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306 InputStream in = new FileInputStream(file);
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307
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308 try {
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309 Document template = XMLUtils.parseDocument(in);
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310 if (template == null) {
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311 throw new IOException("cannot load template");
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312 }
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313 return template;
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314 }
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315 finally {
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316 in.close();
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317 }
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318 }
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319
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320 public static Recommendations createRecommendations(File file) {
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321 log.debug("Recommendations.createBuilder");
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322
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323 if (!file.isFile() || !file.canRead()) {
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324 log.error("Cannot open template file '" + file + "'");
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325 return null;
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326 }
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327
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328 FileBuilderPoolProvider fbp = new FileBuilderPoolProvider(file);
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329
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330 if (fbp.getBuilderPool() == null) {
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331 log.error("failed loading builder");
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332 return null;
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333 }
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334
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335 BuilderPoolProvider bp = DEVELOPMENT_MODE
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336 ? fbp
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337 : fbp.toStaticProvider();
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338
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339 return new Recommendations(bp);
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340 }
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341
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342 protected static Recommendations createRecommendations() {
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343 log.debug("Recommendations.createRecommendations");
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344
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345 String path = Config.getStringXPath(XPATH_TEMPLATE);
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346
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347 if (path == null) {
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348 path = DEFAULT_TEMPLATE_PATH;
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349 }
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350
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351 path = Config.replaceConfigDir(path);
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352
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353 log.info("Meta data template: " + path);
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354
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diff changeset
355 return createRecommendations(new File(path));
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356 }
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357 }
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358 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org