Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/datacage/Recommendations.java @ 5863:4897a58c8746

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River artifacts: Added new copyright headers.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 28 Apr 2013 14:40:59 +0200
parents 5aa05a7a34b7
children 59ff03ff48f1
rev   line source
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4897a58c8746 River artifacts: Added new copyright headers.
Sascha L. Teichmann <teichmann@intevation.de>
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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.FLYSArtifact;
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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
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49
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50 /**
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51 * Also accessible as Singleton with getInstance().
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52 */
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53 public class Recommendations
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54 {
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55 public static final String CONNECTION_USER = "user";
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56 public static final String CONNECTION_SYSTEM = "system";
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57 public static final String CONNECTION_SEDDB = "seddb";
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58
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59 public static final String DEFAULT_CONNECTION_NAME = CONNECTION_SYSTEM;
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60
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61 private static Logger log = Logger.getLogger(Recommendations.class);
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62
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63 private static final boolean DEVELOPMENT_MODE =
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64 Boolean.getBoolean("flys.datacage.recommendations.development");
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65
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66 public static final String XPATH_TEMPLATE =
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67 "/artifact-database/metadata/template/text()";
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68
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69 public static final String DEFAULT_TEMPLATE_PATH =
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70 "${artifacts.config.dir}/meta-data.xml";
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71
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72 private static Recommendations INSTANCE;
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73
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74 public static class BuilderPoolProvider
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75 {
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76 protected BuilderPool builderPool;
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77
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78 public BuilderPoolProvider() {
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79 }
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80
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81 public BuilderPoolProvider(BuilderPool builderPool) {
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82 this.builderPool = builderPool;
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83 }
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84
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85 public BuilderPool getBuilderPool() {
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86 return builderPool;
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87 }
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88 } // class BuilderProvider
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89
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90 public static class FileBuilderPoolProvider
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91 extends BuilderPoolProvider
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92 {
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93 protected File file;
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94 protected long lastModified;
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95
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96 public FileBuilderPoolProvider() {
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97 }
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98
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99 public FileBuilderPoolProvider(File file) {
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100 this.file = file;
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101 lastModified = Long.MIN_VALUE;
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102 }
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103
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104 @Override
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105 public synchronized BuilderPool getBuilderPool() {
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106 long modified = file.lastModified();
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107 if (modified > lastModified) {
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108 lastModified = modified;
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109 try {
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110 Document template = loadTemplate(file);
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111 builderPool = new BuilderPool(template);
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112 }
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113 catch (IOException ioe) {
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114 log.error(ioe);
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115 }
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116 }
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117 return builderPool;
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118 }
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119
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120 public BuilderPoolProvider toStaticProvider() {
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121 return new BuilderPoolProvider(builderPool);
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122 }
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123 } // class BuilderProvider
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124
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125 protected BuilderPoolProvider builderPoolProvider;
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126
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127 public Recommendations() {
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128 }
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129
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130 public Recommendations(BuilderPoolProvider builderPoolProvider) {
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131 this.builderPoolProvider = builderPoolProvider;
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132 }
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133
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134 public BuilderPool getBuilderPool() {
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135 return builderPoolProvider.getBuilderPool();
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136 }
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137
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138 protected static void artifactToParameters(
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139 FLYSArtifact artifact,
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140 Map<String, Object> parameters
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141 ) {
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142 parameters.put("CURRENT-STATE-ID", artifact.getCurrentStateId());
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143 parameters.put("ARTIFACT-ID", artifact.identifier());
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144
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145 for (StateData sd: artifact.getAllData()) {
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146 Object value = sd.getValue();
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147 if (value == null) {
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148 continue;
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149 }
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150 String key = sd.getName().replace('.', '-').toUpperCase();
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151 parameters.put(key, value);
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152 }
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153 }
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154
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155 /**
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156 * Put Key/Values from \param src to \param dst, but uppercase
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157 * both Keys and Values.
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158 */
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159 public static void convertKeysToUpperCase(
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160 Map<String, Object> src,
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161 Map<String, Object> dst
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162 ) {
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163 for (Map.Entry<String, Object> entry: src.entrySet()) {
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164 dst.put(entry.getKey().toUpperCase(), entry.getValue());
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165 }
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166 }
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167
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168
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169 /**
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170 * Append recommendations to \param result.
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171 * @param extraParameters parameters (typicall example: 'recommended')
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172 */
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173 public void recommend(
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174 FLYSArtifact artifact,
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175 String userId,
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176 String [] outs,
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177 Map<String, Object> extraParameters,
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178 Node result
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179 ) {
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180 Map<String, Object> parameters = new HashMap<String, Object>();
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181
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182 if (extraParameters != null) {
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183 convertKeysToUpperCase(extraParameters, parameters);
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184 }
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185
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186 if (userId != null) {
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187 parameters.put("USER-ID", userId);
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188 }
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189
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190 if (artifact != null) {
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191 artifactToParameters(artifact, parameters);
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192 }
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193
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194 parameters.put("ARTIFACT-OUTS", StringUtils.toUpperCase(outs));
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195
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196 parameters.put("PARAMETERS", parameters);
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197
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198 recommend(parameters, userId, result);
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199 }
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200
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201
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202 /**
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203 * Append recommendations to \param result.
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204 */
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205 public void recommend(
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206 Map<String, Object> parameters,
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207 String userId,
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208 Node result
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209 ) {
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210 recommend(parameters, userId, result, SessionHolder.HOLDER.get());
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211 }
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212
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213 public void recommend(
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214 final Map<String, Object> parameters,
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215 final String userId,
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216 final Node result,
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217 Session systemSession
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218 ) {
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219 systemSession.doWork(new Work() {
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220 @Override
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221 public void execute(final Connection systemConnection)
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222 throws SQLException
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223 {
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224 SessionFactory sedDBFactory =
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225 SessionFactoryProvider.getSedDBSessionFactory();
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226
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227 Session sedDBSession = sedDBFactory.openSession();
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228 try {
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229 sedDBSession.doWork(new Work() {
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230 @Override
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231 public void execute(Connection sedDBConnection)
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232 throws SQLException
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233 {
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234 recommend(
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235 parameters, userId, result,
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236 systemConnection,
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237 sedDBConnection);
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238 }
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239 });
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240 }
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241 finally {
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242 sedDBSession.close();
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243 }
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244 }
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245 });
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246 }
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247
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248 public void recommend(
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249 Map<String, Object> parameters,
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250 String userId,
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251 Node result,
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252 Connection systemConnection,
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253 Connection seddbConnection
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254 ) throws SQLException
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255 {
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256 List<Builder.NamedConnection> connections =
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257 new ArrayList<Builder.NamedConnection>(3);
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258
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259 Connection userConnection = userId != null
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260 ? DBConfig
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261 .getInstance()
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262 .getDBConnection()
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263 .getDataSource()
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264 .getConnection()
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265 : null;
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266
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267 try {
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268 connections.add(new Builder.NamedConnection(
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269 CONNECTION_SYSTEM, systemConnection, true));
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270
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271 if (seddbConnection != null) {
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272 connections.add(new Builder.NamedConnection(
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273 CONNECTION_SEDDB, seddbConnection, true));
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274 }
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275
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276 if (userConnection != null) {
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277 connections.add(new Builder.NamedConnection(
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278 CONNECTION_USER, userConnection, false));
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279 }
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280
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281 getBuilderPool().build(connections, result, parameters);
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282 }
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283 finally {
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284 if (userConnection != null) {
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285 userConnection.close();
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286 }
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287 }
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288 }
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289
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290 /** Get singleton instance. */
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291 public static synchronized Recommendations getInstance() {
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292 if (INSTANCE == null) {
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293 INSTANCE = createRecommendations();
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294 }
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295 return INSTANCE;
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296 }
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297
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298
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299 protected static Document loadTemplate(File file) throws IOException {
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300 InputStream in = new FileInputStream(file);
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301
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302 try {
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303 Document template = XMLUtils.parseDocument(in);
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304 if (template == null) {
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305 throw new IOException("cannot load template");
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306 }
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307 return template;
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308 }
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309 finally {
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310 in.close();
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311 }
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312 }
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313
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314 public static Recommendations createRecommendations(File file) {
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315 log.debug("Recommendations.createBuilder");
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316
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317 if (!file.isFile() || !file.canRead()) {
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318 log.error("Cannot open template file '" + file + "'");
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319 return null;
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320 }
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321
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322 FileBuilderPoolProvider fbp = new FileBuilderPoolProvider(file);
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323
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324 if (fbp.getBuilderPool() == null) {
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325 log.error("failed loading builder");
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326 return null;
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327 }
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328
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329 BuilderPoolProvider bp = DEVELOPMENT_MODE
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330 ? fbp
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331 : fbp.toStaticProvider();
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332
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333 return new Recommendations(bp);
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334 }
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335
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336 protected static Recommendations createRecommendations() {
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337 log.debug("Recommendations.createRecommendations");
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338
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339 String path = Config.getStringXPath(XPATH_TEMPLATE);
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340
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341 if (path == null) {
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342 path = DEFAULT_TEMPLATE_PATH;
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343 }
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344
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345 path = Config.replaceConfigDir(path);
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346
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347 log.info("Meta data template: " + path);
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348
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349 return createRecommendations(new File(path));
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350 }
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351 }
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352 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org