Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/Recommendations.java @ 4709:e50d78334246

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Documentation.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 19 Dec 2012 11:40:56 +0100
parents cbd0fafcb26b
children ac48ab9e1715
rev   line source
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1 package de.intevation.flys.artifacts.datacage;
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2
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3 import java.util.Map;
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4 import java.util.HashMap;
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5 import java.util.List;
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6 import java.util.ArrayList;
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7
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8 import java.io.InputStream;
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9 import java.io.IOException;
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10 import java.io.File;
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11
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12 import java.io.FileInputStream;
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13
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14 import java.sql.Connection;
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15 import java.sql.SQLException;
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16
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17 import org.apache.log4j.Logger;
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18
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19 import org.w3c.dom.Document;
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20 import org.w3c.dom.Node;
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21
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22 import org.hibernate.Session;
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23
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24 import org.hibernate.jdbc.Work;
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25
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26 import de.intevation.artifacts.common.utils.Config;
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27 import de.intevation.artifacts.common.utils.XMLUtils;
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28 import de.intevation.artifacts.common.utils.StringUtils;
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29
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30 import de.intevation.flys.artifacts.FLYSArtifact;
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31
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32 import de.intevation.flys.backend.SessionHolder;
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33
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34 import de.intevation.artifactdatabase.data.StateData;
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35
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36 import de.intevation.flys.artifacts.datacage.templating.Builder;
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37
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38
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39 /**
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40 * Also accessible as Singleton with getInstance().
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41 */
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42 public class Recommendations
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43 {
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44 private static Logger log = Logger.getLogger(Recommendations.class);
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45
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46 private static final boolean DEVELOPMENT_MODE =
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47 Boolean.getBoolean("flys.datacage.recommendations.development");
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48
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49 public static final String XPATH_TEMPLATE =
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50 "/artifact-database/metadata/template/text()";
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51
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52 public static final String DEFAULT_TEMPLATE_PATH =
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53 "${artifacts.config.dir}/meta-data.xml";
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54
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55 private static Recommendations INSTANCE;
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56
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57 public static class BuilderProvider
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58 {
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59 protected Builder builder;
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60
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61 public BuilderProvider() {
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62 }
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63
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64 public BuilderProvider(Builder builder) {
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65 this.builder = builder;
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66 }
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67
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68 public Builder getBuilder() {
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69 return builder;
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70 }
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71 } // class BuilderProvider
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72
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73 public static class FileBuilderProvider
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74 extends BuilderProvider
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75 {
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76 protected File file;
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77 protected long lastModified;
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78
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79 public FileBuilderProvider() {
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80 }
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81
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82 public FileBuilderProvider(File file) {
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83 this.file = file;
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84 lastModified = Long.MIN_VALUE;
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85 }
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86
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87 @Override
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88 public synchronized Builder getBuilder() {
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89 long modified = file.lastModified();
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90 if (modified > lastModified) {
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91 lastModified = modified;
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92 try {
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93 Document template = loadTemplate(file);
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94 builder = new Builder(template);
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95 }
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96 catch (IOException ioe) {
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97 log.error(ioe);
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98 }
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99 }
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100 return builder;
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101 }
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102
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103 public BuilderProvider toStaticProvider() {
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104 return new BuilderProvider(builder);
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105 }
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106 } // class BuilderProvider
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107
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108 protected BuilderProvider builderProvider;
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109
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110 public Recommendations() {
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111 }
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112
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113 public Recommendations(BuilderProvider builderProvider) {
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114 this.builderProvider = builderProvider;
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115 }
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116
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117 public Builder getBuilder() {
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118 return builderProvider.getBuilder();
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119 }
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120
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121 protected static void artifactToParameters(
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122 FLYSArtifact artifact,
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123 Map<String, Object> parameters
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124 ) {
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125 parameters.put("CURRENT-STATE-ID", artifact.getCurrentStateId());
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126 parameters.put("ARTIFACT-ID", artifact.identifier());
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127
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128 for (StateData sd: artifact.getAllData()) {
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129 Object value = sd.getValue();
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130 if (value == null) {
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131 continue;
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132 }
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133 String key = sd.getName().replace('.', '-').toUpperCase();
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134 parameters.put(key, value);
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135 }
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136 }
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137
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138
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139 /**
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140 * Put Key/Values from \param src to \param dst, but uppercase
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141 * both Keys and Values.
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142 */
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143 public static void convertKeysToUpperCase(
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144 Map<String, Object> src,
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145 Map<String, Object> dst
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146 ) {
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147 for (Map.Entry<String, Object> entry: src.entrySet()) {
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148 dst.put(entry.getKey().toUpperCase(), entry.getValue());
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149 }
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150 }
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151
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152
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153 /**
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154 * Append recommendations to \param result.
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155 * @param extraParameters parameters (typicall example: 'recommended')
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156 */
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157 public void recommend(
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158 FLYSArtifact artifact,
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159 String userId,
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160 String [] outs,
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161 Map<String, Object> extraParameters,
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162 Node result
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163 ) {
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164 Map<String, Object> parameters = new HashMap<String, Object>();
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165
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166 if (extraParameters != null) {
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167 convertKeysToUpperCase(extraParameters, parameters);
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168 }
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169
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170 if (userId != null) {
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171 parameters.put("USER-ID", userId);
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172 }
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173
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174 if (artifact != null) {
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175 artifactToParameters(artifact, parameters);
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176 }
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177
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178 parameters.put("ARTIFACT-OUTS", StringUtils.toUpperCase(outs));
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179
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180 parameters.put("PARAMETERS", parameters);
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181
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182 recommend(parameters, userId, result);
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183 }
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184
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185
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186 /**
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187 * Append recommendations to \param result.
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188 */
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189 public void recommend(
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190 Map<String, Object> parameters,
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191 String userId,
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192 Node result
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193 ) {
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194 recommend(parameters, userId, result, SessionHolder.HOLDER.get());
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195 }
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196
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197 public void recommend(
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198 final Map<String, Object> parameters,
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199 final String userId,
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200 final Node result,
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201 Session session
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202 ) {
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203 session.doWork(new Work() {
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204 @Override
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205 public void execute(Connection systemConnection)
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206 throws SQLException
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207 {
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208 List<Builder.NamedConnection> connections =
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209 new ArrayList<Builder.NamedConnection>(2);
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210
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parents: 1030
diff changeset
211 Connection userConnection = userId != null
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diff changeset
212 ? DBConfig
1015
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213 .getInstance()
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214 .getDBConnection()
1046
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parents: 1030
diff changeset
215 .getDataSource()
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parents: 1030
diff changeset
216 .getConnection()
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parents: 1030
diff changeset
217 : null;
1015
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218
1046
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parents: 1030
diff changeset
219 try {
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parents: 1030
diff changeset
220 if (userConnection != null) {
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diff changeset
221 connections.add(new Builder.NamedConnection(
1022
930a9ce24294 Datacage: Fixed caching issue leading to incorrect results.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1018
diff changeset
222 Builder.CONNECTION_USER, userConnection, false));
1046
0a5eff5511b1 Fixed flys/issue262: Unified user and system datacage template
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parents: 1030
diff changeset
223 }
1015
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parents:
diff changeset
224
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225 connections.add(new Builder.NamedConnection(
1022
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1018
diff changeset
226 Builder.CONNECTION_SYSTEM, systemConnection, true));
1015
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diff changeset
227
1046
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parents: 1030
diff changeset
228 getBuilder().build(connections, result, parameters);
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parents: 1030
diff changeset
229 }
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parents: 1030
diff changeset
230 finally {
0a5eff5511b1 Fixed flys/issue262: Unified user and system datacage template
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parents: 1030
diff changeset
231 if (userConnection != null) {
0a5eff5511b1 Fixed flys/issue262: Unified user and system datacage template
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parents: 1030
diff changeset
232 userConnection.close();
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parents: 1030
diff changeset
233 }
1015
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234 }
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parents:
diff changeset
235 }
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parents:
diff changeset
236 });
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parents:
diff changeset
237 }
9a1a3080ad98 Bring user specific meta data service to life.
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parents:
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238
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239
2b3c4abe034f Doc, TODO added.
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parents: 3076
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240 /** Get singleton instance. */
1015
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diff changeset
241 public static synchronized Recommendations getInstance() {
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parents:
diff changeset
242 if (INSTANCE == null) {
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parents:
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243 INSTANCE = createRecommendations();
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parents:
diff changeset
244 }
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parents:
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245 return INSTANCE;
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parents:
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246 }
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parents:
diff changeset
247
3391
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parents: 3076
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248
1015
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249 protected static Document loadTemplate(File file) throws IOException {
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parents:
diff changeset
250 InputStream in = null;
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parents:
diff changeset
251
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parents:
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252 try {
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253 in = new FileInputStream(file);
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parents:
diff changeset
254
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parents:
diff changeset
255 Document template = XMLUtils.parseDocument(in);
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parents:
diff changeset
256
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parents:
diff changeset
257 if (template == null) {
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parents:
diff changeset
258 throw new IOException("cannot load template");
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parents:
diff changeset
259 }
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parents:
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260 return template;
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parents:
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261 }
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262 finally {
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263 if (in != null) {
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264 try {
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265 in.close();
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266 }
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267 catch (IOException ioe) {
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268 log.error(ioe);
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269 }
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270 }
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271 }
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272 }
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273
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274 public static Recommendations createRecommendations(File file) {
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275 log.debug("Recommendations.createBuilder");
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276
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277 if (!file.isFile() || !file.canRead()) {
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278 log.error("Cannot open template file '" + file + "'");
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279 return null;
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280 }
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281
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282 FileBuilderProvider fbp = new FileBuilderProvider(file);
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283
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284 if (fbp.getBuilder() == null) {
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285 log.error("failed loading builder");
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286 return null;
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287 }
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288
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289 BuilderProvider bp = DEVELOPMENT_MODE
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290 ? fbp
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291 : fbp.toStaticProvider();
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292
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293 return new Recommendations(bp);
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294 }
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295
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296 protected static Recommendations createRecommendations() {
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297 log.debug("Recommendations.createRecommendations");
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298
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299 String path = Config.getStringXPath(XPATH_TEMPLATE);
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300
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301 if (path == null) {
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302 path = DEFAULT_TEMPLATE_PATH;
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303 }
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304
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305 path = Config.replaceConfigDir(path);
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306
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307 log.info("Meta data template: " + path);
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308
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309 return createRecommendations(new File(path));
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310 }
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311 }
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312 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org