Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/Recommendations.java @ 4655:cd44d28d0fbc

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Move the access to artifact data to the Access object Use BedHeightAccess class to receive the data from the artifact. This abstracts the data access from the actual artifact.
author Björn Ricks <bjoern.ricks@intevation.de>
date Tue, 11 Dec 2012 09:44:04 +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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parents: 1030
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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parents: 1018
diff changeset
226 Builder.CONNECTION_SYSTEM, systemConnection, true));
1015
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diff changeset
227
1046
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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) {
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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 });
9a1a3080ad98 Bring user specific meta data service to life.
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parents:
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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
diff changeset
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:
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247
3391
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248
1015
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249 protected static Document loadTemplate(File file) throws IOException {
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parents:
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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:
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254
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parents:
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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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258 throw new IOException("cannot load template");
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parents:
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259 }
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parents:
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260 return template;
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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