Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/Recommendations.java @ 3037:6093781582b9

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Minor doc. flys-artifacts/trunk@4606 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 06 Jun 2012 11:52:23 +0000
parents 3ca999f507b7
children 5642a83420f2
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 public class Recommendations
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39 {
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40 private static Logger log = Logger.getLogger(Recommendations.class);
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41
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42 private static final boolean DEVELOPMENT_MODE =
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43 Boolean.getBoolean("flys.datacage.recommendations.development");
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44
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45 public static final String XPATH_TEMPLATE =
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46 "/artifact-database/metadata/template/text()";
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47
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48 public static final String DEFAULT_TEMPLATE_PATH =
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49 "${artifacts.config.dir}/meta-data.xml";
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50
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51 private static Recommendations INSTANCE;
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52
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53 public static class BuilderProvider
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54 {
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55 protected Builder builder;
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56
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57 public BuilderProvider() {
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58 }
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59
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60 public BuilderProvider(Builder builder) {
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61 this.builder = builder;
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62 }
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63
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64 public Builder getBuilder() {
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65 return builder;
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66 }
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67 } // class BuilderProvider
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68
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69 public static class FileBuilderProvider
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70 extends BuilderProvider
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71 {
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72 protected File file;
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73 protected long lastModified;
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74
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75 public FileBuilderProvider() {
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76 }
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77
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78 public FileBuilderProvider(File file) {
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79 this.file = file;
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80 lastModified = Long.MIN_VALUE;
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81 }
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82
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83 @Override
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84 public synchronized Builder getBuilder() {
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85 long modified = file.lastModified();
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86 if (modified > lastModified) {
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87 lastModified = modified;
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88 try {
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89 Document template = loadTemplate(file);
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90 builder = new Builder(template);
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91 }
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92 catch (IOException ioe) {
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93 log.error(ioe);
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94 }
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95 }
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96 return builder;
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97 }
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98
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99 public BuilderProvider toStaticProvider() {
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100 return new BuilderProvider(builder);
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101 }
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102 } // class BuilderProvider
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103
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104 protected BuilderProvider builderProvider;
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105
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106 public Recommendations() {
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107 }
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108
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109 public Recommendations(BuilderProvider builderProvider) {
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110 this.builderProvider = builderProvider;
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111 }
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112
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113 public Builder getBuilder() {
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114 return builderProvider.getBuilder();
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115 }
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116
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117 protected static void artifactToParameters(
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118 FLYSArtifact artifact,
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119 Map<String, Object> parameters
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120 ) {
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121 parameters.put("CURRENT-STATE-ID", artifact.getCurrentStateId());
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122 parameters.put("ARTIFACT-ID", artifact.identifier());
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123
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124 for (StateData sd: artifact.getAllData()) {
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125 Object value = sd.getValue();
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126 if (value == null) {
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127 continue;
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128 }
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129 String key = sd.getName().replace('.', '-').toUpperCase();
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130 parameters.put(key, value);
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131 }
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132 }
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133
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134 public static void convertKeysToUpperCase(
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135 Map<String, Object> src,
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136 Map<String, Object> dst
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137 ) {
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138 for (Map.Entry<String, Object> entry: src.entrySet()) {
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139 dst.put(entry.getKey().toUpperCase(), entry.getValue());
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140 }
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141 }
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142
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143 public void recommend(
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144 FLYSArtifact artifact,
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145 String userId,
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146 String [] outs,
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147 Map<String, Object> extraParameters,
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148 Node result
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149 ) {
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150 Map<String, Object> parameters = new HashMap<String, Object>();
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151
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152 if (extraParameters != null) {
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153 convertKeysToUpperCase(extraParameters, parameters);
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154 }
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155
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156 if (userId != null) {
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157 parameters.put("USER-ID", userId);
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158 }
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159
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160 if (artifact != null) {
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161 artifactToParameters(artifact, parameters);
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162 }
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163
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164 parameters.put("ARTIFACT-OUTS", StringUtils.toUpperCase(outs));
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165
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166 parameters.put("PARAMETERS", parameters);
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167
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168 recommend(parameters, userId, result);
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169 }
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170
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171 public void recommend(
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172 Map<String, Object> parameters,
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173 String userId,
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174 Node result
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175 ) {
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176 recommend(parameters, userId, result, SessionHolder.HOLDER.get());
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177 }
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178
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179 public void recommend(
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180 final Map<String, Object> parameters,
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181 final String userId,
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182 final Node result,
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183 Session session
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184 ) {
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185 session.doWork(new Work() {
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186 @Override
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187 public void execute(Connection systemConnection)
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188 throws SQLException
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189 {
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190 List<Builder.NamedConnection> connections =
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191 new ArrayList<Builder.NamedConnection>(2);
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192
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193 Connection userConnection = userId != null
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194 ? DBConfig
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195 .getInstance()
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196 .getDBConnection()
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197 .getDataSource()
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198 .getConnection()
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199 : null;
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200
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diff changeset
201 try {
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202 if (userConnection != null) {
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203 connections.add(new Builder.NamedConnection(
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930a9ce24294 Datacage: Fixed caching issue leading to incorrect results.
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parents: 1018
diff changeset
204 Builder.CONNECTION_USER, userConnection, false));
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diff changeset
205 }
1015
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206
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207 connections.add(new Builder.NamedConnection(
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parents: 1018
diff changeset
208 Builder.CONNECTION_SYSTEM, systemConnection, true));
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209
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diff changeset
210 getBuilder().build(connections, result, parameters);
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211 }
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diff changeset
212 finally {
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diff changeset
213 if (userConnection != null) {
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diff changeset
214 userConnection.close();
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diff changeset
215 }
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216 }
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217 }
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diff changeset
218 });
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219 }
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220
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221 public static synchronized Recommendations getInstance() {
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222 if (INSTANCE == null) {
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223 INSTANCE = createRecommendations();
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224 }
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225 return INSTANCE;
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226 }
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diff changeset
227
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228 protected static Document loadTemplate(File file) throws IOException {
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229 InputStream in = null;
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diff changeset
230
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diff changeset
231 try {
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232 in = new FileInputStream(file);
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diff changeset
233
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diff changeset
234 Document template = XMLUtils.parseDocument(in);
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diff changeset
235
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diff changeset
236 if (template == null) {
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diff changeset
237 throw new IOException("cannot load template");
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diff changeset
238 }
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diff changeset
239 return template;
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diff changeset
240 }
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diff changeset
241 finally {
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diff changeset
242 if (in != null) {
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parents:
diff changeset
243 try {
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diff changeset
244 in.close();
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diff changeset
245 }
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diff changeset
246 catch (IOException ioe) {
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diff changeset
247 log.error(ioe);
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diff changeset
248 }
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diff changeset
249 }
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diff changeset
250 }
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parents:
diff changeset
251 }
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diff changeset
252
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diff changeset
253 public static Recommendations createRecommendations(File file) {
1015
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diff changeset
254 log.debug("Recommendations.createBuilder");
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diff changeset
255
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diff changeset
256 if (!file.isFile() || !file.canRead()) {
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diff changeset
257 log.error("Cannot open template file '" + file + "'");
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258 return null;
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259 }
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260
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261 FileBuilderProvider fbp = new FileBuilderProvider(file);
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262
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263 if (fbp.getBuilder() == null) {
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264 log.error("failed loading builder");
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265 return null;
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266 }
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267
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268 BuilderProvider bp = DEVELOPMENT_MODE
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269 ? fbp
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270 : fbp.toStaticProvider();
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271
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272 return new Recommendations(bp);
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273 }
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274
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275 protected static Recommendations createRecommendations() {
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276 log.debug("Recommendations.createRecommendations");
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277
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278 String path = Config.getStringXPath(XPATH_TEMPLATE);
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279
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280 if (path == null) {
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281 path = DEFAULT_TEMPLATE_PATH;
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282 }
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283
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284 path = Config.replaceConfigDir(path);
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285
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286 log.info("Meta data template: " + path);
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287
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288 return createRecommendations(new File(path));
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289 }
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290 }
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291 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org