Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/Recommendations.java @ 1046:0a5eff5511b1

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Fixed flys/issue262: Unified user and system datacage template flys-artifacts/trunk@2508 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Fri, 19 Aug 2011 09:48:13 +0000
parents c586b6220f35
children 3ca999f507b7
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
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29 import de.intevation.flys.artifacts.FLYSArtifact;
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30
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31 import de.intevation.flys.backend.SessionHolder;
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32
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33 import de.intevation.artifactdatabase.data.StateData;
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34
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35 import de.intevation.flys.artifacts.datacage.templating.Builder;
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36
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37 public class Recommendations
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38 {
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39 private static Logger log = Logger.getLogger(Recommendations.class);
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40
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41 private static final boolean DEVELOPMENT_MODE =
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42 Boolean.getBoolean("flys.datacage.recommendations.development");
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43
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44 public static final String XPATH_TEMPLATE =
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45 "/artifact-database/metadata/template/text()";
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46
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47 public static final String DEFAULT_TEMPLATE_PATH =
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48 "${artifacts.config.dir}/meta-data.xml";
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49
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50 private static Recommendations INSTANCE;
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51
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52 public static class BuilderProvider
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53 {
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54 protected Builder builder;
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55
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56 public BuilderProvider() {
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57 }
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58
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59 public BuilderProvider(Builder builder) {
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60 this.builder = builder;
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61 }
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62
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63 public Builder getBuilder() {
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64 return builder;
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65 }
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66 } // class BuilderProvider
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67
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68 public static class FileBuilderProvider
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69 extends BuilderProvider
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70 {
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71 protected File file;
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72 protected long lastModified;
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73
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74 public FileBuilderProvider() {
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75 }
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76
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77 public FileBuilderProvider(File file) {
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78 this.file = file;
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79 lastModified = Long.MIN_VALUE;
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80 }
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81
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82 @Override
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83 public synchronized Builder getBuilder() {
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84 long modified = file.lastModified();
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85 if (modified > lastModified) {
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86 lastModified = modified;
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87 try {
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88 Document template = loadTemplate(file);
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89 builder = new Builder(template);
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90 }
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91 catch (IOException ioe) {
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92 log.error(ioe);
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93 }
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94 }
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95 return builder;
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96 }
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97
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98 public BuilderProvider toStaticProvider() {
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99 return new BuilderProvider(builder);
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100 }
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101 } // class BuilderProvider
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102
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103 protected BuilderProvider builderProvider;
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104
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105 public Recommendations() {
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106 }
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107
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108 public Recommendations(BuilderProvider builderProvider) {
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109 this.builderProvider = builderProvider;
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110 }
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111
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112 public Builder getBuilder() {
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113 return builderProvider.getBuilder();
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114 }
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115
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116 protected static void artifactToParameters(
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117 FLYSArtifact artifact,
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118 Map<String, Object> parameters
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119 ) {
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120 parameters.put("current-state-id", artifact.getCurrentStateId());
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121 parameters.put("artifact-id", artifact.identifier());
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122
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123 for (StateData sd: artifact.getAllData()) {
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124 Object value = sd.getValue();
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125 if (value == null) {
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126 continue;
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127 }
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128 String key = sd.getName().replace('.', '-');
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129 parameters.put(key, value);
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130 }
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131 }
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132
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133 public void recommend(
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134 FLYSArtifact artifact,
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135 String userId,
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136 String [] outs,
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137 Map<String, Object> extraParameters,
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138 Node result
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139 ) {
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140 Map<String, Object> parameters = new HashMap<String, Object>();
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141
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142 if (extraParameters != null) {
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143 parameters.putAll(extraParameters);
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144 }
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145
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146 if (userId != null) {
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147 parameters.put("user-id", userId);
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148 }
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149
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150 if (artifact != null) {
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151 artifactToParameters(artifact, parameters);
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152 }
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153
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154 parameters.put("artifact-outs", outs);
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155
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156 parameters.put("parameters", parameters);
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157
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158 recommend(parameters, userId, result);
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159 }
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160
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161 public void recommend(
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162 Map<String, Object> parameters,
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163 String userId,
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164 Node result
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165 ) {
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166 recommend(parameters, userId, result, SessionHolder.HOLDER.get());
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167 }
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168
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169 public void recommend(
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170 final Map<String, Object> parameters,
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171 final String userId,
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172 final Node result,
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173 Session session
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174 ) {
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175 session.doWork(new Work() {
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176 @Override
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177 public void execute(Connection systemConnection)
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178 throws SQLException
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179 {
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180 List<Builder.NamedConnection> connections =
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181 new ArrayList<Builder.NamedConnection>(2);
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182
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183 Connection userConnection = userId != null
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184 ? DBConfig
1015
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185 .getInstance()
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186 .getDBConnection()
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187 .getDataSource()
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188 .getConnection()
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189 : null;
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190
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191 try {
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192 if (userConnection != null) {
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193 connections.add(new Builder.NamedConnection(
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diff changeset
194 Builder.CONNECTION_USER, userConnection, false));
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195 }
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196
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197 connections.add(new Builder.NamedConnection(
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diff changeset
198 Builder.CONNECTION_SYSTEM, systemConnection, true));
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199
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diff changeset
200 getBuilder().build(connections, result, parameters);
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201 }
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diff changeset
202 finally {
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203 if (userConnection != null) {
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204 userConnection.close();
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diff changeset
205 }
1015
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206 }
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diff changeset
207 }
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diff changeset
208 });
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diff changeset
209 }
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210
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211 public static synchronized Recommendations getInstance() {
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212 if (INSTANCE == null) {
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213 INSTANCE = createRecommendations();
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214 }
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215 return INSTANCE;
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diff changeset
216 }
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diff changeset
217
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218 protected static Document loadTemplate(File file) throws IOException {
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diff changeset
219 InputStream in = null;
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diff changeset
220
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diff changeset
221 try {
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222 in = new FileInputStream(file);
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diff changeset
223
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diff changeset
224 Document template = XMLUtils.parseDocument(in);
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diff changeset
225
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diff changeset
226 if (template == null) {
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diff changeset
227 throw new IOException("cannot load template");
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diff changeset
228 }
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diff changeset
229 return template;
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diff changeset
230 }
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diff changeset
231 finally {
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diff changeset
232 if (in != null) {
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parents:
diff changeset
233 try {
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diff changeset
234 in.close();
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diff changeset
235 }
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diff changeset
236 catch (IOException ioe) {
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diff changeset
237 log.error(ioe);
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diff changeset
238 }
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parents:
diff changeset
239 }
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parents:
diff changeset
240 }
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parents:
diff changeset
241 }
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diff changeset
242
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diff changeset
243 public static Recommendations createRecommendations(File file) {
1015
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diff changeset
244 log.debug("Recommendations.createBuilder");
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diff changeset
245
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diff changeset
246 if (!file.isFile() || !file.canRead()) {
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diff changeset
247 log.error("Cannot open template file '" + file + "'");
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248 return null;
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249 }
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diff changeset
250
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0a5eff5511b1 Fixed flys/issue262: Unified user and system datacage template
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diff changeset
251 FileBuilderProvider fbp = new FileBuilderProvider(file);
1015
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diff changeset
252
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diff changeset
253 if (fbp.getBuilder() == null) {
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c586b6220f35 Datacage: Added a development mode for recommendations
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diff changeset
254 log.error("failed loading builder");
1015
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255 return null;
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diff changeset
256 }
1030
c586b6220f35 Datacage: Added a development mode for recommendations
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diff changeset
257
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diff changeset
258 BuilderProvider bp = DEVELOPMENT_MODE
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diff changeset
259 ? fbp
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diff changeset
260 : fbp.toStaticProvider();
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261
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262 return new Recommendations(bp);
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263 }
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264
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265 protected static Recommendations createRecommendations() {
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266 log.debug("Recommendations.createRecommendations");
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267
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268 String path = Config.getStringXPath(XPATH_TEMPLATE);
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269
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270 if (path == null) {
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271 path = DEFAULT_TEMPLATE_PATH;
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272 }
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273
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274 path = Config.replaceConfigDir(path);
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275
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276 log.info("Meta data template: " + path);
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277
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278 return createRecommendations(new File(path));
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279 }
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280 }
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281 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org