Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/meta/DataCage.java @ 976:d830c398c8f4

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Improved XPath handling for absent flags. flys-artifacts/trunk@2402 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 25 Jul 2011 14:12:14 +0000
parents 30c85cb33a50
children
rev   line source
950
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1 package de.intevation.flys.artifacts.services.meta;
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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
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6 import java.io.InputStream;
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7 import java.io.IOException;
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8 import java.io.File;
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9
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10 import java.io.FileInputStream;
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12 import java.sql.Connection;
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13 import java.sql.SQLException;
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15 import org.apache.log4j.Logger;
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16
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17 import org.w3c.dom.Document;
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18 import org.w3c.dom.Node;
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20 import org.hibernate.Session;
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22 import org.hibernate.jdbc.Work;
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23
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24 import de.intevation.artifacts.common.utils.Config;
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25 import de.intevation.artifacts.common.utils.XMLUtils;
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27 import de.intevation.flys.artifacts.FLYSArtifact;
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29 import de.intevation.flys.backend.SessionHolder;
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30
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31 import de.intevation.artifactdatabase.data.StateData;
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32
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33
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34 public class DataCage
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35 {
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36 private static Logger log = Logger.getLogger(DataCage.class);
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37
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38 public static final String XPATH_META_DATA_TEMPLATE =
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39 "/artifact-database/metadata/@template";
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40
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41 private static DataCage INSTANCE;
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42
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43 protected Builder builder;
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44
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45 public DataCage() {
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46 }
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47
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48 public DataCage(Builder builder) {
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49 this.builder = builder;
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50 }
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51
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52 public Builder getBuilder() {
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53 return builder;
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54 }
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55
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56 protected static void artifactToParameters(
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57 FLYSArtifact artifact,
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58 Map<String, Object> parameters
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59 ) {
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60 parameters.put("current-state-id", artifact.getCurrentStateId());
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61
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62 for (StateData sd: artifact.getAllData()) {
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63 Object value = sd.getValue();
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64 if (value == null) {
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65 continue;
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66 }
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67 String key = sd.getName().replace('.', '-');
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68 parameters.put(key, value);
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69 }
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70 }
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71
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72 public void recommend(
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73 FLYSArtifact artifact,
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74 String [] outs,
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75 Map<String, Object> extraParameters,
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76 Node result
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77 ) {
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78 Map<String, Object> parameters = new HashMap<String, Object>();
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79
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80 if (extraParameters != null) {
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81 parameters.putAll(extraParameters);
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82 }
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83
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84 if (artifact != null) {
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85 artifactToParameters(artifact, parameters);
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86 }
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87
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88 parameters.put("artifact-outs", outs);
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89
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90 parameters.put("parameters", parameters);
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91
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92 recommend(parameters, result);
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93 }
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94
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95 public void recommend(
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96 final Map<String, Object> parameters,
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97 final Node result
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98 ) {
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99 if (builder == null) {
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100 log.error("builder not configured properly.");
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101 return;
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102 }
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103
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104 Session session = SessionHolder.HOLDER.get();
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105
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106 session.doWork(new Work() {
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107 @Override
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108 public void execute(Connection connection)
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109 throws SQLException
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110 {
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111 builder.build(connection, result, parameters);
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112 }
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113 });
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114 }
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115
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116 public static synchronized DataCage getInstance() {
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117 if (INSTANCE == null) {
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118 INSTANCE = createDataCage();
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119 }
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120 return INSTANCE;
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121 }
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122
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123 protected static Builder createBuilder(File file) {
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124 log.debug("DataCage.createBuilder");
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125
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126 if (!file.isFile() || !file.canRead()) {
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127 log.error("Cannot open template file '" + file + "'");
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128 return null;
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129 }
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130
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131 InputStream in = null;
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132
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133 try {
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134 in = new FileInputStream(file);
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135
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136 Document template = XMLUtils.parseDocument(in);
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137
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138 if (template == null) {
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139 log.error("cannot parse meta data template");
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140 }
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141 else {
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142 return new Builder(template);
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143 }
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144 }
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145 catch (IOException ioe) {
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146 log.error(ioe);
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147 }
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148 finally {
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149 if (in != null) {
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150 try {
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151 in.close();
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152 }
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153 catch (IOException ioe) {
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154 log.error(ioe);
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155 }
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156 }
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157 }
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158 return null;
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159 }
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160
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161 protected static DataCage createDataCage() {
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162 log.debug("DataCage.createDataCage");
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163
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164 String path = Config.getStringXPath(XPATH_META_DATA_TEMPLATE);
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165 if (path == null) {
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166 log.error("no path to template file given");
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167 return null;
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168 }
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169
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170 path = Config.replaceConfigDir(path);
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171
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172 return new DataCage(createBuilder(new File(path)));
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173 }
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174 }
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175 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org