Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/meta/DataCage.java @ 960:92027887775a

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DataCage: Added a recommend() method to generate recommendations for a given artifact, outs and extra parameters. flys-artifacts/trunk@2379 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Wed, 20 Jul 2011 17:03:00 +0000
parents 22bc87a42a0d
children f48cef242e7f
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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11
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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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19 import org.hibernate.Session;
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20
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21 import org.hibernate.jdbc.Work;
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22
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23 import de.intevation.artifacts.common.utils.Config;
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24 import de.intevation.artifacts.common.utils.XMLUtils;
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26 import de.intevation.flys.artifacts.FLYSArtifact;
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27
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28 import de.intevation.flys.backend.SessionHolder;
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29
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30 import de.intevation.artifactdatabase.data.StateData;
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31
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32
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33 public class DataCage
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34 {
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35 private static Logger log = Logger.getLogger(DataCage.class);
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36
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37 public static final String XPATH_META_DATA_TEMPLATE =
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38 "/artifact-database/metadata/@template";
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39
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40 private static DataCage INSTANCE;
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41
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42 protected Builder builder;
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43
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44 public DataCage() {
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45 }
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46
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47 public DataCage(Builder builder) {
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48 this.builder = builder;
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49 }
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50
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51 public Builder getBuilder() {
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52 return builder;
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53 }
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54
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55 public Document recommend(FLYSArtifact artifact, String [] outs) {
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56 return recommend(artifact, outs, null);
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57 }
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58
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59 public Document recommend(
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60 FLYSArtifact artifact,
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61 String [] outs,
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62 Map<String, Object> extraParameters
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63 ) {
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64 Map<String, Object> parameters = new HashMap<String, Object>();
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65
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66 if (extraParameters != null) {
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67 parameters.putAll(extraParameters);
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68 }
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69
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70 parameters.put("current-state-id", artifact.getCurrentStateId());
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71 parameters.put("artifact-outs", outs);
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72
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73 for (StateData sd: artifact.getAllData()) {
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74 Object value = sd.getValue();
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75 if (value == null) {
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76 continue;
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77 }
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78 String key = sd.getName().replace('.', '-');
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79 parameters.put(key, value);
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80 }
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81
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82 return process(parameters);
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83 }
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84
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85 public Document process(final Map<String, Object> parameters) {
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86 final Document result = XMLUtils.newDocument();
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87
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88 if (builder != null) {
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89 log.error("builder not configured properly.");
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90 return result;
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91 }
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92
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93 Session session = SessionHolder.HOLDER.get();
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94
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95 session.doWork(new Work() {
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96 @Override
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97 public void execute(Connection connection)
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98 throws SQLException
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99 {
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100 builder.build(connection, result, parameters);
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101 }
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102 });
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103
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104 return result;
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105 }
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106
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107 public static synchronized DataCage getInstance() {
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108 if (INSTANCE == null) {
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109 INSTANCE = createDataCage();
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110 }
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111 return INSTANCE;
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112 }
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113
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114 protected static Builder createBuilder(File file) {
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115 log.debug("DataCage.createBuilder");
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116
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117 if (!file.isFile() || !file.canRead()) {
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118 log.error("Cannot open template file '" + file + "'");
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119 return null;
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120 }
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121
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122 InputStream in = null;
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123
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124 try {
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125 in = new FileInputStream(file);
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126
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127 Document template = XMLUtils.parseDocument(in);
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128
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129 if (template == null) {
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130 log.error("cannot parse meta data template");
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131 }
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132 else {
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133 return new Builder(template);
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134 }
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135 }
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136 catch (IOException ioe) {
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137 log.error(ioe);
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138 }
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139 finally {
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140 if (in != null) {
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141 try {
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142 in.close();
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143 }
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144 catch (IOException ioe) {
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145 log.error(ioe);
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146 }
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147 }
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148 }
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149 return null;
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150 }
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151
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152 protected static DataCage createDataCage() {
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153 log.debug("DataCage.createDataCage");
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154
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155 String path = Config.getStringXPath(XPATH_META_DATA_TEMPLATE);
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156 if (path == null) {
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157 log.error("no path to template file given");
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158 return null;
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159 }
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160
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161 path = Config.replaceConfigDir(path);
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162
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163 return new DataCage(createBuilder(new File(path)));
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164 }
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165 }
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166 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org