Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/exports/ODVExport.java @ 1058:2b4f1c095468

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Fixed the aggregation of row with the same parameter in the odv export (issue291). gnv-artifacts/trunk@1136 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 28 May 2010 07:37:59 +0000
parents 2423cefe7d39
children f953c9a559d8
rev   line source
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1 package de.intevation.gnv.exports;
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2
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3 import java.util.ArrayList;
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4 import java.util.Collection;
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5 import java.util.HashMap;
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6 import java.util.Iterator;
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7 import java.util.Map;
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8
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9 import org.apache.log4j.Logger;
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10
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11 import au.com.bytecode.opencsv.CSVWriter;
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12 import de.intevation.gnv.geobackend.base.Result;
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13 import de.intevation.gnv.state.describedata.KeyValueDescibeData;
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14 import de.intevation.gnv.state.exception.StateException;
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15
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16 /**
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17 * This class is used to create a specific export document which is similar to
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18 * an CSV document.
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19 *
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20 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
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21 */
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22 public class ODVExport extends DefaultExport {
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23
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24 /**
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25 * Logger used for logging via log4j.
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26 */
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27 private static Logger log = Logger.getLogger(ODVExport.class);
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29 /**
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30 * Collection of parameters.
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31 */
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32 private Collection parameters = null;
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33
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34 /**
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35 * The TimeStime which should be integrated in the Export to mark a
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36 * TimeSeries.
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37 */
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38 private String startTime = null;
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39
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40 /**
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41 * Constructor
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42 * @param collector DataCollector used to extract the required data.
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43 * @param parameters A collection of parameters to be displayed in the
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44 * export.
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45 * @param startTime The TimeStamp which should ne integrated in the export
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46 * to mark a TimeSeries. If it should not be a TimeSeries this Value must
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47 * be null.
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48 */
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49 public ODVExport(DataCollector collector, Collection parameters, String startTime) {
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50 super(collector);
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51 this.parameters = parameters;
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52 this.startTime = startTime;
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53 }
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54
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55
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56 @Override
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57 protected void writeData(
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58 Profile profile, Collection result, CSVWriter writer
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59 )throws StateException
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60 {
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61 Iterator<Result> it = result.iterator();
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62 log.debug("Put " + result.size() + " elements into odv export.");
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63
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64 String[] header = profile.getHeader();
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65 ArrayList<String> headerList = new ArrayList<String>();
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66 for (int i= 0; i < header.length; i++){
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67 headerList.add(header[i]);
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68 }
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69
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70 if (this.startTime != null){
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71 headerList.add("time_ISO8601");
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72 }
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73 ArrayList<String> paramids = new ArrayList<String>();
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74
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75 Map<StringArrayKey, Map<String,String>> aggregatedRows =
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76 new HashMap<StringArrayKey, Map<String,String>>();
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77
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78 while (it.hasNext()) {
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79 Result res = it.next();
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80
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81 String[] value = collector.getData(res);
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82 StringArrayKey key = new StringArrayKey(value);
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83 String parameterValue = res.getString("DATAVALUE");
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84 String parameterID = res.getString("PARAMETER");
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85
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86 if (!paramids.contains(parameterID)){
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87 paramids.add(parameterID);
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88 headerList.add(findParamTitle(parameters, parameterID));
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89 headerList.add("QF");
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90 }
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91
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92 Map<String,String> aggregatedRow = aggregatedRows.get(key);
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93 if (aggregatedRow!= null){
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94 aggregatedRow.put(parameterID, parameterValue);
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95 }
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96 else{
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97 Map<String,String> params = new HashMap<String, String>();
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98 params.put(parameterID, parameterValue);
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99 aggregatedRows.put(key, params);
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100 }
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101 }
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102
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103 if (header != null){
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104 writer.writeNext(headerList.toArray(header));
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105 }
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106
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107 Iterator<StringArrayKey> rows = aggregatedRows.keySet().iterator();
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108 while (rows.hasNext()){
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109 StringArrayKey row = rows.next();
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110 Map<String,String> params = aggregatedRows.get(row);
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111 ArrayList<String> rowList = new ArrayList<String>();
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112 String[] rowArray = row.getValue();
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113 for (int i= 0; i < rowArray.length; i++){
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114 rowList.add(rowArray[i]);
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115 }
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116 if (this.startTime != null){
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117 String measurementtime = rowList.get(3).replace(' ','T');
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118 rowList.set(3, this.startTime.replace('.','-'));
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119 rowList.add(measurementtime+":00.0");
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120 }
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121 for (int i = 0; i < paramids.size();i++){
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122 String key = paramids.get(i);
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123 String value = params.get(key);
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124 if (value == null){
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125 value = "";
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126 }
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127 rowList.add(value);
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128 rowList.add("1");
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129 }
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130 writer.writeNext(rowList.toArray(rowArray));
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131 }
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132 }
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133
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134 /**
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135 * This method is used to search specific value coresponding to its key
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136 * <code>id</code> and return its description.
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137 *
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138 * @param values Collection of parameters.
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139 * @param id Key used to find the value.
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140 *
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141 * @return Description of searched value.
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142 */
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143 protected String findParamTitle(Collection values, String id) {
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144 log.debug("find description of dataset");
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145
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146 if (values != null){
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147 Iterator it = values.iterator();
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148 while (it.hasNext()) {
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149 KeyValueDescibeData data = (KeyValueDescibeData) it.next();
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150
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151 if (id.equals(data.getKey()))
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152 return data.getValue();
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153 }
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154 }
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155 return "";
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156 }
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157
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158
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159 }
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160 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org