Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/exports/ODVExport.java @ 800:db5b04ecb426

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ISSUE215: Improved ODV-Export. now all Columns which have identical values but different Parameters will be merged to one row. gnv-artifacts/trunk@882 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Tue, 06 Apr 2010 13:07:11 +0000
parents d0967fdee36f
children 41a7c49b5cb4
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
765
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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 * Constructor
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36 * @param collector DataCollector used to extract the required data.
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37 * @param parameters A collection of parameters to be displayed in the
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38 * export.
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39 */
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40 public ODVExport(DataCollector collector, Collection parameters) {
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41 super(collector);
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42 this.parameters = parameters;
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43 }
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44
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45 /**
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46 * @see de.intevation.gnv.exports.Export#writeData(Profile, Collection,
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47 * CSVWriter)
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48 */
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49 @Override
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50 protected void writeData(Profile profile, Collection result,
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51 CSVWriter writer) throws StateException {
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52 Iterator<Result> it = result.iterator();
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53
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54 String[] header = profile.getHeader();
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55 ArrayList<String> headerList = new ArrayList<String>();
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56 for (int i= 0; i < header.length; i++){
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57 headerList.add(header[i]);
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58 }
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59 ArrayList<String> paramids = new ArrayList<String>();
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60
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61 Map<StringArrayKey, Map<String,String>> aggregatedRows = new HashMap<StringArrayKey, Map<String,String>>();
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62
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63 String currentParameterID = "N/N";
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64
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65 while (it.hasNext()) {
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66 Result res = it.next();
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67
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68 String[] value = collector.getData(res);
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69 StringArrayKey key = new StringArrayKey(value);
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70 String parameterValue = res.getString("DATAVALUE");
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71 String parameterID = res.getString("PARAMETER");
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72
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73 if (!currentParameterID.equals(parameterID)){
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74 paramids.add(parameterID);
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75 headerList.add(this.findParamTitle(parameters, parameterID));
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76 headerList.add("QF");
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77 currentParameterID = parameterID;
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78 }
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79
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80 Map<String,String> aggregatedRow = aggregatedRows.get(key);
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81 if (aggregatedRow!= null){
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82 aggregatedRow.put(parameterID, parameterValue);
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83 }else{
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84 Map<String,String> params = new HashMap<String, String>();
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85 params.put(parameterID, parameterValue);
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86 aggregatedRows.put(key, params);
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87 }
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88 }
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89
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90 if (header != null){
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91 writer.writeNext(headerList.toArray(header));
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92 }
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93
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94 Iterator<StringArrayKey> rows = aggregatedRows.keySet().iterator();
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95 while (rows.hasNext()){
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96 StringArrayKey row = rows.next();
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97 Map<String,String> params = aggregatedRows.get(row);
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98 ArrayList<String> rowList = new ArrayList<String>();
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99 String[] rowArray = row.getValue();
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100 for (int i= 0; i < rowArray.length; i++){
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101 rowList.add(rowArray[i]);
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102 }
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103 for (int i = 0; i < paramids.size();i++){
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104 String key = paramids.get(i);
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105 String value = params.get(key);
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106 if (value == null){
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107 value = "";
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108 }
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109 rowList.add(value);
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110 rowList.add("1");
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111 }
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112 writer.writeNext(rowList.toArray(rowArray));
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113 }
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114 }
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115
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116 /**
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117 * This method is used to search specific value coresponding to its key
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118 * <code>id</code> and return its description.
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119 *
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120 * @param values Collection of parameters.
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121 * @param id Key used to find the value.
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122 *
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123 * @return Description of searched value.
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124 */
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125 protected String findParamTitle(Collection values, String id) {
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126 log.debug("find description of dataset");
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127
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128 if (values != null){
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129 Iterator it = values.iterator();
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130 while (it.hasNext()) {
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131 KeyValueDescibeData data = (KeyValueDescibeData) it.next();
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132
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133 if (id.equals(data.getKey()))
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134 return data.getValue();
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135 }
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136 }
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137 return "";
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138 }
778
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139
765
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140
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141 }
771
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142 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org