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annotate gnv-artifacts/src/main/java/de/intevation/gnv/utils/VectorDataProcessor.java @ 1040:70653c29fc1d

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Finished vector support for timeseriespoints (Issue27). gnv-artifacts/trunk@1112 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Wed, 19 May 2010 14:05:33 +0000
parents
children 9bb1979aabbe
rev   line source
1040
70653c29fc1d Finished vector support for timeseriespoints (Issue27).
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1 package de.intevation.gnv.utils;
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2
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3 import de.intevation.gnv.geobackend.base.DefaultResult;
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4 import de.intevation.gnv.geobackend.base.DefaultResultDescriptor;
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5 import de.intevation.gnv.geobackend.base.Result;
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6 import de.intevation.gnv.geobackend.base.ResultDescriptor;
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7
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8 import java.util.ArrayList;
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9 import java.util.Collection;
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10 import java.util.HashMap;
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11 import java.util.Iterator;
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12 import java.util.List;
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13 import java.util.Map;
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14
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15 import org.apache.log4j.Logger;
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16
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17 /**
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18 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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19 */
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20 public final class VectorDataProcessor {
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21
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22 private static Logger logger = Logger.getLogger(VectorDataProcessor.class);
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23
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24 public static final String[] COLUMNS = {
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25 "YORDINATE", "XORDINATE", "GROUP1", "GROUP2", "GROUP3", "GAPID", "SERIES"
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26 };
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27
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28 public static Collection<Result> process(Collection<Result> input) {
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29 logger.info("Process vector data (" + input.size() + " items)");
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30
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31 ResultDescriptor outDescriptor = initResultDescriptor();
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32 ResultDescriptor inDescriptor = null;
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33 int[] inIndices = null;
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34 int columns = -1;
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35
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36 Map series = new HashMap();
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37
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38 // for each result of the incoming result
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39 for (Result result: input) {
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40 if (inDescriptor == null || inIndices == null) {
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41 inDescriptor = result.getResultDescriptor();
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42 inIndices = inDescriptor.getColumnIndices(COLUMNS);
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43 columns = inDescriptor.getColumnCount();
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44 }
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45
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46 // for each column of the incoming result object
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47 for (int i = 0; i < columns; i++) {
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48 String name = inDescriptor.getColumnName(i);
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49
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50 if (!StringUtils.contains(COLUMNS, name)) {
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51 List list = (List) series.get(name);
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52 if (list == null)
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53 list = new ArrayList();
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54
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55 Result out = new DefaultResult(outDescriptor);
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56 Object value = result.getObject(i);
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57
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58 // skipp results that have no data value
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59 if (value == null)
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60 continue;
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61
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62 out.addColumnValue(0, value);
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63
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64 // add meta data to result object
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65 // TODO: Maybe we could do this one single time, because the
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66 // TODO: meta data will not change
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67 for (int j = 1; j < inIndices.length -1; j++) {
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68 out.addColumnValue(j, result.getObject(inIndices[j]));
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69 }
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70
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71 // add the name of the component to distinguish between
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72 // different series later in the chart creation
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73 out.addColumnValue(inIndices.length-1, name);
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74
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75 list.add(out);
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76 series.put(name, list);
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77 }
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78 }
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79 }
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80
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81 // finally, we put all lists together
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82 Iterator iter = series.values().iterator();
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83 List output = new ArrayList();
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84 while (iter.hasNext()) {
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85 output.addAll((Collection)iter.next());
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86 }
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87
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88 logger.info("Data processing created " + output.size() + " elements.");
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89 return output;
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90 }
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91
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92
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93 public static ResultDescriptor initResultDescriptor() {
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94 logger.debug("Init ResultDescriptor for outgoing results.");
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95
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96 ResultDescriptor desc = new DefaultResultDescriptor();
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97
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98 for (String name: COLUMNS) {
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99 desc.addColumn(name, "java.lang.String");
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100 }
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101
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102 logger.debug("Outgoing ResultDescriptor has " + desc.getColumnCount() +
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103 " columns");
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104 return desc;
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105 }
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106 }
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107 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org