svn-gvsig-desktop / trunk / extensions / extSymbology / src / org / gvsig / symbology / fmap / drivers / featureiterators / FeatureSelectionIterator.java @ 30110
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1 | 20768 | jdominguez | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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2 | *
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3 | * Copyright (C) 2005 IVER T.I. and Generalitat Valenciana.
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4 | *
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5 | * This program is free software; you can redistribute it and/or
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6 | * modify it under the terms of the GNU General Public License
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7 | * as published by the Free Software Foundation; either version 2
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8 | * of the License, or (at your option) any later version.
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9 | *
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10 | * This program is distributed in the hope that it will be useful,
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 | * GNU General Public License for more details.
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14 | *
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15 | * You should have received a copy of the GNU General Public License
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16 | * along with this program; if not, write to the Free Software
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17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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18 | *
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19 | * For more information, contact:
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20 | *
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21 | * Generalitat Valenciana
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22 | * Conselleria d'Infraestructures i Transport
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23 | * Av. Blasco Ib??ez, 50
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24 | * 46010 VALENCIA
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25 | * SPAIN
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26 | *
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27 | * +34 963862235
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28 | * gvsig@gva.es
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29 | * www.gvsig.gva.es
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30 | *
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31 | * or
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32 | *
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33 | * IVER T.I. S.A
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34 | * Salamanca 50
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35 | * 46005 Valencia
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36 | * Spain
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37 | *
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38 | * +34 963163400
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39 | * dac@iver.es
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40 | */
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41 | package org.gvsig.symbology.fmap.drivers.featureiterators; |
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42 | |||
43 | import org.cresques.cts.IProjection; |
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44 | |||
45 | import com.hardcode.gdbms.driver.exceptions.ReadDriverException; |
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46 | import com.hardcode.gdbms.engine.values.Value; |
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47 | import com.iver.cit.gvsig.exceptions.expansionfile.ExpansionFileReadException; |
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48 | import com.iver.cit.gvsig.fmap.core.DefaultFeature; |
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49 | import com.iver.cit.gvsig.fmap.core.IFeature; |
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50 | import com.iver.cit.gvsig.fmap.core.IGeometry; |
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51 | import com.iver.cit.gvsig.fmap.drivers.featureiterators.DefaultFeatureIterator; |
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52 | import com.iver.cit.gvsig.fmap.layers.FBitSet; |
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53 | import com.iver.cit.gvsig.fmap.layers.ReadableVectorial; |
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54 | |||
55 | /**
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56 | *
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57 | * Iterates over the selected features of a layer.
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58 | *
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59 | * @author Alvaro Zabala
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60 | *
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61 | */
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62 | public class FeatureSelectionIterator extends DefaultFeatureIterator { |
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63 | |||
64 | |||
65 | FBitSet selection; |
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66 | |||
67 | public FeatureSelectionIterator(ReadableVectorial source,
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68 | IProjection sourceProj, |
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69 | IProjection targetProj, |
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70 | String[] fieldNames) |
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71 | throws ReadDriverException {
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72 | super(source, sourceProj, targetProj, fieldNames);
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73 | selection = this.source.getRecordset().getSelection();
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74 | this.currentFeature = selection.nextSetBit(0); |
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75 | } |
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76 | |||
77 | public FeatureSelectionIterator(ReadableVectorial source)
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78 | throws ReadDriverException {
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79 | super(source);
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80 | } |
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81 | |||
82 | public boolean hasNext() throws ReadDriverException { |
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83 | return currentFeature != -1; |
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84 | } |
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85 | |||
86 | public IFeature next() throws ReadDriverException { |
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87 | try {
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88 | 30110 | jpiera | IGeometry geom = chekIfCloned(source.getShape(currentFeature)); |
89 | 20768 | jdominguez | reprojectIfNecessary(geom); |
90 | Value[] regAtt = getValues(currentFeature);
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91 | IFeature feat = new DefaultFeature(geom, regAtt, currentFeature + ""); |
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92 | currentFeature = selection.nextSetBit(currentFeature + 1);
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93 | return feat;
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94 | } catch (ExpansionFileReadException e) {
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95 | throw new ReadDriverException("",e); |
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96 | } |
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97 | } |
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98 | |||
99 | } |