svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.impl / src / main / java / org / gvsig / fmap / dal / feature / impl / featureset / FastDefaultIterator.java
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1 | 40559 | jjdelcerro | /**
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2 | * gvSIG. Desktop Geographic Information System.
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3 | *
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4 | * Copyright (C) 2007-2013 gvSIG Association.
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5 | *
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6 | * This program is free software; you can redistribute it and/or
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7 | * modify it under the terms of the GNU General Public License
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8 | * as published by the Free Software Foundation; either version 3
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9 | * of the License, or (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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19 | * MA 02110-1301, USA.
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20 | *
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21 | * For any additional information, do not hesitate to contact us
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22 | * at info AT gvsig.com, or visit our website www.gvsig.com.
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23 | */
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24 | 40435 | jjdelcerro | package org.gvsig.fmap.dal.feature.impl.featureset; |
25 | |||
26 | import org.gvsig.fmap.dal.exception.DataException; |
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27 | import org.gvsig.fmap.dal.feature.impl.DefaultFeature; |
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28 | import org.gvsig.fmap.dal.feature.spi.FeatureProvider; |
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29 | 46505 | fdiaz | import org.gvsig.tools.dispose.DisposeUtils; |
30 | 40435 | jjdelcerro | import org.gvsig.tools.exception.BaseException; |
31 | |||
32 | public class FastDefaultIterator extends DefaultIterator { |
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33 | |||
34 | DefaultFeature myFeature; |
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35 | |||
36 | 43358 | jjdelcerro | public FastDefaultIterator(DefaultFeatureSet featureSet, long index, long elements) |
37 | 40435 | jjdelcerro | throws DataException {
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38 | super(featureSet);
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39 | 46505 | fdiaz | try{
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40 | this.initializeFeature();
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41 | if (index > 0 || elements>0 ) { |
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42 | if (featureSet.provider.canIterateFromIndex()) {
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43 | try {
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44 | this.iterator = featureSet.provider.fastIterator(index,elements);
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45 | } catch (UnsupportedOperationException e) { |
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46 | this.iterator = featureSet.provider.fastIterator();
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47 | skypto(index); |
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48 | } |
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49 | } else {
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50 | this.iterator = featureSet.provider.fastIterator();
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51 | skypto(index); |
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52 | } |
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53 | } else {
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54 | this.iterator = featureSet.provider.fastIterator();
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55 | } |
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56 | } catch (Throwable t) { |
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57 | DisposeUtils.dispose(this.fset);
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58 | DisposeUtils.dispose(this);
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59 | throw t;
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60 | } |
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61 | 40435 | jjdelcerro | |
62 | } |
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63 | |||
64 | protected DefaultFeature createFeature(FeatureProvider fData)
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65 | throws DataException {
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66 | fData.setNew(false);
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67 | this.myFeature.setData(fData);
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68 | |||
69 | if (this.fset.transform.isEmpty()) { |
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70 | return myFeature;
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71 | } else {
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72 | return (DefaultFeature) this.fset.transform.applyTransform( |
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73 | myFeature, fset |
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74 | .getDefaultFeatureType()); |
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75 | } |
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76 | } |
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77 | |||
78 | protected void initializeFeature() { |
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79 | myFeature = new DefaultFeature(fset.store);
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80 | } |
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81 | |||
82 | public void remove() { |
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83 | super.remove();
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84 | this.initializeFeature();
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85 | } |
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86 | |||
87 | protected void doDispose() throws BaseException { |
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88 | super.doDispose();
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89 | myFeature = null;
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90 | } |
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91 | |||
92 | } |