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 / AbstractFeatureSet.java @ 43628
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1 | 43089 | 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 | package org.gvsig.fmap.dal.feature.impl.featureset; |
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25 | |||
26 | import org.gvsig.fmap.dal.DataStore; |
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27 | import org.gvsig.fmap.dal.exception.DataException; |
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28 | import org.gvsig.fmap.dal.feature.Feature; |
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29 | import org.gvsig.fmap.dal.feature.FeatureSet; |
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30 | import org.gvsig.fmap.dal.feature.FeatureStore; |
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31 | import org.gvsig.fmap.dal.feature.impl.dynobjectutils.DynObjectSetFeatureSetFacade; |
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32 | import org.gvsig.tools.dispose.DisposableIterator; |
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33 | import org.gvsig.tools.dispose.DisposeUtils; |
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34 | import org.gvsig.tools.dynobject.DynObjectSet; |
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35 | import org.gvsig.tools.exception.BaseException; |
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36 | import org.gvsig.tools.visitor.VisitCanceledException; |
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37 | import org.gvsig.tools.visitor.Visitor; |
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38 | import org.gvsig.tools.visitor.impl.AbstractIndexedVisitable; |
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39 | 43358 | jjdelcerro | import org.slf4j.Logger; |
40 | import org.slf4j.LoggerFactory; |
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41 | 43089 | jjdelcerro | |
42 | |||
43 | public abstract class AbstractFeatureSet |
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44 | extends AbstractIndexedVisitable
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45 | implements FeatureSet {
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46 | |||
47 | 43358 | jjdelcerro | protected static final Logger LOG = LoggerFactory.getLogger(AbstractFeatureSet.class); |
48 | |||
49 | 43089 | jjdelcerro | public abstract FeatureStore getFeatureStore(); |
50 | |||
51 | @Override
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52 | 43358 | jjdelcerro | public final void accept(Visitor visitor, long firstValueIndex, long elements) throws BaseException { |
53 | try {
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54 | doAccept(visitor, firstValueIndex, elements); |
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55 | } catch (VisitCanceledException ex) {
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56 | // The visit has been cancelled by the visitor, so we finish here.
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57 | LOG.debug( |
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58 | "The visit, beggining on position {}, has been cancelled "
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59 | + "by the visitor: {}", new Long(firstValueIndex), |
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60 | visitor); |
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61 | } |
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62 | } |
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63 | |||
64 | @Override
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65 | 43089 | jjdelcerro | protected void doAccept(Visitor visitor, long firstValueIndex) |
66 | throws VisitCanceledException, BaseException {
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67 | 43358 | jjdelcerro | doAccept(visitor, firstValueIndex, 0);
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68 | } |
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69 | |||
70 | protected void doAccept(Visitor visitor, long firstValueIndex, long elements) |
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71 | throws VisitCanceledException, BaseException {
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72 | DisposableIterator iterator = fastIterator(firstValueIndex, elements); |
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73 | |||
74 | try {
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75 | while (iterator.hasNext()) {
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76 | Feature feature = (Feature) iterator.next(); |
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77 | visitor.visit(feature); |
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78 | 43089 | jjdelcerro | } |
79 | 43358 | jjdelcerro | } finally {
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80 | iterator.dispose(); |
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81 | 43089 | jjdelcerro | } |
82 | } |
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83 | 43358 | jjdelcerro | |
84 | 43089 | jjdelcerro | @Override
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85 | public Feature first() {
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86 | DisposableIterator it = null;
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87 | try {
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88 | it = this.iterator();
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89 | if( it == null ) { |
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90 | return null; |
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91 | } |
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92 | Feature f = (Feature) it.next(); |
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93 | return f;
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94 | } finally {
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95 | DisposeUtils.disposeQuietly(it); |
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96 | } |
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97 | } |
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98 | |||
99 | @Override
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100 | public boolean isEmpty() throws DataException { |
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101 | return this.getSize() == 0; |
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102 | } |
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103 | |||
104 | @Override
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105 | public DisposableIterator fastIterator() throws DataException { |
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106 | return this.fastIterator(0); |
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107 | } |
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108 | |||
109 | @Override
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110 | public DisposableIterator iterator() {
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111 | try {
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112 | return this.fastIterator(0); |
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113 | } catch (DataException ex) {
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114 | throw new RuntimeException("Can't obtain itertor.",ex); |
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115 | } |
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116 | } |
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117 | |||
118 | @Override
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119 | public DynObjectSet getDynObjectSet() {
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120 | return this.getDynObjectSet(true); |
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121 | } |
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122 | |||
123 | @Override
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124 | public DynObjectSet getDynObjectSet(boolean fast) { |
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125 | return new DynObjectSetFeatureSetFacade(this, this.getFeatureStore(), fast); |
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126 | } |
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127 | |||
128 | @Override
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129 | public boolean isFromStore(DataStore store) { |
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130 | return this.getFeatureStore().equals(store); |
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131 | } |
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132 | } |