svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.api / src / main / java / org / gvsig / fmap / dal / feature / FeatureSet.java @ 47049
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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; |
25 | |||
26 | import java.util.List; |
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27 | 44655 | jjdelcerro | import javax.json.JsonArray; |
28 | 45696 | jjdelcerro | import javax.json.JsonArrayBuilder; |
29 | 47049 | jjdelcerro | import org.gvsig.expressionevaluator.Expression; |
30 | 40435 | jjdelcerro | import org.gvsig.fmap.dal.DataSet; |
31 | 47049 | jjdelcerro | import org.gvsig.fmap.dal.DataStore; |
32 | 40435 | jjdelcerro | import org.gvsig.fmap.dal.exception.DataException; |
33 | 47049 | jjdelcerro | import static org.gvsig.fmap.dal.feature.DisposableFeatureSetIterable.EMPTY_DISPOSABLE_FEATURE_SET_ITERABLE; |
34 | import org.gvsig.json.Json; |
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35 | 40435 | jjdelcerro | import org.gvsig.tools.dispose.DisposableIterator; |
36 | 47049 | jjdelcerro | import static org.gvsig.tools.dispose.DisposableIterator.EMPTY_DISPOSABLE_ITERATOR; |
37 | 40435 | jjdelcerro | import org.gvsig.tools.dynobject.DynObject; |
38 | import org.gvsig.tools.dynobject.DynObjectSet; |
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39 | 47049 | jjdelcerro | import static org.gvsig.tools.dynobject.DynObjectSet.EMPTY_DYNOBJECTSET; |
40 | 40435 | jjdelcerro | import org.gvsig.tools.exception.BaseException; |
41 | 45425 | jjdelcerro | import org.gvsig.tools.util.IsEmpty; |
42 | 44390 | jjdelcerro | import org.gvsig.tools.util.Size; |
43 | import org.gvsig.tools.util.Size64; |
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44 | 40435 | jjdelcerro | import org.gvsig.tools.visitor.IndexedVisitable; |
45 | import org.gvsig.tools.visitor.Visitor; |
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46 | |||
47 | /**
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48 | * A FeatureSet represents a set of {@link Feature}(s). These sets of features
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49 | * are typically obtained directly from a {@link FeatureStore}, or through a
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50 | * {@link FeatureQuery}.
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51 | 45541 | fdiaz | *
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52 | 40435 | jjdelcerro | * A FeatureSet may contain subsets of {@link Feature}(s) of different
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53 | * {@link FeatureType}(s). It allows iterating and editing the features.
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54 | 45541 | fdiaz | *
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55 | 40435 | jjdelcerro | * FIXME: Actualizar javadoc
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56 | 45541 | fdiaz | *
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57 | 40435 | jjdelcerro | * Si el store en el que esta basado el featureset es modificado, se realiza un
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58 | * update, insert, delete o se modifican los featuretype de este, el FeatureSet
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59 | * quedara invalidado, y cualquier acceso a el provocara que se lance una
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60 | * excepcion de tiempo de ejecucion ConcurrentModificationException.
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61 | 45541 | fdiaz | *
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62 | 40435 | jjdelcerro | * Habria que indicar que invocar al metodo accept del interface visitor
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63 | * provocara la excepcion ConcurrentModificationException si el store a sido
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64 | * modificado desde otro punto.
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65 | 45541 | fdiaz | *
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66 | 40435 | jjdelcerro | * Indicar que los metodos insert/delete/update ademas de actuar sobre el set,
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67 | * actuan sobre el store en el que este esta basado, pero que no invalidan el
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68 | * set sobre el que se ejecutan. No se si esto deberia hacerse mencion en esos
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69 | * metodos o en la doc general del featureset.
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70 | 45541 | fdiaz | *
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71 | 40435 | jjdelcerro | */
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72 | 45425 | jjdelcerro | public interface FeatureSet extends DataSet, Size64, Size, IsEmpty, IndexedVisitable, Iterable<Feature> { |
73 | 45541 | fdiaz | |
74 | 47049 | jjdelcerro | public static FeatureSet EMPTY_FEATURESET = new FeatureSet() { |
75 | @Override
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76 | public FeatureType getDefaultFeatureType() {
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77 | return null; |
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78 | } |
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79 | 46672 | fdiaz | |
80 | 47049 | jjdelcerro | @Override
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81 | public List getFeatureTypes() { |
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82 | return null; |
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83 | } |
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84 | 46672 | fdiaz | |
85 | 47049 | jjdelcerro | @Override
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86 | public long getSize() throws DataException { |
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87 | return 0; |
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88 | } |
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89 | 46672 | fdiaz | |
90 | 47049 | jjdelcerro | @Override
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91 | public DisposableIterator iterator(long index) throws DataException { |
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92 | return EMPTY_DISPOSABLE_ITERATOR;
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93 | } |
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94 | 46672 | fdiaz | |
95 | 47049 | jjdelcerro | @Override
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96 | public DisposableIterator iterator(long index, long elements) throws DataException { |
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97 | return EMPTY_DISPOSABLE_ITERATOR;
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98 | } |
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99 | 46672 | fdiaz | |
100 | 47049 | jjdelcerro | @Override
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101 | public DisposableFeatureSetIterable iterable() {
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102 | return EMPTY_DISPOSABLE_FEATURE_SET_ITERABLE;
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103 | } |
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104 | 46672 | fdiaz | |
105 | 47049 | jjdelcerro | @Override
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106 | public DisposableFeatureSetIterable iterable(boolean disposeFeatureSet) { |
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107 | return EMPTY_DISPOSABLE_FEATURE_SET_ITERABLE;
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108 | } |
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109 | |||
110 | @Override
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111 | public DisposableIterator fastIterator() throws DataException { |
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112 | return EMPTY_DISPOSABLE_ITERATOR;
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113 | } |
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114 | |||
115 | @Override
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116 | public DisposableIterator fastIterator(long index) throws DataException { |
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117 | return EMPTY_DISPOSABLE_ITERATOR;
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118 | } |
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119 | |||
120 | @Override
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121 | public DisposableIterator fastIterator(long index, long elemets) throws DataException { |
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122 | return EMPTY_DISPOSABLE_ITERATOR;
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123 | } |
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124 | |||
125 | @Override
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126 | public Feature first() {
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127 | return null; |
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128 | } |
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129 | |||
130 | @Override
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131 | public void update(EditableFeature feature) throws DataException { |
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132 | } |
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133 | |||
134 | @Override
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135 | public void commitChanges() throws DataException { |
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136 | } |
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137 | |||
138 | @Override
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139 | public void delete(Feature feature) throws DataException { |
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140 | } |
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141 | |||
142 | @Override
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143 | public void insert(EditableFeature feature) throws DataException { |
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144 | } |
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145 | |||
146 | @Override
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147 | public DynObjectSet getDynObjectSet() {
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148 | return EMPTY_DYNOBJECTSET;
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149 | } |
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150 | |||
151 | @Override
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152 | public DynObjectSet getDynObjectSet(boolean fast) { |
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153 | return EMPTY_DYNOBJECTSET;
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154 | } |
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155 | |||
156 | @Override
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157 | public void accept(Visitor visitor, long firstValueIndex) throws BaseException { |
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158 | } |
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159 | |||
160 | @Override
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161 | public void accept(Visitor visitor, long firstValueIndex, long elements) throws BaseException { |
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162 | } |
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163 | |||
164 | @Override
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165 | public FeatureStore getFeatureStore() {
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166 | return null; |
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167 | } |
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168 | |||
169 | @Override
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170 | public JsonArray toJSON() {
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171 | return toJson();
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172 | } |
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173 | |||
174 | @Override
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175 | public JsonArray toJson() {
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176 | return Json.createArrayBuilder().build();
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177 | } |
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178 | |||
179 | @Override
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180 | public JsonArrayBuilder toJsonBuilder() {
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181 | return Json.createArrayBuilder();
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182 | } |
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183 | |||
184 | @Override
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185 | public boolean isFromStore(DataStore store) { |
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186 | return false; |
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187 | } |
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188 | |||
189 | @Override
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190 | public void accept(Visitor visitor) throws BaseException { |
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191 | } |
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192 | |||
193 | @Override
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194 | public void dispose() { |
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195 | // Do nothing
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196 | } |
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197 | |||
198 | @Override
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199 | public long size64() { |
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200 | return 0; |
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201 | } |
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202 | |||
203 | @Override
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204 | public int size() { |
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205 | return 0; |
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206 | } |
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207 | |||
208 | @Override
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209 | public boolean isEmpty() { |
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210 | return true; |
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211 | } |
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212 | |||
213 | @Override
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214 | public DisposableIterator<Feature> iterator() {
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215 | return EMPTY_DISPOSABLE_ITERATOR;
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216 | } |
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217 | |||
218 | @Override
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219 | public Expression makeFilter(int maxfeatures) { |
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220 | return null; |
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221 | } |
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222 | 46672 | fdiaz | |
223 | 47049 | jjdelcerro | }; |
224 | |||
225 | 45541 | fdiaz | /**
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226 | * Returns the default {@link FeatureType} of this FeatureSet.
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227 | *
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228 | * @return default {@link FeatureType} in this FeatureSet.
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229 | */
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230 | public FeatureType getDefaultFeatureType();
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231 | 40435 | jjdelcerro | |
232 | 45541 | fdiaz | /**
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233 | * Returns a list of the {@link FeatureType}(s) in this FeatureSet.
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234 | *
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235 | * @return list of the {@link FeatureType}(s) in this FeatureSet.
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236 | */
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237 | public List getFeatureTypes(); |
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238 | 40435 | jjdelcerro | |
239 | 45541 | fdiaz | /**
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240 | * Returns the number of {@link Feature}(s) contained in this FeatureSet.
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241 | *
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242 | * The value returned by this method won't be accurate when the FeatureStore
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243 | * is being edited and this set's features are modified, added or deleted.
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244 | *
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245 | * @return number of {@link Feature}(s) contained in this FeatureSet.
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246 | *
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247 | * @throws DataException
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248 | */
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249 | 40435 | jjdelcerro | public long getSize() throws DataException; |
250 | |||
251 | /**
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252 | * Returns an iterator over the elements in this collection, in the order
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253 | * (if any) defined when the collection was obtained.
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254 | 45541 | fdiaz | *
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255 | 40435 | jjdelcerro | * The iterator starts at the specified position in this collection. The
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256 | * specified index indicates the first element that would be returned by an
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257 | * initial call to the <tt>next</tt> method. An initial call to the
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258 | * <tt>previous</tt> method would return the element with the specified
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259 | * index minus one.
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260 | 45541 | fdiaz | *
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261 | 40435 | jjdelcerro | * <p>
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262 | * <em>
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263 | * <strong>NOTE:</strong> if you use this method to get the iterator, you
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264 | * must get sure the iterator is disposed (@see
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265 | 45541 | fdiaz | * {@link DisposableIterator#dispose()}) in any case, even if an error
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266 | * occurs while getting the data. It is recommended to use the
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267 | * <code>accept</code> methods instead, which handle everything for you.
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268 | * Take into account the accept methods may use a fast iterator to get the
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269 | * features.
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270 | 40435 | jjdelcerro | * </em>
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271 | * </p>
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272 | 45541 | fdiaz | *
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273 | 40435 | jjdelcerro | * @see #accept(org.gvsig.tools.visitor.Visitor)
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274 | * @see #accept(org.gvsig.tools.visitor.Visitor, long)
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275 | * @see #fastIterator()
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276 | * @see #fastIterator(long)
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277 | 45541 | fdiaz | *
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278 | * @param index index of first element to be returned from the iterator (by
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279 | * a call to the <tt>next</tt> method).
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280 | 40435 | jjdelcerro | * @return an iterator of the elements in this collection (in proper
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281 | 45541 | fdiaz | * sequence), starting at the specified position in the collection.
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282 | * @throws DataException if the index is out of range (index < 0 || index
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283 | * > size()).
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284 | 40435 | jjdelcerro | * @deprecated use {@link #fastIterator(long)} instead
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285 | */
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286 | 45541 | fdiaz | DisposableIterator iterator(long index) throws DataException; |
287 | 40435 | jjdelcerro | |
288 | 43358 | jjdelcerro | DisposableIterator iterator(long index, long elements) throws DataException; |
289 | |||
290 | 40435 | jjdelcerro | /**
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291 | * Returns an iterator over the elements in this collection, in the order
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292 | * (if any) defined when the collection was obtained.
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293 | 45541 | fdiaz | *
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294 | 40435 | jjdelcerro | * @see #accept(org.gvsig.tools.visitor.Visitor)
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295 | * @see #accept(org.gvsig.tools.visitor.Visitor, long)
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296 | * @see #fastIterator()
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297 | * @see #fastIterator(long)
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298 | 45541 | fdiaz | *
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299 | 40435 | jjdelcerro | * @return an iterator of the elements in this collection (in proper
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300 | 45541 | fdiaz | * sequence).
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301 | *
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302 | 42535 | jjdelcerro | * @deprecated use fastiterator. In next versions the signature of this
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303 | 43358 | jjdelcerro | * method will be changed to "Iterator<Feature> iterator()".
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304 | 40435 | jjdelcerro | */
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305 | 45541 | fdiaz | @Override
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306 | DisposableIterator iterator(); |
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307 | 40435 | jjdelcerro | |
308 | 45541 | fdiaz | DisposableFeatureSetIterable iterable(); |
309 | |||
310 | DisposableFeatureSetIterable iterable(boolean disposeFeatureSet);
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311 | |||
312 | 40435 | jjdelcerro | /**
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313 | * Returns a fast iterator over this set.
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314 | * <p>
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315 | * Fast in this case means that each of the elements returned may be a
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316 | * reused or pooled object instance, so don't use it to be stored in any
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317 | * way.
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318 | * </p>
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319 | * <p>
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320 | * If you need to store one of the {@link Feature} of the iterator, use the
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321 | * {@link Feature#getCopy()} to create a clone of the object.
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322 | * </p>
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323 | 45541 | fdiaz | *
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324 | 40435 | jjdelcerro | * <p>
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325 | * <em>
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326 | * <strong>NOTE:</strong> if you use this method to get the iterator, you
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327 | * must get sure the iterator is disposed (@see
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328 | 45541 | fdiaz | * {@link DisposableIterator#dispose()}) in any case, even if an error
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329 | * occurs while getting the data. It is recommended to use the
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330 | * <code>accept</code> methods instead, which handle everything for you.
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331 | * Take into account the accept methods may use a fast iterator to get the
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332 | * features.
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333 | 40435 | jjdelcerro | * </em>
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334 | * </p>
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335 | 45541 | fdiaz | *
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336 | 40435 | jjdelcerro | * @see #accept(org.gvsig.tools.visitor.Visitor)
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337 | * @see #accept(org.gvsig.tools.visitor.Visitor, long)
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338 | 45541 | fdiaz | *
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339 | 40435 | jjdelcerro | * @return an iterator over this set.
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340 | 45541 | fdiaz | *
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341 | 40435 | jjdelcerro | * @throws DataException
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342 | */
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343 | 45541 | fdiaz | public DisposableIterator fastIterator() throws DataException; |
344 | 40435 | jjdelcerro | |
345 | /**
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346 | * Returns a fast iterator over this set, starting from the given index.
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347 | * <p>
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348 | * Fast in this case means that each of the elements returned may be a
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349 | * reused or pooled object instance, so don't use it to be stored in any
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350 | * way.
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351 | * </p>
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352 | * <p>
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353 | * If you need to store one of the {@link Feature} of the iterator, use the
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354 | * {@link Feature#getCopy()} to create a clone of the object.
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355 | * </p>
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356 | 45541 | fdiaz | *
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357 | 40435 | jjdelcerro | * <p>
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358 | * <em>
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359 | * <strong>NOTE:</strong> if you use this method to get the iterator, you
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360 | * must get sure the iterator is disposed (@see
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361 | 45541 | fdiaz | * {@link DisposableIterator#dispose()}) in any case, even if an error
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362 | * occurs while getting the data. It is recommended to use the
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363 | * <code>accept</code> methods instead, which handle everything for you.
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364 | * Take into account the accept methods may use a fast iterator to get the
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365 | * features.
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366 | 40435 | jjdelcerro | * </em>
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367 | * </p>
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368 | 45541 | fdiaz | *
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369 | 40435 | jjdelcerro | * @see #accept(org.gvsig.tools.visitor.Visitor)
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370 | * @see #accept(org.gvsig.tools.visitor.Visitor, long)
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371 | 45541 | fdiaz | *
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372 | * @param index position in which the iterator is initially located.
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373 | *
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374 | 40435 | jjdelcerro | * @return an iterator initially located at the position indicated by the
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375 | 45541 | fdiaz | * given index
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376 | *
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377 | 40435 | jjdelcerro | * @throws DataException
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378 | */
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379 | 43987 | jjdelcerro | public DisposableIterator fastIterator(long index) throws DataException; |
380 | 40435 | jjdelcerro | |
381 | 43358 | jjdelcerro | public DisposableIterator fastIterator(long index, long elemets) throws DataException; |
382 | |||
383 | 45541 | fdiaz | /**
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384 | * Return the first feature of the set. If the set is empty return null.
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385 | *
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386 | * This not is a good method to determine if the set is empty. Use isEmpty
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387 | * instead.
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388 | *
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389 | * This is a utility method that call iterator and retrieve the first
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390 | * feature of the iterator.
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391 | *
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392 | * @return the first fearure of the set or null.
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393 | */
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394 | public Feature first();
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395 | 40435 | jjdelcerro | |
396 | 45541 | fdiaz | /**
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397 | * Updates a {@link Feature} with the given {@link EditableFeature}.<br>
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398 | *
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399 | * Any {@link DisposableIterator} from this store that was still in use can
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400 | * will not reflect this change.
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401 | *
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402 | * @param feature an instance of {@link EditableFeature} with which to
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403 | * update the associated {@link Feature}.
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404 | *
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405 | * @throws DataException
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406 | */
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407 | public void update(EditableFeature feature) throws DataException; |
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408 | 40435 | jjdelcerro | |
409 | 45541 | fdiaz | public void commitChanges() throws DataException; |
410 | |||
411 | 40435 | jjdelcerro | /**
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412 | 45541 | fdiaz | * Deletes a {@link Feature} from this FeatureSet.<br>
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413 | *
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414 | * Any {@link DisposableIterator} from this store that was still in use will
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415 | * be
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416 | * <i>unsafe</i>. Use {@link DisposableIterator#remove()} instead.
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417 | *
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418 | * @param feature the {@link Feature} to delete.
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419 | *
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420 | * @throws DataException
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421 | */
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422 | public void delete(Feature feature) throws DataException; |
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423 | |||
424 | /**
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425 | * Inserts a new feature in this set. It needs to be an instance of
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426 | * {@link EditableFeature} as it has not been stored yet.<br>
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427 | *
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428 | * Any {@link DisposableIterator} from this store that was still in use can
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429 | * will not reflect this change.
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430 | *
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431 | * @param feature the {@link EditableFeature} to insert.
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432 | *
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433 | * @throws DataException
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434 | */
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435 | public void insert(EditableFeature feature) throws DataException; |
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436 | |||
437 | /**
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438 | * Returns a {@link DynObjectSet} of the contents of this set. Defaults to
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439 | * fast iteration.
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440 | *
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441 | 40435 | jjdelcerro | * @return a {@link DynObjectSet}
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442 | */
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443 | public DynObjectSet getDynObjectSet();
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444 | |||
445 | /**
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446 | * Returns a {@link DynObjectSet} of the contents of this set.
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447 | 45541 | fdiaz | *
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448 | * @param fast if the set will be able to be iterated in a fast way, by
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449 | * reusing the {@link DynObject} instance for each {@link Feature} instance.
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450 | 40435 | jjdelcerro | * @return a {@link DynObjectSet}
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451 | */
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452 | public DynObjectSet getDynObjectSet(boolean fast); |
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453 | |||
454 | /**
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455 | * Provides each value of this Store to the provided {@link Visitor},
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456 | 45541 | fdiaz | * beginning from the provided index position. The values received through
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457 | * the {@link Visitor#visit(Object)} method may be transient, reused or
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458 | * externally modifiable, so they can't be used to be stored in any external
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459 | * form out of the visit method.
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460 | *
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461 | 40435 | jjdelcerro | * If you need to store any of the values out of the
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462 | * {@link Visitor#visit(Object)} method execution, create a copy or clone
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463 | * the received value in order to be stored.
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464 | 45541 | fdiaz | *
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465 | * @param visitor the visitor to apply to each value.
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466 | * @param firstValueIndex index of first element to be visited by the
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467 | * {@link Visitor}
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468 | * @exception BaseException if there is an error while performing the visit
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469 | 40435 | jjdelcerro | */
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470 | 43358 | jjdelcerro | @Override
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471 | 40435 | jjdelcerro | void accept(Visitor visitor, long firstValueIndex) throws BaseException; |
472 | 43358 | jjdelcerro | |
473 | void accept(Visitor visitor, long firstValueIndex, long elements) throws BaseException; |
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474 | 45541 | fdiaz | |
475 | 44092 | omartinez | public FeatureStore getFeatureStore();
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476 | 45541 | fdiaz | |
477 | 45696 | jjdelcerro | @Deprecated
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478 | 44655 | jjdelcerro | public JsonArray toJSON();
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479 | 45696 | jjdelcerro | |
480 | public JsonArray toJson();
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481 | |||
482 | public JsonArrayBuilder toJsonBuilder();
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483 | |||
484 | 47049 | jjdelcerro | public Expression makeFilter(int maxfeatures); |
485 | |||
486 | 45541 | fdiaz | } |