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 / IndexFeatureSet.java @ 40435
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1 | 40435 | jjdelcerro | /* gvSIG. Geographic Information System of the Valencian Government
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2 | *
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3 | * Copyright (C) 2007-2008 Infrastructures and Transports Department
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4 | * of the Valencian Government (CIT)
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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 2
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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 | */
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22 | |||
23 | /*
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24 | * AUTHORS (In addition to CIT):
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25 | * 2008 {{Company}} {{Task}}
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26 | */
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27 | |||
28 | |||
29 | package org.gvsig.fmap.dal.feature.impl; |
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30 | |||
31 | import java.util.ArrayList; |
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32 | import java.util.Collections; |
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33 | import java.util.Iterator; |
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34 | import java.util.List; |
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35 | |||
36 | import org.gvsig.fmap.dal.DataStore; |
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37 | import org.gvsig.fmap.dal.exception.DataException; |
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38 | import org.gvsig.fmap.dal.exception.ReadRuntimeException; |
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39 | import org.gvsig.fmap.dal.feature.EditableFeature; |
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40 | import org.gvsig.fmap.dal.feature.Feature; |
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41 | import org.gvsig.fmap.dal.feature.FeatureReference; |
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42 | import org.gvsig.fmap.dal.feature.FeatureSet; |
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43 | import org.gvsig.fmap.dal.feature.FeatureType; |
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44 | import org.gvsig.fmap.dal.feature.impl.featureset.DynObjectSetFeatureSetFacade; |
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45 | import org.gvsig.fmap.dal.feature.spi.FeatureProvider; |
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46 | import org.gvsig.fmap.dal.feature.spi.FeatureReferenceProviderServices; |
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47 | import org.gvsig.fmap.dal.feature.spi.FeatureSetProvider; |
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48 | import org.gvsig.fmap.dal.feature.spi.FeatureStoreProvider; |
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49 | import org.gvsig.fmap.dal.feature.spi.FeatureStoreProviderServices; |
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50 | import org.gvsig.fmap.dal.feature.spi.LongList; |
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51 | import org.gvsig.fmap.dal.feature.spi.index.FeatureIndexProviderServices; |
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52 | import org.gvsig.tools.dispose.DisposableIterator; |
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53 | import org.gvsig.tools.dynobject.DynObjectSet; |
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54 | import org.gvsig.tools.exception.BaseException; |
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55 | import org.gvsig.tools.visitor.Visitor; |
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56 | |||
57 | |||
58 | public class IndexFeatureSet implements FeatureSet, FeatureSetProvider { |
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59 | |||
60 | LongList featureReferences = null;
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61 | FeatureStoreProvider storeProvider = null;
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62 | FeatureStoreProviderServices store = null;
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63 | FeatureIndexProviderServices index = null;
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64 | List featureTypes = null; |
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65 | |||
66 | public class IndexIterator implements DisposableIterator { |
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67 | Iterator it = null; |
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68 | |||
69 | public IndexIterator(Iterator it) { |
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70 | this.it = it;
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71 | } |
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72 | |||
73 | public boolean hasNext() { |
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74 | return it.hasNext();
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75 | } |
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76 | |||
77 | public Object next() { |
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78 | Object oid = it.next();
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79 | FeatureReference ref = new DefaultFeatureReference(store
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80 | .getFeatureStore(), oid); |
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81 | try {
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82 | return store.getFeatureStore().getFeatureByReference(ref);
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83 | } catch (DataException e) {
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84 | throw new ReadRuntimeException(store.getName(), e); |
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85 | } |
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86 | } |
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87 | |||
88 | public void remove() { |
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89 | throw new UnsupportedOperationException(); |
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90 | } |
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91 | |||
92 | public void dispose() { |
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93 | this.it = null; |
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94 | } |
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95 | } |
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96 | |||
97 | public class FastIndexIterator implements DisposableIterator { |
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98 | Iterator it = null; |
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99 | DefaultFeature feature = null;
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100 | |||
101 | public FastIndexIterator(Iterator it) throws DataException { |
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102 | this.it = it;
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103 | feature = (DefaultFeature) store.createFeature(storeProvider |
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104 | .createFeatureProvider(index.getFeatureType())); |
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105 | } |
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106 | |||
107 | public boolean hasNext() { |
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108 | return it.hasNext();
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109 | } |
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110 | |||
111 | public Object next() { |
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112 | Object oid = it.next();
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113 | try {
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114 | // Long longer=new Long(((Integer)oid).longValue());
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115 | FeatureReference ref = new DefaultFeatureReference(store
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116 | .getFeatureStore(), oid); |
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117 | FeatureProvider data = storeProvider |
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118 | .getFeatureProviderByReference((FeatureReferenceProviderServices) ref); |
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119 | |||
120 | feature.setData(data); |
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121 | |||
122 | return feature;
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123 | } catch (DataException e) {
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124 | throw new ReadRuntimeException(store.getName(), e); |
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125 | } |
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126 | } |
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127 | |||
128 | public void remove() { |
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129 | throw new UnsupportedOperationException(); |
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130 | } |
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131 | |||
132 | public void dispose() { |
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133 | this.it = null; |
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134 | this.feature = null; |
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135 | |||
136 | } |
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137 | } |
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138 | |||
139 | public IndexFeatureSet(FeatureIndexProviderServices index, LongList featureReferences) {
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140 | this.featureReferences = featureReferences;
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141 | this.store = index.getFeatureStoreProviderServices();
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142 | this.storeProvider = store.getProvider();
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143 | this.index = index;
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144 | } |
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145 | |||
146 | public boolean canFilter() { |
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147 | return false; |
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148 | } |
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149 | |||
150 | public boolean canIterateFromIndex() { |
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151 | return true; |
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152 | } |
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153 | |||
154 | public boolean canOrder() { |
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155 | return false; |
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156 | } |
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157 | |||
158 | public DisposableIterator fastIterator(long index) throws DataException { |
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159 | if (store.getFeatureStore().isEditing()) {
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160 | return this.iterator(index); |
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161 | } |
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162 | return new FastIndexIterator(this.featureReferences.iterator(index)); |
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163 | } |
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164 | |||
165 | public DisposableIterator fastIterator() throws DataException { |
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166 | if (store.getFeatureStore().isEditing()) {
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167 | return this.iterator(); |
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168 | } |
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169 | return new FastIndexIterator(this.featureReferences.iterator()); |
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170 | } |
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171 | |||
172 | public long getSize() throws DataException { |
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173 | return featureReferences.getSize();
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174 | } |
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175 | |||
176 | public boolean isEmpty() throws DataException { |
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177 | return featureReferences.isEmpty();
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178 | } |
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179 | |||
180 | public DisposableIterator iterator() throws DataException { |
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181 | return new IndexIterator(this.featureReferences.iterator()); |
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182 | } |
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183 | |||
184 | public DisposableIterator iterator(long index) throws DataException { |
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185 | return new IndexIterator(this.featureReferences.iterator(index)); |
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186 | } |
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187 | |||
188 | public void delete(Feature feature) throws DataException { |
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189 | index.delete(feature); |
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190 | store.getFeatureStore().delete(feature); |
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191 | } |
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192 | |||
193 | public FeatureType getDefaultFeatureType() {
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194 | return index.getFeatureType();
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195 | } |
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196 | |||
197 | public List getFeatureTypes() { |
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198 | List types = new ArrayList(); |
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199 | types.add(index.getFeatureType()); |
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200 | return Collections.unmodifiableList(types); |
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201 | } |
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202 | |||
203 | public void insert(EditableFeature feature) throws DataException { |
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204 | index.insert(feature); |
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205 | store.getFeatureStore().insert(feature); |
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206 | } |
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207 | |||
208 | public void update(EditableFeature feature) throws DataException { |
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209 | store.getFeatureStore().update(feature); |
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210 | // we need to re-index the feature, since its shape might have changed
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211 | index.delete(feature); |
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212 | index.insert(feature); |
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213 | } |
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214 | |||
215 | public void dispose() { |
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216 | |||
217 | } |
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218 | |||
219 | public boolean isFromStore(DataStore store) { |
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220 | return this.store.equals(store); |
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221 | } |
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222 | |||
223 | public void accept(Visitor visitor) throws BaseException { |
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224 | accept(visitor, 0);
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225 | } |
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226 | |||
227 | public void accept(Visitor visitor, long firstValueIndex) |
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228 | throws BaseException {
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229 | synchronized (store.getFeatureStore()) {
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230 | DisposableIterator iterator = fastIterator(firstValueIndex); |
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231 | |||
232 | if (iterator != null) { |
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233 | try {
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234 | while (iterator.hasNext()) {
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235 | Feature feature = (Feature) iterator.next(); |
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236 | visitor.visit(feature); |
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237 | } |
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238 | } finally {
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239 | iterator.dispose(); |
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240 | } |
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241 | } |
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242 | } |
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243 | } |
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244 | |||
245 | public DynObjectSet getDynObjectSet() {
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246 | return new DynObjectSetFeatureSetFacade(this, store.getFeatureStore()); |
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247 | } |
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248 | |||
249 | public DynObjectSet getDynObjectSet(boolean fast) { |
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250 | return new DynObjectSetFeatureSetFacade(this, store.getFeatureStore(), |
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251 | fast); |
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252 | } |
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253 | |||
254 | } |