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 / DefaultFeatureIndex.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 | package org.gvsig.fmap.dal.feature.impl; |
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29 | |||
30 | import java.io.File; |
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31 | import java.util.ArrayList; |
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32 | import java.util.List; |
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33 | |||
34 | import org.cresques.Messages; |
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35 | import org.gvsig.fmap.dal.DataStoreNotification; |
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36 | import org.gvsig.fmap.dal.DataTypes; |
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37 | import org.gvsig.fmap.dal.exception.DataException; |
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38 | import org.gvsig.fmap.dal.exception.InitializeException; |
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39 | import org.gvsig.fmap.dal.feature.Feature; |
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40 | import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor; |
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41 | import org.gvsig.fmap.dal.feature.FeatureSet; |
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42 | import org.gvsig.fmap.dal.feature.FeatureStore; |
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43 | import org.gvsig.fmap.dal.feature.FeatureStoreNotification; |
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44 | import org.gvsig.fmap.dal.feature.FeatureType; |
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45 | import org.gvsig.fmap.dal.feature.exception.FeatureIndexException; |
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46 | import org.gvsig.fmap.dal.feature.exception.FeatureIndexOperationException; |
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47 | import org.gvsig.fmap.dal.feature.exception.InvalidFeatureIndexException; |
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48 | import org.gvsig.fmap.dal.feature.spi.DefaultLongList; |
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49 | import org.gvsig.fmap.dal.feature.spi.FeatureReferenceProviderServices; |
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50 | import org.gvsig.fmap.dal.feature.spi.FeatureStoreProviderServices; |
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51 | import org.gvsig.fmap.dal.feature.spi.index.FeatureIndexProvider; |
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52 | import org.gvsig.fmap.dal.feature.spi.index.FeatureIndexProviderServices; |
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53 | import org.gvsig.fmap.geom.primitive.NullGeometry; |
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54 | import org.gvsig.tools.dispose.DisposableIterator; |
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55 | import org.gvsig.tools.dispose.DisposeUtils; |
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56 | import org.gvsig.tools.dispose.impl.AbstractDisposable; |
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57 | import org.gvsig.tools.exception.BaseException; |
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58 | import org.gvsig.tools.observer.Observer; |
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59 | import org.gvsig.tools.observer.WeakReferencingObservable; |
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60 | import org.gvsig.tools.observer.impl.DelegateWeakReferencingObservable; |
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61 | import org.gvsig.tools.task.AbstractMonitorableTask; |
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62 | import org.gvsig.tools.task.CancellableTask; |
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63 | import org.gvsig.tools.task.MonitorableTask; |
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64 | import org.slf4j.Logger; |
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65 | import org.slf4j.LoggerFactory; |
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66 | |||
67 | /**
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68 | * Default feature index provider services.
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69 | *
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70 | * @author gvSIG team
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71 | */
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72 | public class DefaultFeatureIndex extends AbstractDisposable implements |
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73 | FeatureIndexProviderServices, |
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74 | WeakReferencingObservable { |
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75 | |||
76 | private static final Logger LOG = LoggerFactory |
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77 | .getLogger(DefaultFeatureIndex.class); |
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78 | |||
79 | private final FeatureStoreProviderServices featureStore; |
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80 | private final FeatureType featureType; |
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81 | private final String attributeName; |
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82 | private final String indexName; |
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83 | private final int dataType; |
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84 | private final FeatureIndexProvider indexProvider; |
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85 | private List attributeNames; |
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86 | |||
87 | private Object featureOperationTaskLock = new Object(); |
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88 | private FeatureIndexOperationTask featureIndexTask;
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89 | |||
90 | private boolean valid = true; |
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91 | |||
92 | private DelegateWeakReferencingObservable observable =
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93 | new DelegateWeakReferencingObservable(this); |
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94 | |||
95 | public DefaultFeatureIndex(FeatureStoreProviderServices featureStore,
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96 | FeatureType featureType, FeatureIndexProvider indexProvider, |
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97 | String attributeName, String indexName) { |
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98 | |||
99 | if (featureStore == null) { |
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100 | throw new IllegalArgumentException("featureStore cannot be null."); |
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101 | } |
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102 | if (featureType == null) { |
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103 | throw new IllegalArgumentException("featureType cannot be null."); |
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104 | } |
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105 | if (attributeName == null) { |
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106 | throw new IllegalArgumentException("attributeName cannot be null."); |
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107 | } |
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108 | if (indexName == null) { |
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109 | throw new IllegalArgumentException("indexName cannot be null."); |
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110 | } |
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111 | |||
112 | // FIXME Esto debe ir al provider
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113 | if (featureStore.getProvider().getOIDType() != DataTypes.INT
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114 | && featureStore.getProvider().getOIDType() != DataTypes.LONG) { |
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115 | throw new IllegalArgumentException(); |
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116 | } |
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117 | |||
118 | FeatureAttributeDescriptor attr = |
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119 | featureType.getAttributeDescriptor(attributeName); |
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120 | if (attr == null) { |
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121 | throw new IllegalArgumentException("Attribute " + attributeName |
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122 | + " not found in FeatureType " + featureType.toString());
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123 | } |
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124 | |||
125 | this.featureStore = featureStore;
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126 | this.featureType = featureType;
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127 | this.attributeName = attributeName;
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128 | this.indexName = indexName;
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129 | this.dataType = attr.getType();
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130 | this.indexProvider = indexProvider;
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131 | |||
132 | attributeNames = new ArrayList(); |
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133 | attributeNames.add(attributeName); |
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134 | } |
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135 | |||
136 | public final FeatureAttributeDescriptor getFeatureAttributeDescriptor() { |
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137 | return featureType.getAttributeDescriptor(attributeName);
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138 | } |
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139 | |||
140 | public final FeatureStoreProviderServices getFeatureStoreProviderServices() { |
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141 | return featureStore;
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142 | } |
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143 | |||
144 | public final FeatureType getFeatureType() { |
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145 | return featureType;
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146 | } |
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147 | |||
148 | public final String getAttributeName() { |
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149 | return attributeName;
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150 | } |
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151 | |||
152 | public final int getDataType() { |
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153 | return dataType;
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154 | } |
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155 | |||
156 | /**
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157 | * {@link MonitorableTask} and {@link CancellableTask} to perform long
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158 | * operations on the index: filling and inserting or deleting a feature set.
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159 | *
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160 | * @author gvSIG Team
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161 | * @version $Id$
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162 | */
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163 | private static class FeatureIndexOperationTask extends |
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164 | AbstractMonitorableTask { |
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165 | |||
166 | private final DefaultFeatureIndex index; |
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167 | |||
168 | public static final int OP_FILL = 0; |
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169 | public static final int OP_INSERT_FSET = 1; |
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170 | public static final int OP_DELETE_FSET = 2; |
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171 | |||
172 | private static final String[] OP_NAMES = { // |
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173 | Messages.getText("filling_index"), // OP_FILL |
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174 | Messages.getText("updating_index"), // OP_INSERT_FSET |
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175 | Messages.getText("updating_index"), // OP_DELETE_FSET |
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176 | }; |
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177 | |||
178 | private final int operation; |
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179 | |||
180 | private final FeatureSet data; |
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181 | |||
182 | private final Observer operationObserver; |
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183 | |||
184 | private final FeatureStore store; |
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185 | |||
186 | /**
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187 | * Creates a new {@link FeatureIndexOperationTask}
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188 | *
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189 | * @param index
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190 | * to operate on
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191 | * @param store
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192 | * to index data from
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193 | * @param operation
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194 | * to perform: {@link #OP_FILL}, {@link #OP_INSERT_FSET} or
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195 | * {@link #OP_DELETE_FSET}
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196 | * @param data
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197 | * feature set to insert or delete in the insert or delete
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198 | * operations
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199 | * @param operationObserver
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200 | * to be notified when the operation starts, finishes, is
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201 | * cancelled or has finished with errors
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202 | */
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203 | protected FeatureIndexOperationTask(DefaultFeatureIndex index,
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204 | FeatureStore store, int operation, FeatureSet data,
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205 | Observer operationObserver) {
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206 | super(OP_NAMES[operation]);
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207 | this.index = index;
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208 | this.store = store;
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209 | this.operation = operation;
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210 | this.data = data;
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211 | this.operationObserver = operationObserver;
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212 | setDaemon(true);
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213 | setPriority(MIN_PRIORITY); |
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214 | } |
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215 | |||
216 | public void run() { |
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217 | try {
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218 | switch (operation) {
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219 | case OP_FILL:
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220 | notify(FeatureStoreNotification.INDEX_FILLING_STARTED); |
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221 | clearAndFill(); |
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222 | break;
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223 | |||
224 | case OP_INSERT_FSET:
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225 | notify(FeatureStoreNotification.INDEX_FILLING_STARTED); |
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226 | insert(data); |
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227 | break;
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228 | |||
229 | case OP_DELETE_FSET:
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230 | notify(FeatureStoreNotification.INDEX_FILLING_STARTED); |
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231 | delete(data); |
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232 | break;
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233 | } |
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234 | } catch (Exception e) { |
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235 | Exception fioex =
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236 | new FeatureIndexOperationException(index,
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237 | OP_NAMES[operation], e); |
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238 | notify(FeatureStoreNotification.INDEX_FILLING_ERROR, fioex); |
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239 | throw new RuntimeException(fioex); |
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240 | } finally {
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241 | index.removeTask(this);
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242 | } |
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243 | } |
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244 | |||
245 | /**
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246 | * Clears the index data and fills it again.
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247 | */
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248 | private void clearAndFill() throws DataException { |
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249 | FeatureSet set = null;
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250 | try {
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251 | synchronized (index) {
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252 | set = store.getFeatureSet(); |
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253 | if (isCancellationRequested()) {
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254 | cancel(); |
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255 | return;
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256 | } |
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257 | index.clear(); |
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258 | if (isCancellationRequested()) {
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259 | cancel(); |
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260 | return;
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261 | } |
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262 | insert(set); |
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263 | index.setValid(true);
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264 | } |
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265 | } catch (IllegalStateException e) { |
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266 | // The feature store has entered in editing or
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267 | // append mode again, cancel indexing.
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268 | cancel(); |
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269 | } finally {
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270 | DisposeUtils.dispose(set); |
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271 | } |
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272 | } |
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273 | |||
274 | private void insert(FeatureSet data) throws DataException { |
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275 | DisposableIterator it = null;
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276 | long counter = 0; |
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277 | try {
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278 | it = data.fastIterator(); |
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279 | synchronized (index) {
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280 | taskStatus.setRangeOfValues(0, data.getSize());
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281 | taskStatus.add(); |
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282 | while (it.hasNext()) {
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283 | if (isCancellationRequested()) {
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284 | index.clear(); |
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285 | cancel(); |
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286 | return;
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287 | } |
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288 | Feature feat = (Feature) it.next(); |
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289 | index.insert(feat); |
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290 | taskStatus.setCurValue(counter++); |
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291 | } |
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292 | notify(FeatureStoreNotification.INDEX_FILLING_SUCCESS); |
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293 | } |
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294 | taskStatus.terminate(); |
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295 | } catch (IllegalStateException e) { |
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296 | // The feature store has entered in editing or
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297 | // append mode again, cancel indexing.
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298 | taskStatus.cancel(); |
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299 | } catch (RuntimeException e) { |
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300 | taskStatus.abort(); |
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301 | throw e;
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302 | } catch (DataException e) {
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303 | taskStatus.abort(); |
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304 | throw e;
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305 | } finally {
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306 | DisposeUtils.dispose(it); |
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307 | taskStatus.remove(); |
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308 | } |
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309 | } |
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310 | |||
311 | private void delete(FeatureSet data) throws FeatureIndexException { |
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312 | DisposableIterator it = null;
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313 | try {
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314 | it = data.fastIterator(); |
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315 | synchronized (index) {
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316 | while (it.hasNext()) {
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317 | if (isCancellationRequested()) {
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318 | cancel(); |
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319 | return;
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320 | } |
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321 | Feature feat = (Feature) it.next(); |
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322 | index.delete(feat); |
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323 | } |
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324 | notify(FeatureStoreNotification.INDEX_FILLING_SUCCESS); |
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325 | } |
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326 | } catch (DataException e) {
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327 | throw new FeatureIndexException(e); |
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328 | } finally {
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329 | DisposeUtils.dispose(it); |
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330 | } |
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331 | } |
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332 | |||
333 | private void cancel() { |
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334 | notify(FeatureStoreNotification.INDEX_FILLING_CANCELLED); |
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335 | taskStatus.cancel(); |
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336 | } |
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337 | |||
338 | public void notifyOperationObserver(DataStoreNotification notification) { |
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339 | if (this.operationObserver != null) { |
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340 | this.operationObserver.update(index, notification);
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341 | } |
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342 | } |
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343 | |||
344 | private void notify(String notificationType) { |
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345 | DataStoreNotification notification = |
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346 | new DefaultFeatureStoreNotification(store, notificationType,
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347 | index); |
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348 | notifyOperationObserver(notification); |
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349 | index.notifyObservers(notification); |
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350 | } |
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351 | |||
352 | private void notify(String notificationType, Exception exception) { |
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353 | DataStoreNotification notification = |
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354 | new DefaultFeatureStoreNotification(store, notificationType,
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355 | exception); |
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356 | notifyOperationObserver(notification); |
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357 | index.notifyObservers(notification); |
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358 | } |
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359 | } |
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360 | |||
361 | private FeatureIndexOperationTask createIndexTask(int operation, |
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362 | FeatureSet data, Observer observer) {
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363 | synchronized (featureOperationTaskLock) {
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364 | if (featureIndexTask != null) { |
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365 | this.featureIndexTask.cancelRequest();
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366 | removeTask(this.featureIndexTask);
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367 | } |
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368 | FeatureIndexOperationTask fillingTask = |
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369 | new FeatureIndexOperationTask(this, |
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370 | featureStore.getFeatureStore(), operation, data, observer); |
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371 | this.featureIndexTask = fillingTask;
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372 | return fillingTask;
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373 | } |
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374 | } |
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375 | |||
376 | private void removeTask(FeatureIndexOperationTask task) { |
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377 | synchronized (featureOperationTaskLock) {
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378 | // Remove if it is not null and the same task
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379 | if (this.featureIndexTask == task) { |
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380 | featureIndexTask = null;
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381 | } |
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382 | } |
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383 | } |
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384 | |||
385 | public void fill() throws FeatureIndexException { |
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386 | fill(false, null); |
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387 | } |
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388 | |||
389 | public void fill(boolean background, Observer observer) |
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390 | throws FeatureIndexException {
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391 | FeatureIndexOperationTask task = |
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392 | createIndexTask(FeatureIndexOperationTask.OP_FILL, null, observer);
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393 | if (background) {
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394 | task.start(); |
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395 | } else {
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396 | task.run(); |
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397 | } |
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398 | } |
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399 | |||
400 | public final void insert(FeatureSet data) throws DataException { |
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401 | if (!isValid()) {
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402 | throw new InvalidFeatureIndexException(); |
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403 | } |
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404 | FeatureIndexOperationTask task = |
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405 | createIndexTask(FeatureIndexOperationTask.OP_INSERT_FSET, data, |
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406 | null);
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407 | task.run(); |
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408 | } |
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409 | |||
410 | public synchronized final void insert(Feature feat) throws DataException { |
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411 | try {
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412 | FeatureIndexProvider prov = getIndexProvider(); |
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413 | Object value = feat.get(getAttributeName());
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414 | if(prov.allowNulls() || !(value instanceof NullGeometry)) { |
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415 | prov.insert(value, |
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416 | (FeatureReferenceProviderServices) feat.getReference()); |
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417 | } |
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418 | } catch (NullPointerException e) { |
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419 | throw new IllegalArgumentException("Could not add Feature: " + feat |
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420 | + " to index " + this |
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421 | + ". It does not contain a column with name "
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422 | + getAttributeName()); |
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423 | } catch (ClassCastException e) { |
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424 | throw new IllegalArgumentException("Could not add Feature: " + feat |
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425 | + " to index " + this + ". Attribute " + getAttributeName() |
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426 | + " data type is not valid.");
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427 | } |
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428 | } |
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429 | |||
430 | public final void delete(FeatureSet data) throws FeatureIndexException { |
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431 | if (!isValid()) {
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432 | throw new InvalidFeatureIndexException(); |
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433 | } |
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434 | FeatureIndexOperationTask task = |
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435 | createIndexTask(FeatureIndexOperationTask.OP_DELETE_FSET, data, |
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436 | null);
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437 | task.run(); |
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438 | } |
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439 | |||
440 | public synchronized final void delete(Feature feat) throws DataException { |
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441 | getIndexProvider().delete(feat.get(getAttributeName()), |
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442 | (FeatureReferenceProviderServices) feat.getReference()); |
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443 | } |
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444 | |||
445 | private synchronized void clear() throws DataException { |
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446 | getIndexProvider().clear(); |
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447 | } |
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448 | |||
449 | public synchronized FeatureSet getMatchFeatureSet(Object value) |
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450 | throws FeatureIndexException {
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451 | if (!isValid()) {
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452 | throw new InvalidFeatureIndexException(); |
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453 | } |
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454 | return new IndexFeatureSet(this, new DefaultLongList( |
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455 | indexProvider.match(value))); |
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456 | } |
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457 | |||
458 | public synchronized FeatureSet getRangeFeatureSet(Object value1, |
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459 | Object value2) throws FeatureIndexException { |
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460 | if (!isValid()) {
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461 | throw new InvalidFeatureIndexException(); |
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462 | } |
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463 | return new IndexFeatureSet(this, new DefaultLongList( |
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464 | indexProvider.range(value1, value2))); |
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465 | } |
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466 | |||
467 | public synchronized FeatureSet getNearestFeatureSet(int count, Object value) |
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468 | throws FeatureIndexException {
|
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469 | if (!isValid()) {
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470 | throw new InvalidFeatureIndexException(); |
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471 | } |
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472 | return new IndexFeatureSet(this, new DefaultLongList( |
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473 | indexProvider.nearest(count, value))); |
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474 | } |
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475 | |||
476 | public synchronized FeatureSet getNearestFeatureSet(int count, |
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477 | Object value, Object tolerance) throws FeatureIndexException { |
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478 | if (!isValid()) {
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479 | throw new InvalidFeatureIndexException(); |
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480 | } |
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481 | return new IndexFeatureSet(this, new DefaultLongList( |
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482 | indexProvider.nearest(count, value, tolerance))); |
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483 | } |
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484 | |||
485 | public void initialize() throws InitializeException { |
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486 | indexProvider.setFeatureIndexProviderServices(this);
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487 | indexProvider.initialize(); |
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488 | } |
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489 | |||
490 | public List getAttributeNames() { |
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491 | return attributeNames;
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492 | } |
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493 | |||
494 | public String getNewFileName(String prefix, String sufix) { |
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495 | int n = 0; |
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496 | File file = new File(prefix + getName(), sufix); |
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497 | while (file.exists()) {
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498 | n++; |
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499 | file = new File(prefix + getName() + n, sufix); |
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500 | } |
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501 | return file.getAbsolutePath();
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502 | } |
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503 | |||
504 | public String getFileName() { |
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505 | // TODO Auto-generated method stub
|
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506 | return null; |
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507 | } |
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508 | |||
509 | public String getTemporaryFileName() { |
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510 | // TODO Auto-generated method stub
|
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511 | return null; |
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512 | } |
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513 | |||
514 | |||
515 | public FeatureIndexProvider getFeatureIndexProvider() {
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516 | return this.indexProvider; |
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517 | } |
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518 | |||
519 | public boolean isFilling() { |
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520 | synchronized (featureOperationTaskLock) {
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521 | return featureIndexTask != null; |
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522 | } |
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523 | } |
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524 | |||
525 | public boolean isValid() { |
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526 | synchronized (featureOperationTaskLock) {
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527 | return !isFilling() && valid;
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528 | } |
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529 | } |
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530 | |||
531 | public synchronized void waitForIndex() { |
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532 | // Nothing to do, this is just used for anyone to block until the index
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533 | // has finished being used by a FeatureIndexOperation.
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534 | LOG.debug("Wait finished for index: {}", this); |
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535 | } |
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536 | |||
537 | public void setValid(boolean valid) { |
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538 | synchronized (featureOperationTaskLock) {
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539 | this.valid = valid;
|
||
540 | } |
||
541 | } |
||
542 | |||
543 | protected void doDispose() throws BaseException { |
||
544 | synchronized (featureOperationTaskLock) {
|
||
545 | setValid(false);
|
||
546 | if (this.featureIndexTask != null) { |
||
547 | this.featureIndexTask.cancelRequest();
|
||
548 | this.featureIndexTask = null; |
||
549 | } |
||
550 | } |
||
551 | // Wait for any task until it finishes running
|
||
552 | synchronized (this) { |
||
553 | return;
|
||
554 | } |
||
555 | } |
||
556 | |||
557 | public String toString() { |
||
558 | return "Feature index with name" + indexName |
||
559 | + ", for the FeatureType: " + featureType + ", and the attribute: " |
||
560 | + attributeName; |
||
561 | } |
||
562 | |||
563 | public void notifyObservers(Object notification) { |
||
564 | observable.notifyObservers(notification); |
||
565 | } |
||
566 | |||
567 | public String getName() { |
||
568 | return indexName;
|
||
569 | } |
||
570 | |||
571 | private FeatureIndexProvider getIndexProvider() {
|
||
572 | return indexProvider;
|
||
573 | } |
||
574 | |||
575 | public void addObserver(Observer observer) { |
||
576 | observable.addObserver(observer); |
||
577 | } |
||
578 | |||
579 | public void deleteObserver(Observer observer) { |
||
580 | observable.deleteObserver(observer); |
||
581 | } |
||
582 | |||
583 | public void deleteObservers() { |
||
584 | observable.deleteObservers(); |
||
585 | } |
||
586 | |||
587 | } |