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
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1 | 40559 | jjdelcerro | /**
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2 | * gvSIG. Desktop Geographic Information System.
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3 | 40435 | jjdelcerro | *
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4 | 40559 | jjdelcerro | * Copyright (C) 2007-2013 gvSIG Association.
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5 | 40435 | jjdelcerro | *
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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 | 40559 | jjdelcerro | * as published by the Free Software Foundation; either version 3
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9 | 40435 | jjdelcerro | * 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 | 40559 | jjdelcerro | * 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 | 40435 | jjdelcerro | */
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24 | |||
25 | package org.gvsig.fmap.dal.feature.impl; |
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26 | |||
27 | import java.io.File; |
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28 | import java.util.ArrayList; |
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29 | import java.util.List; |
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30 | |||
31 | import org.cresques.Messages; |
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32 | import org.gvsig.fmap.dal.DataStoreNotification; |
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33 | import org.gvsig.fmap.dal.DataTypes; |
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34 | import org.gvsig.fmap.dal.exception.DataException; |
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35 | import org.gvsig.fmap.dal.exception.InitializeException; |
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36 | import org.gvsig.fmap.dal.feature.Feature; |
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37 | import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor; |
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38 | import org.gvsig.fmap.dal.feature.FeatureSet; |
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39 | import org.gvsig.fmap.dal.feature.FeatureStore; |
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40 | import org.gvsig.fmap.dal.feature.FeatureStoreNotification; |
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41 | import org.gvsig.fmap.dal.feature.FeatureType; |
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42 | import org.gvsig.fmap.dal.feature.exception.FeatureIndexException; |
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43 | import org.gvsig.fmap.dal.feature.exception.FeatureIndexOperationException; |
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44 | import org.gvsig.fmap.dal.feature.exception.InvalidFeatureIndexException; |
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45 | import org.gvsig.fmap.dal.feature.spi.DefaultLongList; |
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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.FeatureStoreProviderServices; |
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48 | import org.gvsig.fmap.dal.feature.spi.index.FeatureIndexProvider; |
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49 | import org.gvsig.fmap.dal.feature.spi.index.FeatureIndexProviderServices; |
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50 | import org.gvsig.tools.dispose.DisposableIterator; |
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51 | import org.gvsig.tools.dispose.DisposeUtils; |
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52 | import org.gvsig.tools.dispose.impl.AbstractDisposable; |
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53 | import org.gvsig.tools.exception.BaseException; |
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54 | import org.gvsig.tools.observer.Observer; |
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55 | import org.gvsig.tools.observer.WeakReferencingObservable; |
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56 | import org.gvsig.tools.observer.impl.DelegateWeakReferencingObservable; |
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57 | import org.gvsig.tools.task.AbstractMonitorableTask; |
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58 | import org.gvsig.tools.task.CancellableTask; |
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59 | import org.gvsig.tools.task.MonitorableTask; |
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60 | import org.slf4j.Logger; |
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61 | import org.slf4j.LoggerFactory; |
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62 | |||
63 | /**
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64 | * Default feature index provider services.
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65 | *
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66 | * @author gvSIG team
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67 | */
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68 | public class DefaultFeatureIndex extends AbstractDisposable implements |
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69 | FeatureIndexProviderServices, |
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70 | WeakReferencingObservable { |
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71 | |||
72 | private static final Logger LOG = LoggerFactory |
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73 | .getLogger(DefaultFeatureIndex.class); |
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74 | |||
75 | private final FeatureStoreProviderServices featureStore; |
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76 | private final FeatureType featureType; |
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77 | private final String attributeName; |
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78 | private final String indexName; |
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79 | private final int dataType; |
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80 | private final FeatureIndexProvider indexProvider; |
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81 | private List attributeNames; |
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82 | |||
83 | private Object featureOperationTaskLock = new Object(); |
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84 | private FeatureIndexOperationTask featureIndexTask;
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85 | |||
86 | private boolean valid = true; |
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87 | |||
88 | private DelegateWeakReferencingObservable observable =
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89 | new DelegateWeakReferencingObservable(this); |
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90 | |||
91 | public DefaultFeatureIndex(FeatureStoreProviderServices featureStore,
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92 | FeatureType featureType, FeatureIndexProvider indexProvider, |
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93 | String attributeName, String indexName) { |
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94 | |||
95 | if (featureStore == null) { |
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96 | throw new IllegalArgumentException("featureStore cannot be null."); |
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97 | } |
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98 | if (featureType == null) { |
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99 | throw new IllegalArgumentException("featureType cannot be null."); |
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100 | } |
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101 | if (attributeName == null) { |
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102 | throw new IllegalArgumentException("attributeName cannot be null."); |
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103 | } |
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104 | if (indexName == null) { |
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105 | throw new IllegalArgumentException("indexName cannot be null."); |
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106 | } |
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107 | |||
108 | // FIXME Esto debe ir al provider
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109 | if (featureStore.getProvider().getOIDType() != DataTypes.INT
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110 | && featureStore.getProvider().getOIDType() != DataTypes.LONG) { |
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111 | throw new IllegalArgumentException(); |
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112 | } |
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113 | |||
114 | FeatureAttributeDescriptor attr = |
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115 | featureType.getAttributeDescriptor(attributeName); |
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116 | if (attr == null) { |
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117 | throw new IllegalArgumentException("Attribute " + attributeName |
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118 | + " not found in FeatureType " + featureType.toString());
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119 | } |
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120 | |||
121 | this.featureStore = featureStore;
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122 | this.featureType = featureType;
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123 | this.attributeName = attributeName;
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124 | this.indexName = indexName;
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125 | this.dataType = attr.getType();
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126 | this.indexProvider = indexProvider;
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127 | |||
128 | attributeNames = new ArrayList(); |
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129 | attributeNames.add(attributeName); |
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130 | 44158 | jjdelcerro | |
131 | this.indexProvider.setFeatureIndexProviderServices(this); |
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132 | 40435 | jjdelcerro | } |
133 | |||
134 | public final FeatureAttributeDescriptor getFeatureAttributeDescriptor() { |
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135 | return featureType.getAttributeDescriptor(attributeName);
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136 | } |
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137 | |||
138 | public final FeatureStoreProviderServices getFeatureStoreProviderServices() { |
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139 | return featureStore;
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140 | } |
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141 | |||
142 | public final FeatureType getFeatureType() { |
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143 | return featureType;
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144 | } |
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145 | |||
146 | public final String getAttributeName() { |
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147 | return attributeName;
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148 | } |
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149 | |||
150 | public final int getDataType() { |
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151 | return dataType;
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152 | } |
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153 | |||
154 | /**
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155 | * {@link MonitorableTask} and {@link CancellableTask} to perform long
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156 | * operations on the index: filling and inserting or deleting a feature set.
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157 | *
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158 | * @author gvSIG Team
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159 | * @version $Id$
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160 | */
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161 | private static class FeatureIndexOperationTask extends |
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162 | AbstractMonitorableTask { |
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163 | |||
164 | private final DefaultFeatureIndex index; |
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165 | |||
166 | public static final int OP_FILL = 0; |
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167 | public static final int OP_INSERT_FSET = 1; |
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168 | public static final int OP_DELETE_FSET = 2; |
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169 | |||
170 | private static final String[] OP_NAMES = { // |
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171 | Messages.getText("filling_index"), // OP_FILL |
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172 | Messages.getText("updating_index"), // OP_INSERT_FSET |
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173 | Messages.getText("updating_index"), // OP_DELETE_FSET |
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174 | }; |
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175 | |||
176 | private final int operation; |
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177 | |||
178 | private final FeatureSet data; |
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179 | |||
180 | private final Observer operationObserver; |
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181 | |||
182 | private final FeatureStore store; |
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183 | |||
184 | /**
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185 | * Creates a new {@link FeatureIndexOperationTask}
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186 | *
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187 | * @param index
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188 | * to operate on
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189 | * @param store
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190 | * to index data from
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191 | * @param operation
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192 | * to perform: {@link #OP_FILL}, {@link #OP_INSERT_FSET} or
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193 | * {@link #OP_DELETE_FSET}
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194 | * @param data
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195 | * feature set to insert or delete in the insert or delete
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196 | * operations
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197 | * @param operationObserver
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198 | * to be notified when the operation starts, finishes, is
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199 | * cancelled or has finished with errors
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200 | */
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201 | protected FeatureIndexOperationTask(DefaultFeatureIndex index,
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202 | FeatureStore store, int operation, FeatureSet data,
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203 | Observer operationObserver) {
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204 | super(OP_NAMES[operation]);
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205 | this.index = index;
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206 | this.store = store;
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207 | this.operation = operation;
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208 | this.data = data;
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209 | this.operationObserver = operationObserver;
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210 | setDaemon(true);
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211 | setPriority(MIN_PRIORITY); |
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212 | } |
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213 | |||
214 | public void run() { |
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215 | try {
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216 | switch (operation) {
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217 | case OP_FILL:
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218 | notify(FeatureStoreNotification.INDEX_FILLING_STARTED); |
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219 | clearAndFill(); |
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220 | break;
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221 | |||
222 | case OP_INSERT_FSET:
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223 | notify(FeatureStoreNotification.INDEX_FILLING_STARTED); |
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224 | insert(data); |
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225 | break;
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226 | |||
227 | case OP_DELETE_FSET:
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228 | notify(FeatureStoreNotification.INDEX_FILLING_STARTED); |
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229 | delete(data); |
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230 | break;
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231 | } |
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232 | } catch (Exception e) { |
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233 | Exception fioex =
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234 | new FeatureIndexOperationException(index,
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235 | OP_NAMES[operation], e); |
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236 | notify(FeatureStoreNotification.INDEX_FILLING_ERROR, fioex); |
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237 | throw new RuntimeException(fioex); |
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238 | } finally {
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239 | index.removeTask(this);
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240 | } |
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241 | } |
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242 | |||
243 | /**
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244 | * Clears the index data and fills it again.
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245 | */
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246 | private void clearAndFill() throws DataException { |
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247 | FeatureSet set = null;
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248 | try {
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249 | synchronized (index) {
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250 | set = store.getFeatureSet(); |
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251 | if (isCancellationRequested()) {
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252 | cancel(); |
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253 | return;
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254 | } |
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255 | index.clear(); |
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256 | if (isCancellationRequested()) {
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257 | cancel(); |
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258 | return;
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259 | } |
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260 | insert(set); |
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261 | index.setValid(true);
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262 | } |
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263 | } catch (IllegalStateException e) { |
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264 | // The feature store has entered in editing or
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265 | // append mode again, cancel indexing.
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266 | cancel(); |
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267 | } finally {
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268 | DisposeUtils.dispose(set); |
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269 | } |
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270 | } |
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271 | |||
272 | private void insert(FeatureSet data) throws DataException { |
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273 | DisposableIterator it = null;
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274 | long counter = 0; |
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275 | try {
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276 | it = data.fastIterator(); |
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277 | synchronized (index) {
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278 | taskStatus.setRangeOfValues(0, data.getSize());
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279 | taskStatus.add(); |
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280 | while (it.hasNext()) {
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281 | if (isCancellationRequested()) {
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282 | index.clear(); |
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283 | cancel(); |
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284 | return;
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285 | } |
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286 | Feature feat = (Feature) it.next(); |
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287 | index.insert(feat); |
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288 | taskStatus.setCurValue(counter++); |
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289 | } |
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290 | notify(FeatureStoreNotification.INDEX_FILLING_SUCCESS); |
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291 | } |
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292 | taskStatus.terminate(); |
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293 | } catch (IllegalStateException e) { |
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294 | // The feature store has entered in editing or
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295 | // append mode again, cancel indexing.
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296 | taskStatus.cancel(); |
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297 | } catch (RuntimeException e) { |
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298 | taskStatus.abort(); |
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299 | throw e;
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300 | } catch (DataException e) {
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301 | taskStatus.abort(); |
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302 | throw e;
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303 | } finally {
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304 | DisposeUtils.dispose(it); |
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305 | taskStatus.remove(); |
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306 | } |
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307 | } |
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308 | |||
309 | private void delete(FeatureSet data) throws FeatureIndexException { |
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310 | DisposableIterator it = null;
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311 | try {
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312 | it = data.fastIterator(); |
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313 | synchronized (index) {
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314 | while (it.hasNext()) {
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315 | if (isCancellationRequested()) {
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316 | cancel(); |
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317 | return;
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318 | } |
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319 | Feature feat = (Feature) it.next(); |
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320 | index.delete(feat); |
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321 | } |
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322 | notify(FeatureStoreNotification.INDEX_FILLING_SUCCESS); |
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323 | } |
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324 | } catch (DataException e) {
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325 | throw new FeatureIndexException(e); |
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326 | } finally {
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327 | DisposeUtils.dispose(it); |
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328 | } |
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329 | } |
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330 | |||
331 | private void cancel() { |
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332 | notify(FeatureStoreNotification.INDEX_FILLING_CANCELLED); |
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333 | taskStatus.cancel(); |
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334 | } |
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335 | |||
336 | public void notifyOperationObserver(DataStoreNotification notification) { |
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337 | if (this.operationObserver != null) { |
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338 | this.operationObserver.update(index, notification);
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339 | } |
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340 | } |
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341 | |||
342 | private void notify(String notificationType) { |
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343 | DataStoreNotification notification = |
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344 | new DefaultFeatureStoreNotification(store, notificationType,
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345 | index); |
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346 | notifyOperationObserver(notification); |
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347 | index.notifyObservers(notification); |
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348 | } |
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349 | |||
350 | private void notify(String notificationType, Exception exception) { |
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351 | DataStoreNotification notification = |
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352 | new DefaultFeatureStoreNotification(store, notificationType,
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353 | exception); |
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354 | notifyOperationObserver(notification); |
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355 | index.notifyObservers(notification); |
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356 | } |
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357 | } |
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358 | |||
359 | private FeatureIndexOperationTask createIndexTask(int operation, |
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360 | FeatureSet data, Observer observer) {
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361 | synchronized (featureOperationTaskLock) {
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362 | if (featureIndexTask != null) { |
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363 | this.featureIndexTask.cancelRequest();
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364 | removeTask(this.featureIndexTask);
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365 | } |
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366 | FeatureIndexOperationTask fillingTask = |
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367 | new FeatureIndexOperationTask(this, |
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368 | featureStore.getFeatureStore(), operation, data, observer); |
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369 | this.featureIndexTask = fillingTask;
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370 | return fillingTask;
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371 | } |
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372 | } |
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373 | |||
374 | private void removeTask(FeatureIndexOperationTask task) { |
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375 | synchronized (featureOperationTaskLock) {
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376 | // Remove if it is not null and the same task
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377 | if (this.featureIndexTask == task) { |
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378 | featureIndexTask = null;
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379 | } |
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380 | } |
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381 | } |
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382 | |||
383 | public void fill() throws FeatureIndexException { |
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384 | fill(false, null); |
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385 | } |
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386 | |||
387 | public void fill(boolean background, Observer observer) |
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388 | throws FeatureIndexException {
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389 | FeatureIndexOperationTask task = |
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390 | createIndexTask(FeatureIndexOperationTask.OP_FILL, null, observer);
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391 | if (background) {
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392 | task.start(); |
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393 | } else {
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394 | task.run(); |
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395 | } |
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396 | } |
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397 | |||
398 | public final void insert(FeatureSet data) throws DataException { |
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399 | if (!isValid()) {
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400 | throw new InvalidFeatureIndexException(); |
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401 | } |
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402 | FeatureIndexOperationTask task = |
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403 | createIndexTask(FeatureIndexOperationTask.OP_INSERT_FSET, data, |
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404 | null);
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405 | task.run(); |
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406 | } |
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407 | |||
408 | public synchronized final void insert(Feature feat) throws DataException { |
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409 | try {
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410 | FeatureIndexProvider prov = getIndexProvider(); |
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411 | Object value = feat.get(getAttributeName());
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412 | 41610 | jjdelcerro | if(prov.allowNulls() || value != null ) { |
413 | 40435 | jjdelcerro | prov.insert(value, |
414 | (FeatureReferenceProviderServices) feat.getReference()); |
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415 | } |
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416 | } catch (NullPointerException e) { |
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417 | throw new IllegalArgumentException("Could not add Feature: " + feat |
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418 | + " to index " + this |
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419 | + ". It does not contain a column with name "
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420 | + getAttributeName()); |
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421 | } catch (ClassCastException e) { |
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422 | throw new IllegalArgumentException("Could not add Feature: " + feat |
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423 | + " to index " + this + ". Attribute " + getAttributeName() |
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424 | + " data type is not valid.");
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425 | } |
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426 | } |
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427 | |||
428 | public final void delete(FeatureSet data) throws FeatureIndexException { |
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429 | if (!isValid()) {
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430 | throw new InvalidFeatureIndexException(); |
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431 | } |
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432 | FeatureIndexOperationTask task = |
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433 | createIndexTask(FeatureIndexOperationTask.OP_DELETE_FSET, data, |
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434 | null);
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435 | task.run(); |
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436 | } |
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437 | |||
438 | public synchronized final void delete(Feature feat) throws DataException { |
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439 | getIndexProvider().delete(feat.get(getAttributeName()), |
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440 | (FeatureReferenceProviderServices) feat.getReference()); |
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441 | } |
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442 | |||
443 | private synchronized void clear() throws DataException { |
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444 | getIndexProvider().clear(); |
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445 | } |
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446 | |||
447 | public synchronized FeatureSet getMatchFeatureSet(Object value) |
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448 | throws FeatureIndexException {
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449 | if (!isValid()) {
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450 | throw new InvalidFeatureIndexException(); |
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451 | } |
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452 | return new IndexFeatureSet(this, new DefaultLongList( |
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453 | indexProvider.match(value))); |
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454 | } |
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455 | |||
456 | public synchronized FeatureSet getRangeFeatureSet(Object value1, |
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457 | Object value2) throws FeatureIndexException { |
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458 | if (!isValid()) {
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459 | throw new InvalidFeatureIndexException(); |
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460 | } |
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461 | return new IndexFeatureSet(this, new DefaultLongList( |
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462 | indexProvider.range(value1, value2))); |
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463 | } |
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464 | |||
465 | public synchronized FeatureSet getNearestFeatureSet(int count, Object value) |
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466 | throws FeatureIndexException {
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467 | if (!isValid()) {
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468 | throw new InvalidFeatureIndexException(); |
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469 | } |
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470 | return new IndexFeatureSet(this, new DefaultLongList( |
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471 | indexProvider.nearest(count, value))); |
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472 | } |
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473 | |||
474 | public synchronized FeatureSet getNearestFeatureSet(int count, |
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475 | Object value, Object tolerance) throws FeatureIndexException { |
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476 | if (!isValid()) {
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477 | throw new InvalidFeatureIndexException(); |
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478 | } |
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479 | return new IndexFeatureSet(this, new DefaultLongList( |
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480 | indexProvider.nearest(count, value, tolerance))); |
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481 | } |
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482 | |||
483 | public void initialize() throws InitializeException { |
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484 | indexProvider.setFeatureIndexProviderServices(this);
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485 | indexProvider.initialize(); |
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486 | } |
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487 | |||
488 | public List getAttributeNames() { |
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489 | return attributeNames;
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490 | } |
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491 | |||
492 | public String getNewFileName(String prefix, String sufix) { |
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493 | int n = 0; |
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494 | File file = new File(prefix + getName(), sufix); |
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495 | while (file.exists()) {
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496 | n++; |
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497 | file = new File(prefix + getName() + n, sufix); |
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498 | } |
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499 | return file.getAbsolutePath();
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500 | } |
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501 | |||
502 | public String getFileName() { |
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503 | // TODO Auto-generated method stub
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504 | return null; |
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505 | } |
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506 | |||
507 | public String getTemporaryFileName() { |
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508 | // TODO Auto-generated method stub
|
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509 | return null; |
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510 | } |
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511 | |||
512 | |||
513 | public FeatureIndexProvider getFeatureIndexProvider() {
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514 | return this.indexProvider; |
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515 | } |
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516 | |||
517 | public boolean isFilling() { |
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518 | synchronized (featureOperationTaskLock) {
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519 | return featureIndexTask != null; |
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520 | } |
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521 | } |
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522 | |||
523 | public boolean isValid() { |
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524 | synchronized (featureOperationTaskLock) {
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525 | return !isFilling() && valid;
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526 | } |
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527 | } |
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528 | |||
529 | public synchronized void waitForIndex() { |
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530 | // Nothing to do, this is just used for anyone to block until the index
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531 | // has finished being used by a FeatureIndexOperation.
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532 | LOG.debug("Wait finished for index: {}", this); |
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533 | } |
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534 | |||
535 | public void setValid(boolean valid) { |
||
536 | synchronized (featureOperationTaskLock) {
|
||
537 | this.valid = valid;
|
||
538 | } |
||
539 | } |
||
540 | |||
541 | protected void doDispose() throws BaseException { |
||
542 | synchronized (featureOperationTaskLock) {
|
||
543 | setValid(false);
|
||
544 | if (this.featureIndexTask != null) { |
||
545 | this.featureIndexTask.cancelRequest();
|
||
546 | this.featureIndexTask = null; |
||
547 | } |
||
548 | } |
||
549 | // Wait for any task until it finishes running
|
||
550 | synchronized (this) { |
||
551 | return;
|
||
552 | } |
||
553 | } |
||
554 | |||
555 | public String toString() { |
||
556 | return "Feature index with name" + indexName |
||
557 | + ", for the FeatureType: " + featureType + ", and the attribute: " |
||
558 | + attributeName; |
||
559 | } |
||
560 | |||
561 | public void notifyObservers(Object notification) { |
||
562 | observable.notifyObservers(notification); |
||
563 | } |
||
564 | |||
565 | public String getName() { |
||
566 | return indexName;
|
||
567 | } |
||
568 | |||
569 | private FeatureIndexProvider getIndexProvider() {
|
||
570 | return indexProvider;
|
||
571 | } |
||
572 | |||
573 | public void addObserver(Observer observer) { |
||
574 | observable.addObserver(observer); |
||
575 | } |
||
576 | |||
577 | public void deleteObserver(Observer observer) { |
||
578 | observable.deleteObserver(observer); |
||
579 | } |
||
580 | |||
581 | public void deleteObservers() { |
||
582 | observable.deleteObservers(); |
||
583 | } |
||
584 | |||
585 | } |