svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.impl / src / main / java / org / gvsig / fmap / dal / feature / impl / featureset / AbstractFeatureSet.java @ 47436
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1 | 43089 | jjdelcerro | /**
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2 | * gvSIG. Desktop Geographic Information System.
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3 | *
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4 | * Copyright (C) 2007-2013 gvSIG Association.
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5 | *
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6 | * This program is free software; you can redistribute it and/or
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7 | * modify it under the terms of the GNU General Public License
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8 | * as published by the Free Software Foundation; either version 3
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9 | * of the License, or (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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19 | * MA 02110-1301, USA.
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20 | *
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21 | * For any additional information, do not hesitate to contact us
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22 | * at info AT gvsig.com, or visit our website www.gvsig.com.
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23 | */
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24 | package org.gvsig.fmap.dal.feature.impl.featureset; |
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25 | |||
26 | 45100 | jjdelcerro | import java.util.Iterator; |
27 | 44655 | jjdelcerro | import javax.json.Json; |
28 | import javax.json.JsonArray; |
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29 | import javax.json.JsonArrayBuilder; |
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30 | import javax.json.JsonObject; |
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31 | 47049 | jjdelcerro | import org.apache.commons.lang3.mutable.MutableInt; |
32 | import org.gvsig.expressionevaluator.Expression; |
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33 | import org.gvsig.expressionevaluator.ExpressionBuilder; |
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34 | import org.gvsig.expressionevaluator.ExpressionUtils; |
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35 | 43089 | jjdelcerro | import org.gvsig.fmap.dal.DataStore; |
36 | import org.gvsig.fmap.dal.exception.DataException; |
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37 | 47049 | jjdelcerro | import org.gvsig.fmap.dal.feature.DisposableFeatureSetIterable; |
38 | 43089 | jjdelcerro | import org.gvsig.fmap.dal.feature.Feature; |
39 | 47049 | jjdelcerro | import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor; |
40 | 43089 | jjdelcerro | import org.gvsig.fmap.dal.feature.FeatureSet; |
41 | import org.gvsig.fmap.dal.feature.FeatureStore; |
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42 | 47049 | jjdelcerro | import org.gvsig.fmap.dal.feature.FeatureType; |
43 | 44655 | jjdelcerro | import org.gvsig.fmap.dal.feature.impl.DefaultFeature; |
44 | 43089 | jjdelcerro | import org.gvsig.fmap.dal.feature.impl.dynobjectutils.DynObjectSetFeatureSetFacade; |
45 | import org.gvsig.tools.dispose.DisposableIterator; |
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46 | import org.gvsig.tools.dispose.DisposeUtils; |
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47 | import org.gvsig.tools.dynobject.DynObjectSet; |
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48 | import org.gvsig.tools.exception.BaseException; |
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49 | import org.gvsig.tools.visitor.VisitCanceledException; |
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50 | import org.gvsig.tools.visitor.Visitor; |
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51 | import org.gvsig.tools.visitor.impl.AbstractIndexedVisitable; |
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52 | 43358 | jjdelcerro | import org.slf4j.Logger; |
53 | import org.slf4j.LoggerFactory; |
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54 | 43089 | jjdelcerro | |
55 | |||
56 | 47049 | jjdelcerro | @SuppressWarnings("UseSpecificCatch") |
57 | 43089 | jjdelcerro | public abstract class AbstractFeatureSet |
58 | extends AbstractIndexedVisitable
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59 | implements FeatureSet {
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60 | |||
61 | 47049 | jjdelcerro | private static final Logger LOGGER = LoggerFactory.getLogger(AbstractFeatureSet.class); |
62 | |||
63 | 45195 | omartinez | private static class DisposableFeatureSetIterableImpl implements DisposableFeatureSetIterable { |
64 | 45100 | jjdelcerro | |
65 | private final FeatureSet fset; |
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66 | private final DisposableIterator it; |
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67 | |||
68 | 45195 | omartinez | public DisposableFeatureSetIterableImpl(FeatureSet fset, DisposableIterator it) {
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69 | 45100 | jjdelcerro | this.fset = fset;
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70 | 45195 | omartinez | // No se debe de hacer el bind. DisposeUtils.bind(fset);
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71 | 45100 | jjdelcerro | this.it = it;
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72 | } |
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73 | |||
74 | @Override
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75 | public boolean hasNext() { |
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76 | return this.it.hasNext(); |
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77 | } |
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78 | |||
79 | @Override
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80 | public Feature next() {
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81 | return (Feature) this.it.next(); |
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82 | } |
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83 | |||
84 | @Override
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85 | public Iterator<Feature> iterator() { |
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86 | return this.it; |
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87 | } |
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88 | |||
89 | @Override
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90 | public void dispose() { |
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91 | DisposeUtils.disposeQuietly(this.it);
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92 | DisposeUtils.disposeQuietly(this.fset);
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93 | } |
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94 | 45195 | omartinez | |
95 | @Override
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96 | 45425 | jjdelcerro | public boolean isEmpty() { |
97 | 45195 | omartinez | return this.fset.isEmpty(); |
98 | } |
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99 | |||
100 | @Override
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101 | public long size64() { |
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102 | return this.fset.size64(); |
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103 | } |
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104 | 45541 | fdiaz | |
105 | @Override
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106 | public FeatureSet getFeatureSet() {
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107 | return this.fset; |
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108 | } |
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109 | 45100 | jjdelcerro | |
110 | 45541 | fdiaz | |
111 | 45100 | jjdelcerro | } |
112 | |||
113 | 43358 | jjdelcerro | protected static final Logger LOG = LoggerFactory.getLogger(AbstractFeatureSet.class); |
114 | |||
115 | 47049 | jjdelcerro | @Override
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116 | 43089 | jjdelcerro | public abstract FeatureStore getFeatureStore(); |
117 | |||
118 | @Override
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119 | 43358 | jjdelcerro | public final void accept(Visitor visitor, long firstValueIndex, long elements) throws BaseException { |
120 | try {
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121 | doAccept(visitor, firstValueIndex, elements); |
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122 | } catch (VisitCanceledException ex) {
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123 | // The visit has been cancelled by the visitor, so we finish here.
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124 | 47049 | jjdelcerro | LOG.debug("The visit, beggining on position {}, has been cancelled "
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125 | + "by the visitor: {}", firstValueIndex,
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126 | 43358 | jjdelcerro | visitor); |
127 | } |
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128 | } |
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129 | |||
130 | @Override
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131 | 43089 | jjdelcerro | protected void doAccept(Visitor visitor, long firstValueIndex) |
132 | throws VisitCanceledException, BaseException {
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133 | 43358 | jjdelcerro | doAccept(visitor, firstValueIndex, 0);
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134 | } |
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135 | |||
136 | protected void doAccept(Visitor visitor, long firstValueIndex, long elements) |
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137 | throws VisitCanceledException, BaseException {
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138 | DisposableIterator iterator = fastIterator(firstValueIndex, elements); |
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139 | |||
140 | try {
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141 | while (iterator.hasNext()) {
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142 | Feature feature = (Feature) iterator.next(); |
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143 | visitor.visit(feature); |
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144 | 43089 | jjdelcerro | } |
145 | 43358 | jjdelcerro | } finally {
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146 | iterator.dispose(); |
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147 | 43089 | jjdelcerro | } |
148 | } |
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149 | 43358 | jjdelcerro | |
150 | 43089 | jjdelcerro | @Override
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151 | public Feature first() {
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152 | DisposableIterator it = null;
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153 | try {
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154 | it = this.iterator();
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155 | if( it == null ) { |
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156 | return null; |
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157 | } |
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158 | 44100 | jjdelcerro | if( it.hasNext() ) {
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159 | Feature f = (Feature) it.next(); |
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160 | return f;
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161 | } |
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162 | return null; |
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163 | 43089 | jjdelcerro | } finally {
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164 | DisposeUtils.disposeQuietly(it); |
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165 | } |
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166 | } |
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167 | |||
168 | @Override
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169 | 45425 | jjdelcerro | public boolean isEmpty() { |
170 | return this.size64() == 0; |
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171 | 43089 | jjdelcerro | } |
172 | |||
173 | @Override
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174 | public DisposableIterator fastIterator() throws DataException { |
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175 | return this.fastIterator(0); |
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176 | } |
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177 | |||
178 | @Override
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179 | public DisposableIterator iterator() {
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180 | try {
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181 | return this.fastIterator(0); |
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182 | } catch (DataException ex) {
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183 | 45195 | omartinez | throw new RuntimeException("Can't obtain iterator.",ex); |
184 | 43089 | jjdelcerro | } |
185 | } |
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186 | 45100 | jjdelcerro | |
187 | @Override
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188 | 45195 | omartinez | public DisposableFeatureSetIterable iterable() {
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189 | return iterable(true); |
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190 | 45100 | jjdelcerro | } |
191 | 43089 | jjdelcerro | |
192 | @Override
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193 | 45195 | omartinez | public DisposableFeatureSetIterable iterable(boolean disposeFeatureSet) { |
194 | if (!disposeFeatureSet) {
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195 | DisposeUtils.bind(this);
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196 | } |
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197 | return new DisposableFeatureSetIterableImpl(this, this.iterator()); |
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198 | } |
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199 | @Override
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200 | 43089 | jjdelcerro | public DynObjectSet getDynObjectSet() {
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201 | return this.getDynObjectSet(true); |
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202 | } |
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203 | |||
204 | @Override
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205 | public DynObjectSet getDynObjectSet(boolean fast) { |
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206 | return new DynObjectSetFeatureSetFacade(this, this.getFeatureStore(), fast); |
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207 | } |
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208 | |||
209 | @Override
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210 | public boolean isFromStore(DataStore store) { |
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211 | return this.getFeatureStore().equals(store); |
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212 | } |
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213 | 44390 | jjdelcerro | |
214 | @Override
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215 | public long size64() { |
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216 | try {
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217 | return this.getSize(); |
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218 | } catch (DataException ex) {
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219 | throw new RuntimeException("Can't get size",ex); |
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220 | } |
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221 | } |
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222 | |||
223 | @Override
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224 | public int size() { |
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225 | try {
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226 | long sz = this.getSize(); |
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227 | if( sz > Integer.MAX_VALUE ) { |
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228 | return Integer.MAX_VALUE; |
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229 | } |
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230 | return (int) sz; |
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231 | } catch (DataException ex) {
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232 | throw new RuntimeException("Can't get size",ex); |
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233 | } |
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234 | } |
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235 | |||
236 | 45696 | jjdelcerro | @Override
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237 | public JsonArray toJson() {
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238 | JsonArrayBuilder builder = this.toJsonBuilder();
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239 | return builder.build();
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240 | } |
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241 | |||
242 | @Override
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243 | public JsonArrayBuilder toJsonBuilder() {
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244 | 44655 | jjdelcerro | // TODO: estaria bien hacer una implementacion alternativa que devolviese
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245 | // un JsonArray basado en el FeatureSet/FeaturePagingHelper, asi no
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246 | // tendria que construirse en memoria el JSON entero.
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247 | try {
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248 | JsonArrayBuilder builder = Json.createArrayBuilder(); |
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249 | 47049 | jjdelcerro | this.accept((Object obj) -> { |
250 | DefaultFeature f = (DefaultFeature) obj; |
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251 | JsonObject fjson = f.toJson(); |
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252 | builder.add(fjson); |
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253 | 44655 | jjdelcerro | }); |
254 | 45696 | jjdelcerro | return builder;
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255 | 44655 | jjdelcerro | } catch (Exception ex) { |
256 | throw new RuntimeException("Can't create JSON array.",ex); |
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257 | } |
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258 | } |
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259 | 45696 | jjdelcerro | |
260 | @Deprecated
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261 | 47049 | jjdelcerro | @Override
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262 | 45696 | jjdelcerro | public JsonArray toJSON() {
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263 | return this.toJson(); |
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264 | } |
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265 | 47049 | jjdelcerro | |
266 | @Override
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267 | public Expression makeFilter(int maxfeatures) { |
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268 | try {
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269 | FeatureType ftype = this.getDefaultFeatureType();
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270 | if( !ftype.hasPrimaryKey() ) {
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271 | return null; |
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272 | } |
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273 | ExpressionBuilder builder = ExpressionUtils.createExpressionBuilder(); |
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274 | final MutableInt counter = new MutableInt(0); |
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275 | this.accept((Object obj) -> { |
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276 | 47436 | fdiaz | if( counter.getAndIncrement()>=maxfeatures ) {
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277 | 47049 | jjdelcerro | throw new VisitCanceledException(); |
278 | } |
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279 | Feature feature = (Feature) obj; |
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280 | for (FeatureAttributeDescriptor attrdesc : ftype.getPrimaryKey()) {
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281 | 47436 | fdiaz | builder.or( |
282 | 47049 | jjdelcerro | builder.eq( |
283 | builder.column(attrdesc.getName()), |
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284 | builder.constant(feature.get(attrdesc.getName())) |
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285 | ) |
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286 | ); |
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287 | } |
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288 | }); |
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289 | Expression filter = ExpressionUtils.createExpression(builder.toString());
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290 | return filter;
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291 | } catch (Exception ex) { |
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292 | LOGGER.warn("Can't build filter expression.", ex);
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293 | return null; |
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294 | } |
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295 | } |
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296 | |||
297 | 43089 | jjdelcerro | } |