svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.file / org.gvsig.fmap.dal.file.csv / src / main / java / org / gvsig / fmap / dal / store / simplereader / SimpleReaderSetProvider.java @ 47652
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1 | 40435 | jjdelcerro | /**
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2 | 40559 | jjdelcerro | * 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 | *
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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 | 40435 | jjdelcerro | */
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24 | 47634 | fdiaz | package org.gvsig.fmap.dal.store.simplereader; |
25 | 40435 | jjdelcerro | |
26 | 47638 | jjdelcerro | import org.gvsig.fmap.dal.store.csv.CSVStoreProvider; |
27 | 47199 | jjdelcerro | import java.util.Iterator; |
28 | 45727 | jjdelcerro | import java.util.List; |
29 | 40435 | jjdelcerro | import java.util.NoSuchElementException; |
30 | import org.gvsig.fmap.dal.exception.DataException; |
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31 | import org.gvsig.fmap.dal.exception.ReadRuntimeException; |
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32 | import org.gvsig.fmap.dal.feature.FeatureQuery; |
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33 | import org.gvsig.fmap.dal.feature.FeatureType; |
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34 | import org.gvsig.fmap.dal.feature.spi.AbstractFeatureProviderIterator; |
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35 | import org.gvsig.fmap.dal.feature.spi.AbstractFeatureSetProvider; |
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36 | import org.gvsig.fmap.dal.feature.spi.FeatureProvider; |
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37 | 47636 | fdiaz | import org.gvsig.fmap.dal.store.csv.*; |
38 | 40435 | jjdelcerro | import org.gvsig.tools.exception.BaseException; |
39 | |||
40 | /**
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41 | * @author jjdelcerro
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42 | *
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43 | */
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44 | 47634 | fdiaz | public class SimpleReaderSetProvider extends AbstractFeatureSetProvider { |
45 | 40435 | jjdelcerro | |
46 | 47634 | fdiaz | private static class SimpleReaderFeatureProvider extends AbstractFeatureProviderLoadedOnDemand { |
47 | 40435 | jjdelcerro | |
48 | 47634 | fdiaz | protected SimpleReaderStoreProvider store;
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49 | 40435 | jjdelcerro | |
50 | 47634 | fdiaz | public SimpleReaderFeatureProvider(SimpleReaderStoreProvider store, FeatureType type) {
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51 | 45727 | jjdelcerro | super(type);
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52 | this.store = store;
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53 | } |
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54 | 40435 | jjdelcerro | |
55 | 45727 | jjdelcerro | @Override
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56 | protected void doLoad() { |
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57 | 47652 | fdiaz | long index=-1; |
58 | 45727 | jjdelcerro | try {
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59 | 47652 | fdiaz | index = this.getOID();
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60 | 47634 | fdiaz | SimpleReaderStoreProvider.RowToFeatureTranslator translator = this.store.getRowToFeatureTranslator();
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61 | 45727 | jjdelcerro | List<String> row = this.store.getRowByIndex(index); |
62 | translator.translate(index, row, this);
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63 | 47652 | fdiaz | } catch (Throwable ex) { |
64 | throw new ReadRuntimeException(getStoreFullName(), index, ex); |
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65 | 45727 | jjdelcerro | } |
66 | } |
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67 | 40435 | jjdelcerro | |
68 | 45727 | jjdelcerro | @Override
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69 | public Long getOID() { |
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70 | return (Long) super.getOID(); |
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71 | } |
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72 | 40435 | jjdelcerro | |
73 | 45727 | jjdelcerro | public void setOID(long oid) { |
74 | super.setOID(oid);
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75 | } |
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76 | 40435 | jjdelcerro | |
77 | 45727 | jjdelcerro | private String getStoreFullName() { |
78 | try {
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79 | return this.store.getFullName(); |
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80 | } catch (Exception ex) { |
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81 | return "unknown"; |
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82 | } |
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83 | } |
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84 | 40435 | jjdelcerro | |
85 | 45727 | jjdelcerro | } |
86 | 47634 | fdiaz | private class SimpleReaderIterator extends AbstractFeatureProviderIterator { |
87 | 40435 | jjdelcerro | |
88 | 45727 | jjdelcerro | protected long index; |
89 | protected FeatureType type;
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90 | protected long count; |
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91 | 47199 | jjdelcerro | protected final FeatureQuery query; |
92 | protected Iterator spatialIndexIt; |
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93 | 40435 | jjdelcerro | |
94 | 47634 | fdiaz | public SimpleReaderIterator(SimpleReaderStoreProvider store, FeatureQuery query, FeatureType type,
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95 | 45727 | jjdelcerro | long startOn) throws DataException { |
96 | super(store);
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97 | this.index = startOn;
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98 | this.type = type;
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99 | 47199 | jjdelcerro | this.query = query;
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100 | 45727 | jjdelcerro | this.count = store.getFeatureCount();
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101 | 47199 | jjdelcerro | if( this.query!=null ) { |
102 | this.spatialIndexIt = createSpatialIterator(
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103 | store.getFeatureStore().getDefaultFeatureTypeQuietly(), |
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104 | query, |
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105 | store.getSpatialIndex() |
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106 | ); |
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107 | } |
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108 | 45727 | jjdelcerro | } |
109 | 40435 | jjdelcerro | |
110 | 45727 | jjdelcerro | @Override
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111 | 47199 | jjdelcerro | protected CSVStoreProvider getFeatureStoreProvider() {
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112 | return (CSVStoreProvider) super.getFeatureStoreProvider(); |
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113 | } |
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114 | |||
115 | @Override
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116 | 45727 | jjdelcerro | protected boolean internalHasNext() { |
117 | 47199 | jjdelcerro | if( this.spatialIndexIt != null ) { |
118 | return this.spatialIndexIt.hasNext(); |
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119 | } |
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120 | 45727 | jjdelcerro | return this.count > index; |
121 | } |
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122 | 40435 | jjdelcerro | |
123 | 45727 | jjdelcerro | @Override
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124 | protected FeatureProvider internalNext() {
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125 | 47634 | fdiaz | SimpleReaderFeatureProvider data = new SimpleReaderFeatureProvider(getStore(), type);
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126 | 47199 | jjdelcerro | if( this.spatialIndexIt != null ) { |
127 | Object oid = this.spatialIndexIt.next(); |
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128 | data.setOID(oid); |
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129 | } else {
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130 | if (index >= this.count) { |
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131 | throw new NoSuchElementException(); |
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132 | } |
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133 | data.setOID(index++); |
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134 | } |
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135 | 45727 | jjdelcerro | return data;
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136 | } |
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137 | 40435 | jjdelcerro | |
138 | 45727 | jjdelcerro | @Override
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139 | public void remove() { |
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140 | throw new UnsupportedOperationException(); |
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141 | } |
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142 | 40435 | jjdelcerro | |
143 | 45727 | jjdelcerro | protected void internalDispose() { |
144 | type = null;
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145 | } |
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146 | 40435 | jjdelcerro | |
147 | 45727 | jjdelcerro | @Override
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148 | protected void doDispose() throws BaseException { |
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149 | // Nothing to do
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150 | } |
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151 | } |
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152 | 40435 | jjdelcerro | |
153 | 47634 | fdiaz | private class FastCSVIterator extends SimpleReaderIterator { |
154 | 40435 | jjdelcerro | |
155 | 45727 | jjdelcerro | protected FeatureProvider data;
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156 | 40435 | jjdelcerro | |
157 | 47634 | fdiaz | public FastCSVIterator(SimpleReaderStoreProvider store, FeatureQuery query, FeatureType type,
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158 | 45727 | jjdelcerro | long startOn) throws DataException { |
159 | 47199 | jjdelcerro | super(store, query, type, startOn);
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160 | 47634 | fdiaz | this.data = new SimpleReaderFeatureProvider(store, type); |
161 | 45727 | jjdelcerro | } |
162 | 40435 | jjdelcerro | |
163 | 45727 | jjdelcerro | @Override
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164 | protected FeatureProvider internalNext() {
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165 | 47199 | jjdelcerro | if( this.spatialIndexIt != null ) { |
166 | Object oid = this.spatialIndexIt.next(); |
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167 | data.setOID(oid); |
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168 | } else {
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169 | if (index >= this.count) { |
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170 | throw new NoSuchElementException(); |
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171 | } |
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172 | data.setOID(index++); |
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173 | } |
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174 | return data;
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175 | 45727 | jjdelcerro | } |
176 | 40435 | jjdelcerro | |
177 | 45727 | jjdelcerro | @Override
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178 | protected void internalDispose() { |
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179 | super.internalDispose();
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180 | data = null;
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181 | } |
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182 | } |
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183 | 40435 | jjdelcerro | |
184 | 47634 | fdiaz | public SimpleReaderSetProvider(SimpleReaderStoreProvider store, FeatureQuery query,
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185 | 47557 | fdiaz | FeatureType providerFeatureType, FeatureType featureType) |
186 | 45727 | jjdelcerro | throws DataException {
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187 | 47557 | fdiaz | super(store, query, providerFeatureType, featureType);
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188 | 45727 | jjdelcerro | } |
189 | 40435 | jjdelcerro | |
190 | 45727 | jjdelcerro | @Override
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191 | 47634 | fdiaz | protected SimpleReaderStoreProvider getStore() {
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192 | return (SimpleReaderStoreProvider) super.getStore(); |
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193 | 45727 | jjdelcerro | } |
194 | 40435 | jjdelcerro | |
195 | 45727 | jjdelcerro | protected String getStoreFullName() { |
196 | try {
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197 | return this.getStore().getFullName(); |
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198 | } catch (Throwable th) { |
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199 | return "unknown"; |
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200 | } |
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201 | } |
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202 | |||
203 | @Override
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204 | public boolean canFilter() { |
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205 | return false; |
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206 | } |
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207 | |||
208 | @Override
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209 | public boolean canIterateFromIndex() { |
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210 | return true; |
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211 | } |
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212 | |||
213 | @Override
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214 | public boolean canOrder() { |
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215 | return false; |
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216 | } |
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217 | |||
218 | @Override
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219 | public long getSize() throws DataException { |
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220 | return getStore().getFeatureCount();
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221 | } |
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222 | |||
223 | @Override
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224 | public boolean isEmpty() throws DataException { |
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225 | return getSize() == 0; |
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226 | } |
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227 | |||
228 | @Override
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229 | protected void doDispose() throws BaseException { |
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230 | } |
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231 | |||
232 | @Override
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233 | protected AbstractFeatureProviderIterator createIterator(long index) |
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234 | throws DataException {
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235 | 47634 | fdiaz | return new SimpleReaderIterator( |
236 | 45727 | jjdelcerro | getStore(), |
237 | 47199 | jjdelcerro | getQuery(), |
238 | 47436 | fdiaz | getProviderFeatureType(), |
239 | 45727 | jjdelcerro | index |
240 | ); |
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241 | } |
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242 | |||
243 | @Override
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244 | protected AbstractFeatureProviderIterator createFastIterator(long index) |
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245 | throws DataException {
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246 | return new FastCSVIterator( |
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247 | getStore(), |
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248 | 47199 | jjdelcerro | getQuery(), |
249 | 47436 | fdiaz | getProviderFeatureType(), |
250 | 45727 | jjdelcerro | index |
251 | ); |
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252 | } |
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253 | 40767 | jjdelcerro | } |