svn-gvsig-desktop / tags / J2ME_compat_v1_2_Build_1209 / libraries / libFMap / src / com / iver / cit / gvsig / fmap / layers / VectorialFileAdapter.java @ 19509
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1 | 19509 | jcarrasco | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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2 | *
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3 | * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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4 | *
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5 | * This program is free software; you can redistribute it and/or
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6 | * modify it under the terms of the GNU General Public License
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7 | * as published by the Free Software Foundation; either version 2
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8 | * of the License, or (at your option) any later version.
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9 | *
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10 | * This program is distributed in the hope that it will be useful,
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 | * GNU General Public License for more details.
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14 | *
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15 | * You should have received a copy of the GNU General Public License
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16 | * along with this program; if not, write to the Free Software
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17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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18 | *
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19 | * For more information, contact:
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20 | *
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21 | * Generalitat Valenciana
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22 | * Conselleria d'Infraestructures i Transport
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23 | * Av. Blasco Ib??ez, 50
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24 | * 46010 VALENCIA
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25 | * SPAIN
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26 | *
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27 | * +34 963862235
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28 | * gvsig@gva.es
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29 | * www.gvsig.gva.es
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30 | *
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31 | * or
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32 | *
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33 | * IVER T.I. S.A
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34 | * Salamanca 50
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35 | * 46005 Valencia
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36 | * Spain
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37 | *
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38 | * +34 963163400
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39 | * dac@iver.es
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40 | */
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41 | package com.iver.cit.gvsig.fmap.layers; |
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42 | |||
43 | import java.io.File; |
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44 | |||
45 | import com.hardcode.driverManager.DriverLoadException; |
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46 | import com.hardcode.gdbms.driver.exceptions.CloseDriverException; |
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47 | import com.hardcode.gdbms.driver.exceptions.InitializeDriverException; |
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48 | import com.hardcode.gdbms.driver.exceptions.ReadDriverException; |
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49 | import com.hardcode.gdbms.engine.data.DataSource; |
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50 | import com.hardcode.gdbms.engine.data.DataSourceFactory; |
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51 | import com.hardcode.gdbms.engine.data.NoSuchTableException; |
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52 | import com.hardcode.gdbms.engine.data.driver.ObjectDriver; |
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53 | import com.hardcode.gdbms.engine.values.Value; |
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54 | import com.iver.cit.gvsig.fmap.core.DefaultFeature; |
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55 | import com.iver.cit.gvsig.fmap.core.IFeature; |
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56 | import com.iver.cit.gvsig.fmap.core.IGeometry; |
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57 | import com.iver.cit.gvsig.fmap.drivers.ExternalData; |
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58 | import com.iver.cit.gvsig.fmap.drivers.VectorialFileDriver; |
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59 | |||
60 | |||
61 | /**
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62 | * Adapta un driver de fichero vectorial a la interfaz vectorial, manteniendo
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63 | * adem?s el estado necesario por una capa vectorial de fichero (el nombre del
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64 | * fichero)
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65 | */
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66 | public class VectorialFileAdapter extends VectorialAdapter { |
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67 | private boolean driverInitialized = false; |
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68 | private File file; |
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69 | private SelectableDataSource ds;
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70 | private String dataSourceName; |
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71 | |||
72 | /**
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73 | * <code>reference_count</code> lleva un contador de referencias a este
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74 | * adaptador, de forma que si la cuenta de referencias no es cero, no
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75 | * abrimos otra vez el adaptador porque se supone que est? abierto.
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76 | */
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77 | private int reference_count = 0; |
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78 | |||
79 | /**
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80 | * Crea un nuevo VectorialFileAdapter.
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81 | *
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82 | * @param file Fichero.
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83 | */
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84 | public VectorialFileAdapter(File file) { |
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85 | this.file = file;
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86 | } |
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87 | |||
88 | /**
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89 | * Devuelve driver.
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90 | *
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91 | * @return VectorialFileDriver.
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92 | */
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93 | VectorialFileDriver getFileDriver() { |
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94 | return (VectorialFileDriver) getDriver();
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95 | } |
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96 | |||
97 | /**
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98 | * incrementa el contador de las veces que se ha abierto el fichero.
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99 | * Solamente cuando el contador est? a cero pide al driver que abra el
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100 | * fichero
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101 | * @throws InitializeDriverException
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102 | */
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103 | public synchronized void start() throws ReadDriverException, InitializeDriverException { |
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104 | if (reference_count == 0) |
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105 | { |
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106 | getFileDriver().open(file); |
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107 | |||
108 | if (!driverInitialized) {
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109 | getFileDriver().initialize(); |
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110 | driverInitialized = true;
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111 | } |
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112 | getRecordset().start(); |
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113 | } |
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114 | reference_count++; |
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115 | } |
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116 | |||
117 | /**
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118 | * decrementa el contador de n?mero de aperturas y cuando llega a cero pide
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119 | * al driver que cierre el fichero
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120 | */
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121 | public synchronized void stop() throws ReadDriverException { |
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122 | try {
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123 | if (reference_count == 0) |
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124 | { |
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125 | getFileDriver().close(); |
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126 | } |
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127 | else
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128 | if (reference_count < 0) |
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129 | throw new RuntimeException("Contador de referencias de driver =" |
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130 | + reference_count + ". Demasiados stop().");
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131 | reference_count--; |
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132 | } catch (CloseDriverException e) {
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133 | throw new ReadDriverException(getDriver().getName(),e); |
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134 | } |
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135 | } |
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136 | |||
137 | /**
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138 | * Is synchronized to allow thread safe access to features stored
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139 | * in files.
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140 | *
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141 | * @see com.iver.cit.gvsig.fmap.layers.ReadableVectorial#getShape(int)
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142 | */
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143 | public synchronized IGeometry getShape(int index) throws ReadDriverException { |
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144 | return getFileDriver().getShape(index);
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145 | } |
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146 | |||
147 | /**
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148 | * @see com.iver.cit.gvsig.fmap.layers.ReadableVectorial#getShapeType()
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149 | */
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150 | public int getShapeType() throws ReadDriverException { |
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151 | return getFileDriver().getShapeType();
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152 | } |
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153 | |||
154 | /**
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155 | * @throws ReadDriverException
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156 | * @see com.iver.cit.gvsig.fmap.layers.VectorialAdapter#getRecordset()
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157 | */
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158 | public SelectableDataSource getRecordset() throws ReadDriverException { |
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159 | String name =null; |
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160 | try {
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161 | if (ds == null) { |
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162 | VectorialFileDriver driver = (VectorialFileDriver) getDriver(); |
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163 | |||
164 | if (driver instanceof ExternalData) { |
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165 | ExternalData ed = (ExternalData) driver; |
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166 | File dataFile = ed.getDataFile(file);
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167 | String driverName = ed.getDataDriverName();
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168 | |||
169 | name = LayerFactory.getDataSourceFactory().addFileDataSource(driverName, |
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170 | dataFile.getAbsolutePath()); |
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171 | ds = new SelectableDataSource(LayerFactory.getDataSourceFactory().createRandomDataSource(name, DataSourceFactory.AUTOMATIC_OPENING));
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172 | } else if (driver instanceof ObjectDriver) { |
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173 | name = LayerFactory.getDataSourceFactory().addDataSource((ObjectDriver)driver); |
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174 | ds = new SelectableDataSource(LayerFactory.getDataSourceFactory().createRandomDataSource(name, DataSourceFactory.AUTOMATIC_OPENING));
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175 | } else {
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176 | return null; |
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177 | } |
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178 | } |
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179 | } catch (NoSuchTableException e) {
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180 | throw new RuntimeException( |
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181 | "Error de implementaci?n, se ha a?adido una tabla y luego esa tabla no ha podido ser cargada");
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182 | } catch (DriverLoadException e) {
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183 | throw new ReadDriverException(name,e); |
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184 | } |
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185 | |||
186 | return ds;
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187 | } |
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188 | |||
189 | /**
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190 | * Devuelve el fichero.
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191 | *
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192 | * @return Fichero.
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193 | */
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194 | public File getFile() { |
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195 | return file;
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196 | } |
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197 | /**
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198 | * Returns the feature whose index is numReg
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199 | * <br>
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200 | * Is synchronized to do thread safe accessing to features
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201 | * stored in files.
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202 | * @param numReg index of feature
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203 | * @return feature
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204 | *
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205 | */
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206 | public synchronized IFeature getFeature(int numReg) throws ReadDriverException |
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207 | { |
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208 | IGeometry geom; |
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209 | IFeature feat = null;
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210 | geom = getShape(numReg); |
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211 | DataSource rs = getRecordset();
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212 | Value[] regAtt = new Value[rs.getFieldCount()]; |
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213 | for (int fieldId=0; fieldId < rs.getFieldCount(); fieldId++ ) |
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214 | { |
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215 | regAtt[fieldId] = rs.getFieldValue(numReg, fieldId); |
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216 | } |
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217 | feat = new DefaultFeature(geom, regAtt, "" + numReg); |
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218 | return feat;
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219 | } |
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220 | |||
221 | } |