svn-gvsig-desktop / tags / J2ME_compat_v1_2_Build_1209 / libraries / libFMap / src / com / iver / cit / gvsig / fmap / layers / ReadableVectorial.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.awt.geom.Rectangle2D; |
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44 | |||
45 | import org.cresques.cts.IProjection; |
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46 | |||
47 | import com.hardcode.gdbms.driver.exceptions.InitializeDriverException; |
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48 | import com.hardcode.gdbms.driver.exceptions.OpenDriverException; |
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49 | import com.hardcode.gdbms.driver.exceptions.ReadDriverException; |
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50 | import com.iver.cit.gvsig.exceptions.expansionfile.ExpansionFileReadException; |
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51 | import com.iver.cit.gvsig.fmap.core.IFeature; |
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52 | import com.iver.cit.gvsig.fmap.core.IGeometry; |
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53 | import com.iver.cit.gvsig.fmap.drivers.DriverAttributes; |
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54 | import com.iver.cit.gvsig.fmap.drivers.IFeatureIterator; |
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55 | import com.iver.cit.gvsig.fmap.drivers.VectorialDriver; |
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56 | import com.iver.cit.gvsig.fmap.spatialindex.ISpatialIndex; |
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57 | |||
58 | |||
59 | /**
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60 | * Interfaz usada internamente para acceder a fuentes de datos vectoriales en
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61 | * modo lectura
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62 | */
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63 | public interface ReadableVectorial { |
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64 | /**
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65 | * Indica que se va a comenzar a hacer una serie de operaciones sobre el
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66 | * origen de datos con la finalidad de que dicho origen de datos se
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67 | * prepare (abra el fichero, comience una transacci?n, conecte al
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68 | * servidor, ...). Abre el fichero de ?ndices en caso de que exista.
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69 | * @throws ReadDriverException TODO
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70 | * @throws OpenDriverException
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71 | * @throws InitializeDriverException
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72 | */
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73 | void start() throws ReadDriverException, InitializeDriverException; |
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74 | |||
75 | /**
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76 | * Hace que se cierre el soporte f?sico de la capa. Cierra el fichero de
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77 | * ?ndices en caso de que exista.
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78 | * @throws ReadDriverException TODO
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79 | */
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80 | void stop() throws ReadDriverException; |
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81 | |||
82 | /**
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83 | * Devuelve la geometr?a a partir de un ?ndice.
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84 | *
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85 | * @param index ?ndice.
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86 | *
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87 | * @return Geometr?a.
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88 | * @throws ReadDriverException TODO
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89 | * @throws ExpansionFileReadException
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90 | */
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91 | IGeometry getShape(int index) throws ReadDriverException, ExpansionFileReadException; |
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92 | |||
93 | /**
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94 | * Devuelve el n?mero de Shape.
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95 | *
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96 | * @return N?mero de Shape.
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97 | * @throws ReadDriverException TODO
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98 | */
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99 | int getShapeCount() throws ReadDriverException; |
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100 | |||
101 | /**
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102 | * Devuelve la extensi?n total de la capa.
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103 | *
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104 | * @return Extensi?n total.
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105 | * @throws ReadDriverException TODO
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106 | * @throws ExpansionFileReadException
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107 | */
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108 | Rectangle2D getFullExtent() throws ReadDriverException, ExpansionFileReadException; |
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109 | |||
110 | /**
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111 | * Obtiene el tipo de las geometr?as almacenadas en esta fuente de datos
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112 | *
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113 | * @return Obtiene el tipo de la capa. Es un bit-oring de los tipos
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114 | * definidos en FShape POINT, LINE, POLYGON o TEXT;
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115 | * @throws ReadDriverException TODO
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116 | */
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117 | int getShapeType() throws ReadDriverException; |
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118 | /**
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119 | * Obtiene una referencia al objeto que implementa la interfaz vectorial
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120 | * con el fin de que las Strategy puedan optimizar en funci?n del driver.
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121 | *
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122 | * @return VectorialDriver
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123 | */
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124 | public VectorialDriver getDriver();
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125 | /**
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126 | * Establece el driver sobre el que act?a el adaptador
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127 | *
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128 | * @param driver
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129 | */
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130 | public void setDriver(VectorialDriver driver); |
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131 | /*
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132 | * (non-Javadoc)
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133 | *
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134 | * @see com.iver.cit.gvsig.fmap.layers.VectorialAdapter#getRecordset()
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135 | */
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136 | public SelectableDataSource getRecordset() throws ReadDriverException; |
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137 | public DriverAttributes getDriverAttributes();
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138 | |||
139 | /**
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140 | * En la implementaci?n por defecto podemos hacer que cada
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141 | * feature tenga ID = numero de registro.
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142 | * En el DBAdapter podr?amos "overrride" este m?todo y poner
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143 | * como ID de la Feature el campo ?nico escogido en
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144 | * la base de datos. B?sicamente es por comodidad.
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145 | * @param numReg
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146 | * @return
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147 | * @throws ReadDriverException TODO
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148 | * @throws ExpansionFileReadException
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149 | */
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150 | public IFeature getFeature(int numReg) throws ReadDriverException, ExpansionFileReadException; |
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151 | |||
152 | /* public IFeatureIterator getFeatureIterator(String strEPSG) throws DriverException;
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153 | public IFeatureIterator getFeatureIterator(Rectangle2D r, String strEPSG) throws DriverException; */
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154 | |||
155 | //void setRecordset(SelectableDataSource sds);
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156 | |||
157 | |||
158 | |||
159 | /**
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160 | * Returns an iterator over all the features of the vectorial data source.
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161 | * It applies a relational algebra "projection" operator (selects the specified fields).
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162 | *
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163 | * It the param newProjection is not null, it reprojects all the returned features
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164 | * to this projection
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165 | *
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166 | * @param fields fields we are intested in of the data source
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167 | * @return feature iterator whose features has as attributes the specified fields
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168 | */
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169 | public IFeatureIterator getFeatureIterator(String[] fields, IProjection newProjection) |
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170 | throws ReadDriverException;
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171 | |||
172 | /**
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173 | * Return a feature iterator from a given sql statement.
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174 | * <br>
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175 | * In this case, the statement will have the "projection" operator
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176 | * (select campo1, campo2, ...etc) and the "selection" operator (where ....)
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177 | *
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178 | * @param sql statement which define a filter. SQL sintax is very extrict, and must
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179 | * be suported by GDBMS
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180 | *
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181 | * @param newProjection new projection for the returned features (if not null)
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182 | * @return feature iterator
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183 | * */
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184 | public IFeatureIterator getFeatureIterator(String sql, IProjection newProjection) throws ReadDriverException; |
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185 | |||
186 | |||
187 | /**
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188 | * Makes an spatial query returning a feature iterator over the features which intersects
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189 | * or are contained in the rectangle query. Applies a restriction to the alphanumeric fields
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190 | * returned by the iterator, and a reprojection.
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191 | * <br>
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192 | * Details:
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193 | * <ul>
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194 | * <li>
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195 | * If newProjection is null, rect Rectangle2D is consideered in the same projection that the source data.
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196 | * </li>
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197 | * <li>
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198 | * If newProjection is not null, Rectangle2D is consideered in this projection (newProjection).
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199 | * So the source driver must reproject this rectangle before to make the query, and after that
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200 | * reproject all the returned features' geometry
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201 | * </li>
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202 | *
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203 | * </ul>
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204 | * @param rect
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205 | * @param fields
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206 | * @return
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207 | */
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208 | public IFeatureIterator getFeatureIterator(Rectangle2D rect, String[] fields, |
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209 | IProjection newProjection, boolean fastResult) throws ReadDriverException; |
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210 | |||
211 | |||
212 | public IFeatureIterator getFeatureIterator() throws ReadDriverException; |
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213 | /**
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214 | * Return the spatial index of the adapter.
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215 | * Responsability of create spatial index instances is of the FLyrVect class, but
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216 | * adapters need these index to build spatial query iterators.
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217 | * */
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218 | public ISpatialIndex getSpatialIndex();
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219 | |||
220 | /**
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221 | * Sets spatial index of the data source behind the adapter
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222 | *
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223 | * @param spatialIndex
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224 | */
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225 | public void setSpatialIndex(ISpatialIndex spatialIndex); |
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226 | |||
227 | /**
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228 | * Sets the projection of the data readed by the associated driver
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229 | * @param projection
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230 | */
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231 | public void setProjection(IProjection projection); |
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232 | |||
233 | public IProjection getProjection();
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234 | } |