gvsig-raster / org.gvsig.raster.gdal / tags / pre-remove-jgdal / org.gvsig.raster.gdal / org.gvsig.raster.gdal.io / src / main / java / org / gvsig / jgdal / GdalDriver.java @ 3739
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1 | 2453 | nbrodin | /* gvSIG. Geographic Information System of the Valencian Government
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2 | *
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3 | * Copyright (C) 2007-2008 Infrastructures and Transports Department
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4 | * of the Valencian Government (CIT)
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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 2
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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 | */
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22 | package org.gvsig.jgdal; |
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23 | |||
24 | import java.io.File; |
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25 | 3739 | jbadia | import java.nio.charset.Charset; |
26 | 2453 | nbrodin | import java.util.StringTokenizer; |
27 | 3739 | jbadia | import java.util.Vector; |
28 | 3499 | jbadia | |
29 | import org.gdal.gdal.Dataset; |
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30 | import org.gdal.gdal.Driver; |
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31 | import org.gdal.gdal.gdal; |
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32 | 2453 | nbrodin | /**
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33 | * Representa un driver de un tipo de im?gen
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34 | *
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35 | * @author Nacho Brodin (nachobrodin@gmail.com).<BR> Equipo de desarrollo gvSIG.<BR> http://www.gvsig.gva.es
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36 | * @version 0.0
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37 | * @link http://www.gvsig.gva.es
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38 | */
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39 | 3499 | jbadia | public class GdalDriver extends Driver { |
40 | // private native long createCopyNat(long cPtr, String file, long src, int bstrict);
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41 | // private native long createCopyParamsNat(long cPtr, String file, long src, int bstrict, Options opc);
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42 | // private native long createNat(long cPtr, String filename, int nXSize, int nYSize, int nBands, int nType, Options opc);
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43 | 2453 | nbrodin | |
44 | /**
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45 | * Constructor de Driver pasandole como par?metro la referencia al objeto
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46 | * GdalDriver en C
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47 | *
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48 | * @param cPtr direcci?n de memoria del objeto
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49 | */
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50 | public GdalDriver(long cPtr) { |
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51 | 3499 | jbadia | super(cPtr, true); |
52 | 2453 | nbrodin | } |
53 | |||
54 | 3739 | jbadia | public GdalDriver(Driver ptrdrv) { |
55 | this(Driver.getCPtr(ptrdrv)); |
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56 | } |
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57 | |||
58 | 2453 | nbrodin | /**
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59 | * Crea una copia de una im?gen a partir de un dataset de origen especificado.
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60 | * @param file Nombre del fichero sobre el cual se guardar? la copia
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61 | * @param src Dataset fuente a copiar
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62 | * @param bstrict TRUE si la copia debe ser estrictamente equivalente y FALSE indica que la copia puede
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63 | * adaptarse a las necesidades del formato de salida
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64 | * @return Gdal Dataset de la im?gen de salida
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65 | * @throws GdalException
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66 | */
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67 | public Gdal createCopy(String file, Gdal src, boolean bstrict) throws GdalException { |
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68 | String path = file.substring(0, file.lastIndexOf(File.separator)); |
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69 | File f = new File(path); |
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70 | if (!f.canWrite())
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71 | throw new GdalException("Ruta de archivo incorrecta."); |
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72 | f = null;
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73 | |||
74 | if (src == null) |
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75 | throw new GdalException("El objeto Gdal es null"); |
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76 | |||
77 | 3499 | jbadia | // if (cPtr == 0)
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78 | // throw new GdalException("No se ha podido acceder al archivo.");
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79 | 2453 | nbrodin | |
80 | 3499 | jbadia | Dataset data = gdal.Open(file, bstrict ? 1 : 0); |
81 | Dataset copyDataset = CreateCopy(file, data, bstrict ? 1 : 0); |
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82 | 2453 | nbrodin | |
83 | // if (ptr == 0)
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84 | // throw new GdalException("No se ha podido crear la copia");
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85 | |||
86 | 3735 | jbadia | return new Gdal(copyDataset); |
87 | 2453 | nbrodin | } |
88 | |||
89 | |||
90 | /**
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91 | * A partir de las opciones en forma de vector de Strings pasadas por el usuario donde cada
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92 | * elemento del vector tiene la forma VARIABLE=VALOR crea el objeto Options para que sea accesible
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93 | * a las funciones JNI desde C.
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94 | * @param params Vector de strigs con las opciones
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95 | * @return Options Objeto de opciones
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96 | */
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97 | private Options selectOptions(String[] params) { |
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98 | if (params == null) |
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99 | return null; |
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100 | |||
101 | Options opc = new Options(params.length);
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102 | StringTokenizer st;
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103 | for (int i = 0; i < params.length; i++) { |
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104 | st = new StringTokenizer(params[i], "="); |
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105 | String var = st.nextToken();
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106 | String dato = st.nextToken();
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107 | opc.addOption(var, dato); |
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108 | } |
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109 | return opc;
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110 | } |
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111 | |||
112 | /**
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113 | * Crea una copia de una im?gen a partir de un dataset de origen especificado y unos par?metros dados.
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114 | * @param file Nombre del fichero sobre el cual se guardar? la copia
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115 | * @param src Dataset fuente a copiar
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116 | * @param bstrict TRUE si la copia debe ser estrictamente equivalente y FALSE indica que la copia puede
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117 | * adaptarse a las necesidades del formato de salida
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118 | * @param params Vector de strigs con las opciones de la copia
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119 | * @return Gdal Dataset de la im?gen de salida
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120 | * @throws GdalException
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121 | */
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122 | public Gdal createCopy(String file, Gdal src, boolean bstrict, String[] params) throws GdalException { |
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123 | String path = file.substring(0, file.lastIndexOf(File.separator)); |
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124 | File f = new File(path); |
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125 | if (!f.canWrite())
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126 | throw new GdalException("Ruta de archivo incorrecta."); |
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127 | f = null;
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128 | |||
129 | 3499 | jbadia | // if (cPtr == 0)
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130 | // throw new GdalException("No se ha podido acceder al archivo.");
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131 | 2453 | nbrodin | |
132 | 3499 | jbadia | // if (src == null)
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133 | // throw new GdalException("El objeto Gdal es null");
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134 | 2453 | nbrodin | |
135 | 3499 | jbadia | Dataset data = gdal.Open(file, bstrict ? 1 : 0); |
136 | Dataset copyDataset = CreateCopy(file, data, bstrict ? 1 : 0, params); |
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137 | 2453 | nbrodin | |
138 | 3499 | jbadia | if (copyDataset == null) |
139 | 2453 | nbrodin | throw new GdalException("No se ha podido crear la copia"); |
140 | |||
141 | 3735 | jbadia | return new Gdal(copyDataset); |
142 | 2453 | nbrodin | } |
143 | |||
144 | |||
145 | /**
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146 | * Crea un nuevo dataset con el driver actual
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147 | *
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148 | * @param filename Nombre del dataset a crear
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149 | * @param nXSize Ancho en pixels
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150 | * @param nYSize Alto en pixels
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151 | * @param nBands N?mero de bandas
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152 | * @param nType Tipo de raster
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153 | * @param params lista de par?metros especificos del driver
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154 | */
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155 | public Gdal create(String filename, int nXSize, int nYSize, int nBands, int nType, String[] params) throws GdalException { |
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156 | 3499 | jbadia | // if (cPtr == 0)
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157 | // throw new GdalException("No se ha podido acceder al archivo.");
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158 | 2453 | nbrodin | |
159 | 3739 | jbadia | Driver driver = (Driver) this; |
160 | byte ptext[] = filename.getBytes(Charset.forName("ISO_8859_1")); |
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161 | String value = new String(ptext, Charset.forName("UTF-8")); |
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162 | Dataset data = driver.Create(value, nXSize, nYSize, nBands, nType, StringArrayToVector(params)); |
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163 | 2453 | nbrodin | |
164 | 3735 | jbadia | return new Gdal(data); |
165 | 2453 | nbrodin | } |
166 | 3739 | jbadia | |
167 | private static Vector StringArrayToVector(String[] options) |
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168 | { |
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169 | if (options == null) |
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170 | return null; |
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171 | Vector v = new Vector(); |
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172 | for(int i=0;i<options.length;i++) |
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173 | v.addElement(options[i]); |
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174 | return v;
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175 | } |
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176 | |||
177 | 2453 | nbrodin | } |