Application: gvSIG desktop

/*

 * Cresques Mapping Suite. Graphic Library for constructing mapping applications.

 *

 * Copyright (C) 2004-5.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 * cresques@gmail.com

 */

package org.cresques.io;

import java.io.IOException;

import java.lang.reflect.Constructor;

import java.lang.reflect.InvocationTargetException;

import java.util.Iterator;

import java.util.Map;

import java.util.Set;

import java.util.TreeMap;

import org.cresques.geo.ViewPortData;

import org.cresques.px.PxRaster;

/**

 * Clase abstracta de la que heredan los drivers de escritura. Tiene los

 * m?todos abstractos que debe implementar cualquier driver de escritura

 * y las funcionalidades y opciones soportadas comunes a todos ellos.

 * @author Nacho Brodin (brodin_ign@gva.es)

 */

public abstract class GeoRasterWriter {

    private static TreeMap                 supportedExtensions = null;

    protected static TreeMap         typeList = new TreeMap();

    protected String                         outFileName = null;

    protected String                         inFileName = null;

    protected int                                 sizeWindowX = 0;

    protected int                                 sizeWindowY = 0;

    protected int                                 ulX = 0;

    protected int                                 ulY = 0;

    protected PxRaster                         currentRaster;

    protected IDataWriter                 dataWriter = null;

    protected int                                 nBands = 0;

    protected String                         ident = null;

    protected String                         driver = null;

    /**

     * Registra un formato de escritura

     * @param ext        Extensi?n del fichero registrado

     * @param clase        Clase que maneja el formato registrado

     */

    public static void registerWriterExtension(String ext, Class clase) {

        if (supportedExtensions == null) {

            supportedExtensions = new TreeMap();

        }

        ext = ext.toLowerCase();

        System.out.println("Write RASTER: extension '" + ext + "' supported.");

        supportedExtensions.put(ext, clase);

    }

    /**

     * Obtiene la lista de extensiones registradas

     * @return Lista de extensiones registradas o null si no hay ninguna

     */

    public static String[] getDriversExtensions(){

            if (supportedExtensions.size() == 0)

                    return null;

            String[] list = new String[supportedExtensions.size()];

            Set values = supportedExtensions.entrySet();

            int i = 0;

            for (Iterator it=values.iterator(); it.hasNext(); ) {

            list[i] = (String)((Map.Entry)it.next()).getKey();

            i++;

        }

            return list;

    }

    /**

     * Obtiene la lista de tipos de driver

     * @return Lista de tipos de driver registradas o null si no hay ninguno

     */

    public static String[] getDriversType(){

            if (typeList.size() == 0)

                    return null;

            String[] list = new String[typeList.size()];

            Set values = typeList.entrySet();

            int i = 0;

            for (Iterator it=values.iterator(); it.hasNext(); ) {

            list[i] = (String)((Map.Entry)it.next()).getValue();

            i++;

        }

            return list;

    }

    /**

     * Obtiene el tipo de driver a partir de la extensi?n

     * @param ext        Extensi?n

     * @return        Tipo

     */

    public static String getDriverType(String ext){

            return (String)typeList.get(ext);

    }

    /**

     * Devuelve el n?mero de drivers soportados

     * @return N?mero de drivers soportados

     */

    public static int getNDrivers() {

        return supportedExtensions.size();

    }

    /**

     * Devuelve el n?mero de tipos de driver registrados

     * @return N?mero de tipos de driver soportados

     */

    public static int getNTypes() {

        return typeList.size();

    }

    /**

     * Devuelve el identificador del driver

     * @return        Identificador del driver

     */

    public String getIdent() {

        return ident;

    }

    /**

     * Obtiene el nombre del driver.

     * @return        Nombre del driver

     */

    public String getDriverName() {

        return driver;

    }

    /**

     * 

     * @return

     */

    public String getDriverType() {

        return driver;

    }

    /**

         * Factoria para obtener escritores de los distintos tipos de raster.

         * 

         * @param fName Nombre del fichero.

         * @return GeoRasterWriter, o null si hay problemas.

         */

        public static GeoRasterWriter getWriter(String fName) {

                String ext = fName.toLowerCase().substring(fName.lastIndexOf('.')+1);

                GeoRasterWriter grw = null;

                if (!supportedExtensions.containsKey(ext)) 

                        return grw;

                Class clase = (Class) supportedExtensions.get(ext);

                Class [] args = {String.class};

                try {

                        Constructor hazNuevo = clase.getConstructor(args);

                        Object [] args2 = {fName};

                        grw = (GeoRasterWriter) hazNuevo.newInstance(args2);

                } catch (SecurityException e) {

                        e.printStackTrace();

                } catch (NoSuchMethodException e) {

                        e.printStackTrace();

                } catch (IllegalArgumentException e) {

                        e.printStackTrace();

                } catch (InstantiationException e) {

                        e.printStackTrace();

                } catch (IllegalAccessException e) {

                        e.printStackTrace();

                } catch (InvocationTargetException e) {

                        e.printStackTrace();

                }

                return grw;

        }

        /**

         * Factoria para obtener escritores de los distintos tipos de raster.

         * 

         * @param fName Nombre del fichero.

         * @return GeoRasterWriter, o null si hay problemas.

         */

        public static GeoRasterWriter getWriter(IDataWriter dataWriter, 

                                                                                     String outFileName, 

                                                                                     int blockSize, 

                                                                                     int nBands,

                                                                                     ViewPortData vp,

                                                                                     int compresion,

                                                                                     int outSizeX,

                                                                                     int outSizeY) {

                String ext = outFileName.toLowerCase().substring(outFileName.lastIndexOf('.')+1);

                GeoRasterWriter grw = null;

                if (!supportedExtensions.containsKey(ext)) 

                        return grw;

                Class clase = (Class) supportedExtensions.get(ext);

                Class [] args = {IDataWriter.class, String.class, Integer.class, Integer.class, 

                                                 ViewPortData.class, Integer.class, Integer.class, Integer.class};

                try {

                        Constructor hazNuevo = clase.getConstructor(args);

                        Object [] args2 = {dataWriter, outFileName, new Integer(blockSize), new Integer(nBands), 

                                                                vp, new Integer(compresion), new Integer(outSizeX), new Integer(outSizeY)};

                        grw = (GeoRasterWriter) hazNuevo.newInstance(args2);

                } catch (SecurityException e) {

                        e.printStackTrace();

                } catch (NoSuchMethodException e) {

                        e.printStackTrace();

                } catch (IllegalArgumentException e) {

                        e.printStackTrace();

                } catch (InstantiationException e) {

                        e.printStackTrace();

                } catch (IllegalAccessException e) {

                        e.printStackTrace();

                } catch (InvocationTargetException e) {

                        e.printStackTrace();

                }

                return grw;

        }

    /**

     * Asigna propiedades al driver a partir de un vector de

     * strings donde cada elemento tiene la estructura de

     * propiedad=valor.

     * @param props        Propiedades

     */

    public abstract void setProps(String[] props);

    /**

     * Realiza la funci?n de compresi?n a partir de un GeoRasterFile.

     * @throws IOException

     */

    public abstract void fileWrite() throws IOException;

    /**

     * Realiza la funci?n de compresi?n a partir de los datos pasados por el cliente.

     * @throws IOException

     */

    public abstract void dataWrite() throws IOException;

    /**

     * Cierra el driver

     */

    public abstract void writeClose();

    /**

     * Cancela el grabado de datos

     */

    public abstract void writeCancel();

    /**

     * Devuelve la configuraci?n de la ventana de dialogo

     * para las propiedades del driver de escritura que se est? tratando.

     * @return Texto XML con las propiedades

     */

    public abstract String getXMLPropertiesDialog();

}