| gvSIG desktop 1

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2006 Prodevelop and Generalitat Valenciana.

 *

 * 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:

 *

 *   Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *   +34 963862235

 *   gvsig@gva.es

 *   www.gvsig.gva.es

 *

 *    or

 *

 *   Prodevelop Integraci?n de Tecnolog?as SL

 *   Conde Salvatierra de ?lava , 34-10

 *   46004 Valencia

 *   Spain

 *

 *   +34 963 510 612

 *   +34 963 510 968

 *   gis@prodevelop.es

 *   http://www.prodevelop.es

 */

package es.prodevelop.cit.gvsig.fmap.drivers.jdbc.oracle;

import com.hardcode.driverManager.Driver;

import com.hardcode.driverManager.DriverLoadException;

import com.hardcode.gdbms.engine.data.SourceInfo;

import com.hardcode.gdbms.engine.data.driver.DriverException;

import com.hardcode.gdbms.engine.data.driver.FileDriver;

import com.hardcode.gdbms.engine.data.driver.GDBMSDriver;

import com.hardcode.gdbms.engine.data.driver.ReadAccess;

import com.hardcode.gdbms.engine.data.edition.DataWare;

import com.hardcode.gdbms.engine.data.file.AbstractFileDataSource;

import com.hardcode.gdbms.engine.data.file.FileDataSource;

import com.hardcode.gdbms.engine.data.file.FileDataSourceFactory;

import com.hardcode.gdbms.engine.data.file.FileDataWare;

import com.hardcode.gdbms.engine.data.file.FileSourceInfo;

import com.hardcode.gdbms.engine.values.Value;

import com.hardcode.gdbms.engine.values.ValueFactory;

import java.io.File;

import java.io.IOException;

import java.sql.Types;

/**

 * This class is a simple FileDataSource adapter used to create a data source

 * based on a DBF file which contains the oracle <--> epsg codes.

 *

 * @author jldominguez

 *

 */

class OFileDataSourceAdapter extends AbstractFileDataSource

    implements FileDataSource {

    private File file;

    private FileDriver driver;

    private int sem = 0;

    private int fieldCount = -1;

    /**

     * @see com.hardcode.gdbms.engine.data.DataSource#start()

     */

    public void start() throws DriverException {

        try {

            if (sem == 0) {

                driver.open(file);

            }

            sem++;

        }

        catch (IOException e) {

            throw new DriverException(e);

        }

    }

    /**

     * @see com.hardcode.gdbms.engine.data.DataSource#stop()

     */

    public void stop() throws DriverException {

        try {

            sem--;

            if (sem == 0) {

                driver.close();

            }

            else if (sem < 0) {

                throw new RuntimeException("DataSource closed too many times");

            }

        }

        catch (IOException e) {

            throw new DriverException(e);

        }

    }

    /**

     * Asigna el driver al adaptador

     *

     * @param driver

     *            The driver to set.

     */

    public void setDriver(FileDriver driver) {

        this.driver = driver;

    }

    /**

     * Sets the source information of the DataSource

     *

     * @param sourceInfo

     *            The file to set.

     */

    public void setSourceInfo(SourceInfo sourceInfo) {

        super.setSourceInfo(sourceInfo);

        file = new File(((FileSourceInfo) sourceInfo).file);

    }

    /**

     * @see com.hardcode.gdbms.engine.data.DataSource#getDriver()

     */

    public ReadAccess getReadDriver() {

        return driver;

    }

    /**

     * @see com.hardcode.gdbms.engine.data.DataSource#getName()

     */

    public String getName() {

        return sourceInfo.name;

    }

    /**

     * @see com.hardcode.gdbms.engine.data.DataSource#getPrimaryKeys()

     */

    public int[] getPrimaryKeys() throws DriverException {

        // The last field is the pk/row in FileDataSources

        return new int[] { getFieldCount() - 1 };

    }

    /**

     * @see com.hardcode.gdbms.engine.data.driver.ObjectDriver#getFieldCount()

     */

    public int getFieldCount() throws DriverException {

        if (fieldCount == -1) {

            fieldCount = getReadDriver().getFieldCount() + 1;

        }

        return fieldCount;

    }

    /**

     * @see com.hardcode.gdbms.engine.data.driver.ObjectDriver#getFieldName(int)

     */

    public String getFieldName(int fieldId) throws DriverException {

        // last field is the virtual primary key

        if (fieldId == (getFieldCount() - 1)) {

            return "PK";

        }

        return getReadDriver().getFieldName(fieldId);

    }

    /**

     * @see com.hardcode.gdbms.engine.data.driver.ObjectDriver#getFieldType(int)

     */

    public int getFieldType(int i) throws DriverException {

        // last field is the virtual primary key

        if (i == (getFieldCount() - 1)) {

            return Types.BIGINT;

        }

        return getReadDriver().getFieldType(i);

    }

    /**

     * @see com.hardcode.gdbms.engine.data.driver.ObjectDriver#getFieldValue(long,

     *      int)

     */

    public Value getFieldValue(long rowIndex, int fieldId)

        throws DriverException {

        // last field is the virtual primary key

        if (fieldId == (getFieldCount() - 1)) {

            return ValueFactory.createValue(rowIndex);

        }

        Value v = getReadDriver().getFieldValue(rowIndex, fieldId);

        return (v == null) ? ValueFactory.createNullValue() : v;

    }

    /**

     * @see com.hardcode.gdbms.engine.data.file.FileDataSource#getDriver()

     */

    public Driver getDriver() {

        return driver;

    }

    /**

     * @throws DriverException

     * @see com.hardcode.gdbms.engine.data.DataSource#getDataWare(int)

     */

    public DataWare getDataWare(int mode) throws DriverException {

        try {

            FileDataWare dw = FileDataSourceFactory.newDataWareInstance();

            FileDriver driver;

            driver = (FileDriver) getDataSourceFactory().getDriverManager()

                                      .getDriver(getDriver().getName());

            ((GDBMSDriver) driver).setDataSourceFactory(getDataSourceFactory());

            dw.setDriver(driver);

            dw.setDataSourceFactory(dsf);

            dw.setSourceInfo(getSourceInfo());

            return dw;

        }

        catch (DriverLoadException e) {

            throw new DriverException(e);

        }

    }

    public int getFieldWidth(int i) throws DriverException {

        return getReadDriver().getFieldWidth(i);

    }

    public boolean isVirtualField(int fieldId) throws DriverException {

        // last field is the virtual primary key

        if (fieldId == (this.getFieldCount() - 1)) {

            return true;

        }

        return false;

    }

    public void reload() throws DriverException {

        try {

            sem = 0;

            driver.close();

        }

        catch (IOException e) {

            throw new DriverException(e);

        }

        this.fieldCount = -1;

        this.start();

        this.raiseEventReloaded();

    }

}