Application: gvSIG desktop

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

 *

 * Copyright (C) 2004 IVER T.I. 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

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

package com.iver.cit.gvsig.fmap.layers;

import java.io.IOException;

import org.apache.log4j.Logger;

import org.xml.sax.SAXException;

import com.hardcode.driverManager.Driver;

import com.hardcode.driverManager.DriverLoadException;

import com.hardcode.gdbms.driver.exceptions.ReadDriverException;

import com.hardcode.gdbms.driver.exceptions.ReloadDriverException;

import com.hardcode.gdbms.driver.exceptions.WriteDriverException;

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

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

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

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

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

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

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

import com.hardcode.gdbms.engine.data.persistence.Memento;

import com.hardcode.gdbms.engine.data.persistence.MementoContentHandler;

import com.hardcode.gdbms.engine.data.persistence.MementoException;

import com.hardcode.gdbms.engine.instruction.EvaluationException;

import com.hardcode.gdbms.engine.instruction.FieldNotFoundException;

import com.hardcode.gdbms.engine.instruction.SemanticException;

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

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

import com.hardcode.gdbms.parser.ParseException;

import com.iver.cit.gvsig.fmap.drivers.FieldDescription;

import com.iver.cit.gvsig.fmap.layers.layerOperations.Selectable;

import com.iver.utiles.NumberUtilities;

import com.iver.utiles.XMLEntity;

/**

 * DataSource seleccionable.

 *

 * @author Fernando Gonz?lez Cort?s

 */

public class SelectableDataSource implements DataSource,Selectable {

        private static Logger logger = Logger.getLogger(SelectableDataSource.class.getName());

        private SelectionSupport selectionSupport = new SelectionSupport();

        private DataSource dataSource;

        private int[] mapping = null;

        /**

         * Crea un nuevo SelectableDataSource.

         *

         * @param name

         * @param ds

         * @throws ReadDriverException TODO

         */

        public SelectableDataSource(DataSource ds) throws ReadDriverException {

                dataSource = ds;

                dataSource.start();

                // Creamos el mapping de campos externos que no muestran el PK.

                mapExternalFields();

        }

        /**

         * Maps real fields or "external" fields. We don't want to see virtual fields.

         * @throws ReadDriverException

         */

        public void mapExternalFields() throws ReadDriverException {

                int numExternalFields = 0;

                this.dataSource.start();

                for (int i=0; i < dataSource.getFieldCount(); i++)

                {

                        if (!dataSource.isVirtualField(i))

                                numExternalFields++;

                }

                mapping = new int[numExternalFields];

                int j=0;

                for (int i=0; i < dataSource.getFieldCount(); i++)

                {

                        if (!dataSource.isVirtualField(i))

                                mapping[j++] = i;

                }

                this.dataSource.stop();

        }

        public static SelectableDataSource createSelectableDataSource(XMLEntity xml) throws DriverLoadException, XMLException{

                SelectionSupport ss = new SelectionSupport();

                ss.setXMLEntity(xml.getChild(0));

                XMLEntity xmlDS = xml.getChild(1);

                GDBMSParser parser = new GDBMSParser(xmlDS);

                MementoContentHandler gdbmsHandler = new MementoContentHandler();

                parser.setContentHandler(gdbmsHandler);

                try {

                        parser.parse();

                } catch (SAXException e) {

                        throw new XMLException(e);

                }

                SelectableDataSource sds;

        try {

            sds = new SelectableDataSource(gdbmsHandler.getDataSource(LayerFactory.getDataSourceFactory(), DataSourceFactory.AUTOMATIC_OPENING));

        } catch (EvaluationException e1) {

            throw new XMLException(e1);

        } catch (ReadDriverException e) {

                 throw new XMLException(e);

                } catch (DriverLoadException e) {

                         throw new XMLException(e);

                } catch (SemanticException e) {

                         throw new XMLException(e);

                } catch (ParseException e) {

                         throw new XMLException(e);

                } catch (NoSuchTableException e) {

                         throw new XMLException(e);

                }

        sds.selectionSupport=ss;

                return sds;

        }

        public void setDataSourceFactory(DataSourceFactory dsf) {

                dataSource.setDataSourceFactory(dsf);

        }

        public void setSourceInfo(SourceInfo sourceInfo) {

                dataSource.setSourceInfo(sourceInfo);

        }

        /**

         * A?ade el soporte para la selecci?n.

         *

         * @param selectionSupport

         */

        public void setSelectionSupport(SelectionSupport selectionSupport) {

                this.selectionSupport = selectionSupport;

        }

        /**

         * Devuelve el n?mero de campos.

         *

         * @return N?mero de campos.

         *

         * @throws DriverException

         */

        public int getFieldCount() throws ReadDriverException {

                // return dataSource.getFieldCount()-numVirtual;

//                if (mapping.length != dataSource.getFieldCount())

//                {

//                        mapExternalFields();

//                        RuntimeException e = new RuntimeException("Recalculamos los campos de recordset!!");

//                        e.printStackTrace();

//                }

                return mapping.length;

        }

        /**

         * Return index field searching by its name

         *

         * @param arg0 field name.

         *

         * @return field index. -1 if not found

         *

         * @throws DriverException

         * @throws FieldNotFoundException

         */

        public int getFieldIndexByName(String arg0)

                throws ReadDriverException {

                int internal = dataSource.getFieldIndexByName(arg0);

                for (int i=0; i < mapping.length; i++)

                {

                        if (mapping[i] == internal)

                                return i;

                }

                //OJO Parche para rodear poblema de gdbms + FileDriver

                // Cuando en le fichero existe un campo de nombre 'PK'

                if (arg0.equalsIgnoreCase("pk")){

                        for (int i=0; i < mapping.length; i++)

                        {

                                if (dataSource.getFieldName(mapping[i]).equalsIgnoreCase(arg0)){

                                        return i;

                                }

                        }

                }

                return -1;

        }

        /**

         * Devuelve el nombre del campo a partir del ?ndice.

         *

         * @param arg0 ?ndice.

         *

         * @return nombre del campo.

         *

         * @throws DriverException

         */

        public String getFieldName(int arg0) throws ReadDriverException {

            // return dataSource.getFieldName(arg0);

                return dataSource.getFieldName(mapping[arg0]);

        }

        /**

         * Devuelve el valor a partir del n?mro de fila y columna.

         *

         * @param arg0 n?mero de registro.

         * @param arg1 n?mero de campo.

         *

         * @return Valor.

         *

         * @throws DriverException

         */

        public Value getFieldValue(long arg0, int arg1) throws ReadDriverException {

                return dataSource.getFieldValue(arg0, mapping[arg1]);

                // return dataSource.getFieldValue(arg0, arg1);

        }

        /**

         * Devuelve el nombre del DataSource.

         *

         * @return Nombre.

         */

        public String getName() {

                return dataSource.getName();

        }

        /**

         * Devuelve el n?mero de filas en total.

         *

         * @return n?mero de filas.

         *

         * @throws DriverException

         */

        public long getRowCount() throws ReadDriverException {

                return dataSource.getRowCount();

        }

        /**

         * Inicializa el dataSource.

         *

         * @throws DriverException

         */

        public void start() throws ReadDriverException {

                // logger.debug("dataSource.start()");

                dataSource.start();

        }

        /**

         * Finaliza el DataSource.

         *

         * @throws DriverException

         */

        public void stop() throws ReadDriverException {

                // logger.debug("dataSource.stop()");

                dataSource.stop();

        }

        /**

         * A partir del XMLEntity se rellenan los atributos del DataSource.

         *

         * @param child

         */

        public void setXMLEntity03(XMLEntity child) {

                selectionSupport.setXMLEntity(child.getChild(0));

        }

        /**

         * Cuando ocurre un evento de cambio en la selecci?n, ?ste puede ser uno de

         * una gran cantidad de eventos. Con el fin de no propagar todos estos

         * eventos, se realiza la propagaci?n de manera manual al final de la

         * "r?faga" de eventos

         */

        public void fireSelectionEvents() {

                selectionSupport.fireSelectionEvents();

        }

        /**

         * A?ade un nuevo Listener al SelectionSupport.

         *

         * @param listener SelectionListener.

         */

        public void addSelectionListener(SelectionListener listener) {

                selectionSupport.addSelectionListener(listener);

        }

        /**

         * Borra un Listener al SelectionSupport.

         *

         * @param listener Listener a borrar.

         */

        public void removeSelectionListener(SelectionListener listener) {

                selectionSupport.removeSelectionListener(listener);

        }

        /**

         * Borra la selecci?n.

         */

        public void clearSelection() {

                selectionSupport.clearSelection();

        }

        /**

         * Develve un FBitSet con los ?ndices de los elementos seleccionados.

         *

         * @return FBitset con los elementos seleccionados.

         */

        public FBitSet getSelection() {

                return selectionSupport.getSelection();

        }

        /**

         * Devuelve el SelectionSupport.

         *

         * @return SelectinSuport.

         */

        public SelectionSupport getSelectionSupport() {

                return selectionSupport;

        }

        /**

         * Devuelve true si el elemento est? seleccionado.

         *

         * @param recordIndex ?ndice del registro.

         *

         * @return True si el registro est? seleccionado.

         */

        public boolean isSelected(int recordIndex) {

                return selectionSupport.isSelected(recordIndex);

        }

        /**

         * Inserta una nueva selecci?n.

         *

         * @param selection FBitSet.

         */

        public void setSelection(FBitSet selection) {

                selectionSupport.setSelection(selection);

        }

        private void putMemento(XMLEntity xml) throws XMLException {

                try {

                        GDBMSHandler handler = new GDBMSHandler();

                        Memento m = getMemento();

                        m.setContentHandler(handler);

                        m.getXML();

                        XMLEntity child = handler.getXMLEntity();

                        xml.addChild(child);

                } catch (MementoException e) {

                        throw new XMLException(e);

                } catch (SAXException e) {

                        throw new XMLException(e);

                }

        }

        /**

         * Devuelve el XMLEntity con la informaci?n necesaria para reproducir el

         * DataSource.

         *

         * @return XMLEntity.

         * @throws XMLException

         */

        public XMLEntity getXMLEntity() throws XMLException {

                XMLEntity xml = new XMLEntity();

                xml.putProperty("className",this.getClass().getName());

                xml.addChild(selectionSupport.getXMLEntity());

                putMemento(xml);

                return xml;

        }

        /**

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

         */

        public long[] getWhereFilter() throws IOException {

                return dataSource.getWhereFilter();

        }

        /*

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

         */

        public int getFieldType(int i) throws ReadDriverException {

                // return dataSource.getFieldType(i);

                if (i>mapping.length-1)

                        return dataSource.getFieldType(i);

                return dataSource.getFieldType(mapping[i]);

        }

        /*

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

         */

        public DataSourceFactory getDataSourceFactory() {

                return dataSource.getDataSourceFactory();

        }

        /*

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

         */

        public String getAsString() throws ReadDriverException {

                return dataSource.getAsString();

        }

        /*

         * @throws DriverException

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

         */

        public void remove() throws WriteDriverException {

                dataSource.remove();

        }

        /*

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

         */

        public Memento getMemento() throws MementoException {

                return dataSource.getMemento();

        }

        /*

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

         */

        public SourceInfo getSourceInfo() {

                return dataSource.getSourceInfo();

        }

    /*

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

     */

    public int[] getPrimaryKeys() throws ReadDriverException {

            return dataSource.getPrimaryKeys();

    }

    /*

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

     */

    public ValueCollection getPKValue(long rowIndex) throws ReadDriverException {

        return dataSource.getPKValue(rowIndex);

    }

    /*

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

     */

    public String getPKName(int fieldId) throws ReadDriverException {

        return dataSource.getPKName(fieldId);

    }

    /*

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

     */

    public int getPKType(int i) throws ReadDriverException {

        return dataSource.getPKType(i);

    }

    /*

     * @throws DriverException

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

     */

    public int getPKCardinality() throws ReadDriverException {

        return dataSource.getPKCardinality();

    }

    /*

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

     */

    public Value[] getRow(long rowIndex) throws ReadDriverException {

            Value[] withoutVirtuals = new Value[mapping.length];

            Value[] internal = dataSource.getRow(rowIndex);

            for (int i=0; i < mapping.length; i++)

            {

                    withoutVirtuals[i] = internal[mapping[i]];

            }

        return withoutVirtuals;

    }

    /*

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

     */

    public String[] getFieldNames() throws ReadDriverException {

            String[] fieldNames = new String[dataSource.getFieldCount()];

                int j=0;

                for (int i=0; i < dataSource.getFieldCount(); i++)

                {

                        if (!dataSource.isVirtualField(i))

                                fieldNames[j++] = dataSource.getFieldName(i);

                }

        // return dataSource.getFieldNames();

            return fieldNames;

    }

    /*

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

     */

    public String[] getPKNames() throws ReadDriverException {

        return dataSource.getPKNames();

    }

        public void removeLinksSelectionListener() {

                selectionSupport.removeLinkSelectionListener();

        }

    /*

     * @throws DriverException

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

     */

    public DataWare getDataWare(int arg0) throws ReadDriverException {

        return dataSource.getDataWare(arg0);

    }

        public int getFieldWidth(int i) throws ReadDriverException {

                return dataSource.getFieldWidth(mapping[i]);

                // return dataSource.getFieldWidth(i);

        }

        public boolean isVirtualField(int fieldId) throws ReadDriverException {

                return dataSource.isVirtualField(fieldId);

        }

        /**

         * Useful to writers, to know the field definitions.

         * NOTE: Maximun precision: 6 decimals. (We may need to change this)

         * @return Description of non virtual fields

         * @throws DriverException

         */

        public FieldDescription[] getFieldsDescription() throws ReadDriverException{

                int numFields = getFieldCount();

                FieldDescription[] fieldsDescrip = new FieldDescription[numFields];

                for (int i = 0; i < numFields; i++) {

                        fieldsDescrip[i] = new FieldDescription();

                        int type = getFieldType(i);

                        fieldsDescrip[i].setFieldType(type);

                        fieldsDescrip[i].setFieldName(getFieldName(i));

                        fieldsDescrip[i].setFieldLength(getFieldWidth(i));

                        if (NumberUtilities.isNumeric(type))

                        {

                                if (!NumberUtilities.isNumericInteger(type))

                                        // TODO: If there is a lost in precision, this should be changed.

                                        fieldsDescrip[i].setFieldDecimalCount(6);

                        }

                        else

                                fieldsDescrip[i].setFieldDecimalCount(0);

                        // TODO: ?DEFAULTVALUE?

                        // fieldsDescrip[i].setDefaultValue(get)

                }

                return fieldsDescrip;

        }

        public Driver getDriver() {

                return this.dataSource.getDriver();

        }

        public void reload() throws ReloadDriverException {

                dataSource.reload();

                try {

                        mapExternalFields();

                } catch (ReadDriverException e) {

                        throw new ReloadDriverException(getDriver().getName(),e);

                }

        }

        public void addDataSourceListener(IDataSourceListener listener) {

                dataSource.addDataSourceListener(listener);

        }

        public void removeDataSourceListener(IDataSourceListener listener) {

                dataSource.removeDataSourceListener(listener);

        }

}