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;

import java.io.IOException;

import com.hardcode.driverManager.DriverLoadException;

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

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

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

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

import com.hardcode.gdbms.parser.ParseException;

import com.iver.andami.PluginServices;

import com.iver.andami.messages.NotificationManager;

import com.iver.andami.plugins.Extension;

import com.iver.andami.ui.mdiManager.View;

import com.iver.cit.gvsig.fmap.DriverException;

import com.iver.cit.gvsig.fmap.layers.FBitSet;

import com.iver.cit.gvsig.fmap.layers.FLayer;

import com.iver.cit.gvsig.fmap.layers.LayerFactory;

import com.iver.cit.gvsig.fmap.layers.SelectableDataSource;

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

import com.iver.cit.gvsig.gui.Table;

import com.iver.cit.gvsig.gui.filter.DefaultExpressionDataSource;

import com.iver.cit.gvsig.gui.filter.ExpressionListener;

import com.iver.cit.gvsig.gui.filter.FilterDialog;

import com.iver.cit.gvsig.project.ProjectView;

import com.iver.utiles.exceptionHandling.ExceptionListener;

/** 

 * Extensi?n que abre un di?logo para poder hacer un filtro de una capa o tabla.

 *

 * @author Vicente Caballero Navarro

 */

public class FiltroExtension extends Extension implements ExpressionListener {

        protected SelectableDataSource dataSource = null;

        protected Table vista;

        /**

         * DOCUMENT ME!

         */

        public void initialize() {

        }

        /**

         * DOCUMENT ME!

         *

         * @param actionCommand DOCUMENT ME!

         */

        public void execute(String actionCommand) {

                if ("FILTRO".equals(actionCommand)) {

                        try {

                                View v = PluginServices.getMDIManager().getActiveView();

                                if (v instanceof Table) {

                                        vista = (Table) v;

                                        dataSource = (SelectableDataSource)vista.getModel().getModelo().getRecordset();

                                } else if (v instanceof com.iver.cit.gvsig.gui.View) {

                                        ProjectView pv = ((com.iver.cit.gvsig.gui.View) v).getModel();

                                        FLayer layer = pv.getMapContext()

                                        .getLayers().getActives()[0];

                                        dataSource = pv.getProject().getDataSourceByLayer(layer);

                                }

                        }  catch (DriverException e) {

                                NotificationManager.addError("Error filtrando", e);

                        } 

                        doExecute();

                }

        }

        /**

         * "execute" method action. 

         *

         */

        protected void doExecute(){

                try{

                        DefaultExpressionDataSource ds = new DefaultExpressionDataSource();

                        ds.setTable(dataSource);

                        FilterDialog dlg = new FilterDialog();

                        dlg.addExpressionListener(this);

                        dlg.addExceptionListener(new ExceptionListener() {

                                public void exceptionThrown(Throwable t) {

                                        NotificationManager.addError(t.getMessage(), t);

                                }

                        });

                        dlg.setModel(ds);

                        PluginServices.getMDIManager().addView(dlg);

                } catch (DriverLoadException e) {

                        // TODO Auto-generated catch block

                        e.printStackTrace();

                }

        }

        /**

         * DOCUMENT ME!

         *

         * @return DOCUMENT ME!

         */

        public boolean isEnabled() {

                return true;

        }

        /**

         * DOCUMENT ME!

         *

         * @return DOCUMENT ME!

         */

        public boolean isVisible() {

                View v = PluginServices.getMDIManager().getActiveView();

                if (v == null) {

                        return false;

                }

                if (v.getClass() == Table.class) {

                        return true;

                } else {

                        if (v instanceof com.iver.cit.gvsig.gui.View) {

                                com.iver.cit.gvsig.gui.View view = (com.iver.cit.gvsig.gui.View) v;

                                ProjectView pv = view.getModel();

                                FLayer[] seleccionadas = pv.getMapContext().getLayers()

                                .getActives();

                                if (seleccionadas.length == 1) {

                                        if (seleccionadas[0] instanceof AlphanumericData) {

                                                return true;

                                        }

                                }

                        }

                        return false;

                }

        }

        /**

         * DOCUMENT ME!

         *

         * @param expression DOCUMENT ME!

         */

        public void newSet(String expression) {

                long[] sel = doSet(expression);

                if (sel == null) {

                        throw new RuntimeException("Not a 'where' clause?");

                }

                FBitSet selection = new FBitSet();

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

                        selection.set((int) sel[i]);

                }

                dataSource.clearSelection();

                dataSource.setSelection(selection);

        }

        /**

         * @see com.iver.cit.gvsig.gui.filter.ExpressionListener#newSet(java.lang.String)

         */

        private long[] doSet(String expression) {

                try {

                        DataSource ds = LayerFactory.getDataSourceFactory().executeSQL(expression,

                                        DataSourceFactory.MANUAL_OPENING);

                        return ds.getWhereFilter();

                } catch (DriverLoadException e) {

                        NotificationManager.addError("Error cargando el driver", e);

                } catch (com.hardcode.gdbms.engine.data.driver.DriverException e) {

                        NotificationManager.addError("Error accediendo al driver", e);

                } catch (ParseException e) {

                        NotificationManager.addError("Parse error", e);

                } catch (SemanticException e) {

                        NotificationManager.addError(e.getMessage(), e);

                } catch (IOException e) {

                        NotificationManager.addError("GDBMS internal error", e);

                } catch (EvaluationException e) {

                        NotificationManager.addError("Sintaxis incorrecta", e);

                }

                return null;

        }

        /**

         * DOCUMENT ME!

         *

         * @param expression DOCUMENT ME!

         */

        public void addToSet(String expression) {

                long[] sel = doSet(expression);

                if (sel == null) {

                        throw new RuntimeException("Not a 'where' clause?");

                }

                FBitSet selection = new FBitSet();

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

                        selection.set((int) sel[i]);

                }

                FBitSet fbs = dataSource.getSelection();

                fbs.or(selection);

                dataSource.setSelection(fbs);

        }

        /**

         * DOCUMENT ME!

         *

         * @param expression DOCUMENT ME!

         */

        public void fromSet(String expression) {

                long[] sel = doSet(expression);

                if (sel == null) {

                        throw new RuntimeException("Not a 'where' clause?");

                }

                FBitSet selection = new FBitSet();

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

                        selection.set((int) sel[i]);

                }

                FBitSet fbs = dataSource.getSelection();

                fbs.and(selection);

                dataSource.setSelection(fbs);

        }

}