| gvSIG desktop 1

/* 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.project.documents.table.gui;

import java.awt.BorderLayout;

import java.awt.Component;

import java.awt.Dimension;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.FocusEvent;

import java.awt.event.FocusListener;

import java.awt.event.ItemEvent;

import java.awt.event.ItemListener;

import java.awt.event.KeyEvent;

import java.awt.event.KeyListener;

import java.awt.geom.Rectangle2D;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Types;

import java.util.ArrayList;

import javax.swing.DefaultComboBoxModel;

import javax.swing.DefaultListModel;

import javax.swing.DefaultListSelectionModel;

import javax.swing.ImageIcon;

import javax.swing.JComboBox;

import javax.swing.JLabel;

import javax.swing.JList;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.JPasswordField;

import javax.swing.JScrollPane;

import javax.swing.JTextField;

import javax.swing.ListModel;

import javax.swing.ListSelectionModel;

import javax.swing.border.TitledBorder;

import javax.swing.event.ListSelectionEvent;

import org.apache.log4j.Logger;

import org.cresques.cts.IProjection;

import org.gvsig.gui.beans.swing.JButton;

import com.hardcode.driverManager.Driver;

import com.hardcode.driverManager.DriverLoadException;

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

import com.iver.andami.PluginServices;

import com.iver.andami.messages.NotificationManager;

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

import com.iver.cit.gvsig.SingleVectorialDBConnectionExtension;

import com.iver.cit.gvsig.addlayer.AddLayerDialog;

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

import com.iver.cit.gvsig.fmap.core.ICanReproject;

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

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

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

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

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

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

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

import com.iver.cit.gvsig.fmap.drivers.db.utils.ConnectionWithParams;

import com.iver.cit.gvsig.fmap.drivers.db.utils.SingleDBConnectionManager;

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

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

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

import com.iver.cit.gvsig.project.documents.view.gui.BaseView;

import com.iver.utiles.swing.JPasswordDlg;

import com.prodevelop.cit.gvsig.vectorialdb.wizard.AvailableTablesCheckBoxList;

import com.prodevelop.cit.gvsig.vectorialdb.wizard.DBConnectionParamsDialog;

import com.prodevelop.cit.gvsig.vectorialdb.wizard.TablesListItem;

import com.prodevelop.cit.gvsig.vectorialdb.wizard.TablesListItemSimple;

import com.prodevelop.cit.gvsig.vectorialdb.wizard.UserSelectedFieldsPanel;

import com.prodevelop.cit.gvsig.vectorialdb.wizard.UserTableSettingsPanel;

import com.prodevelop.cit.gvsig.vectorialdb.wizard.WizardVectorialDB;

/**

 * DOCUMENT ME!

 *

 * @author Fernando Gonz?lez Cort?s

 * @author jldominguez

 */

public class DataBaseOpenDialog extends JPanel implements ActionListener {

        private AddLayerDialog parent_dialog = null;

        private int _width = 500;

        private int _height = 480;

        private int _margin = 6;

        private int _conn_height = 55;

        private int _conn_button_height = 21;

        private int _conn_button_width = 26;

    /**

     * This is the default constructor

     */

    public DataBaseOpenDialog(AddLayerDialog dlg) {

        super();

        parent_dialog = dlg;

        initialize();

    }

    /**

     * This is the default constructor

     */

    public DataBaseOpenDialog() {

        super();

        initialize();

    }

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

        protected IConnection conex = null;

        private ConnectionWithParams selectedDataSource = null;

        private JPanel connPanel = null;

        private JPanel tablesPanel = null;

        private JScrollPane tablesScrollPane = null;

        private JScrollPane _fieldsScrollPane = null;

        private AvailableTablesList tablesList = null;

        private JList _fieldsList = null;

        private JComboBox datasourceComboBox = null;

        // private UserTableSettingsPanel settingsPanel = null;

        private JPanel fieldsPanel = null;

        // private UserTableSettingsPanel emptySettingsPanel = null;

        // private UserSelectedFieldsPanel emptyFieldsPanel = null;

        private JButton dbButton = null;

        // private BaseView view = null;

        private void initialize() {

                setLayout(null);

                this.setSize(_width, _height);

                add(getConnectionPanel(), null);

                loadDBDatasourcesCombo();

                getDatasourceComboBox().addActionListener(this);

                add(getTablesPanel(), null);

                add(getFieldsPanel(), null);

        }

        private JPanel getFieldsPanel() {

                if (fieldsPanel == null) {

                        fieldsPanel = new JPanel();

                        fieldsPanel.setLayout(new BorderLayout());

                        fieldsPanel.setBorder(javax.swing.BorderFactory.createTitledBorder(

                                        null, PluginServices.getText(this, "choose_table"),

                                        javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION,

                                        javax.swing.border.TitledBorder.DEFAULT_POSITION, null, null));

                        fieldsPanel.setBounds(new java.awt.Rectangle(

                                        (_width-3*_margin)/2+2*_margin,

                                        _conn_height+2*_margin,

                                        (_width-3*_margin)/2,

                                        _height-_conn_height-3*_margin));

                        fieldsPanel.add(getFieldsScrollPane(), java.awt.BorderLayout.CENTER);

                }

                return fieldsPanel;

        }

        private JScrollPane getFieldsScrollPane() {

                if (_fieldsScrollPane == null) {

                        _fieldsScrollPane = new JScrollPane();

                }

                return _fieldsScrollPane;

        }

        protected void loadDBDatasourcesCombo() {

                getDatasourceComboBox().removeAllItems();

                getDatasourceComboBox().addItem(new ConnectionWithParams());

                ConnectionWithParams[] conn = SingleDBConnectionManager.instance()

                .getAllConnections();

                if (conn == null) {

                        return;

                }

                Driver _drv = null;

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

                        _drv = SingleDBConnectionManager.getInstanceFromName(conn[i].getDrvName());

                        if (_drv != null && _drv instanceof AlphanumericDBDriver) {

                                getDatasourceComboBox().addItem(conn[i]);

                        }

                }

        }

        public void saveConns() {

                SingleVectorialDBConnectionExtension.saveAllToPersistence();

        }

        protected String getSelectedTable() {

                return null;

        }

        /**

         * This method initializes namePanel

         *

         * @return javax.swing.JPanel

         */

        private JPanel getConnectionPanel() {

                if (connPanel == null) {

                        connPanel = new JPanel();

                        connPanel.setLayout(null);

                        connPanel.setBounds(new java.awt.Rectangle(_margin, _margin, _width-2*_margin, _conn_height));

                        connPanel.setBorder(javax.swing.BorderFactory.createTitledBorder(

                                        null, PluginServices.getText(this, "choose_connection"),

                                        javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION,

                                        javax.swing.border.TitledBorder.DEFAULT_POSITION, null, null));

                        connPanel.add(getDatasourceComboBox(), null);

                        connPanel.add(getJdbcButton(), null);

                }

                return connPanel;

        }

        /**

         * This method initializes tablesPanel

         *

         * @return javax.swing.JPanel

         */

        private JPanel getTablesPanel() {

                if (tablesPanel == null) {

                        tablesPanel = new JPanel();

                        tablesPanel.setLayout(new BorderLayout());

                        tablesPanel.setBorder(javax.swing.BorderFactory.createTitledBorder(

                                        null, PluginServices.getText(this, "choose_table"),

                                        javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION,

                                        javax.swing.border.TitledBorder.DEFAULT_POSITION, null, null));

                        tablesPanel.setBounds(new java.awt.Rectangle(_margin, _conn_height+2*_margin, (_width-3*_margin)/2, _height-3*_margin-_conn_height));

                        tablesPanel.add(getTablesScrollPane(), java.awt.BorderLayout.CENTER);

                }

                return tablesPanel;

        }

        /**

         * This method initializes tablesScrollPane

         *

         * @return javax.swing.JScrollPane

         */

        private JScrollPane getTablesScrollPane() {

                if (tablesScrollPane == null) {

                        tablesScrollPane = new JScrollPane();

                }

                return tablesScrollPane;

        }

        /**

         * This method initializes tablesList

         *

         * @return javax.swing.JList

         */

        private AvailableTablesList getTablesList() {

                if (tablesList == null) {

                        tablesList = new AvailableTablesList(this);

                        DefaultListModel lmodel = new DefaultListModel();

                        tablesList.setModel(lmodel);

                        // tablesList.addListSelectionListener(this);

                }

                return tablesList;

        }

        /**

         * This method initializes jComboBox

         *

         * @return javax.swing.JComboBox

         */

        protected JComboBox getDatasourceComboBox() {

                if (datasourceComboBox == null) {

                        datasourceComboBox = new JComboBox();

                        datasourceComboBox.setBounds(new java.awt.Rectangle(

                                        _margin,

                                        3*_margin,

                                        _width-5*_margin-_conn_button_width, _conn_button_height));

                }

                return datasourceComboBox;

        }

        public void actionPerformed(ActionEvent arg0) {

                Object src = arg0.getSource();

                if (src == datasourceComboBox) {

                        Object sel_obj = datasourceComboBox.getSelectedItem();

                        if (sel_obj == null) {

                                return;

                        }

                        if (!(sel_obj instanceof ConnectionWithParams)) {

                                return;

                        }

                        selectedDataSource = (ConnectionWithParams) sel_obj;

                        setEmptyPanels();

                        if (selectedDataSource.isNull()) {

                                // empty conn selected

                                try {

                                        updateTableList(selectedDataSource);

                                        checkFinishable();

                                } catch (SQLException e) { }

                                return;

                        }

                        if (!selectedDataSource.isConnected()) {

                                if (!tryToConnect(selectedDataSource)) {

                                        datasourceComboBox.setSelectedIndex(0);

                                        return;

                                }

                        }

                        try {

                                updateTableList(selectedDataSource);

                                checkFinishable();

                        } catch (SQLException e) {

                                JOptionPane.showMessageDialog(this,

                                                PluginServices.getText(this, "Error_getting_table_names") + ": " + e.getMessage(),

                                                PluginServices.getText(this, "Error"),

                                                JOptionPane.ERROR_MESSAGE);

                                setEmptyPanels();

                                return;

                        }

                        if (tablesList.getModel().getSize() == 0) {

                                JOptionPane.showMessageDialog(

                                                this,

                                                PluginServices.getText(this, "No_tables_listed_maybe_schema_case_issue"),

                                                PluginServices.getText(this, "Error"),

                                                JOptionPane.WARNING_MESSAGE);

                                return;

                        }

                        return;

                }

                if (src == dbButton) {

                        ConnectionWithParams sel = addNewConnection();

                        if (sel != null) {

                                loadDBDatasourcesCombo();

                                getDatasourceComboBox().setSelectedItem(sel);

                        }

                }

        }

        private void setEmptyPanels() {

                ((DefaultListModel) getTablesList().getModel()).clear();

                getTablesScrollPane().updateUI();

                ((TitledBorder) getFieldsPanel().getBorder()).setTitle(

                                PluginServices.getText(this, "Fields_for_table") + ": -");

                ((DefaultListModel) getFieldsList().getModel()).clear();

                getFieldsScrollPane().updateUI();

                checkFinishable();

        }

        private boolean tryToConnect(ConnectionWithParams _cwp) {

                JPasswordDlg dlg = new JPasswordDlg();

                dlg.setLocationRelativeTo((Component)PluginServices.getMainFrame());

                String strMessage = PluginServices.getText(this, "conectar_jdbc");

                String strPassword = PluginServices.getText(this, "password");

                dlg.setMessage(strMessage + " [" + _cwp.getDrvName() + ", " +

                                _cwp.getHost() + ", " + _cwp.getPort() + ", " + _cwp.getDb() +

                                ", " + _cwp.getUser() + "]. " + strPassword + "?");

                dlg.setVisible(true);

                String clave = dlg.getPassword();

                if (clave == null) {

                        return false;

                }

                try {

                        _cwp.connect(clave);

                }

                catch (DBException e) {

                        showConnectionErrorMessage(e.getMessage());

                        return false;

                }

                return true;

        }

        private void updateTableList(ConnectionWithParams src) throws SQLException {

                if (src.isNull()) {

                        getTablesList().setModel(new DefaultListModel());

                        getTablesScrollPane().setViewportView(tablesList);

                        getTablesScrollPane().updateUI();

                        return;

                }

                conex = src.getConnection();

                ConnectionJDBC jdbc_conn = null;

                DefaultListModel lmodel = new DefaultListModel();

                if (conex instanceof ConnectionJDBC) {

                        jdbc_conn = (ConnectionJDBC) conex; 

                } else {

                        getTablesList().setModel(lmodel);

                        getTablesScrollPane().setViewportView(tablesList);

                        getTablesScrollPane().updateUI();

                        throw new SQLException("Unknown connection type: " + conex.getClass().getName());

                }

                String[] ret_types = {"TABLE", "VIEW"};

                ResultSet rs = null;

                try {

                        rs = jdbc_conn.getConnection().getMetaData().getTables(

                                        null,

                                        src.getSchema().length() == 0 ? null : src.getSchema(),

                                        null,

                                        ret_types);

                } catch (SQLException e1) {

                        throw e1;

                }

                String _n = "";

                String _t = "";

                String _s = "";

                while (rs.next()) {

                        _s = rs.getString(2);

                        _n = rs.getString(3);

                        _n = (_s == null || _s.length()==0) ? _n : _s + "." + _n; 

                        _t = rs.getString(4);

                        lmodel.addElement( new TablesListItemSimple(_n, _t, src.getConnection()) );

                }

                rs.close();

                getTablesList().setModel(lmodel);

                getTablesScrollPane().setViewportView(tablesList);

                getTablesScrollPane().updateUI();

        }

        private boolean validFormSettings() {

                int count = tablesList.getModel().getSize();

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

                        TablesListItemSimple item = (TablesListItemSimple) tablesList.getModel().getElementAt(i);

                        if (item.isSelected()) {

                                return true;

                        }

                }

                return false;

        }

        public void checkFinishable() {

                boolean finishable = validFormSettings();

                parent_dialog.getJPanel().getOkButton().setEnabled(finishable);

        }

        /**

         * This method initializes jdbcButton

         *

         * @return javax.swing.JButton

         */

         private JButton getJdbcButton() {

                if (dbButton == null) {

                        dbButton = new JButton();

                        dbButton.addActionListener(this);

                        dbButton.setToolTipText(PluginServices.getText(this,

                                        "add_connection"));

                        dbButton.setBounds(new java.awt.Rectangle(

                                        _width-3*_margin-_conn_button_width,

                                        3*_margin,

                                        _conn_button_width, _conn_button_height));

                        String _file = createResourceUrl("images/jdbc.png").getFile();

                        dbButton.setIcon(new ImageIcon(_file));

                }

                return dbButton;

         }

         private ConnectionWithParams addNewConnection() {

                 ConnectionWithParams resp = null;

                 DBConnectionParamsDialog newco = new DBConnectionParamsDialog();

                 newco.showDialog();

                 if (newco.isOkPressed()) {

                         String _drvname = newco.getConnectionDriverName();

                         String _host = newco.getConnectionServerUrl();

                         String _port = newco.getConnectionPort();

                         String _dbname = newco.getConnectionDBName();

                         String _user = newco.getConnectionUser();

                         String _pw = newco.getConnectionPassword();

                         String _sche = newco.getConnectionSchema();

                         String _conn_usr_name = newco.getConnectionName();

                         boolean hasToBeCon = newco.hasToBeConnected();

                         try {

                                 resp = SingleDBConnectionManager.instance()

                                 .getConnection(_drvname,

                                                 _user, _pw, _conn_usr_name, _host, _port, _dbname, _sche,

                                                 hasToBeCon);

                         }

                         catch (DBException e) {

                                 showConnectionErrorMessage(e.getMessage());

                                 return null;

                         }

                         SingleVectorialDBConnectionExtension.saveAllToPersistence();

                         return resp;

                 }

                 else {

                         return null;

                 }

         }

         private void showConnectionErrorMessage(String _msg) {

                 String msg = (_msg.length() > 300) ? "" : (": " + _msg);

                 String title = PluginServices.getText(this, "connection_error");

                 JOptionPane.showMessageDialog(this, title + msg, title,

                                 JOptionPane.ERROR_MESSAGE);

         }

         private java.net.URL createResourceUrl(String path) {

                 return getClass().getClassLoader().getResource(path);

         }

        public String getDriverName() {

                if (selectedDataSource == null) {

                        logger.error("CWP is NULL (?)");

                        return null;

                } else {

                        return selectedDataSource.getDrvName();

                }

        }

        public String getPort() {

                if (selectedDataSource == null) {

                        logger.error("CWP is NULL (?)");

                        return null;

                } else {

                        return selectedDataSource.getPort();

                }

        }

        public String getHost() {

                if (selectedDataSource == null) {

                        logger.error("CWP is NULL (?)");

                        return null;

                } else {

                        return selectedDataSource.getHost();

                }

        }

        public String getDataBase() {

                if (selectedDataSource == null) {

                        logger.error("CWP is NULL (?)");

                        return null;

                } else {

                        return selectedDataSource.getDb();

                }

        }

        public String getUser() {

                if (selectedDataSource == null) {

                        logger.error("CWP is NULL (?)");

                        return null;

                } else {

                        return selectedDataSource.getUser();

                }

        }

        public String getPassword() {

                if (selectedDataSource == null) {

                        logger.error("CWP is NULL (?)");

                        return null;

                } else {

                        return selectedDataSource.getPw();

                }

        }

        public String getTable() {

                ListModel lm = getTablesList().getModel();

                int sz = lm.getSize();

                TablesListItemSimple item = null;

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

                        if (lm.getElementAt(i) instanceof TablesListItemSimple) {

                                item = (TablesListItemSimple) lm.getElementAt(i);

                                if (item.isSelected()) {

                                        return item.getTableName();

                                }

                        }

                }

                logger.error("NO check box selected in table list (?)");

                return "";

        }

        public boolean setActingTable(TablesListItemSimple acttab) {

                String drvn = selectedDataSource.getDrvName();

                IConnection iconn = selectedDataSource.getConnection();

                Driver drv = SingleDBConnectionManager.getInstanceFromName(drvn);

                String tn = "";

                if (drv instanceof AlphanumericDBDriver && iconn instanceof ConnectionJDBC) {

                        ConnectionJDBC conn = (ConnectionJDBC) iconn;

                        AlphanumericDBDriver alpha_drv = (AlphanumericDBDriver) drv;

                        tn = acttab.getTableName();

                        String _sql = "SELECT * FROM " + tn + " WHERE (0=1)";

                        FieldDescription[] fd = null;

                        try {

                                alpha_drv.open(conn.getConnection(), _sql);

                                fd = alpha_drv.getTableDefinition().getFieldsDesc();

                        } catch (Exception ex) {

                                logger.error("While getting fields: " + ex.getMessage());

                                JOptionPane.showMessageDialog(this,

                                                PluginServices.getText(this, "Error_while_getting_table_fields") + ": " + ex.getMessage(),

                                                PluginServices.getText(this, "Error"),

                                                JOptionPane.ERROR_MESSAGE);

                                return false;

                        }

                        int fld_cnt = fd.length;

                        ((DefaultListModel) getFieldsList().getModel()).clear();

                        String ft = "Other";

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

                                String fn = fd[i].getFieldName();

                                try {

                                        ft = typeToString(fd[i].getFieldType());

                                } catch (Exception ex) {

                                        ft = "Other";

                                }

                                ((DefaultListModel) getFieldsList().getModel()).addElement(

                                                new FieldListItem(fn,ft));

                        }

                        this.getFieldsScrollPane().setViewportView(getFieldsList());

                        getFieldsScrollPane().updateUI();

                        ((TitledBorder) getFieldsPanel().getBorder()).setTitle(

                                        PluginServices.getText(this, "Fields_for_table") + ": " + tn);

                        try {

                                alpha_drv.close();

                        } catch (Exception ex) {

                                logger.error("Unreported error while closing temp driver: " + ex.getMessage());

                        }

                        alpha_drv = null;

                        return true;

                } else {

                        logger.error("Unexpacted driver or conn class, drv : " + drv.getClass().getName());

                        logger.error("Unexpacted driver or conn class, conn: " + iconn.getClass().getName());

                        return false;

                }

        }

        public static String typeToString(int sqlType) {

                switch (sqlType) {

                case Types.BIGINT:

                case Types.INTEGER:

                case Types.SMALLINT:

                case Types.TINYINT:

                        return "Integer";

                case Types.NUMERIC:

                        return "Numeric";

                case Types.BIT:

                case Types.BOOLEAN:

                        return "Boolean";

                case Types.CHAR:

                case Types.VARCHAR:

                case Types.LONGVARCHAR:

                        return "String";

                case Types.DATE:

                        return "Date";

                case Types.FLOAT:

                case Types.DOUBLE:

                case Types.DECIMAL:

                case Types.REAL:

                        return "Double";

                case Types.BINARY:

                case Types.VARBINARY:

                case Types.LONGVARBINARY:

                        return "Binary";

                case Types.TIMESTAMP:

                        return "Timestamp";

                case Types.TIME:

                        return "Time";

                case Types.OTHER:

                default:

                        throw new RuntimeException("Type not recognized: " + sqlType);

                }

        }

        private JList getFieldsList() {

                if (_fieldsList == null) {

                        _fieldsList = new JList();

                        _fieldsList.setSelectionModel(new NoSelectionModel());

                        DefaultListModel lmodel = new DefaultListModel();

                        _fieldsList.setModel(lmodel);

                }

                return _fieldsList;

        }

        private class FieldListItem extends JLabel {

                private String name = "";

                private String type = "";

                public FieldListItem(String _n, String _t) {

                        name = _n;

                        type = _t;

                }

                public String toString() {

                        if (name == null || name.length() == 0) {

                                return "[-]";

                        } else {

                                return (type == null || type.length() == 0) ? name : (name+" [" + type + "]");

                        }

                }

        }

        private class NoSelectionModel extends DefaultListSelectionModel {

                public NoSelectionModel() {

                }

                public void addSelectionInterval(int a, int b) {  }

                public boolean isSelectedIndex(int a) { return false; }

                public boolean isSelectionEmpty() { return true; }

        }

        public void clearFieldsList() {

                ((DefaultListModel) getFieldsList().getModel()).clear();

                getFieldsScrollPane().updateUI();

        }

} 

// [eiel-gestion-conexiones]