Application: gvSIG desktop » gvSIG data provider for WFS

package org.gvsig.wfs.gui.wizards;

import java.awt.FlowLayout;

import java.awt.event.KeyAdapter;

import java.awt.event.KeyEvent;

import java.awt.geom.Rectangle2D;

import java.net.MalformedURLException;

import java.net.URL;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

import java.util.prefs.Preferences;

import javax.swing.DefaultComboBoxModel;

import javax.swing.JCheckBox;

import javax.swing.JComboBox;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.JTabbedPane;

import javax.swing.event.ChangeEvent;

import javax.swing.event.ChangeListener;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.gvsig.andami.PluginServices;

import org.gvsig.andami.messages.NotificationManager;

import org.gvsig.andami.persistence.serverData.ServerDataPersistence;

import org.gvsig.app.gui.WizardPanel;

import org.gvsig.app.panelGroup.loaders.PanelGroupLoaderFromExtensionPoint;

import org.gvsig.fmap.dal.DALLocator;

import org.gvsig.fmap.dal.DataManager;

import org.gvsig.fmap.dal.DataStoreParameters;

import org.gvsig.fmap.dal.serverexplorer.wfs.WFSServerExplorer;

import org.gvsig.fmap.dal.serverexplorer.wfs.WFSServerExplorerParameters;

import org.gvsig.fmap.dal.store.wfs.WFSStoreParameters;

import org.gvsig.gui.beans.Messages;

import org.gvsig.gui.beans.panelGroup.PanelGroupManager;

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

import org.gvsig.remoteclient.wfs.WFSProtocolHandlerFactory;

import org.gvsig.tools.exception.BaseException;

import org.gvsig.utils.NotExistInXMLEntity;

import org.gvsig.utils.XMLEntity;

import org.gvsig.utils.swing.jcomboServer.JComboServer;

import org.gvsig.utils.swing.jcomboServer.ServerData;

import org.gvsig.wfs.gui.panels.WFSParamsPanel;

/* 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

 */

/**

 * <p>

 * Wizard that allows add a new WFS layer.

 * </p>

 * 

 * @author Jorge Piera Llodr? (piera_jor@gva.es)

 * @author Pablo Piqueras Bartolom? (pablo.piqueras@iver.es)

 */

public class WFSWizard extends WizardPanel {

    private static Logger logger = LoggerFactory.getLogger(WFSWizard.class);

    private int page;

    private boolean connected = false;

    private JComboServer cmbHost = null;

    private JButton btnConnect = null;

    private javax.swing.JPanel jPanel = null;

    private javax.swing.JLabel jLabel1 = null;

    private javax.swing.JLabel lblTitle = null;

    private javax.swing.JScrollPane jScrollPane = null;

    private javax.swing.JTextArea txtAbstract = null;

    private javax.swing.JPanel panelPage1 = null;

    private javax.swing.JPanel pnlName = null;

    private JButton btnSiguiente = null;

    private JButton btnAnterior = null;

    private JLabel serverVersionLabel = null;

    private JLabel serverAvailableVersionLabel = null;

    private JLabel cacheFeatLabel = null;

    private JComboBox cacheFeatCombo = null;

    private javax.swing.JPanel jPanel1 = null;

    private WFSParamsPanel wfsParamsPanel = null;

    private WFSWizard thisWFSPanel = null;

    private WFSServerExplorer serverExplorer = null;

    private JCheckBox chkCaching = null;

    private static Preferences fPrefs = Preferences.userRoot().node(

        "gvsig.wfs-wizard");

    private boolean refreshing = fPrefs.getBoolean("refresh_capabilities",

        false);

    private final String wfs_properties_extensionpoint_name =

        "WFSPropertiesDialog";

    /**

     * This is the default constructor

     */

    public WFSWizard() {

        super();

        initialize();

    }

    /**

     * This method initializes this

     */

    private void initialize() {

        setTabName(PluginServices.getText(this, "WFS"));

        serverVersionLabel = new JLabel();

        serverVersionLabel.setBounds(30, 425, 100, 21);

        serverVersionLabel.setText(PluginServices.getText(this, "_Server_version") + ":");

        serverAvailableVersionLabel = new JLabel();

        serverAvailableVersionLabel.setBounds(135, 425, 90, 21);

        cacheFeatLabel = new JLabel();

        cacheFeatLabel.setBounds(30, 450, 100, 21);

        cacheFeatLabel.setText(PluginServices.getText(this, "_Feature_cache") + ":");

        cacheFeatCombo = new JComboBox();

        cacheFeatCombo.addItem(PluginServices.getText(this, "none"));

        cacheFeatCombo.setEnabled(false);

        cacheFeatCombo.setBounds(135, 450, 90, 21);

        this.setLayout(null);

        this.setVisible(true);

        this.add(getPanelPage1(), null);

        page = 0;

        this.add(getPanelPage2(), null);

        this.add(getBtnAnterior(), null);

        this.add(getBtnSiguiente(), null);

        this.add(serverVersionLabel, null);

        this.add(serverAvailableVersionLabel, null);

        this.add(cacheFeatLabel, null);

        this.add(cacheFeatCombo, null);

        uptateNavigatingButtons();

        thisWFSPanel = this;

    }

    /**

     * Adds the host addres to a persistent data storage.

     * 

     * @param host

     *            the host of the server

     */

    private void addHost(String host) {

        host = host.trim();

        ServerDataPersistence persistence =

            new ServerDataPersistence(this, ServerData.SERVER_TYPE_WFS);

        persistence.addServerData(new ServerData(host,

            ServerData.SERVER_TYPE_WFS));

    }

    /**

     * Fills up the initial WCSWizard controls.

     * 

     * jaume

     */

    private void rellenarControles() throws Exception {

        try {

            String url = cmbHost.getModel().getSelectedItem().toString();

            DataManager dataManager = DALLocator.getDataManager();

            // Create the server explorer parameters

            WFSServerExplorerParameters parameters =

                (WFSServerExplorerParameters) dataManager

                    .createServerExplorerParameters(WFSServerExplorer.NAME);

            parameters.setUrl(url);

            addHost(url);

            // Create the server explorer

            serverExplorer =

                (WFSServerExplorer) dataManager

                    .createServerExplorer(parameters);

            // Update the forms

            getLblTitle().setText(serverExplorer.getTitle());

            getTxtAbstract().setText(serverExplorer.getAbstract());

            List sel_ver =

                WFSProtocolHandlerFactory.getRequestableVersions(url);

            wfsParamsPanel.getOptionsPanel().refreshVersions(sel_ver);

            if (sel_ver == null || sel_ver.size() == 0) {

                serverAvailableVersionLabel.setText("-");

            } else {

                serverAvailableVersionLabel.setText(

                    sel_ver.get(0).toString().trim());

                for (int i=1; i<sel_ver.size(); i++) {

                    String txt = serverAvailableVersionLabel.getText();

                    txt = txt + ", " + sel_ver.get(i).toString().trim();

                    serverAvailableVersionLabel.setText(txt);

                }

            }

            serverAvailableVersionLabel.repaint();

            List cacheProviders = dataManager.getFeatureCacheProviders();

            Iterator<String> iter = cacheProviders.iterator();

            while (iter.hasNext()) {

                String featureCacheProvider = (String) iter.next();

                cacheFeatCombo.addItem(featureCacheProvider);

            }

            if (!serverExplorer.getServerType().toLowerCase()

                .startsWith("wfs 1.0")) {

                cacheFeatCombo.setEnabled(true);

            } else {

                cacheFeatCombo.setEnabled(false);

            }

            wfsParamsPanel.setServerExplorer(serverExplorer);

            connected = true;

        } catch (Exception e) {

            throw e;

        }

    }

    /**

     * Enables or disables the Next and Previous buttons according with the

     * current

     * page and the enabled pages.

     */

    private void uptateNavigatingButtons() {

        if (page == 0) {

            getBtnAnterior().setEnabled(false);

            getBtnSiguiente().setVisible(true);

            getBtnSiguiente().setEnabled(false);

        } else {

            short tabIndex = (short) wfsParamsPanel.getSelectedIndex();

            getBtnAnterior().setEnabled(true);

            if (wfsParamsPanel.nextPageEnabled() == -1) {

                getBtnSiguiente().setEnabled(false);

                if (tabIndex == (wfsParamsPanel.getPanelInGUICount() - 1))

                    getBtnSiguiente().setVisible(false);

            } else {

                getBtnSiguiente().setVisible(true);

                getBtnSiguiente().setEnabled(true);

            }

        }

    }

    /**

     * This method initializes txtHost from the persistent data storage

     * 

     * @return javax.swing.JTextField

     */

    private javax.swing.JComboBox getTxtHost() {

        if (cmbHost == null) {

            cmbHost = new JComboServer();

            cmbHost.setModel(new DefaultComboBoxModel());

            cmbHost.setPreferredSize(new java.awt.Dimension(350, 20));

            cmbHost.setBounds(11, 26, 454, 20);

            cmbHost.setEditable(true);

            ServerDataPersistence persistence =

                new ServerDataPersistence(this, ServerData.SERVER_TYPE_WFS);

            ServerData[] servers = persistence.getArrayOfServerData();

            if (servers.length == 0) {

                PluginServices ps = PluginServices.getPluginServices(this);

                XMLEntity xml = ps.getPersistentXML();

                try {

                    String[] oldServers =

                        xml.getStringArrayProperty("wfs-servers");

                    servers = new ServerData[oldServers.length];

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

                        servers[i] =

                            new ServerData(oldServers[i],

                                ServerData.SERVER_TYPE_WMS);

                    }

                    xml.remove("wfs-servers");

                    ps.setPersistentXML(xml);

                } catch (NotExistInXMLEntity e) {

                    servers = new ServerData[4];

                    servers[3] = new ServerData(

                        "http://www.idee.es/IGN-WFS-SIGLIM/ogcwebservice?",

                        ServerData.SERVER_TYPE_WFS);

                    servers[2] = new ServerData(

                        "http://sd1878-2.sivit.org/geoserver/wfs",

                        ServerData.SERVER_TYPE_WFS);

                    servers[1] = new ServerData(

                        "http://nsidc.org/cgi-bin/atlas_north?service=WFS",

                        ServerData.SERVER_TYPE_WFS);

                    servers[0] = new ServerData(

                        "http://siu.vivienda.es/geoserver/wfs?",

                        ServerData.SERVER_TYPE_WFS);

                }

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

                    persistence.addServerData(servers[i]);

                }

                persistence.setPersistent();

            }

            cmbHost.setServerList(servers);

            // Allows that user can start the connection to the written server

            // pressing the 'Enter' key

            cmbHost.getEditor().getEditorComponent()

                .addKeyListener(new KeyAdapter() {

                    /*

                     * (non-Javadoc)

                     * 

                     * @see

                     * java.awt.event.KeyAdapter#keyReleased(java.awt.event.

                     * KeyEvent)

                     */

                    public void keyReleased(KeyEvent e) {

                        if (e.getKeyCode() == KeyEvent.VK_ENTER) {

                            getBtnConnect().doClick();

                        }

                    }

                });

        }

        return cmbHost;

    }

    /**

     * This method initializes btnDetalles

     * 

     * @return JButton

     */

    private JButton getBtnConnect() {

        if (btnConnect == null) {

            btnConnect = new JButton();

            btnConnect.setPreferredSize(new java.awt.Dimension(100, 20));

            btnConnect.setBounds(366, 50, 100, 20);

            btnConnect.setText(PluginServices.getText(this, "connect"));

            btnConnect.addActionListener(new java.awt.event.ActionListener() {

                public void actionPerformed(java.awt.event.ActionEvent e) {

                    /*

                     * Check if there is a suspicious parameter in URL

                     * The user should approve it

                     */

                    if (!checkServerUrl()) {

                        return;

                    }

                    btnConnect.setEnabled(false); // This avoids multiple

                                                  // contiguous actions

                    try {

                        rellenarControles();

                        wfsParamsPanel.refreshCapabilitiesInfo();

                        wfsParamsPanel.refreshWFSSelectFeaturePanel();

                        wfsParamsPanel.enableDefaultTabs(false);

                        btnConnect.setEnabled(true); // This avoids multiple

                                                     // contiguous actions

                        getBtnSiguiente().setEnabled(true);

                        getBtnSiguiente().requestFocus(); // Sets focus to the

                                                          // 'next' button

                    } catch (Exception e1) {

                        String msg = WFSWizard.getLastMessage(e1);

                        JOptionPane.showMessageDialog(

                            thisWFSPanel,

                            Messages.getText("cant_connect") + ":\n\n"

                            + msg,

                            Messages.getText("error"),

                            JOptionPane.ERROR_MESSAGE);

                        btnConnect.setEnabled(true);

                    }

                    /**

                     * Force panel not valid because connect button

                     * has been pressed

                     */

                    thisWFSPanel.callStateChanged(false);

                }

            });

            // If user press the 'Enter' key -> advance

            btnConnect.addKeyListener(new KeyAdapter() {

                /*

                 * (non-Javadoc)

                 * 

                 * @see

                 * java.awt.event.KeyListener#keyReleased(java.awt.event.KeyEvent

                 * )

                 */

                public void keyReleased(KeyEvent e) {

                    if (e.getKeyCode() == KeyEvent.VK_ENTER) {

                        btnConnect.doClick();

                    }

                }

            });

        }

        return btnConnect;

    }

    /**

     * This method initializes jPanel

     * 

     * @return javax.swing.JPanel

     */

    private javax.swing.JPanel getJPanel() {

        if (jPanel == null) {

            jPanel = new javax.swing.JPanel();

            jPanel.setLayout(null);

            jPanel.setPreferredSize(new java.awt.Dimension(470, 130));

            jPanel.setBorder(javax.swing.BorderFactory.createTitledBorder(null,

                PluginServices.getText(this, "descripcion"),

                javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION,

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

            jPanel.setBounds(2, 96, 477, 304);

            jPanel.add(getJScrollPane(), null);

            jPanel.add(getPnlName(), null);

        }

        return jPanel;

    }

    /**

     * This method initializes pnlName

     * 

     * @return javax.swing.JPanel

     */

    private JPanel getPnlName() {

        if (pnlName == null) {

            pnlName = new JPanel(new FlowLayout(FlowLayout.LEFT, 10, 0));

            pnlName.setBounds(new java.awt.Rectangle(9, 19, 452, 24));

            pnlName.add(getJLabel1(), null);

            pnlName.add(getLblTitle(), null);

        }

        return pnlName;

    }

    /**

     * This method initializes jLabel1

     * 

     * @return javax.swing.JLabel

     */

    private javax.swing.JLabel getJLabel1() {

        if (jLabel1 == null) {

            jLabel1 = new javax.swing.JLabel();

            jLabel1.setText(PluginServices.getText(this, "nombre") + ":");

            jLabel1.setBounds(15, 26, 65, 15);

        }

        return jLabel1;

    }

    /**

     * This method initializes lblTitle

     * 

     * @return javax.swing.JLabel

     */

    private javax.swing.JLabel getLblTitle() {

        if (lblTitle == null) {

            lblTitle = new javax.swing.JLabel();

            lblTitle.setText("-");

            lblTitle.setPreferredSize(new java.awt.Dimension(350, 16));

            lblTitle.setBounds(82, 26, 350, 16);

        }

        return lblTitle;

    }

    /**

     * This method initializes jScrollPane

     * 

     * @return javax.swing.JScrollPane

     */

    private javax.swing.JScrollPane getJScrollPane() {

        if (jScrollPane == null) {

            jScrollPane = new javax.swing.JScrollPane();

            jScrollPane.setViewportView(getTxtAbstract());

            jScrollPane.setPreferredSize(new java.awt.Dimension(450, 60));

            jScrollPane.setBounds(10, 47, 457, 247);

        }

        return jScrollPane;

    }

    /**

     * This method initializes txtAbstract

     * 

     * @return javax.swing.JTextArea

     */

    private javax.swing.JTextArea getTxtAbstract() {

        if (txtAbstract == null) {

            txtAbstract = new javax.swing.JTextArea();

            txtAbstract.setWrapStyleWord(true);

            txtAbstract.setColumns(30);

            txtAbstract.setLineWrap(true);

        }

        return txtAbstract;

    }

    /**

     * This method initializes panelPage1

     * 

     * @return javax.swing.JPanel

     */

    private javax.swing.JPanel getPanelPage1() {

        if (panelPage1 == null) {

            panelPage1 = new javax.swing.JPanel();

            panelPage1.setLayout(null);

            panelPage1.setPreferredSize(new java.awt.Dimension(480, 220));

            panelPage1.setVisible(true);

            panelPage1.setBounds(15, 5, 480, 407);

            panelPage1.add(getJPanel1(), null);

            panelPage1.add(getJPanel(), null);

        }

        return panelPage1;

    }

    /**

     * This method initializes panelPage2

     * 

     * @return javax.swing.JPanel

     */

    private javax.swing.JPanel getPanelPage2() {

        if (wfsParamsPanel == null) {

            try {

                PanelGroupManager manager = PanelGroupManager.getManager();

                manager.registerPanelGroup(WFSParamsPanel.class);

                manager.setDefaultType(WFSParamsPanel.class);

                // Initially there is no layer

                wfsParamsPanel = (WFSParamsPanel) manager.getPanelGroup(null);

                wfsParamsPanel.setBounds(4, 9, 502, 393);

                wfsParamsPanel

                    .loadPanels(new PanelGroupLoaderFromExtensionPoint(

                        wfs_properties_extensionpoint_name));

                wfsParamsPanel.addChangeListener(new ChangeListener() {

                    // This method is called whenever the selected tab changes

                    public void stateChanged(ChangeEvent evt) {

                        JTabbedPane pane = (JTabbedPane) evt.getSource();

                        // Update the navigation buttons

                        uptateNavigatingButtons();

                    }

                });

            } catch (BaseException bE) {

                NotificationManager.showMessageError(

                    bE.getLocalizedMessageStack(), bE);

            } catch (Exception e) {

                NotificationManager

                    .showMessageError(e.getLocalizedMessage(), e);

            }

        }

        return wfsParamsPanel;

    }

    /**

     * This method initializes btnSiguiente

     * 

     * @return JButton

     */

    private JButton getBtnSiguiente() {

        if (btnSiguiente == null) {

            btnSiguiente = new JButton();

            btnSiguiente.setPreferredSize(new java.awt.Dimension(100, 30));

            btnSiguiente.setBounds(395, 444, 100, 20);

            btnSiguiente.setText(PluginServices.getText(this, "siguiente"));

            btnSiguiente.addActionListener(new java.awt.event.ActionListener() {

                public void actionPerformed(java.awt.event.ActionEvent e) {

                    if (page == 0) {

                        page = 1;

                        getPanelPage1().setVisible(false);

                        getPanelPage2().setVisible(true);

                    } else {

                        wfsParamsPanel.goToNextTab();

                    }

                    uptateNavigatingButtons();

                }

            });

        }

        return btnSiguiente;

    }

    /**

     * This method initializes btnAnterior

     * 

     * @return JButton

     */

    private JButton getBtnAnterior() {

        if (btnAnterior == null) {

            btnAnterior = new JButton();

            btnAnterior.setBounds(292, 444, 100, 20);

            btnAnterior.setText(PluginServices.getText(this, "anterior"));

            btnAnterior.setPreferredSize(new java.awt.Dimension(100, 30));

            btnAnterior.addActionListener(new java.awt.event.ActionListener() {

                public void actionPerformed(java.awt.event.ActionEvent e) {

                    int tabIndex = wfsParamsPanel.getSelectedIndex();

                    if (page == 1) {

                        if (tabIndex == 0) {

                            page = 0;

                            connected = false;

                            wfsParamsPanel.enableDefaultTabs(false);

                            getLblTitle().setText("-");

                            getTxtAbstract().setText("");

                            getPanelPage2().setVisible(false);

                            getPanelPage1().setVisible(true);

                        } else {

                            wfsParamsPanel.goToPreviousTab();

                        }

                    } else {

                    }

                    uptateNavigatingButtons();

                }

            });

        }

        return btnAnterior;

    }

    /**

     * This method initializes jPanel1

     * 

     * @return javax.swing.JPanel

     */

    private javax.swing.JPanel getJPanel1() {

        if (jPanel1 == null) {

            jPanel1 = new javax.swing.JPanel();

            jPanel1.setLayout(null);

            jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder(

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

                javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION,

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

            jPanel1.setBounds(2, 5, 477, 85);

            jPanel1.add(getTxtHost(), null);

            jPanel1.add(getBtnConnect(), null);

            jPanel1.add(getChkCaching(), null);

        }

        return jPanel1;

    }

    /**

     * Returns the wizard's data source

     * 

     * @return the wizard's data source

     */

    public WFSServerExplorer getServerExplorer() {

        return serverExplorer;

    }

    /**

     * Returns the rectangle that contains all the others

     * 

     * @param rects

     *            [] rectangles with its positions and dimensions

     * 

     * @return Rectangle2D the rectangle that contains all the others

     */

    public static Rectangle2D getRectangle(Rectangle2D[] rects) {

        Rectangle2D ret = rects[0];

        for (int i = 1; i < rects.length; i++) {

            ret.add(rects[i]);

        }

        return ret;

    }

    /**

     * Returns the host typed in the host text field or null if nothing is typed

     * or it is not a valid URL.

     * 

     * @return URL del host

     */

    public URL getHost() {

        try {

            return new URL(cmbHost.getModel().getSelectedItem().toString());

        } catch (MalformedURLException e) {

            return null;

        }

    }

    /*

     * (non-Javadoc)

     * 

     * @see com.iver.cit.gvsig.gui.WizardPanel#initWizard()

     */

    public void initWizard() {

        // setServerExplorer(new WFSWizardData());

    }

    /*

     * (non-Javadoc)

     * 

     * @see com.iver.cit.gvsig.gui.WizardPanel#execute()

     */

    public void execute() {

        wfsParamsPanel.setSelectedCache(cacheFeatCombo.getSelectedItem().toString());

        String layerName = wfsParamsPanel.getFeaturesPanel().getLayerName();

        WFSStoreParameters parameters;

        try {

            //

            // TODO: La proyeccion deberia ir en los parametros ?? !!!!!!!!!

            // 

            parameters = wfsParamsPanel.getDataStoreParameters();

        } catch (Exception e) {

            logger.warn("Can't make the parameters of the wfs layer", e);

            JOptionPane.showMessageDialog(null,

                PluginServices.getText(this, "_cant_create_wfslayer"),

                "addLayer", JOptionPane.WARNING_MESSAGE

                    + JOptionPane.OK_OPTION);

            return;

        }

        doAddLayer(getMapCtrl(), layerName, parameters);

    }

    /**

     * This method initializes chkCaching

     * 

     * @return javax.swing.JCheckBox

     */

    private JCheckBox getChkCaching() {

        if (chkCaching == null) {

            chkCaching = new JCheckBox();

            chkCaching.setBounds(7, 51, 349, 20);

            chkCaching.setText(PluginServices.getText(this,

                "refresh_capabilities"));

            chkCaching.setToolTipText(PluginServices.getText(this,

                "refresh_capabilities_tooltip"));

            chkCaching.setSelected(refreshing);

            chkCaching.addItemListener(new java.awt.event.ItemListener() {

                public void itemStateChanged(java.awt.event.ItemEvent e) {

                    refreshing = chkCaching.isSelected();

                }

            });

            chkCaching.addActionListener(new java.awt.event.ActionListener() {

                public void actionPerformed(java.awt.event.ActionEvent e) {

                    chkCaching.setEnabled(false); // This avoids multiple

                                                  // contiguous actions

                    fPrefs.putBoolean("refresh_capabilities",

                        chkCaching.isSelected());

                    chkCaching.setEnabled(true); // This avoids multiple

                                                 // contiguous actions

                }

            });

        }

        return chkCaching;

    }

    /**

     * This method makes the 'btnSiguiente' to be clicked

     */

    public void doClickOnNextButton() {

        getBtnSiguiente().doClick();

    }

    /*

     * (non-Javadoc)

     * 

     * @see com.iver.cit.gvsig.gui.WizardPanel#getParameters()

     */

    public DataStoreParameters[] getParameters() {

        // TODO Auto-generated method stub

        return null;

    }

    @Override

    public void close() {

        if (serverExplorer != null) {

            serverExplorer.dispose();

        }

    }

    /**

     * This method is called when user changes tab in add layer dialog

     */

    public boolean areSettingsValid() {

        if (wfsParamsPanel != null) {

            return wfsParamsPanel.isCorretlyConfigured();

        } else {

            return false;

        }

    }

    /**

     * This method suggests user to remove suspicious parameters

     * such as "request=..."

     */

    private boolean checkServerUrl() {

        Object sel_obj = cmbHost.getModel().getSelectedItem();

        if (sel_obj != null) {

            String url = sel_obj.toString();

            List<String> suspi = getSuspiciousParameters(url);

            if (suspi != null && suspi.size() > 0) {

                if (userWantsToContinue(suspi)) {

                    // user says url ok anyway

                    return true;

                } else {

                    // user wants to fix url by hand

                    return false;

                }

            } else {

                // url is ok

                return true;

            }

        } else {

            // no selection in combo

            return false;

        }

    }

    /**

     * @param suspi

     * @return

     */

    private boolean userWantsToContinue(List<String> suspi) {

        String tit = PluginServices.getText(this, "server");

        String msg = PluginServices.getText(this, "Dangerous_parameters_found_Continue_question");

        int len = suspi.size();

        msg = msg + " '";

        for (int i=0; i<(len-1); i++) {

            msg = msg + suspi.get(i) + ", ";

        }

        msg = msg + suspi.get(len-1) + "'";

        int user_opt = JOptionPane.showConfirmDialog(

            thisWFSPanel,  msg, tit, JOptionPane.YES_NO_OPTION);

        return user_opt == JOptionPane.YES_OPTION;

    }

    /**

     * @param url

     * @return

     */

    private List<String> getSuspiciousParameters(String _url) {

        String str_url = _url;

        int len = SUSPICIOUS_PARAMS.length;

        String item = null;

        ArrayList<String> resp = new ArrayList<String>();

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

            item = SUSPICIOUS_PARAMS[i];

            item = "&" + item + "=";

            if (str_url.indexOf(item) != -1) {

                resp.add(SUSPICIOUS_PARAMS[i]);

            }

        }

        return resp;

    }

    public static String getLastMessage(Throwable ex) {

        Throwable p = ex;

        while (p.getCause() != null && p.getCause() != p) {

            p = p.getCause();

        }

        return p.getMessage();

    }

    private static final String[] SUSPICIOUS_PARAMS =

        { "request" }; // , ""}; 

}