Application: gvSIG desktop » gvSIG data provider for WFS

/* 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.

 *

 */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.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.net.MalformedURLException;

import java.net.URL;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

import java.util.Properties;

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.apache.commons.io.IOUtils;

import org.apache.commons.lang3.BooleanUtils;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.gvsig.andami.PluginServices;

import org.gvsig.andami.PluginsLocator;

import org.gvsig.andami.PluginsManager;

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.WFSOpenStoreParameters;

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.dynobject.DynObject;

import org.gvsig.tools.exception.BaseException;

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

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

import org.gvsig.wfs.WFSClientExtension;

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

/**

 * <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 final Logger logger = LoggerFactory.getLogger(WFSWizard.class);

    private static final String serversPropsFilename = "servers.properties";

    private PluginServices plugin = null;

    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 explorer = null;

    private JCheckBox chkCaching = null;

    private DynObject preferences = null;

    private boolean refreshing = 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() {

        PluginsManager pluginsManager = PluginsLocator.getManager();

        this.plugin = pluginsManager.getPlugin(WFSClientExtension.class);

        this.preferences = this.plugin.getPluginProperties();

        this.refreshing = BooleanUtils.isTrue((Boolean) this.preferences.getDynValue("refresh_capabilities"));

        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, 140, 21);

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

        cacheFeatCombo = new JComboBox();

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

        cacheFeatCombo.setEnabled(false);

        cacheFeatCombo.setBounds(170, 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 = getServerDataPersistence();

        persistence.addServerData(new ServerData(host, ServerData.SERVER_TYPE_WFS));

    }

    /**

     * Fills up the initial WCSWizard controls.

     */

    private void rellenarControles() throws Exception {

        String url = "(unknow)";

        try {

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

            DataManager dataManager = DALLocator.getDataManager();

            // Create the server explorer parameters

            WFSServerExplorerParameters parameters

                    = (WFSServerExplorerParameters) dataManager

                    .createServerExplorerParameters(WFSServerExplorer.NAME);

            parameters.setUrl(url);

            parameters.setIgnoreCache(refreshing);

            addHost(url);

            // Create the server explorer

            explorer = (WFSServerExplorer) dataManager.openServerExplorer(

                    WFSServerExplorer.NAME, 

                    parameters

            );

            saveServerListFromComboBox();

            // Update the forms

            getLblTitle().setText(explorer.getTitle());

            getTxtAbstract().setText(explorer.getAbstract());

            List sel_ver = WFSProtocolHandlerFactory.getRequestableVersions(url,refreshing);

            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 (!explorer.getServerType().toLowerCase().startsWith("wfs 1.0")) {

                cacheFeatCombo.setEnabled(true);

            } else {

                cacheFeatCombo.setEnabled(false);

            }

            wfsParamsPanel.setServerExplorer(explorer);

            connected = true;

        } catch (Exception e) {

            logger.warn("Can't connect to '"+url+"'.",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);

            cmbHost.setServerList(getServerDataPersistence().getArrayOfServerData());

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

            // pressing the 'Enter' key

            cmbHost.getEditor().getEditorComponent()

                    .addKeyListener(new KeyAdapter() {

                        public void keyReleased(KeyEvent e) {

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

                                getBtnConnect().doClick();

                            }

                        }

                    });

        }

        return cmbHost;

    }

    /**

     * Gets the list of servers that have been persisted or added in the

     * properties file

     *

     * @return

     */

    private ServerDataPersistence getServerDataPersistence() {

        ServerDataPersistence servers = (ServerDataPersistence) this.preferences.getDynValue("servers");

        if (servers == null || servers.isEmpty()) {

            if (servers == null) {

                servers = new ServerDataPersistence(ServerData.SERVER_TYPE_WFS);

                this.preferences.setDynValue("servers", servers);

            }

            //Lee los servidores del properties y los mezcla con los que hay en la persistencia

            Properties prop = new Properties();

            File propFile = new File(this.plugin.getPluginDirectory(), serversPropsFilename);

            FileInputStream fis = null;

            try {

                fis = new FileInputStream(propFile);

                prop.load(fis);

            } catch (FileNotFoundException e) {

                logger.info("Properties file '" + propFile.getAbsolutePath() + "' not found", e);

            } catch (IOException e) {

                logger.info("Error reading properties file '" + propFile.getAbsolutePath() + "'.", e);

            } finally {

                IOUtils.closeQuietly(fis);

            }

            for (int i = 0; i < prop.size(); i++) {

                Object value = prop.get("server[" + i + "]");

                servers.addServerData(new ServerData(value.toString(), ServerData.SERVER_TYPE_WFS));

            }

        }

        return servers;

    }

    /**

     * Saves the list of server reading from the <code>ComboBox</code>

     */

    private void saveServerListFromComboBox() {

        ServerDataPersistence persistence = getServerDataPersistence();

        String urlSelected = getTxtHost().getModel().getSelectedItem().toString();

        boolean isSelectedInModel = false;

        for (int i = 0; i < getTxtHost().getItemCount(); i++) {

            String url = getTxtHost().getItemAt(i).toString();

            persistence.addServerData(new ServerData(url, ServerData.SERVER_TYPE_WFS));

            if (url.equals(urlSelected)) {

                isSelectedInModel = true;

            }

        }

        if (!isSelectedInModel) {

            persistence.addServerData(new ServerData(urlSelected, ServerData.SERVER_TYPE_WFS));

        }

    }

    /**

     * 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 explorer;

    }

    /**

     * 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();

        WFSOpenStoreParameters 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();

                    preferences.setDynValue("refresh_capabilities", new Boolean(refreshing));

                }

            });

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

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

                    refreshing = chkCaching.isSelected();

                    preferences.setDynValue("refresh_capabilities", new Boolean(refreshing));

                }

            });

        }

        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 (explorer != null) {

            explorer.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"}; // , ""};

}