HSQLDB example source code file (ConnectionDialog.java)

This example HSQLDB source code file (ConnectionDialog.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - HSQLDB tags/keywords

awt, button, connectiondialog, east, event, gridlayout, gridlayout, jdbc, label, panel, panel, south, sql, string, string, textfield, textfield, util, west

The HSQLDB ConnectionDialog.java source code

/* Copyright (c) 2001-2008, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


package org.hsqldb.util;

import java.sql.Connection;
import java.sql.DriverManager;
import java.util.Enumeration;
import java.util.Hashtable;
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Choice;
import java.awt.Component;
import java.awt.Dialog;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.Label;
import java.awt.Panel;
import java.awt.SystemColor;
import java.awt.TextField;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

// sqlbob@users 20020325 - patch 1.7.0 - enhancements
// sqlbob@users 20020407 - patch 1.7.0 - reengineering
// fredt@users - 20040508 - modified patch by lonbinder@users for saving settings

/**
 * Opens a connection to a database
 *
 * @author Thomas Mueller (Hypersonic SQL Group)
 * @version 1.7.2
 * @since Hypersonic SQL
 */
class ConnectionDialog extends Dialog implements ActionListener, ItemListener {

    protected Connection mConnection;
    protected TextField  mName, mDriver, mURL, mUser, mPassword;
    protected Label      mError;
    private String[][]   connTypes;
    private Hashtable    settings;
    private Choice       types, recent;

    /**
     * @throws Exception
     */
    public static Connection createConnection(String driver, String url,
            String user, String password) throws Exception {

        Class.forName(driver).newInstance();

        return DriverManager.getConnection(url, user, password);
    }

    /**
     * Constructor declaration
     *
     *
     * @param owner
     * @param title
     */
    ConnectionDialog(Frame owner, String title) {
        super(owner, title, true);
    }

    private void create() {

        Dimension d = Toolkit.getDefaultToolkit().getScreenSize();

        setLayout(new BorderLayout());

        Panel p = new Panel(new BorderLayout());
        Panel pLabel;
        Panel pText;
        Panel pButton;
        Panel pClearButton;

        // (ulrivo): full size on screen with less than 640 width
        if (d.width >= 640) {
            pLabel       = new Panel(new GridLayout(8, 1, 10, 10));
            pText        = new Panel(new GridLayout(8, 1, 10, 10));
            pButton      = new Panel(new GridLayout(1, 2, 10, 10));
            pClearButton = new Panel(new GridLayout(8, 1, 10, 10));
        } else {
            pLabel       = new Panel(new GridLayout(8, 1));
            pText        = new Panel(new GridLayout(8, 1));
            pButton      = new Panel(new GridLayout(1, 2));
            pClearButton = new Panel(new GridLayout(8, 1));
        }

        p.add("West", pLabel);
        p.add("Center", pText);
        p.add("South", pButton);
        p.add("North", createLabel(""));
        p.add("East", pClearButton);
        p.setBackground(SystemColor.control);
        pText.setBackground(SystemColor.control);
        pLabel.setBackground(SystemColor.control);
        pButton.setBackground(SystemColor.control);
        pLabel.add(createLabel("Recent:"));

        recent = new Choice();

        try {
            settings = ConnectionDialogCommon.loadRecentConnectionSettings();
        } catch (java.io.IOException ioe) {
            ioe.printStackTrace();
        }

        recent.add(ConnectionDialogCommon.emptySettingName);

        Enumeration en = settings.elements();

        while (en.hasMoreElements()) {
            recent.add(((ConnectionSetting) en.nextElement()).getName());
        }

        recent.addItemListener(new ItemListener() {

            public void itemStateChanged(ItemEvent e) {

                String s = (String) e.getItem();
                ConnectionSetting setting =
                    (ConnectionSetting) settings.get(s);

                if (setting != null) {
                    mName.setText(setting.getName());
                    mDriver.setText(setting.getDriver());
                    mURL.setText(setting.getUrl());
                    mUser.setText(setting.getUser());
                    mPassword.setText(setting.getPassword());
                }
            }
        });
        pText.add(recent);

        Button b;

        b = new Button("Clr");

        b.setActionCommand("Clear");
        b.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {

                ConnectionDialogCommon.deleteRecentConnectionSettings();

                settings = new Hashtable();

                recent.removeAll();
                recent.add(ConnectionDialogCommon.emptySettingName);
                mName.setText(null);
            }
        });
        pClearButton.add(b);
        pLabel.add(createLabel("Setting Name:"));

        mName = new TextField("");

        pText.add(mName);
        pLabel.add(createLabel("Type:"));

        types     = new Choice();
        connTypes = ConnectionDialogCommon.getTypes();

        for (int i = 0; i < connTypes.length; i++) {
            types.add(connTypes[i][0]);
        }

        types.addItemListener(this);
        pText.add(types);
        pLabel.add(createLabel("Driver:"));

        mDriver = new TextField(connTypes[0][1]);

        pText.add(mDriver);
        pLabel.add(createLabel("URL:"));

        mURL = new TextField(connTypes[0][2]);

        mURL.addActionListener(this);
        pText.add(mURL);
        pLabel.add(createLabel("User:"));

        mUser = new TextField("SA");

        mUser.addActionListener(this);
        pText.add(mUser);
        pLabel.add(createLabel("Password:"));

        mPassword = new TextField("");

        mPassword.addActionListener(this);
        mPassword.setEchoChar('*');
        pText.add(mPassword);

        b = new Button("Ok");

        b.setActionCommand("ConnectOk");
        b.addActionListener(this);
        pButton.add(b);

        b = new Button("Cancel");

        b.setActionCommand("ConnectCancel");
        b.addActionListener(this);
        pButton.add(b);
        add("East", createLabel(""));
        add("West", createLabel(""));

        mError = new Label("");

        Panel pMessage = createBorderPanel(mError);

        add("South", pMessage);
        add("North", createLabel(""));
        add("Center", p);
        doLayout();
        pack();

        Dimension size = getSize();

        // (ulrivo): full size on screen with less than 640 width
        if (d.width >= 640) {
            setLocation((d.width - size.width) / 2,
                        (d.height - size.height) / 2);
        } else {
            setLocation(0, 0);
            setSize(d);
        }

        show();
    }

    public static Connection createConnection(Frame owner, String title) {

        ConnectionDialog dialog = new ConnectionDialog(owner, title);

        dialog.create();

        return dialog.mConnection;
    }

    protected static Label createLabel(String s) {

        Label l = new Label(s);

        l.setBackground(SystemColor.control);

        return l;
    }

    protected static Panel createBorderPanel(Component center) {

        Panel p = new Panel();

        p.setBackground(SystemColor.control);
        p.setLayout(new BorderLayout());
        p.add("Center", center);
        p.add("North", createLabel(""));
        p.add("South", createLabel(""));
        p.add("East", createLabel(""));
        p.add("West", createLabel(""));
        p.setBackground(SystemColor.control);

        return p;
    }

    public void actionPerformed(ActionEvent ev) {

        String s = ev.getActionCommand();

        if (s.equals("ConnectOk") || (ev.getSource() instanceof TextField)) {
            try {
                if (mURL.getText().indexOf('\u00AB') >= 0) {
                    throw new Exception("please specify db path");
                }

                mConnection = createConnection(mDriver.getText(),
                                               mURL.getText(),
                                               mUser.getText(),
                                               mPassword.getText());

                if (mName.getText() != null
                        && mName.getText().trim().length() != 0) {
                    ConnectionSetting newSetting =
                        new ConnectionSetting(mName.getText(),
                                              mDriver.getText(),
                                              mURL.getText(), mUser.getText(),
                                              mPassword.getText());

                    ConnectionDialogCommon.addToRecentConnectionSettings(
                        settings, newSetting);
                }

                dispose();
            } catch (java.io.IOException ioe) {
                dispose();
            } catch (Exception e) {
                e.printStackTrace();
                mError.setText(e.toString());
            }
        } else if (s.equals("ConnectCancel")) {
            dispose();
        }
    }

    public void itemStateChanged(ItemEvent e) {

        String s = (String) e.getItem();

        for (int i = 0; i < connTypes.length; i++) {
            if (s.equals(connTypes[i][0])) {
                mDriver.setText(connTypes[i][1]);
                mURL.setText(connTypes[i][2]);
            }
        }
    }
}