kern/src/de/memtext/db/SampleApp.java

/*
 * Copyright (c) 2001-2004, 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 de.memtext.db;

import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;

public class SampleApp extends JFrame {
    private Connection con = null;
    private String path = ""; // null , "" or "." for current directory
    private String dbname = "testing";

    public SampleApp() throws ClassNotFoundException, SQLException, IOException {
        super("SampleApp");
        initDb();

        JLabel lbl = new JLabel("got a connection to "
                + con.getMetaData().getURL());
        this.getContentPane().add(lbl);
        this.setSize(600, 400);
        
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent we) {
                try {
                    String url=con.getMetaData().getURL();
                   Statement stmt= con.createStatement();
                    stmt.execute("shutdown");
                    stmt.close();
                    con.close();
                    //delete all temporary files that may exists
                    HsqlStandaloneMgr.deleteTmpFiles( url,path, dbname);
                } catch (SQLException e) {
                    e.printStackTrace();
                }
                System.exit(0);
            }
        });

    }

    private void initDb() throws ClassNotFoundException, SQLException,
            IOException {
      
        if (!HsqlStandaloneMgr.isDatabaseOpen(path, dbname)) {
            //if the database isn't open yet, we just open a regular connection
            //the system username is written to a special properties file
            con = HsqlStandaloneMgr.getConnection(path, dbname, "sa", "");
            Statement stmt = con.createStatement();
            stmt
                    .execute("drop table test if exists;create table test( col1 integer);insert into test values(1);checkpoint;");
            stmt.close();
        } else
        // the database is already open
        {
            //you can decide if the temporary copy should be read-only mode
            //if not, all changes to the database will be lost after closing
            // the connection
            boolean isReadOnlyModeWanted = true;
            int result = HsqlStandaloneMgr.askUser(this, path, dbname,
                    isReadOnlyModeWanted);
            if (result == JOptionPane.YES_OPTION) {
                con = HsqlStandaloneMgr.getTmpConnection(this, path, dbname,
                        "sa", "", isReadOnlyModeWanted);
            } else 
            {
//              opening of temp. copy not wanted
                System.exit(0);
            }
        }
    }

    public static void main(String args[]) {

        try {
            SampleApp app = new SampleApp();
            app.show();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}

//Created on 23.10.2004 at 12:10:38