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A full SQL database system with JDBC driver that can be embedded in a Java application or operate as a stand-alone server with clients connecting via TCP/IP.
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/**
 * com.mckoi.database.GTProductDataSource  23 Mar 2002
 *
 * Mckoi SQL Database ( http://www.mckoi.com/database )
 * Copyright (C) 2000, 2001, 2002  Diehl and Associates, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * Version 2 as published by the Free Software Foundation.
 *
 * 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 Version 2 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * Version 2 along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * Change Log:
 * 
 * 
 */

package com.mckoi.database;

import java.util.ArrayList;
import com.mckoi.database.global.StandardMessages;

/**
 * An implementation of MutableTableDataSource that models information about
 * the software.
 * 
 * NOTE: This is not designed to be a long kept object.  It must not last
 *   beyond the lifetime of a transaction.
 *
 * @author Tobias Downer
 */

final class GTProductDataSource extends GTDataSource {

  /**
   * The list of info keys/values in this object.
   */
  private ArrayList key_value_pairs;

  /**
   * Constructor.
   */
  public GTProductDataSource(Transaction transaction) {
    super(transaction.getSystem());
    this.key_value_pairs = new ArrayList();
  }

  /**
   * Initialize the data source.
   */
  public GTProductDataSource init() {

    // Set up the product variables.
    key_value_pairs.add("name");
    key_value_pairs.add(StandardMessages.NAME);

    key_value_pairs.add("version");
    key_value_pairs.add(StandardMessages.VERSION);

    key_value_pairs.add("copyright");
    key_value_pairs.add(StandardMessages.COPYRIGHT);

    return this;
  }

  // ---------- Implemented from GTDataSource ----------

  public DataTableDef getDataTableDef() {
    return DEF_DATA_TABLE_DEF;
  }

  public int getRowCount() {
    return key_value_pairs.size() / 2;
  }

  public TObject getCellContents(final int column, final int row) {
    switch (column) {
      case 0:  // var
        return columnValue(column, (String) key_value_pairs.get(row * 2));
      case 1:  // value
        return columnValue(column,
                           (String) key_value_pairs.get((row * 2) + 1));
      default:
        throw new Error("Column out of bounds.");
    }
  }

  // ---------- Overwritten from GTDataSource ----------

  public void dispose() {
    super.dispose();
    key_value_pairs = null;
  }

  // ---------- Static ----------

  /**
   * The data table def that describes this table of data source.
   */
  static final DataTableDef DEF_DATA_TABLE_DEF;

  static {

    DataTableDef def = new DataTableDef();
    def.setTableName(
             new TableName(Database.SYSTEM_SCHEMA, "sUSRProductInfo"));

    // Add column definitions
    def.addColumn(stringColumn("var"));
    def.addColumn(stringColumn("value"));

    // Set to immutable
    def.setImmutable();

    DEF_DATA_TABLE_DEF = def;

  }

}