dbaccessfactory.java

来自「这是一个买卖系统,一个模拟的系统,根据下订单,看订单,买,等功能」· Java 代码 · 共 49 行

/**
 * @author  Michael Alexander Smith
 * @version 2.0
 */

package DBAccess;


/**
  * Manages the starting up of the database.
  * The database may be Access, mySQL etc.
  */

// Pattern: Abstract Factory
//          Fix to be 

public class DBAccessFactory
{
  static String theOS = getOSName();

  private static String getOSName()
  {
    String os = System.getProperties().getProperty( "os.name" );
    System.out.println("OS   = " + os );
    return os;
  }
  
  /**
   * Return an object to setup access to the database.
   */
  
  public DBAccess getNewDBAccess()
  {   
    if ( theOS.startsWith( "Windows" ) )
    {
      return new WindowsAccess();    // Access Windows
    }
    
    if ( theOS.startsWith( "Linux" ) )
    {
      return new LinuxAccess();      // MySQL linux
    }
    
    return new DBAccess();           // Unknown
  }

}