Bug 117450 Birt will hang when add several drivers through
Description: Add several drivers in the "Edit Data source" dialog, click "Ok" button, BIRT will hang and nothing can do except close BIRT forcibly. According to the developer's said, out of memory problem will occur when doing this operation. But why such operation cosumes so many memory? And the memory of my PC is 512M.
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/util/JdbcToolKit.java
{
	
	private static List jdbcDriverInfos = null;
	
	private static HashMap driverNameMap = null;
	
	private static final Class DriverClass = Driver.class;
	/**
	 * Resets cached jdbc driver list to null, force reget the infomation when
	 * required next time.
	 */
	public static void resetJdbcDriverNames( )
	{
		jdbcDriverInfos = null;
		driverNameMap = null;
	}
	 
	 /**
	  * Found drivers in the Jar file List
	  * @param file