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/dialogs/JdbcDriverManagerDialog.java
ti.setText( 1, c1 );
			ti.setText( 2, c2 );
		}
	}
	
	/**
	 * check if the jar exist in the oda driver directory or exist in the disk.
	 * x - not exist in the oda dirctory. <br>* - not exist in the disk.
	 */
	private void checkJarState( )
	{
		for ( Iterator itr = jarMap.values( ).iterator( ); itr.hasNext( ); )
		{
			JarFile jarInfo = (JarFile) itr.next( );
			jarInfo.checkJarState();
		}
	}
	
	/**
	 * update driverMap
	 */
	private void updateDriverMap( )
	{
		
		List driverList = JdbcToolKit.getJdbcDriversFromODADir( OdaJdbcDriver.Constants.DATA_SOURCE_ID );
		
		
		List fileList = new ArrayList( );
		Iterator jarsCopyIterator = jarsToBeCopied.values().iterator();
		while(jarsCopyIterator.hasNext())