case DbType.ALL_TYPE: type = null;
case DbType.PROCEDURE_TYPE: type = DbType.PROCEDURE_STRING;
	private String  getSelectedDbType()	{				IStructuredSelection selection = (IStructuredSelection)filterComboViewer.getSelection();		String type = DbType.ALL_STRING;		if(selection != null && selection.getFirstElement() != null )		{			DbType dbType =  (DbType)selection.getFirstElement();						switch ( dbType.getType())			{				case DbType.TABLE_TYPE:					type = DbType.TABLE_STRING;					break;				case DbType.VIEW_TYPE:					type = DbType.VIEW_STRING;					break;				case DbType.ALL_TYPE:					type = null;					break;			}		}				return type;	}