Bug 135790 ClassCastException in RowData.
ClassCastException is thrown in RowData line 81(IBaseExpression expr = ( IBaseExpression ) valueExpressions.get( index - 1 );).
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/TableItemExecutor.java
}
				}
				if ( emitter != null )
				{
					emitter.endCell( cellContent );
				}
				finishTOCEntry( );
				context.popContent( );
			}
		}
		boolean closeRow = true;
		if ( closeRow )
		{
			emitter.endRow( ( IRowContent ) context.getContent( ) );
			finishTOCEntry( );
			context.popContent( );
			rowClosed = true;
		}
	}
	private void processRowType( RowDesign row, IRowContent rowContent )
	{
		assert row != null && rowContent instanceof RowContent;
		
		RowContent rCont = (RowContent)rowContent;
		rCont.setRowType( row.getBandType( ) );
		rCont.setGroupLevel( row.getGroupLevel( ) );
	}
	
	static List getValueExpressions( RowDesign row )
	{