Bug 148626 [Regression]Can't fetch value from the filter of table/chart which inherites data from container
Steps: 1. create a table and bind a dataset in it 2. create another table/chart in the table detail/table group header 3. switch to the Filter tab in property editor 4. create a filter and select value in "<select value...>" combo 5. an error popuped up, "The expression value can't be retrieved"
chart/org.eclipse.birt.chart.reportitem.ui/src/org/eclipse/birt/chart/reportitem/ui/ReportDataServiceProvider.java
ChartWizard.showException( e.getLocalizedMessage( ) );
				}
			}
			protected List getBindingList( DesignElementHandle inputElement )
			{
				Iterator iterator = getColumnDataBindings( itemHandle );
				List list = new ArrayList( );
				while ( iterator.hasNext( ) )
				{
					list.add( iterator.next( ) );
				}
				return list;
			}
			protected void setShellStyle( int newShellStyle )
			{
				super.setShellStyle( newShellStyle
						| SWT.DIALOG_TRIM | SWT.RESIZE | SWT.APPLICATION_MODAL );
			}
		};
		page.setInput( itemHandle );
		ExpressionProvider ep = new ExpressionProvider( itemHandle );
		ep.addFilter( new ExpressionFilter( ) {
			public boolean select( Object parentElement, Object element )
			{
				
				return !( parentElement.equals( ExpressionProvider.BIRT_OBJECTS )
						&& element instanceof IClassInfo && ( (IClassInfo) element ).getName( )
						.equals( "Total" ) ); 
			}
		} );