Bug 210892 [Regression]The arguments of aggregation builder can not be modified
Description: [Regression]The arguments of aggregation builder can not be modified Build number: 2.3.0.v20071126-0800 Steps to reproduce: 1, New a table 2, Drag a aggregation builder into table 3, Specify the datafield, function to percentile and argument to 0.3 4, Reopen the aggregation and change the argument to 0.4 Expected result: After step4, the artument is changed to 0.4 Actual result: Nothing happened after step4, the argument is still 0.3 Error log:
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/BindingDialogHelper.java
List elementsList = DEUtil.getVisiableColumnBindingsList( this.bindingHolder );
		for ( Iterator iterator = elementsList.iterator( ); iterator.hasNext( ); )
		{
			ComputedColumnHandle binding = (ComputedColumnHandle) iterator.next( );
			if ( binding.getName( ).equals( name ) )
				return binding.getExpression( );
		}
		return null;
	}
	private List getFunctionArgNames( String function )
	{
		List argList = new ArrayList( );
		try
		{
			IAggregationInfo aggregationInfo = DataUtil.getAggregationFactory( )
					.getAggrInfo( function );
			Iterator argumentListIter = aggregationInfo.getParameters( )
					.iterator( );
			for ( ; argumentListIter.hasNext( ); )
			{
				IParameterInfo argInfo = (IParameterInfo) argumentListIter.next( );
				argList.add( argInfo.getDisplayName( ) );
			}
		}
		catch ( BirtException e )
		{
			ExceptionHandler.handle( e );
		}
		return argList;
	}