Bug 209128 BIRT Cross tab Model Change - Support for filter on measures
TO support filter condition on cross tab measure, Model changes are needed to support filter condition list on cross tab report item.
xtab/org.eclipse.birt.report.item.crosstab.core/src/org/eclipse/birt/report/item/crosstab/core/de/MeasureViewHandle.java
if ( aggregation != null )
		{
			logger
					.log(
							Level.INFO,
							Messages
									.getString( "MeasureViewHandle.info.aggregation.already.exist" ) ); 
			return aggregation;
		}
		ExtendedItemHandle aggregationCell = CrosstabExtendedItemFactory
				.createAggregationCell( moduleHandle );
		if ( aggregationCell != null )
		{
			CommandStack stack = getCommandStack( );
			stack.startTrans( Messages
					.getString( "MeasureViewHandle.msg.add.aggregation" ) ); 
			try
			{
				aggregationCell.setProperty(
						IAggregationCellConstants.AGGREGATION_ON_ROW_PROP,
						rowLevel );
				aggregationCell.setProperty(
						IAggregationCellConstants.AGGREGATION_ON_COLUMN_PROP,
						colLevel );
				getAggregationsProperty( ).add( aggregationCell );
			}
			catch ( SemanticException e )
			{
				stack.rollback( );
				throw e;