Bug 121687 Exception throws when export data in table which inside a grid cell.
Description: Exception throws when export data in table which inside a grid cell. Steps to reproduce: 1. insert a grid. 2. insert one table to one grid cell. 3. insert another table to the other grid cell. 4. export data in two tables. Expected result: Data are exported. Actual result: Exception in: ReportEngineService.getMetaData( )
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/parser/EngineIRVisitor.java
return new DimensionType( handle.getStringValue( ) );
		}
		
		double measure = handle.getMeasure( );
		String unit = handle.getUnits( );
		if ( DimensionValue.DEFAULT_UNIT.equals( unit ) )
		{
			unit = defaultUnit;
		}
		return new DimensionType( measure, unit );
	}
	protected void setupListingItem( ListingDesign listing, ListingHandle handle )
	{
		
		setupReportItem( listing, handle );
		listing.setPageBreakInterval( handle.getPageBreakInterval( ) );
		
		
		
		
	}
	
	protected int toDteFilterOperator( String modelOpr )
	{
		if ( modelOpr.equals( DesignChoiceConstants.FILTER_OPERATOR_EQ ) )
			return IConditionalExpression.OP_EQ;
		if ( modelOpr.equals( DesignChoiceConstants.FILTER_OPERATOR_NE ) )
			return IConditionalExpression.OP_NE;
		if ( modelOpr.equals( DesignChoiceConstants.FILTER_OPERATOR_LT ) )
			return IConditionalExpression.OP_LT;