Bug 210357 Can not get sorting key if xtab has a count aggregation binding[1102]
Description: Can not get sorting key if xtab has a count aggregation binding. The filter got the same issue. Build number: 2.3.0.v20071120-0800 Steps to reproduce: 1, New a Cube 2, New a crosstab using the cube 3, Add a aggregation binding on crosstab and select the function to COUNT, leave the datafield empty 4, after step3, goto sort page and add a sorting Expected result: User can get the sorting keys Actual result: The sorting key list is empty and the filter has the same issue
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/olap/util/OlapExpressionCompiler.java
return getReferencedScriptObject( ( (IScriptExpression) expr ),
					objectName );
		}
		else if ( expr instanceof IConditionalExpression )
		{
			String dimName = null;
			IScriptExpression expr1 = ( (IConditionalExpression) expr ).getExpression( );
			dimName = getReferencedScriptObject( expr1, objectName );
			if ( dimName != null )
				return dimName;
			IBaseExpression op1 = ( (IConditionalExpression) expr ).getOperand1( );
			dimName = getReferencedScriptObject( op1, objectName );
			if ( dimName != null )
				return dimName;
			IBaseExpression op2 = ( (IConditionalExpression) expr ).getOperand2( );
			dimName = getReferencedScriptObject( op2, objectName );
			return dimName;
		}
		return null;
	}
	/**
	 * 
	 * @param expr
	 * @param objectName
	 * @return
	 */
	private static String getReferencedScriptObject( IScriptExpression expr,
			String objectName )
	{
		if ( expr == null )