Bug 182680 Use feature of new Aggregation framework of Data Engine.
DataEngine will implement new aggregation framework in 2.2.0RC0. After the implementation is finished Engine should go ahead to use new column bindings in definition of map/highlight.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/LogUtil.java
StringBuffer stringBuffer= new StringBuffer("ConditionalExpression("); 
		ConditionalExpression conditionalExpression = (ConditionalExpression)source;
		stringBuffer.append( "Operator : "+conditionalExpression.getOperator()+", " );
		stringBuffer.append( "Expression : "+toString(conditionalExpression.getExpression())+", " );
		if ( !isEmpty(conditionalExpression.getOperand1( )) )
			stringBuffer.append( "Operand1 : "+toString(conditionalExpression.getOperand1())+", " );
		
		if ( !isEmpty(conditionalExpression.getOperand2( )))
			stringBuffer.append( "Operand2 : "+toString(conditionalExpression.getOperand2())+")" );
		
		return stringBuffer.toString( );
	}
	
	private static String toString_ScriptExpression(Object source){
		return "ScriptExpression(Text:"+((ScriptExpression)source).getText()+")";
	}
	
	private static String toString_InputParameterBinding( Object source )
	{
		InputParameterBinding inputParameterBinding =(InputParameterBinding)source;
		StringBuffer stringBuffer = new StringBuffer( "InputParameterBinding(" );
		if ( !isEmpty(inputParameterBinding.getName()))
			stringBuffer.append( "Name : " +inputParameterBinding.getName()+", " );
		
		stringBuffer.append( "Position : " +inputParameterBinding.getPosition()+", " );
		stringBuffer.append( "Expression : " + toString(inputParameterBinding.getExpr()) );
		stringBuffer.append( ")" );
		return stringBuffer.toString( );
	}
	private static String toString_SortDefinition(Object source){