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.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/adapter/ExpressionUtil.java
this.omitNextQuote = omitNextQuote;
		this.candidateKey1 = candidateKey1;
		this.candidateKey2 = candidateKey2;
	}
	public int getRetrieveSize( )
	{
		return this.retrieveSize;
	}
	public int getNewIndex( )
	{
		return this.newIndex;
	}
	public boolean isCandidateKey( )
	{
		return this.isCandidateKey;
	}
	public boolean omitNextQuote( )
	{
		return this.omitNextQuote;
	}
	public boolean getCandidateKey1( )
	{
		return this.candidateKey1;
	}
	public boolean getCandidateKey2( )
	{
		return this.candidateKey2;
	}
}
class ColumnBinding implements IColumnBinding