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
i--;
		return i;
	}
	/**
	 * This method is used to provide information necessary for next step parsing.
	 * 
	 * @param chars
	 * @param i
	 * @param omitNextQuote
	 * @param candidateKey1
	 * @param candidateKey2
	 * @return
	 */
	private static ParseIndicator getParseIndicator( char[] chars, int i,
			boolean omitNextQuote, boolean candidateKey1, boolean candidateKey2 )
	{
		int retrieveSize = 0;
		if ( chars[i] == '/' )
		{
			if ( i > 0 && chars[i - 1] == '/' )
			{
				retrieveSize++;
				while ( i < chars.length - 2 )
				{
					i++;
					retrieveSize++;
					if ( chars[i] == '\n' )
					{
						break;
					}