Bug 196745 Data Engine implementation of BPS80- Result Set Sharing
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/CacheResultIterator.java
private ResultClass resultClass = null;
	private int rowCount;
	private int rowIndex;
	private int startingGroupLevel = -1;
	private int endingGroupLevel = -1;
	private List columnList = null;
	private Map columnValueMap = null;
	private int currRowIndex;
	private static Logger logger = Logger.getLogger( CacheResultIterator.class.getName( ) );
	/**
	 * 
	 * @param context
	 * @param queryResultID
	 * @throws DataException
	 */
	public CacheResultIterator( DataEngineContext context, String queryResultID )
			throws DataException
	{
		Object[] params = {
				context, queryResultID
		};
		logger.entering( CacheResultIterator.class.getName( ),
				"CacheResultIterator",
				params );
		
		this.context = context;
		this.queryResultID = queryResultID;
		this.columnValueMap = new HashMap( );
		this.currRowIndex = -1;
		try