Bug 202038 errors occurred when preview the attached design file.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/executor/transform/pass/ResultSetProcessUtil.java
*  Actuate Corporation  - initial API and implementation
 *******************************************************************************/
package org.eclipse.birt.data.engine.executor.transform.pass;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.birt.data.engine.core.DataException;
import org.eclipse.birt.data.engine.executor.ResultClass;
import org.eclipse.birt.data.engine.executor.ResultFieldMetadata;
import org.eclipse.birt.data.engine.executor.aggregation.AggrDefnRoundManager;
import org.eclipse.birt.data.engine.executor.aggregation.AggregationHelper;
import org.eclipse.birt.data.engine.executor.transform.IExpressionProcessor;
import org.eclipse.birt.data.engine.executor.transform.OdiResultSetWrapper;
import org.eclipse.birt.data.engine.executor.transform.ResultSetPopulator;
import org.eclipse.birt.data.engine.executor.transform.TransformationConstants;
import org.eclipse.birt.data.engine.impl.ComputedColumnHelper;
import org.eclipse.birt.data.engine.impl.DataEngineSession;
import org.eclipse.birt.data.engine.impl.FilterByRow;
import org.eclipse.birt.data.engine.odi.IResultClass;
/**
 * The class used to process ResultSet data.
 * 
 */
class ResultSetProcessUtil extends RowProcessUtil
{
	/**
	 * 
	 */
	private List cachedSort;
	private boolean groupingDone;
	/**