Bug 189534 Computed Column aggregation builder doesn't accept argument.
The aggregation builder of computed column should be enhanced so that 1. It can accept aggregation argument. 2. Only when the selected computed column can accept argument should the argument dialog enabled.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/executor/transform/pass/DataSetProcessUtil.java
import java.util.ArrayList;
import java.util.List;
import org.eclipse.birt.data.engine.aggregation.AggregationFactory;
import org.eclipse.birt.data.engine.api.IBaseExpression;
import org.eclipse.birt.data.engine.api.aggregation.IAggregation;
import org.eclipse.birt.data.engine.api.querydefn.ComputedColumn;
import org.eclipse.birt.data.engine.core.DataException;
import org.eclipse.birt.data.engine.executor.aggregation.AggrDefnManager;
import org.eclipse.birt.data.engine.executor.aggregation.AggrInfo;
import org.eclipse.birt.data.engine.executor.aggregation.AggregationHelper;
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.expression.ExpressionCompiler;
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.IAggrInfo;
import org.mozilla.javascript.Context;
/**
 * The class used to populate DataSet data.
 * 
 */
class DataSetProcessUtil extends RowProcessUtil
{
	/**
	 * 
	 * @param populator
	 * @param iccState
	 * @param computedColumnHelper