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/api/impl/GetParameterDefinitionTask.java
values.put( name, value );
				return true;
			}
			boolean visitParameterGroup( ParameterGroupHandle group,
					Object userData )
			{
				return visitParametersInGroup( group, userData );
			}
		}.visit( (ReportDesignHandle) runnable.getDesignHandle( ) );
		return values;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.api.IGetParameterDefinitionTask#getDefaultParameter(java.lang.String)
	 */
	public Object getDefaultValue( IParameterDefnBase param )
	{
		return ( param == null ) ? null : getDefaultValue( param.getName( ) );
	}
	public Object getDefaultValue( String name )
	{
		ReportDesignHandle report = (ReportDesignHandle) runnable
				.getDesignHandle( );
		ScalarParameterHandle parameter = (ScalarParameterHandle) report
				.findParameter( name );
		if ( parameter == null )
		{
			return null;
		}