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
}
		}
		return ret;
	}
	public SlotHandle getParameters( )
	{
		ReportDesignHandle report = (ReportDesignHandle) runnable
				.getDesignHandle( );
		return report.getParameters( );
	}
	public ParameterHandle getParameter( String name )
	{
		ReportDesignHandle report = (ReportDesignHandle) runnable
				.getDesignHandle( );
		return report.findParameter( name );
	}
	public HashMap getDefaultValues( )
	{
		
		usingParameterValues( );
		final HashMap values = new HashMap( );
		
		new ParameterVisitor( ) {
			boolean visitScalarParameter( ScalarParameterHandle param,
					Object userData )
			{
				String name = param.getName( );
				String expr = param.getDefaultValue( );
				String type = param.getDataType( );
				Object value = convertToType( expr, type );