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
implements
			IGetParameterDefinitionTask
{
	private static final String VALUE_PREFIX = "__VALUE__";
	private static final String LABEL_PREFIX = "__LABEL__";
	
	
	
	
	protected Collection parameterDefns = null;
	protected HashMap dataCache = null;
	private List labelColumnBindingNames = null;
	/**
	 * @param engine
	 *            reference to the report engine
	 * @param runnable
	 *            the runnable report design
	 */
	public GetParameterDefinitionTask( IReportEngine engine,
			IReportRunnable runnable )
	{
		super( engine, runnable, IEngineTask.TASK_GETPARAMETERDEFINITION);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.api2.IGetParameterDefinitionTask#getParameterDefns(boolean)
	 */
	public Collection getParameterDefns( boolean includeParameterGroups )
	{