Bug 314631 Cann't get correct default values for parameters that with non-constant default value expressions
Steps to reproduce: 1. create a report with a scalar parameter that has non-constant default value expression such as BirtDateTime.today() 2. setup a project to get the default values of the parameter in BIRT runtime Eg. IReportEngine engine = createReportEngine( ); IRunnable runnable = engine.openReportDesign( REPORT_DESIGN ); IGetParamaterDefinitionTask task = engine.createGetParameterDefinitionTask( runnable ); HashMap result = task.getDefaultValues(); Expect result: The result map contains a parameter name and default value pair in which the default value is a Date instance of today. Actural result: The default value is null.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/GetParameterDefinitionTask.java
ValueGroup valueGroup = new ValueGroup( values, parameterIndex );
			Map cache = cachedLists[parameterIndex];
			return cache.containsKey( valueGroup );
		}
		
		public Collection getChildren( Object[] values, int parameterIndex )
		{
			if ( parameterIndex == parameterCount - 1 )
			{
				return Collections.EMPTY_LIST;
			}
			ValueGroup valueGroup = new ValueGroup( values, parameterIndex );
			Map cache = cachedLists[parameterIndex];
			Collection parent = (Collection)cache.get( valueGroup );
			if ( parent == null )
			{
				parent = parameterHelpers[parameterIndex + 1]
						.createSelectionCollection( );
				cache.put( valueGroup, parent );
			}
			return parent;
		}
		
		public Collection getRoot( )
		{
			return root;
		}
	}
	
	static class ValueGroup