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 = (ValueGroup)obj;
			if ( parameterIndex != valueGroup.parameterIndex )
			{
				return false;
			}
			for ( int i = 0; i <= parameterIndex; i++ )
			{
				if ( !(equal(values[i], valueGroup.values[i])))
				{
					return false;
				}
			}
			return true;
		}
		
		private boolean equal(Object obj1, Object obj2 )
		{
			if ( obj1 == null )
			{
				return obj2 == null;
			}
			return obj1.equals( obj2 );
		}
	}
	
	private boolean isCascadingParameter( ParameterHandle parameter )
	{
		return parameter.getContainer( ) instanceof CascadingParameterGroupHandle;
	}
	private Object[] getParameterValuesAhead( ParameterHandle parameter )