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
{
		assert isCascadingParameter( parameter );
		CascadingParameterGroupHandle parameterGroup = getCascadingGroup( parameter );
		SlotHandle parameters = parameterGroup.getParameters( );
		List values = new ArrayList( );
		for ( int i = 0; i < parameters.getCount( ); i++ )
		{
			ScalarParameterHandle tempParameter = ( ScalarParameterHandle ) parameters.get( i );
			if ( tempParameter == parameter )
			{
				break;
			}
			values.add( getParameterValue( tempParameter.getName( ) ) );
		}
		return values.toArray( );
	}
	private CascadingParameterGroupHandle getCascadingGroup( ParameterHandle parameter )
	{
		DesignElementHandle handle = parameter.getContainer( );
		assert handle instanceof CascadingParameterGroupHandle;
		CascadingParameterGroupHandle parameterGroup = ( CascadingParameterGroupHandle ) handle;
		return parameterGroup;
	}
	private Collection getChoicesFromParameterQuery( AbstractScalarParameterHandle parameter)
	{
		IResultIterator iter = getResultSetForParameter( parameter );
		if ( iter == null )
		{
			return Collections.EMPTY_LIST;
		}