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
return populateToList( iter, parameter, null);
	}
	private IResultIterator getResultSetForParameter(
			AbstractScalarParameterHandle parameter )
	{
		
		ModuleHandle report =  executionContext.getDesign( );
		DataSetHandle dataSet = report.findDataSet( parameter.getDataSetName( ) );
		IResultIterator iterator = null;
		if ( dataSet != null )
		{
			try
			{
				DataRequestSession dteSession = createDataSession( dataSet );
				dteSession.getDataSessionContext( )
						.setAppContext( getAppContext( ) );
				QueryDefinition queryDefn = createQueryDefinition( dataSet );
				ParameterHelper.addParameterBinding( queryDefn, parameter,
						dteSession.getModelAdaptor( ) );
				ParameterHelper.addParameterSortBy( queryDefn, parameter,
						dteSession.getModelAdaptor( ) );
				iterator = executeQuery( dteSession, queryDefn );
			}
			catch ( BirtException ex )
			{
				log.log( Level.WARNING, ex.getMessage( ), ex );
				executionContext.addException( dataSet, ex );
			}
		}
		return iterator;