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
{
		try
		{
			switchToOsgiClassLoader( );
			return doGetSelectionList( name );
		}
		finally
		{
			switchClassLoaderBack( );
		}
	}
	private Collection doGetSelectionList( String name )
	{
		usingParameterValues( );
		ModuleHandle design =  executionContext.getDesign( );
		AbstractScalarParameterHandle parameter = (AbstractScalarParameterHandle) design
				.findParameter( name );
		if ( parameter == null )
		{
			executionContext.addException( new EngineException(
					MessageConstants.PARAMETER_ISNOT_FOUND_BY_NAME_EXCEPTION,
					name ) );
			return Collections.EMPTY_LIST;
		}
		String selectionType = parameter.getValueType( );
		String dataType = parameter.getDataType( );
		if ( DesignChoiceConstants.PARAM_VALUE_TYPE_DYNAMIC
				.equals( selectionType ) )
		{
			CascadingParameterGroupHandle group = null;