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
{
		Object[] keyValues;
		String[] valueColumnNames;
		String[] valueTypes;
		
		public ParameterGroupFilter( Object[] keyValues,
				CascadingParameterGroupHandle parameterGroup )
		{
			this.keyValues = keyValues;
			valueColumnNames = new String[keyValues.length];
			valueTypes = new String[keyValues.length];
			SlotHandle parameterSlots = parameterGroup.getParameters( );
			for ( int i = 0; i < keyValues.length; i++ )
			{
				ScalarParameterHandle tempParameter = (ScalarParameterHandle) parameterSlots
						.get( i );
				valueColumnNames[i] = ParameterHelper.getValueColumnName( tempParameter );
				valueTypes[i] = tempParameter.getDataType( );
			}
		}
		
		public boolean accept( IResultIterator iterator ) throws BirtException
		{
			for ( int i = 0; i < valueColumnNames.length; i++ )
			{
				Object value = iterator.getValue( valueColumnNames[i] );