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
if ( obj == this )
			{
				return true;
			}
			if ( !(obj instanceof CascadingParameterSelectionChoice ) )
			{
				return false;
			}
			CascadingParameterSelectionChoice choice = (CascadingParameterSelectionChoice)obj;
			if ( value == null )
			{
				return choice.value == null;
			}
			return value.equals( choice.value );
		}
	}
	
	static class ChoiceListCache
	{
		private ParameterHelper[] parameterHelpers;
		private Map[] cachedLists;
		private Collection root;
		private int parameterCount;
		
		public ChoiceListCache( ParameterHelper[] parameterHelpers )
		{
			this.parameterHelpers = parameterHelpers;
			this.parameterCount = parameterHelpers.length;
			cachedLists = new Map[parameterCount - 1];
			for ( int i = 0; i < cachedLists.length; i++ )