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
{
		private Object[] values;
		private int parameterIndex;
		
		public ValueGroup( Object[] values, int parameterIndex )
		{
			this.values = values;
			this.parameterIndex = parameterIndex;
		}
		
		public int hashCode( )
		{
			int hashCode = 0;
			for ( int i = 0; i <= parameterIndex; i++ ){
				hashCode += 13 * values[i].hashCode( );
			}
			return hashCode;
		}
		
		public boolean equals( Object obj )
		{
			if ( obj == this )
			{
				return true;
			}
			if ( !(obj instanceof ValueGroup ) )
			{
				return false;
			}