Bug 209450 [regression]Duplicate values display in Cascading parameter list[0705]
Descripption: Duplicate values display in Cascading parameter list Build number:2.3.0.v20071112 Steps to reproduce: 1. New sample data source and dataset from CUSTOMERS. 2. New a cascading parameter from COUNTRY, STATE AND CITY fields. 3. Preview. Expected result: Values in three parameter list aren't duplicated. Actual result: Duplicate values show in parameter list. Error log:n/a
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/ParameterHelper.java
{
		private boolean distinct;
		
		private FixInOrderComparator(boolean distinct )
		{
			this.distinct = distinct;
		}
		
		public int compare( Object arg0, Object arg1 )
		{
			if ( distinct )
			{
				if ( arg0 == null )
				{
					if ( arg0 == null )
						return 0;
				}
				else
				{
					if ( arg0.equals( arg1 ) )
						return 0;
				}
			}
			return 1;
		}
	};
	
	public ParameterHelper( ScalarParameterHandle parameter, Locale locale )