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/GetParameterDefinitionTask.java
{
				children = Collections.EMPTY_LIST;
			}
			else if ( cache.containsChildren( values, parameterIndex ) )
			{
				children = cache.getChildren( values, parameterIndex );
			}
			else
			{
				executionContext.setParameter( parameter.getName( ), value,
						choice.getLabel( ) );
				children = getSelectionTree( parameters, parameterHelpers, cache, values );
			}
			result = cache.getParent( values, parameterIndex );
			CascadingParameterSelectionChoice groupChoice = parameterHelpers[parameterIndex]
					.createCascadingParameterSelectionChoice( choice );
			result.add( groupChoice );
			groupChoice.setChildren( children );
		}
		return result;
	}
	private void close( IResultIterator resultIterator )
	{
		try
		{
			resultIterator.close( );
		}
		catch ( BirtException e )
		{
			e.printStackTrace();