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
}
	}
	private Collection populateToSelectionTree( IResultIterator iterator,
			CascadingParameterGroupHandle parameterGroup )
	{
		assert iterator != null;
		ParameterHelper[] parameterHelpers = getParameterHelpers( parameterGroup );
		ChoiceListCache cache = new ChoiceListCache( parameterHelpers );
		int parameterCount = parameterHelpers.length;
		try
		{
			while ( iterator.next( ) )
			{
				Object[] values = new Object[parameterCount];
				for ( int i = 0; i < parameterCount; i++ )
				{
					ParameterHelper parameterHelper = parameterHelpers[i];
					CascadingParameterSelectionChoice choice = parameterHelper
							.createCascadingParameterSelectionChoice( iterator );
					values[i] = choice.getValue( );
					cache.getParent( values, i ).add( choice );
					choice.setChildren( cache.getChildren( values, i ) );
				}
			}
		}
		catch ( BirtException ex )
		{
			log.log( Level.WARNING, ex.getMessage( ), ex );
			executionContext.addException( ex );
		}