Bug 211710 [Regression] Data of cascading parameters in the report extended from the library can not be selected from the drop-down list when preview [01]
Description: Data of cascading parameters in the report extended from the library can not be selected from the drop-down list when preview. Build number: 2.2.2.v20071203-0630 Steps to reproduce: 1. New a Library with cascading parameters. 2. New a report and extend the cascading parameters from the library and preview. Expected result: Values can be selected from the drop-down list. Actual result: Values can not be selected from the drop-down 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 );
		}