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
{
				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();