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
while ( iter.hasNext( ) )
				{
					Object parameter = iter.next( );
					if ( parameter instanceof ScalarParameterHandle )
					{
						ParameterHelper.addParameterBinding( queryDefn,
								(ScalarParameterHandle) parameter );
					}
				}
		
				DataRequestSession dteSession = createDataSession( dataSet );
				return executeQuery( dteSession, queryDefn );
			}
			catch ( BirtException ex )
			{
				log.log( Level.WARNING, ex.getMessage( ), ex );
				executionContext.addException( ex );
			}
		}
		return  null;
	}
	
	private CascadingParameterGroupHandle getCascadingParameterGroup(
			String name )
	{
		ReportDesignHandle report = (ReportDesignHandle) runnable
				.getDesignHandle( );
		return report.findCascadingParameterGroup( name );
	}
	static class SelectionChoice implements IParameterSelectionChoice