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
CascadingParameterGroupHandle parameterGroup = ( CascadingParameterGroupHandle ) handle;
		return parameterGroup;
	}
	private Collection getChoicesFromParameterQuery( ScalarParameterHandle parameter)
	{
		IResultIterator iter = getResultSetForParameter( parameter );
		if ( iter == null )
		{
			return Collections.EMPTY_LIST;
		}
		return populateToList( iter, parameter, null);
	}
	private IResultIterator getResultSetForParameter(
			ScalarParameterHandle parameter )
	{
		ReportDesignHandle report = (ReportDesignHandle) this.runnable
				.getDesignHandle( );
		DataSetHandle dataSet = report.findDataSet( parameter.getDataSetName( ) );
		IResultIterator iterator = null;
		if ( dataSet != null )
		{
			try
			{
				QueryDefinition queryDefn = createQueryDefinition( dataSet );
				ParameterHelper.addParameterBinding( queryDefn, parameter );
		
				DataRequestSession dteSession = createDataSession( dataSet );
				iterator = executeQuery( dteSession, queryDefn );
			}
			catch ( BirtException ex )