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
{
				Object value = iterator.getValue( valueColumnNames[i] );
				value = convertToType( value, valueTypes[i] );
				if ( ( value == null && keyValues[i] != null )
						|| ( value != null && !value.equals( keyValues[i] ) ) )
				{
					return false;
				}
			}
			return true;
		}
	}
	
	private IResultIterator getResultSetOfCascadingGroup(
			CascadingParameterGroupHandle parameterGroup )
	{
		if ( parameterGroup == null )
			return null;
		
		
		
		DataSetHandle dataSet = parameterGroup.getDataSet( );
		if ( dataSet != null )
		{
			try
			{
				
				QueryDefinition queryDefn = createQueryDefinition( dataSet );
		
				Iterator iter = parameterGroup.getParameters( ).iterator( );