Bug 123035 Serialize primitive types, hashmaps and other Java classes not using Java serialization method
If you take a look at the serialized engine output, we frequently see java classes appearing. I see String class; I see PageHint class; I see Hashmap classes. All of these should be gone so that BIRT document is independent of any Java-based class serialization. DtE team will move primitive type serialization to BIRT.CORE, see 123034. Engine can use that.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/DataExtractionTask.java
while( queryResultName == null && parId != null )
				{
					parId = parId.getParentID();
					if( parId != null )
						queryResultName = parId.getDataSetName();
				}
				assert queryResultName != null;
				
				IQueryResults parentQueryResult = dataEngine
						.getQueryResults( queryResultName );
				assert parentQueryResult != null;
				
				IResultIterator iter = parentQueryResult.getResultIterator( );
				long rowid = dataSetId.getRowID( );
				
				int i = 0;
				while ( iter.next( ) && i++ < rowid ) 		;
				
				IResultIterator subIter = iter.getSecondaryIterator( dataSetId
						.getQueryName( ), executionContext.getScope( ) );
				
				currentResult = new ExtractionResults( subIter, 
						selectedColumns, getValueExpressions ( rptItem.getQuery( ) ) );
				return currentResult;
			}
			catch( BirtException be )
			{
				be.printStackTrace( );
			}
		}