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
{
			resultMetaList.clear();
		}
		
		if ( queryResultName != null )
		{
			try
			{
				IQueryResults queryResults = dataEngine.getQueryResults( queryResultName );
				
				assert queryResults.getResultIterator() != null;
				
				currentResult = new ExtractionResults( queryResults.getResultIterator() 
						, selectedColumns, getValueExpressions( rptItem.getQuery( ) ) );
				return currentResult;
				
			}
			catch ( BirtException e )
			{
				e.printStackTrace();
			}
		}
		else
		{
			DataSetID parentId = dataSetId.getParentID( );
			assert parentId != null;
			try
			{
				queryResultName = parentId.getDataSetName( );
				DataSetID parId = parentId;