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
ReportItemDesign reportItem = (ReportItemDesign) mapQueryToReportItem
					.get(query);
			String displayName = null;
			if (reportItem.getName() != null) {
				displayName = reportItem.getName() + "_" + counter;
			} else {
				displayName = "ELEMENT_" + reportItem.getID() + "_" + counter;
			}
			counter++;
			
			this.mapQueryToDispName.put( query, displayName );
			
			Iterator resultSetIter = resultSetList.iterator();
			while (resultSetIter.hasNext()) {
				String resultSetName = (String) resultSetIter.next();
				mapDispNameToResultSetName.put(displayName, resultSetName);
				this.mapResultSetNameToQuery.put( resultSetName, query );
			}
		}
		
		isMetaDataPrepared = true;
	}
	
	/*
	 * load map from query id to result set id from report document.
	 */
	private void loadResultSetMetaData( ) throws EngineException
	{
		IDocArchiveReader reader = reportDocReader.getArchive( );
		try