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/data/dte/AbstractDataEngine.java
ISubqueryDefinition subQuery = ( ISubqueryDefinition ) query;
			String subQueryName = subQuery.getName( );
			IResultIterator parentRI = parent.getResultIterator( );
			IResultIterator ri = parentRI.getSecondaryIterator( subQueryName,
					context.getSharedScope( ) );
			assert ri != null;
			resultSet = new DteResultSet( parent, subQueryName, ri, this,
					context );
			queryResultStack.addLast( resultSet );
			return resultSet;
		} catch ( BirtException e )
		{
			logger.log( Level.SEVERE, e.getMessage( ), e );
			context.addException( e );
			return null;
		}
	}
	abstract public void close( );
	abstract public void shutdown( );
	public Object evaluate( IBaseExpression expr )
	{
		if ( expr == null )
		{
			return null;
		}
		
		if ( expr.getHandle( ) != null && !queryResultStack.isEmpty( ) )
		{
			try
			{