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
prepareMetaData( );
		
		resultSetName = (String)mapDispNameToResultSetName.get( displayName );
		selectedColumns = null;
		currentResult = null;
	}
	
	public List getMetaData( ) throws EngineException
	{
		if ( resultMetaList == null )
		{
			resultMetaList = new ArrayList( );
			ResultMetaData metaData = null;
			if ( selectedColumns == null && instanceId != null )
			{
				currentResult = extract( );
				try
				{
					resultMetaList.add( currentResult.getResultMetaData( ) );
				}
				catch( BirtException be )
				{
					be.printStackTrace();
				}
			}
			
			if( selectedColumns == null )
			{
				return null;
			}