Bug 214196 [Automation][Compatibility]Exception occurs when preview a old crosstab with measure sorting
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/DataEngineImpl.java
{
	
	private HashMap					dataSources = new HashMap();
	
	
	private HashMap					dataSetDesigns = new HashMap();
	
	
	private Scriptable				dataSourcesJSObject;
	
	private DataEngineContext context;
	private DataEngineSession session;