Object value = null;
if (createDesc.getAssignment() != null)
{
// Evaluate assignment expression
StreamTypeService typeService = new StreamTypeServiceImpl(new EventType[0], new String[0], new boolean[0], services.getEngineURI(), false);
ExprEvaluatorContextStatement evaluatorContextStmt = new ExprEvaluatorContextStatement(statementContext);
ExprValidationContext validationContext = new ExprValidationContext(typeService, statementContext.getMethodResolutionService(), null, statementContext.getSchedulingService(), statementContext.getVariableService(), evaluatorContextStmt, statementContext.getEventAdapterService(), statementContext.getStatementName(), statementContext.getStatementId(), statementContext.getAnnotations(), statementContext.getContextDescriptor());
ExprNode validated = ExprNodeUtility.getValidatedSubtree(createDesc.getAssignment(), validationContext);
value = validated.getExprEvaluator().evaluate(null, true, evaluatorContextStmt);
}