Session: Querying: How to perform projection?

The most common projection is done by using select method.

Example I

// request 'FirstName' and 'LastName' from server
// and project it to 'EmployeeFirstAndLastName'
session
  .query(Employee.class)
  .select(EmployeeFirstAndLastName.class, "firstName", "lastName")
  .toList();

Example II

// request 'FirstName' and 'LastName' from server
// and project it to 'EmployeeFirstAndLastName'
QHowToPerformProjection_EmployeeFirstAndLastName e =
  QHowToPerformProjection_EmployeeFirstAndLastName.employeeFirstAndLastName;
session
  .query(Employee.class)
  .select(EmployeeFirstAndLastName.class, e.firstName, e.lastName)
  .toList();

Detailed article about using transformers with queries can be found here.