Complex Join using criteria builder

Question

I have the following code, where Class has a relationship with Student through students property.

Root<SchoolClass> root = criteria.from(SchoolClass.class);
Join<SchoolClass, Student> classStudentMapping = root.join("students");

This is working fine, no problem. But now I want to join to another entity which has no relationship with Classes but only with student. say Address... How I can join using criteria builder?

Answer 1

Simply, start the secon join from classStudentMapping :

Join<Student, Address> = classStudentMapping.join("address");

This is possible because the interface involved in this process, From<Z,X> , extends Path<X> , therefore classStudentMapping is a Path<Student> .