Java 16 Records with JPA and jOOQ
The new Java version 16 includes a new feature: Records Java Records The new Java version 16 includes a new feature: Records https://openjdk.java.net/jeps/395 “Enhance the Java programming language with records , which are classes that act as transparent carriers for immutable data. Records can be thought of as nominal tuples.” Let’s try Java records with JPA and jOOQ. JPA Constructor Expression One way to use projection in JPA queries is using the constructor expression. The name constructor expression implies that the constructor is called with the fields from the projection. select new com.demo.dto.EmployeeDTO(e.name, e.department.name) from Employee e In the example we have a DTO called EmployeeDTO and the constructor takes two Strings as parameters. With Java before Java 16 we would create a class like this: public final class EmployeeDTO { private final String employeeName; private final String departmentName; pu...
