Create an Entity

An Entity can use almost any Java data type. However, there are can be some special cases which are not possible.

E.g. The standard PojoCodec of mongodb only allows String as keys in Map. This was using a Custom MapCodec. In the references on github you can find all links which helped immensely.

If you found one any other incompatible data type, let me know and I'll implement it.

Requirements for entities

All entities must fulfil the following properties

1. Only one constructor, which is public and has no arguments, is existing

2. There is exactly 1 field with the @Id annotation to define the unique identifier.

3. All fields are not final !

Except for the properties above, the entity can be adapted dynamically.

Example entity Customer:

import eu.koboo.en2do.annotation.*;
import lombok.*;

import java.util.*;

@Getter // from lombok - required (to access fields)
@Setter // from lombok - required (to change fields)
@NoArgsConstructor // from lombok - required (for mongodb, to create instances)
@FieldDefaults(level = AccessLevel.PRIVATE) // from lombok - optional
@ToString // from lombok
public class Customer {

    // from en2do - unique identifier (can be String, int, long, UUID or any object)
    // this will also create an index on this field to speed up queries on the unique identifier
    @Id
    UUID uniqueId;

    int customerId;
    String firstName;
    String lastName;
    String birthday;
    String street;
    int houseNumber;
    Integer postalCode;
    String city;
    Long phoneNumber;
    double balance;
    List<Order> orders;
}

ATTENTION: There are also some Annotations from the MongoDB driver, but en2do doesn't support them. Please only use the Annotations from en2do directly!