I have Object1 and Object2. Now, I want to map object3, with attributes from 1 & 2.
Say, I have 2 object:
1. User: {first_name, last_name, id}
2. Address: {street, locality, city, state, pin, id}
Now, with these, I want to map that in
User_View: {firstName, lastName, city, state}.
Where, first_name & last_name will be from User object and city & state from Address object.
Now, my question is, how to do that?
However, currently, I'm doing like this
@Mapper
public abstract class UserViewMapper {
@Mappings({
@Mapping(source = "first_name", target = "firstName"),
@Mapping(source = "last_name", target = "lastName"),
@Mapping(target = "city", ignore = true),
@Mapping(target = "state", ignore = true)
})
public abstract UserView userToView(User user);
public UserView addressToView(UserView userView, Address address) {
if (userView == null) {
return null;
}
if (address == null) {
return null;
}
userView.setCity(address.getCity());
userView.setState(address.getState());
return userView;
}
}
But, here, I have to manually write the mapping in addressToView()
.
Therefore, is there, any way, to avoid that?
Or, what would be the preferred way, to handle such situations?
You can declare a mapping method with several source parameters and refer to the properties of all these parameters in your @Mapping
annotations:
@Mapper
public abstract class UserViewMapper {
@Mapping(source = "first_name", target = "user.firstName"),
@Mapping(source = "last_name", target = "user.lastName"),
public abstract UserView userAndAddressToView(User user, Address address);
}
As the "city" and "state" property names match in source and target, there is no need for mapping them.
Also see the chapter "Defining a mapper" in the reference documentation for more details.