Suppose I have entity hierarchy, e. g. House
which has a list of Apartment
objects and a list of Owner
objects (let it be something like hotel). I. e., the simplified structure will look like:
public class House {
// lazy
public List<Owner> owners;
// lazy
public List<Apartment> aparts;
public String name;
public Integer id;
// some other props
}
public class Apartment {
// some props
}
public class Owner {
public String name;
public int age;
// tons of other props
}
Now, if I want to pass a JSON representation to presentation layer, I'm creating something like HouseModel
with all the properties and converter which would populate all the properties, including apartments
and owners
. This would be fine if I need to show one house
with all the details and stuff though if I later need to create e. g. list of houses in the city it will be waste of time on converting apartments
and owners
as I will need only names and ids for such a list. Some other case might require only owners
to be fetched, another one - apartments etc. Same for other entities and, of course, real life example will be much more complicated.
Does anybody know any good pattern/solution to this problem?
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