How To Represent Nested Data In Firebase Class

Taken from the Firebase example, if I have a Dinosaurs facts data structure like this: { 'lambeosaurus': { 'name': 'lamby', 'work': 'eat', 'dimensions': { 'heig

Solution 1:

The JavaBean class to represent this structure is:

publicstaticclassDinosaurFacts {
    String name;
    String work;
    Dimensions dimensions;

    public String getName() {
        return name;
    }

    public String getWork() {
        return work;
    }

    public Dimensions getDimensions() {
        return dimensions;
    }

    publicclassDimensions {
        double height;
        long weight;
        double length;

        publicdoublegetHeight() {
            return height;
        }

        publiclonggetWeight() {
            return weight;
        }

        publicdoublegetLength() {
            return length;
        }
    }
}

Then you can read a dino with:

DinosaurFacts dino = dinoSnapshot.getValue(DinosaurFacts.class);

And access the dimensions with for example:

dino.getDimensions().getWeight();

Solution 2:

I followed Frank's answer but I got an error that says:

subclass needs an empty constructor

even though I had one.

Answer :

Create a new (outer) class for it.

---

Here is my example:

1st Class:

publicclassEvent{

    privateString name;
    private Place place;
}

Sub Class:

publicclassPlace{

     privateString name;
     private Location location;

}

Sub of Sub Class:

publicclassLocation{

     privateString city;
     privateDouble longitude, latitude;

}