compare wrongly returns UNTOUCHED

[Kira-Cesonia]

I have two quite different objects

    public static GameCharacter sylvia() {

        String characterName = "Sylvia the Hero";

        String weaponName = "Gryphclaw";
        int attack = 255;
        Weapon weapon = new Weapon(weaponName, attack);

        String armorName = "Starscale Armor";
        int defense = 231;
        Armor armor = new Armor(armorName, defense);

        String _id = "sylv01";

        List<Item> inventory = new ArrayList<Item>();
        Potion potion = new Potion("Hi-Potion", 3);
        inventory.add(potion);
        Ether ether = new Ether("Mega Ether", 5, 200);
        inventory.add(ether);

        GameCharacter sylvia = new GameCharacter(characterName, weapon, armor, _id, inventory);
        return sylvia;
    }

    public static GameCharacter sylviaEdited() {

        String characterName = "Sylvia Zerin";

        String weaponName = "Luberjack's Axe";
        int attack = 7;
        Weapon weapon = new Weapon(weaponName, attack);

        String armorName = "Crude Mazoiscale Armor";
        int defense = 13;
        Armor armor = new Armor(armorName, defense);

        String _id = "sylv01";

        List<Item> inventory = new ArrayList<Item>();
        Potion potion = new Potion("Hi-Potion", 2);
        inventory.add(potion);
        Tonic tonic = new Tonic("Full Tonic", 2, 100);
        inventory.add(tonic);

        GameCharacter sylvia = new GameCharacter(characterName, weapon, armor, _id, inventory);
        return sylvia;
    }

When comparing them like this:

        GameCharacter sylvia = GameCharacters.sylvia();
        GameCharacter sylviaEdited = GameCharacters.sylviaEdited();

        DiffNode cityDelta
            = objectDiffer.compare(sylvia, sylviaEdited);

...the resulting DiffNode tells reads / => UNTOUCHED, even though the two compared objects are quite different.

Looking through the issues, I have found mentions of this being because the objects are POJOs and not JavaBeans. I have also seen mention of an Introspector and the IntrospectionConfiguration. I have been trying to figure something out with this, but have not come to a solution.

Is it possible to adequately compare objects like these?

public class GameCharacter {
    @Id
    public String _id;
    public String name;
    public Weapon weapon;
    public Armor armor;
    public List<Item> inventory;

    public GameCharacter() {

    }

    public GameCharacter(String name, Weapon weapon, Armor armor, String _id, List<Item> inventory) {
        this._id = _id;
        this.name = name;
        this.weapon = weapon;
        this.armor = armor;
        this.inventory = inventory;
    }
}

The main question here is if it is possible to somehow use java-object-diff without the need to implement getters and setters.

For reference, you can find all the files and my attempts in the following repository: https://github.com/Kira-Cesonia/tri-JaDe Check out the delta.DeltaApplierTest