Card.java

package org.wikipedia.feed.model;

import android.net.Uri;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;

import org.wikipedia.model.BaseModel;

public abstract class Card extends BaseModel {
    @NonNull public String title() {
        return "";
    }

    @Nullable public String subtitle() {
        return null;
    }

    @Nullable public Uri image() {
        return null;
    }

    @Nullable public String extract() {
        return null;
    }

    @NonNull public abstract CardType type();

    public String getHideKey() {
        return Long.toString(type().code() + dismissHashCode());
    }

    protected int dismissHashCode() {
        return hashCode();
    }
}