UserOption.java

package org.wikipedia.useroption;

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

public class UserOption {
    @NonNull private final String key;
    @Nullable private final String val;

    public UserOption(@NonNull String key) {
        this(key, null);
    }

    public UserOption(@NonNull UserOption option) {
        this(option.key(), option.val());
    }

    public UserOption(@NonNull String key, @Nullable String val) {
        this.key = key;
        this.val = val;
    }

    @NonNull public String key() {
        return key;
    }

    @Nullable public String val() {
        return val;
    }
}