package com.lin1987www.app;

import android.os.Bundle;

/**
 * Created by lin on 2014/9/1.
 * StateManager is helping Bundle data to save.
 */
public class ParcelableManager {
    private static ParcelableManager defaultParcelableManager;
    private Bundle data = new Bundle();

    public static ParcelableManager getDefaultParcelableManager() {
        if (defaultParcelableManager == null) {
            synchronized (ParcelableManager.class) {
                if (defaultParcelableManager == null) {
                    defaultParcelableManager = new ParcelableManager();
                }
            }
        }
        return defaultParcelableManager;
    }

    public void onCreate(Bundle savedInstanceState) {
        if (savedInstanceState == null) {
            return;
        }
        data = savedInstanceState.getParcelable(this.getClass().getName());
        for (String className : data.keySet()) {
            ParcelableKeeper<?> parcelableKeeper = (ParcelableKeeper<?>) data.get(className);
            parcelableKeeper.onRestoreInstanceState();
        }
    }

    public void onSaveInstanceState(Bundle outState) {
        for (String className : data.keySet()) {
            ParcelableKeeper<?> parcelableKeeper = (ParcelableKeeper<?>) data.get(className);
            parcelableKeeper.onSaveInstanceState();
        }
        outState.putParcelable(this.getClass().getName(), data);
    }

    public void add(ParcelableKeeper<?> parcelableKeeper) {
        data.putParcelable(parcelableKeeper.getClass().getName(), parcelableKeeper);
    }
}