/*
 * Copyright (C) 2013 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License
 */

package com.android.incallui.baseui;

import android.os.Bundle;

/** Base class for Presenters. */
public abstract class Presenter<U extends Ui> {

  private U ui;

  /**
   * Called after the UI view has been created. That is when fragment.onViewCreated() is called.
   *
   * @param ui The Ui implementation that is now ready to be used.
   */
  public void onUiReady(U ui) {
    this.ui = ui;
  }

  /** Called when the UI view is destroyed in Fragment.onDestroyView(). */
  public final void onUiDestroy(U ui) {
    onUiUnready(ui);
    this.ui = null;
  }

  /**
   * To be overriden by Presenter implementations. Called when the fragment is being destroyed but
   * before ui is set to null.
   */
  public void onUiUnready(U ui) {}

  public void onSaveInstanceState(Bundle outState) {}

  public void onRestoreInstanceState(Bundle savedInstanceState) {}

  public U getUi() {
    return ui;
  }
}