// Copyright 2011 Google Inc. All Rights Reserved.

package com.google.android.apps.mytracks;

import com.google.android.apps.mytracks.content.TrackDataHub;

import android.app.Application;

/**
 * MyTracksApplication for keeping global state.
 * 
 * @author jshih@google.com (Jimmy Shih)
 *
 */
public class MyTracksApplication extends Application {
  private TrackDataHub trackDataHub;

  /**
   * Gets the application's TrackDataHub.
   * 
   */
  public TrackDataHub getTrackDataHub() {
    if (trackDataHub == null) {     
      trackDataHub = TrackDataHub.newInstance(getApplicationContext());
    }
    return trackDataHub;
  }
  
  public void clearTrackDataHub() {
    trackDataHub = null;
  }
}

/*
 * Copyright 2008 Google Inc.
 *
 * 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.google.android.apps.mytracks;

import com.google.android.apps.mytracks.content.TrackDataHub;

import android.app.Application;

/**
 * MyTracksApplication for keeping global state.
 *
 * @author jshih@google.com (Jimmy Shih)
 */
public class MyTracksApplication extends Application {

  private TrackDataHub trackDataHub;

  /**
   * Gets the application's TrackDataHub.
   * 
   * Note: use synchronized to make sure only one instance is created per application.
   */
  public synchronized TrackDataHub getTrackDataHub() {
    if (trackDataHub == null) {
      trackDataHub = TrackDataHub.newInstance(getApplicationContext());
    }
    return trackDataHub;
  }

  public void clearTrackDataHub() {
    trackDataHub = null;
  }
}

Fix based on Sandor's comments
Fix based on Sandor's comments
