content: /**
   * Copyright 2010-present Facebook.
   *
   * 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.facebook;
  
  /**
   * Indicates where a Facebook access token was obtained from.
   */
  public enum AccessTokenSource {
      /**
       * Indicates an access token has not been obtained, or is otherwise invalid.
       */
      NONE(false),
      /**
       * Indicates an access token was obtained by the user logging in through the
       * Facebook app for Android using the web login dialog.
       */
      FACEBOOK_APPLICATION_WEB(true),
      /**
       * Indicates an access token was obtained by the user logging in through the
       * Facebook app for Android using the native login dialog.
       */
      FACEBOOK_APPLICATION_NATIVE(true),
      /**
       * Indicates an access token was obtained by asking the Facebook app for the
       * current token based on permissions the user has already granted to the app.
       * No dialog was shown to the user in this case.
       */
      FACEBOOK_APPLICATION_SERVICE(true),
      /**
       * Indicates an access token was obtained by the user logging in through the
       * Web-based dialog.
       */
      WEB_VIEW(false),
      /**
       * Indicates an access token is for a test user rather than an actual
       * Facebook user.
       */
      TEST_USER(true),
      /**
       * Indicates an access token constructed with a Client Token.
       */
      CLIENT_TOKEN(true);
  
      private final boolean canExtendToken;
  
      AccessTokenSource(boolean canExtendToken) {
          this.canExtendToken = canExtendToken;
      }
  
      boolean canExtendToken() {
          return canExtendToken;
      }
  }
  