content: /*
   * Copyright (C) 2013 Glyptodon LLC
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   */
  
  package org.glyptodon.guacamole.net.basic.properties;
  
  import java.lang.reflect.InvocationTargetException;
  import org.glyptodon.guacamole.GuacamoleException;
  import org.glyptodon.guacamole.net.auth.AuthenticationProvider;
  import org.glyptodon.guacamole.net.basic.GuacamoleClassLoader;
  import org.glyptodon.guacamole.properties.GuacamoleProperty;
  
  /**
   * A GuacamoleProperty whose value is the name of a class to use to
   * authenticate users. This class must implement AuthenticationProvider.
   *
   * @author Michael Jumper
   */
  public abstract class AuthenticationProviderProperty implements GuacamoleProperty<AuthenticationProvider> {
  
      @Override
      public AuthenticationProvider parseValue(String authProviderClassName) throws GuacamoleException {
  
          // If no property provided, return null.
          if (authProviderClassName == null)
              return null;
  
          // Get auth provider instance
          try {
  
              Object obj = GuacamoleClassLoader.getInstance().loadClass(authProviderClassName)
                              .getConstructor().newInstance();
  
              if (!(obj instanceof AuthenticationProvider))
                  throw new GuacamoleException("Specified authentication provider class is not a AuthenticationProvider.");
  
              return (AuthenticationProvider) obj;
  
          }
          catch (ClassNotFoundException e) {
              throw new GuacamoleException("Authentication provider class not found", e);
          }
          catch (NoSuchMethodException e) {
              throw new GuacamoleException("Default constructor for authentication provider not present", e);
          }
          catch (SecurityException e) {
              throw new GuacamoleException("Creation of authentication provider disallowed; check your security settings", e);
          }
          catch (InstantiationException e) {
              throw new GuacamoleException("Unable to instantiate authentication provider", e);
          }
          catch (IllegalAccessException e) {
              throw new GuacamoleException("Unable to access default constructor of authentication provider", e);
          }
          catch (InvocationTargetException e) {
              throw new GuacamoleException("Internal error in constructor of authentication provider", e.getTargetException());
          }
  
      }
  
  }
  
  