* Copyright (C) 2010 deNormans

* http://www.denormans.com/

* All rights reserved.

*

* This software is the confidential and proprietary information of deNormans ("Confidential Information"). You

* shall not disclose such Confidential Information and shall use it only in accordance with the terms of the license

* agreement you entered into with deNormans.

*

* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL

* DENORMANS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,

* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF

* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

  private Map<ObjectType, ObjectDescriber<? extends FBGraphObject>> objectDescribers = new HashMap<ObjectType, ObjectDescriber<? extends FBGraphObject>>();

  private ObjectDescriber<Address> addressDescriber;

  private ObjectDescriber<Education> educationDescriber;

  private ObjectDescriber<Image> imageDescriber;

  private ObjectDescriber<InsightData> insightDataDescriber;

  private ObjectDescriber<PhotoTag> photoTagDescriber;

  private ObjectDescriber<PostAction> postActionDescriber;

  private ObjectDescriber<Work> workDescriber;

  public FBGraphObjectDescribers() {

    registerDescribers();

  }

  private void registerDescribers() {

    objectDescribers.put(ObjectType.Application, new ApplicationDescriber());

    objectDescribers.put(ObjectType.Attachment, new AttachmentDescriber());

    objectDescribers.put(ObjectType.CheckIn, new CheckInDescriber());

    objectDescribers.put(ObjectType.Comment, new CommentDescriber());

    objectDescribers.put(ObjectType.Event, new EventDescriber());

    objectDescribers.put(ObjectType.FriendList, new FriendListDescriber());

    objectDescribers.put(ObjectType.Game, new GameDescriber());

    objectDescribers.put(ObjectType.Group, new GroupDescriber());

    objectDescribers.put(ObjectType.Insights, new InsightsDescriber());

    objectDescribers.put(ObjectType.Link, new LinkDescriber());

    objectDescribers.put(ObjectType.Message, new MessageDescriber());

    objectDescribers.put(ObjectType.MessageThread, new MessageThreadDescriber());

    objectDescribers.put(ObjectType.Movie, new MovieDescriber());

    objectDescribers.put(ObjectType.Music, new MusicDescriber());

    objectDescribers.put(ObjectType.Note, new NoteDescriber());

    objectDescribers.put(ObjectType.Page, new PageDescriber());

    objectDescribers.put(ObjectType.Photo, new PhotoDescriber());

    objectDescribers.put(ObjectType.PhotoAlbum, new PhotoAlbumDescriber());

    objectDescribers.put(ObjectType.Place, new PlaceDescriber());

    objectDescribers.put(ObjectType.Post, new PostDescriber());

    objectDescribers.put(ObjectType.Share, new ShareDescriber());

    objectDescribers.put(ObjectType.StatusMessage, new StatusMessageDescriber());

    objectDescribers.put(ObjectType.Subscription, new SubscriptionDescriber());

    objectDescribers.put(ObjectType.TelevisionShow, new TelevisionShowDescriber());

    objectDescribers.put(ObjectType.User, new UserDescriber());

    objectDescribers.put(ObjectType.Video, new VideoDescriber());

    objectDescribers.put(ObjectType.Account, new SimpleGraphObjectDescriber<Account>(ObjectType.Account));

    objectDescribers.put(ObjectType.Activity, new SimpleGraphObjectDescriber<Activity>(ObjectType.Activity));

    objectDescribers.put(ObjectType.Book, new SimpleGraphObjectDescriber<Book>(ObjectType.Book));

    objectDescribers.put(ObjectType.Company, new SimpleGraphObjectDescriber<Company>(ObjectType.Company));

    objectDescribers.put(ObjectType.EducationYear, new SimpleGraphObjectDescriber<EducationYear>(ObjectType.EducationYear));

    objectDescribers.put(ObjectType.Interest, new SimpleGraphObjectDescriber<Interest>(ObjectType.Interest));

    objectDescribers.put(ObjectType.Language, new SimpleGraphObjectDescriber<Location>(ObjectType.Language));

    objectDescribers.put(ObjectType.Location, new SimpleGraphObjectDescriber<Location>(ObjectType.Location));

    objectDescribers.put(ObjectType.School, new SimpleGraphObjectDescriber<School>(ObjectType.School));

    objectDescribers.put(ObjectType.WorkPosition, new SimpleGraphObjectDescriber<WorkPosition>(ObjectType.WorkPosition));

    addressDescriber = new AddressDescriber();

    educationDescriber = new EducationDescriber();

    imageDescriber = new ImageDescriber();

    insightDataDescriber = new InsightDataDescriber();

    photoTagDescriber = new PhotoTagDescriber();

    postActionDescriber = new PostActionDescriber();

    workDescriber = new WorkDescriber();

  }

  private ObjectDescriber<Account> getAccountDescriber() {

    return getObjectDescriber(ObjectType.Account);

  }

  private ObjectDescriber<Activity> getActivityDescriber() {

    return getObjectDescriber(ObjectType.Activity);

  }

  private ObjectDescriber<Address> getAddressDescriber() {

    return addressDescriber;

  }

  public ObjectDescriber<Application> getApplicationDescriber() {

    return getObjectDescriber(ObjectType.Application);

  }

  private ObjectDescriber<Attachment> getAttachmentDescriber() {

    return getObjectDescriber(ObjectType.Attachment);

  }

  private ObjectDescriber<Book> getBookDescriber() {

    return getObjectDescriber(ObjectType.Book);

  }

  private ObjectDescriber<CheckIn> getCheckInDescriber() {

    return getObjectDescriber(ObjectType.CheckIn);

  }

  private ObjectDescriber<Comment> getCommentDescriber() {

    return getObjectDescriber(ObjectType.Comment);

  }

  private ObjectDescriber<Company> getCompanyDescriber() {

    return getObjectDescriber(ObjectType.Company);

  }

  private ObjectDescriber<Education> getEducationDescriber() {

    return educationDescriber;

  }

  private ObjectDescriber<EducationYear> getEducationYearDescriber() {

    return getObjectDescriber(ObjectType.EducationYear);

  }

  private ObjectDescriber<Event> getEventDescriber() {

    return getObjectDescriber(ObjectType.Event);

  }

  private ObjectDescriber<FriendList> getFriendListDescriber() {

    return getObjectDescriber(ObjectType.FriendList);

  }

  private ObjectDescriber<Group> getGroupDescriber() {

    return getObjectDescriber(ObjectType.Group);

  }

  private ObjectDescriber<Image> getImageDescriber() {

    return imageDescriber;

  }

  private ObjectDescriber<InsightData> getInsightDataDescriber() {

    return insightDataDescriber;

  }

  private ObjectDescriber<Insights> getInsightsDescriber() {

    return getObjectDescriber(ObjectType.Insights);

  }

  private ObjectDescriber<Interest> getInterestDescriber() {

    return getObjectDescriber(ObjectType.Interest);

  }

  private ObjectDescriber<Language> getLanguageDescriber() {

    return getObjectDescriber(ObjectType.Language);

  }

  private ObjectDescriber<Location> getLocationDescriber() {

    return getObjectDescriber(ObjectType.Location);

  }

  private ObjectDescriber<Link> getLinkDescriber() {

    return getObjectDescriber(ObjectType.Link);

  }

  private ObjectDescriber<Movie> getMovieDescriber() {

    return getObjectDescriber(ObjectType.Movie);

  }

  private ObjectDescriber<Music> getMusicDescriber() {

    return getObjectDescriber(ObjectType.Music);

  }

  private ObjectDescriber<Message> getMessageDescriber() {

    return getObjectDescriber(ObjectType.Message);

  }

  private ObjectDescriber<MessageThread> getMessageThreadDescriber() {

    return getObjectDescriber(ObjectType.MessageThread);

  }

  private ObjectDescriber<Note> getNoteDescriber() {

    return getObjectDescriber(ObjectType.Note);

  }

  private ObjectDescriber<Page> getPageDescriber() {

    return getObjectDescriber(ObjectType.Page);

  }

  private ObjectDescriber<Photo> getPhotoDescriber() {

    return getObjectDescriber(ObjectType.Photo);

  }

  private ObjectDescriber<PhotoAlbum> getPhotoAlbumDescriber() {

    return getObjectDescriber(ObjectType.PhotoAlbum);

  }

  private ObjectDescriber<PhotoTag> getPhotoTagDescriber() {

    return photoTagDescriber;

  }

  public ObjectDescriber<Post> getPostDescriber() {

    return getObjectDescriber(ObjectType.Post);

  }

  public ObjectDescriber<Place> getPlaceDescriber() {

    return getObjectDescriber(ObjectType.Place);

  }

  public ObjectDescriber<PostAction> getPostActionDescriber() {

    return postActionDescriber;

  }

  private ObjectDescriber<School> getSchoolDescriber() {

    return getObjectDescriber(ObjectType.School);

  }

  private ObjectDescriber<Share> getShareDescriber() {

    return getObjectDescriber(ObjectType.Share);

  }

  private ObjectDescriber<StatusMessage> getStatusMessageDescriber() {

    return getObjectDescriber(ObjectType.StatusMessage);

  }

  private ObjectDescriber<Subscription> getSubscriptionDescriber() {

    return getObjectDescriber(ObjectType.Subscription);

  }

  private ObjectDescriber<TelevisionShow> getTelevisionShowDescriber() {

    return getObjectDescriber(ObjectType.TelevisionShow);

  }

  public ObjectDescriber<User> getUserDescriber() {

    return getObjectDescriber(ObjectType.User);

  }

  private ObjectDescriber<Video> getVideoDescriber() {

    return getObjectDescriber(ObjectType.Video);

  }

  private ObjectDescriber<Work> getWorkDescriber() {

    return workDescriber;

  }

  private ObjectDescriber<WorkPosition> getWorkPositionDescriber() {

    return getObjectDescriber(ObjectType.WorkPosition);

  }

  @SuppressWarnings({"unchecked"})

  public <T extends FBGraphObject> ObjectDescriber<T> getObjectDescriber(final ObjectType objectType) {

    return (ObjectDescriber<T>)objectDescribers.get(objectType);

  }

  private static class SimpleGraphObjectDescriber<T extends SimpleGraphObject> extends FBGraphObjectDescriber<T> {

    public SimpleGraphObjectDescriber(final ObjectType objectType) {

      super(objectType);

    }

    @Override

    protected ObjectDescription<T> describeObject(final T obj) {

      return super.describeObject(obj).addValue("Username", obj.getUsername()).addValue("Description", obj.getDescription()).addValue("Picture URL", obj.getPictureURL()).addValue("Page URL", obj.getPageURL()).

          addValue("Website", obj.getWebsite()).addValue("Category", obj.getCategory()).addValue("Biography", obj.getBiography()).addValue("Hometown", obj.getHometown()).addValue("Current Location", obj.getCurrentLocation()).

          addValue("Awards", obj.getAwards()).addValue("# Likes", obj.getNumLikes()).addValue("Is Community Page?", obj.isCommunityPage()).addValue("Can Post?", obj.canPost());

    }

  }

  private abstract class PostableObjectDescriber<T extends Postable> extends AbstractGraphObjectDescriber<T> {

    private ObjectType objectType;

    public PostableObjectDescriber(final ObjectType objectType) {

      this.objectType = objectType;

    }

    @Override

    protected ObjectType getObjectType() {

      return objectType;

    }

    @Override

    protected ObjectDescription<T> describeObject(final T obj) {

      return super.describeObject(obj).addValue("From", getUserDescriber().describe(obj.getFrom())).addValue("Comments", getCommentDescriber().describeList(obj.getComments())).addValue("# Likes", obj.getNumLikes()).

          addValue("Likes", getUserDescriber().describeList(obj.getLikes())).

          addAction("Delete", new AbstractAction<T, Boolean>() {

            @Override

            public void execute(final T obj, final String param, final AsyncCallback<Boolean> callback) {

              FBGWT.Graph.Postable.delete(obj.getFullPostableID(), null, callback);

            }

          }).

          addAction("Comments", new AbstractAction<T, List<ObjectDescription<Comment>>>() {

            @Override

            public void execute(final T obj, final String param, final AsyncCallback<List<ObjectDescription<Comment>>> callback) {

              FBGWT.Graph.Postable.retrieveComments(obj.getID(), null, new ListTransformingCallback<Comment>(getCommentDescriber(), callback));

            }

          }).

          addAction("Post Comment", new AbstractParameterizedAction<T, ObjectDescription<Comment>>() {

            @Override

            public void execute(final T obj, final String param, final AsyncCallback<ObjectDescription<Comment>> callback) {

              FBGWT.Graph.Postable.postComment(obj.getID(), FeedPostOptions.createFeedPostOptions().setMessage(param), new ObjectTransformingCallback<Comment>(getCommentDescriber(), callback));

            }

          }).

          addAction("Likes", new AbstractAction<T, List<ObjectDescription<User>>>() {

            @Override

            public void execute(final T obj, final String param, final AsyncCallback<List<ObjectDescription<User>>> callback) {

              FBGWT.Graph.Postable.retrieveLikedByUsers(obj.getID(), null, new ListTransformingCallback<User>(getUserDescriber(), callback));

            }

          }).

          addAction("Like", new AbstractAction<T, Boolean>() {

            @Override

            public void execute(final T obj, final String param, final AsyncCallback<Boolean> callback) {

              FBGWT.Graph.Postable.like(obj.getFullPostableID(), callback);

            }

          }).

          addAction("Unlike", new AbstractAction<T, Boolean>() {

            @Override

            public void execute(final T obj, final String param, final AsyncCallback<Boolean> callback) {

              FBGWT.Graph.Postable.unlike(obj.getFullPostableID(), callback);

            }

          });

    }

  }

  private static abstract class FBGraphObjectDescriber<T extends FBGraphObject> extends AbstractGraphObjectDescriber<T> {

    private ObjectType objectType;

    public FBGraphObjectDescriber(final ObjectType objectType) {

      this.objectType = objectType;

    }

    @Override

    protected ObjectType getObjectType() {

      return objectType;

    }

    @Override

    protected ObjectDescription<T> describeObject(final T obj) {

      return super.describeObject(obj).addValue("Name", obj.getName());

    }

  }

  private static abstract class AbstractGraphObjectDescriber<T extends FBGraphObject> extends AbstractObjectDescriber<T> {

    @Override

    public String getObjectTypeName(final T obj) {

      return getObjectType().name();

    }

    @Override

    protected ObjectDescription<T> describeObject(final T obj) {

      return new GraphObjectDescription<T>(obj, this, getObjectType()).addValue("ID", obj.getID()).

          addAction("Get " + getObjectTypeName(obj), new AbstractAction<T, ObjectDescription<T>>() {

            @Override

            public void execute(final T obj, final String param, final AsyncCallback<ObjectDescription<T>> callback) {

              retrieveItem(obj.getID(), new ObjectTransformingCallback<T>(AbstractGraphObjectDescriber.this, callback));

            }

          });

    }

    protected abstract ObjectType getObjectType();

    protected void retrieveItem(final String itemID, final AsyncCallback<T> callback) {

      FBGWT.Graph.retrieveItem(itemID, null, callback);

    }

    /**

     * HACK: This is needed because of issue http://bugs.developers.facebook.net/show_bug.cgi?id=10714

     *

     * <tt>/likes/</tt> and <tt>delete</tt> need an ID that looks like USERID_ITEMID

     *

     * @param obj The object

     * @param user The object's user

     *

     * @return The full ID for use with like and delete

     */

    protected String getFullID(final T obj, final User user) {

      String id = obj.getID();

      if (user != null && !id.contains(user.getID())) {

        id = user.getID() + "_" + id;

      }

      return id;

    }

  }

  private static class ObjectTransformingCallback<T extends FBJSObject> implements AsyncCallback<T> {

    private final ObjectDescriber<T> describer;

    private final AsyncCallback<ObjectDescription<T>> callback;

    public ObjectTransformingCallback(final ObjectDescriber<T> describer, final AsyncCallback<ObjectDescription<T>> callback) {

      this.describer = describer;

      this.callback = callback;

    }

    @Override

    public void onFailure(final Throwable caught) {

      callback.onFailure(caught);

    }

    @Override

    public void onSuccess(final T result) {

      callback.onSuccess(describer.describe(result));

    }

  }

  private static class ListTransformingCallback<T extends FBJSObject> implements AsyncCallback<List<T>> {

    private final ObjectDescriber<T> describer;

    private final AsyncCallback<List<ObjectDescription<T>>> callback;

    private ListTransformingCallback(final ObjectDescriber<T> describer, final AsyncCallback<List<ObjectDescription<T>>> callback) {

      this.describer = describer;

      this.callback = callback;

    }

    @Override

    public void onFailure(final Throwable caught) {

      callback.onFailure(caught);

    }

    @Override

    public void onSuccess(final List<T> result) {

      callback.onSuccess(describer.describeList(result));

    }

  }

  private class ApplicationDescriber extends FBGraphObjectDescriber<Application> {

    public ApplicationDescriber() {

      super(ObjectType.Application);

    }

    @Override

    protected ObjectDescription<Application> describeObject(final Application obj) {

      // todo: describe application actions

      return super.describeObject(obj).addValue("Description", obj.getDescription()).addValue("Category", obj.getCategory()).addValue("Page URL", obj.getPageURL());

    }

  }

  private class AttachmentDescriber extends FBGraphObjectDescriber<Attachment> {

    public AttachmentDescriber() {

      super(ObjectType.Attachment);

    }

    @Override

    protected ObjectDescription<Attachment> describeObject(final Attachment obj) {

      // todo: describe attachment

      return super.describeObject(obj);

    }

  }

  private class CheckInDescriber extends PostableObjectDescriber<CheckIn> {

    public CheckInDescriber() {

      super(ObjectType.CheckIn);

    }

    @Override

    protected ObjectDescription<CheckIn> describeObject(final CheckIn obj) {

      // todo: describe check-in

      return super.describeObject(obj).addValue("Message", obj.getMessage()).addValue("Place", getPlaceDescriber().describe(obj.getPlace())).addValue("User Tags", getUserDescriber().describeList(obj.getUserTags())).addValue("Application", getApplicationDescriber().describe(obj.getApplication())).

          addValue("Created Time", obj.getCreatedTime());

    }

  }

  private class CommentDescriber extends FBGraphObjectDescriber<Comment> {

    public CommentDescriber() {

      super(ObjectType.Comment);

    }

    @Override

    protected ObjectDescription<Comment> describeObject(final Comment obj) {

      return super.describeObject(obj).addValue("Message", obj.getMessage()).addValue("From", getUserDescriber().describe(obj.getFrom())).addValue("# Likes", obj.getNumLikes()).addValue("Created Time", obj.getCreatedTime()).

          addAction("Delete", new AbstractAction<Comment, Boolean>() {

            @Override

            public void execute(final Comment obj, final String param, final AsyncCallback<Boolean> callback) {

              FBGWT.Graph.Postable.delete(obj.getID(), null, callback);

            }

          }).

          addAction("Likes", new AbstractAction<Comment, List<ObjectDescription<User>>>() {

            @Override

            public void execute(final Comment obj, final String param, final AsyncCallback<List<ObjectDescription<User>>> callback) {

              FBGWT.Graph.Comment.retrieveLikedByUsers(obj.getID(), null, new ListTransformingCallback<User>(getUserDescriber(), callback));

            }

          }).

          addAction("Like", new AbstractAction<Comment, Boolean>() {

            @Override

            public void execute(final Comment obj, final String param, final AsyncCallback<Boolean> callback) {

              FBGWT.Graph.Comment.like(obj.getFullPostableID(), callback);

            }

          }).

          addAction("Unlike", new AbstractAction<Comment, Boolean>() {

            @Override

            public void execute(final Comment obj, final String param, final AsyncCallback<Boolean> callback) {

              FBGWT.Graph.Comment.unlike(obj.getFullPostableID(), callback);

            }

          });

    }

  }

  private class EventDescriber extends FBGraphObjectDescriber<Event> {

    public EventDescriber() {

      super(ObjectType.Event);

    }

    @Override

    protected ObjectDescription<Event> describeObject(final Event obj) {

      // todo: describe event

      return super.describeObject(obj).addValue("Owner", getUserDescriber().describe(obj.getOwner())).addValue("Description", obj.getDescription()).addValue("Start Time", obj.getStartTime()).addValue("End Time", obj.getEndTime()).

          addValue("Location", obj.getLocation()).addValue("Venue", getAddressDescriber().describe(obj.getVenue())).addValue("Privacy", obj.getPrivacy()).addValue("RSVP Status", obj.getRSVPStatus()).

          addValue("Updated Time", obj.getUpdatedTime());

    }

  }

  private class FriendListDescriber extends FBGraphObjectDescriber<FriendList> {

    public FriendListDescriber() {

      super(ObjectType.FriendList);

    }

    @Override

    protected ObjectDescription<FriendList> describeObject(final FriendList obj) {

      return super.describeObject(obj).

          addAction("Delete", new AbstractAction<FriendList, Boolean>() {

            @Override

            public void execute(final FriendList obj, final String param, final AsyncCallback<Boolean> callback) {

              FBGWT.Graph.FriendList.delete(obj.getID(), null, callback);

            }

          }).

          addAction("Members", new AbstractAction<FriendList, List<ObjectDescription<User>>>() {

            @Override

            public void execute(final FriendList obj, final String param, final AsyncCallback<List<ObjectDescription<User>>> callback) {

              FBGWT.Graph.FriendList.retrieveMembers(obj.getID(), null, new ListTransformingCallback<User>(getUserDescriber(), callback));

            }

          }).

          addAction("Add Member", new AbstractParameterizedAction<FriendList, Boolean>() {

            @Override

            public void execute(final FriendList obj, final String param, final AsyncCallback<Boolean> callback) {

              FBGWT.Graph.FriendList.addMember(obj.getID(), param, callback);

            }

          }).

          addAction("Remove Member", new AbstractParameterizedAction<FriendList, Boolean>() {

            @Override

            public void execute(final FriendList obj, final String param, final AsyncCallback<Boolean> callback) {

              FBGWT.Graph.FriendList.removeMember(obj.getID(), param, callback);

            }

          });

    }

  }

  private static class GameDescriber extends SimpleGraphObjectDescriber<Game> {

    public GameDescriber() {

      super(ObjectType.Game);

    }

    @Override

    protected ObjectDescription<Game> describeObject(final Game obj) {

      return super.describeObject(obj).addValue("Mission", obj.getMission()).addValue("Founded", obj.getFounded()).addValue("Company Overview", obj.getCompanyOverview()).addValue("Products", obj.getProducts());

    }

  }

  private class GroupDescriber extends FBGraphObjectDescriber<Group> {

    public GroupDescriber() {

      super(ObjectType.Group);

    }

    @Override

    protected ObjectDescription<Group> describeObject(final Group obj) {

      // todo: describe group actions

      return super.describeObject(obj).addValue("Version", obj.getVersion()).addValue("Description", obj.getDescription()).addValue("Icon URL", obj.getIconURL()).addValue("Page URL", obj.getPageURL()).

          addValue("Owner", getUserDescriber().describe(obj.getOwner())).addValue("Privacy", obj.getPrivacy()).addValue("Updated Time", obj.getUpdatedTime());

    }

  }

  private class InsightsDescriber extends FBGraphObjectDescriber<Insights> {

    public InsightsDescriber() {

      super(ObjectType.Insights);

    }

    @Override

    protected ObjectDescription<Insights> describeObject(final Insights obj) {

      // todo: describe insights

      return super.describeObject(obj).addValue("Period", obj.getPeriod()).addValue("Values", getInsightDataDescriber().describeList(obj.getValues()));

    }

  }

  private class LinkDescriber extends FBGraphObjectDescriber<Link> {

    public LinkDescriber() {

      super(ObjectType.Link);

    }

    @Override

    protected ObjectDescription<Link> describeObject(final Link obj) {

      // todo: describe link

      return super.describeObject(obj).addValue("URL", obj.getURL()).addValue("Caption", obj.getCaption()).addValue("Description", obj.getDescription()).addValue("Icon URL", obj.getIconURL()).addValue("Thumbnail URL", obj.getThumbnailURL()).

          addValue("Message", obj.getMessage()).addValue("Created Time", obj.getCreatedTime());

    }

  }

  private class MessageDescriber extends FBGraphObjectDescriber<Message> {

    public MessageDescriber() {

      super(ObjectType.Message);

    }

    @Override

    protected ObjectDescription<Message> describeObject(final Message obj) {

      // todo: describe message

      return super.describeObject(obj).addValue("To Users", getUserDescriber().describeList(obj.getToUsers())).addValue("Message", obj.getMessage()).addValue("Created Time", obj.getCreatedTime());

    }

  }

  private class MessageThreadDescriber extends FBGraphObjectDescriber<MessageThread> {

    public MessageThreadDescriber() {

      super(ObjectType.MessageThread);

    }

    @Override

    protected ObjectDescription<MessageThread> describeObject(final MessageThread obj) {

      // todo: describe message thread actions

      return super.describeObject(obj).addValue("Snippet", obj.getSnippet()).addValue("Message Count", obj.getMessageCount()).addValue("Unread Count", obj.getUnreadCount()).addValue("Tags", obj.getTags()).addValue("Updated Time", obj.getUpdatedTime());

    }

  }

  private static class MovieDescriber extends SimpleGraphObjectDescriber<Movie> {

    public MovieDescriber() {

      super(ObjectType.Movie);

    }

    @Override

    protected ObjectDescription<Movie> describeObject(final Movie obj) {

      return super.describeObject(obj).addValue("Directed By", obj.getDirectedBy()).addValue("Screenplay By", obj.getScreenplayBy()).addValue("Plot Outline", obj.getPlotOutline()).addValue("Starring", obj.getStarring()).addValue("Studio", obj.getStudio());

    }

  }

  private static class MusicDescriber extends SimpleGraphObjectDescriber<Music> {

    public MusicDescriber() {

      super(ObjectType.Music);

    }

    @Override

    protected ObjectDescription<Music> describeObject(final Music obj) {

      return super.describeObject(obj).addValue("Genre", obj.getGenre()).addValue("Band Members", obj.getBandMembers()).addValue("Record Label", obj.getRecordLabel());

    }

  }

  private class NoteDescriber extends PostableObjectDescriber<Note> {

    public NoteDescriber() {

      super(ObjectType.Note);

    }

    @Override

    protected ObjectDescription<Note> describeObject(final Note obj) {

      // todo: describe note

      return super.describeObject(obj).addValue("Subject", obj.getSubject()).addValue("Message", obj.getMessage()).addValue("Icon URL", obj.getIconURL()).addValue("Created Time", obj.getCreatedTime()).addValue("Updated Time", obj.getUpdatedTime());

    }

  }

  private class PageDescriber extends SimpleGraphObjectDescriber<Page> {

    public PageDescriber() {

      super(ObjectType.Page);

    }

    @Override

    protected ObjectDescription<Page> describeObject(final Page obj) {

      // todo: describe page

      return super.describeObject(obj);

    }

  }

  private class PhotoDescriber extends PostableObjectDescriber<Photo> {

    public PhotoDescriber() {

      super(ObjectType.Photo);

    }

    @Override

    protected ObjectDescription<Photo> describeObject(final Photo obj) {

      // todo: describe photo actions

      return super.describeObject(obj).addValue("Name", obj.getName()).addValue("Page URL", obj.getPageURL()).addValue("Icon URL", obj.getIconURL()).addValue("Tags", getPhotoTagDescriber().describeList(obj.getTags())).

          addValue("Full Size Image", getImageDescriber().describe(obj.getFullSizeImage())).addValue("Images", getImageDescriber().describeList(obj.getImages())).addValue("Album Position", obj.getAlbumPosition()).

          addValue("Created Time", obj.getCreatedTime()).addValue("Updated Time", obj.getUpdatedTime());

    }

  }

  private class PhotoAlbumDescriber extends FBGraphObjectDescriber<PhotoAlbum> {

    public PhotoAlbumDescriber() {

      super(ObjectType.PhotoAlbum);

    }

    @Override

    protected ObjectDescription<PhotoAlbum> describeObject(final PhotoAlbum obj) {

      return super.describeObject(obj).addValue("From", getUserDescriber().describe(obj.getFrom())).addValue("Description", obj.getDescription()).addValue("Location", obj.getLocation()).addValue("Page URL", obj.getPageURL()).

          addValue("# Photos", obj.getNumPhotos()).addValue("Type", obj.getType()).addValue("Privacy", obj.getPrivacy()).addValue("Created Time", obj.getCreatedTime()).addValue("Updated Time", obj.getUpdatedTime()).

          addAction("Photos", new AbstractAction<PhotoAlbum, List<ObjectDescription<Photo>>>() {

            @Override

            public void execute(final PhotoAlbum obj, final String param, final AsyncCallback<List<ObjectDescription<Photo>>> callback) {

              FBGWT.Graph.PhotoAlbum.retrievePhotos(obj.getID(), null, new ListTransformingCallback<Photo>(getPhotoDescriber(), callback));

            }

          }).

          addAction("Comments", new AbstractAction<PhotoAlbum, List<ObjectDescription<Comment>>>() {

            @Override

            public void execute(final PhotoAlbum obj, final String param, final AsyncCallback<List<ObjectDescription<Comment>>> callback) {

              FBGWT.Graph.PhotoAlbum.retrieveComments(obj.getID(), null, new ListTransformingCallback<Comment>(getCommentDescriber(), callback));

            }

          });

    }

  }

  private class PlaceDescriber extends SimpleGraphObjectDescriber<Place> {

    public PlaceDescriber() {

      super(ObjectType.Place);

    }

    @Override

    protected ObjectDescription<Place> describeObject(final Place obj) {

      // todo: describe place

      return super.describeObject(obj).addValue("Location", getAddressDescriber().describe(obj.getLocation()));

    }

  }

  private class PostDescriber extends PostableObjectDescriber<Post> {

    public PostDescriber() {

      super(ObjectType.Post);

    }

    @Override

    protected ObjectDescription<Post> describeObject(final Post obj) {

      // todo: describe post

      return super.describeObject(obj).addValue("Mentioned Users", getUserDescriber().describeList(obj.getMentionedUsers())).addValue("Message", obj.getMessage()).addValue("Picture URL", obj.getPictureURL()).

          addValue("Link URL", obj.getLinkURL()).addValue("Caption", obj.getCaption()).addValue("Description", obj.getDescription()).addValue("Source URL", obj.getSourceURL()).addValue("Icon URL", obj.getIconURL()).

          addValue("Application Attribution", obj.getApplicationAttribution()).addValue("Actions", getPostActionDescriber().describeList(obj.getActions())).addValue("Target Restrictions", obj.getTargetRestrictions()).

          addValue("Created Time", obj.getCreatedTime()).addValue("Updated Time", obj.getUpdatedTime()).

          addAction("Delete", new AbstractAction<Post, Boolean>() {

            @Override

            public void execute(final Post obj, final String param, final AsyncCallback<Boolean> callback) {

              FBGWT.Graph.deleteItem(obj.getID(), null, callback);

            }

          });

    }

  }

    public ShareDescriber() {

      super(ObjectType.Share);

    }

    @Override

    protected ObjectDescription<Share> describeObject(final Share obj) {

      // todo: describe share

      return super.describeObject(obj);

    }

  }

  private class StatusMessageDescriber extends PostableObjectDescriber<StatusMessage> {

    public StatusMessageDescriber() {

      super(ObjectType.StatusMessage);

    }

    @Override

    protected ObjectDescription<StatusMessage> describeObject(final StatusMessage obj) {

      return super.describeObject(obj).addValue("Message", obj.getMessage()).addValue("Updated Time", obj.getUpdatedTime());

    }

  }

  private class SubscriptionDescriber extends FBGraphObjectDescriber<Subscription> {

    public SubscriptionDescriber() {

      super(ObjectType.Subscription);

    }

    @Override

    protected ObjectDescription<Subscription> describeObject(final Subscription obj) {

      // todo: describe subscription actions

      return super.describeObject(obj).addValue("Object Type", obj.getObjectType()).addValue("Fields", obj.getFields()).addValue("Callback URL", obj.getCallbackURL()).addValue("Is Active?", obj.isActive());

    }

  }

  private static class TelevisionShowDescriber extends SimpleGraphObjectDescriber<TelevisionShow> {

    public TelevisionShowDescriber() {

      super(ObjectType.TelevisionShow);

    }

    @Override

    protected ObjectDescription<TelevisionShow> describeObject(final TelevisionShow obj) {

      return super.describeObject(obj).addValue("Starring", obj.getStarring()).addValue("Written By", obj.getWrittenBy()).addValue("Plot Outline", obj.getPlotOutline()).addValue("Network", obj.getNetwork()).

          addValue("Season", obj.getSeason()).addValue("Schedule", obj.getSchedule());

    }

  }

  private class UserDescriber extends FBGraphObjectDescriber<User> {

    public UserDescriber() {

      super(ObjectType.User);

    }

    @Override

    protected ObjectDescription<User> describeObject(final User obj) {

      // todo: describe user content actions

      final ObjectDescriber<User> describer = this;

      TimeZone timeZone = obj.getTimeZone();

      return super.describeObject(obj).addValue("Name", obj.getName()).addValue("First Name", obj.getFirstName()).addValue("Last Name", obj.getLastName()).addValue("Link", obj.getLink()).addValue("About", obj.getAbout()).

          addValue("Birthday", obj.getBirthday()). addValue("Work", getWorkDescriber().describeList(obj.getWork())).addValue("Education", getEducationDescriber().describeList(obj.getEducation())).addValue("Email", obj.getEmail()).

          addValue("Website", obj.getWebsite()). addValue("Location", getLocationDescriber().describe(obj.getLocation())).addValue("Biography", obj.getBiography()).addValue("Quotes", obj.getQuotes()).addValue("Gender", obj.getGender()).

          addValue("Interested in", obj.getInterestedIn()).addValue("Seeking", obj.getSeeking()).addValue("Religion", obj.getReligion()).addValue("Political Affiliation", obj.getPoliticalAffiliation()).

          addValue("Verified", obj.isVerified()).addValue("Significant Other", describe(obj.getSignificantOther())).addValue("Time Zone", timeZone != null ? timeZone.getID() : null).addValue("Third-Party ID", obj.getThirdPartyID()).

          addValue("Locale", obj.getLocale()).addValue("Address", getAddressDescriber().describe(obj.getAddress())).addValue("Mobile Phone", obj.getMobilePhone()).addValue("Relationship Status", obj.getRelationshipStatus()).

          addValue("Languages", getLanguageDescriber().describeList(obj.getLanguages())).addValue("Updated Time", obj.getUpdatedTime()).

          addAction("Home Feed", new AbstractAction<User, List<ObjectDescription<Post>>>() {

            @Override

            public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Post>>> callback) {

              FBGWT.Graph.User.retrieveHomeFeed(obj.getID(), null, new ListTransformingCallback<Post>(getPostDescriber(), callback));

            }

          }).

              addAction("Wall Feed", new AbstractAction<User, List<ObjectDescription<Post>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Post>>> callback) {

                  FBGWT.Graph.User.retrieveWallFeed(obj.getID(), null, new ListTransformingCallback<Post>(getPostDescriber(), callback));

                }

              }).

              addAction("Post to Wall", new AbstractParameterizedAction<User, ObjectDescription<Post>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<ObjectDescription<Post>> callback) {

                  FeedPostOptions postOptions = FeedPostOptions.createFeedPostOptions().setMessage(param);

                  FBGWT.Graph.User.postToWall(obj.getID(), postOptions, new ObjectTransformingCallback<Post>(getPostDescriber(), callback));

                }

              }).

              addAction("Tagged In", new AbstractAction<User, List<ObjectDescription<Post>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Post>>> callback) {

                  FBGWT.Graph.User.retrieveTaggedIn(obj.getID(), null, new ListTransformingCallback<Post>(getPostDescriber(), callback));

                }

              }).

              addAction("Posts", new AbstractAction<User, List<ObjectDescription<Post>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Post>>> callback) {

                  FBGWT.Graph.User.retrievePosts(obj.getID(), null, new ListTransformingCallback<Post>(getPostDescriber(), callback));

                }

              }).

              addAction("Friends", new AbstractAction<User, List<ObjectDescription<User>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<User>>> callback) {

                  FBGWT.Graph.User.retrieveFriends(obj.getID(), null, new ListTransformingCallback<User>(describer, callback));

                }

              }).

              addAction("Activities", new AbstractAction<User, List<ObjectDescription<Activity>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Activity>>> callback) {

                  FBGWT.Graph.User.retrieveActivities(obj.getID(), null, new ListTransformingCallback<Activity>(getActivityDescriber(), callback));

                }

              }).

              addAction("Interests", new AbstractAction<User, List<ObjectDescription<Interest>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Interest>>> callback) {

                  FBGWT.Graph.User.retrieveInterests(obj.getID(), null, new ListTransformingCallback<Interest>(getInterestDescriber(), callback));

                }

              }).

              addAction("Music", new AbstractAction<User, List<ObjectDescription<Music>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Music>>> callback) {

                  FBGWT.Graph.User.retrieveMusic(obj.getID(), null, new ListTransformingCallback<Music>(getMusicDescriber(), callback));

                }

              }).

              addAction("Books", new AbstractAction<User, List<ObjectDescription<Book>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Book>>> callback) {

                  FBGWT.Graph.User.retrieveBooks(obj.getID(), null, new ListTransformingCallback<Book>(getBookDescriber(), callback));

                }

              }).

              addAction("Movies", new AbstractAction<User, List<ObjectDescription<Movie>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Movie>>> callback) {

                  FBGWT.Graph.User.retrieveMovies(obj.getID(), null, new ListTransformingCallback<Movie>(getMovieDescriber(), callback));

                }

              }).

              addAction("Television Shows", new AbstractAction<User, List<ObjectDescription<TelevisionShow>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<TelevisionShow>>> callback) {

                  FBGWT.Graph.User.retrieveTelevisionShows(obj.getID(), null, new ListTransformingCallback<TelevisionShow>(getTelevisionShowDescriber(), callback));

                }

              }).

              addAction("Liked Pages", new AbstractAction<User, List<ObjectDescription<Page>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Page>>> callback) {

                  FBGWT.Graph.User.retrieveLikedPages(obj.getID(), null, new ListTransformingCallback<Page>(getPageDescriber(), callback));

                }

              }).

              addAction("Photos", new AbstractAction<User, List<ObjectDescription<Photo>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Photo>>> callback) {

                  FBGWT.Graph.User.retrievePhotos(obj.getID(), null, new ListTransformingCallback<Photo>(getPhotoDescriber(), callback));

                }

              }).

              addAction("Photo Albums", new AbstractAction<User, List<ObjectDescription<PhotoAlbum>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<PhotoAlbum>>> callback) {

                  FBGWT.Graph.User.retrievePhotoAlbums(obj.getID(), null, new ListTransformingCallback<PhotoAlbum>(getPhotoAlbumDescriber(), callback));

                }

              }).

              addAction("Videos", new AbstractAction<User, List<ObjectDescription<Video>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Video>>> callback) {

                  FBGWT.Graph.User.retrieveVideos(obj.getID(), null, new ListTransformingCallback<Video>(getVideoDescriber(), callback));

                }

              }).

              addAction("Groups", new AbstractAction<User, List<ObjectDescription<Group>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Group>>> callback) {

                  FBGWT.Graph.User.retrieveGroups(obj.getID(), null, new ListTransformingCallback<Group>(getGroupDescriber(), callback));

                }

              }).

              addAction("Status Messages", new AbstractAction<User, List<ObjectDescription<StatusMessage>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<StatusMessage>>> callback) {

                  FBGWT.Graph.User.retrieveStatusMessages(obj.getID(), null, new ListTransformingCallback<StatusMessage>(getStatusMessageDescriber(), callback));

                }

              }).

              addAction("Links", new AbstractAction<User, List<ObjectDescription<Link>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Link>>> callback) {

                  FBGWT.Graph.User.retrieveLinks(obj.getID(), null, new ListTransformingCallback<Link>(getLinkDescriber(), callback));

                }

              }).

              addAction("Notes", new AbstractAction<User, List<ObjectDescription<Note>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Note>>> callback) {

                  FBGWT.Graph.User.retrieveNotes(obj.getID(), null, new ListTransformingCallback<Note>(getNoteDescriber(), callback));

                }

              }).

              addAction("Events", new AbstractAction<User, List<ObjectDescription<Event>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Event>>> callback) {

                  FBGWT.Graph.User.retrieveEvents(obj.getID(), null, new ListTransformingCallback<Event>(getEventDescriber(), callback));

                }

              }).

              addAction("Message Threads", new AbstractAction<User, List<ObjectDescription<MessageThread>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<MessageThread>>> callback) {

                  FBGWT.Graph.User.retrieveMessageThreads(obj.getID(), null, new ListTransformingCallback<MessageThread>(getMessageThreadDescriber(), callback));

                }

              }).

              addAction("Inbox", new AbstractAction<User, List<ObjectDescription<Note>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Note>>> callback) {

                  FBGWT.Graph.User.retrieveInbox(obj.getID(), null, new ListTransformingCallback<Note>(getNoteDescriber(), callback));

                }

              }).

              addAction("Outbox", new AbstractAction<User, List<ObjectDescription<Note>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Note>>> callback) {

                  FBGWT.Graph.User.retrieveOutbox(obj.getID(), null, new ListTransformingCallback<Note>(getNoteDescriber(), callback));

                }

              }).

              addAction("Updates", new AbstractAction<User, List<ObjectDescription<Note>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Note>>> callback) {

                  FBGWT.Graph.User.retrieveUpdates(obj.getID(), null, new ListTransformingCallback<Note>(getNoteDescriber(), callback));

                }

              }).

              addAction("Accounts", new AbstractAction<User, List<ObjectDescription<Account>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<Account>>> callback) {

                  FBGWT.Graph.User.retrieveAccounts(obj.getID(), null, new ListTransformingCallback<Account>(getAccountDescriber(), callback));

                }

              }).

              addAction("Check-ins", new AbstractAction<User, List<ObjectDescription<CheckIn>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<CheckIn>>> callback) {

                  FBGWT.Graph.User.retrieveCheckIns(obj.getID(), null, new ListTransformingCallback<CheckIn>(getCheckInDescriber(), callback));

                }

              }).

              addAction("Friend Lists", new AbstractAction<User, List<ObjectDescription<FriendList>>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<List<ObjectDescription<FriendList>>> callback) {

                  FBGWT.Graph.User.retrieveFriendLists(obj.getID(), null, new ListTransformingCallback<FriendList>(getFriendListDescriber(), callback));

                }

              }).

              addAction("Create Friend List", new AbstractParameterizedAction<User, ObjectDescription<FriendList>>() {

                @Override

                public void execute(final User obj, final String param, final AsyncCallback<ObjectDescription<FriendList>> callback) {

                  FBGWT.Graph.User.createFriendList(obj.getID(), param, new ObjectTransformingCallback<FriendList>(getFriendListDescriber(), callback));

                }

              });

    }

  }

  private class VideoDescriber extends PostableObjectDescriber<Video> {

    public VideoDescriber() {

      super(ObjectType.Video);

    }

    @Override

    protected ObjectDescription<Video> describeObject(final Video obj) {

      return super.describeObject(obj).addValue("Tags", getUserDescriber().describeList(obj.getTags())).addValue("Embed HTML URL", obj.getEmbedHTMLURL()).addValue("Icon URL", obj.getIconURL()).

          addValue("Source URL", obj.getSourceURL()).addValue("Created Time", obj.getCreatedTime()).addValue("Updated Time", obj.getUpdatedTime());

    }

  }

  // non graph objects

  private class AddressDescriber extends AbstractObjectDescriber<Address> {

    @Override

    public String getObjectTypeName(final Address obj) {

      return "Address";

    }

    @Override

    protected ObjectDescription<Address> describeObject(final Address obj) {

      return new ObjectDescription<Address>(obj, this).addValue("Street", obj.getStreet()).addValue("City", obj.getCity()).addValue("State", obj.getState()).addValue("Country", obj.getCountry()).addValue("Postal Code", obj.getPostalCode()).

          addValue("Has Latitude/Longitude?", obj.hasLatitudeAndLongitude()).addValue("Latitude", obj.getLatitude()).addValue("Longitude", obj.getLongitude());

    }

  }

  private class EducationDescriber extends AbstractObjectDescriber<Education> {

    @Override

    public String getObjectTypeName(final Education obj) {

      return "Education";

    }

    @Override

    public ObjectDescription<Education> describeObject(final Education obj) {

      return new ObjectDescription<Education>(obj, this).addValue("School", getSchoolDescriber().describe(obj.getSchool())).addValue("Year", getEducationYearDescriber().describe(obj.getYear())).addValue("Type", obj.getType());

    }

  }

  private class ImageDescriber extends AbstractObjectDescriber<Image> {

    @Override

    public String getObjectTypeName(final Image obj) {

      return "Image";

    }

    @Override

    public ObjectDescription<Image> describeObject(final Image obj) {

      return new ObjectDescription<Image>(obj, this).addValue("Photo URL", obj.getImageURL()).addValue("Height", obj.getHeight()).addValue("Width", obj.getWidth());