/**
 * Copyright 2010 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 org.waveprotocol.box.server.rpc.render.view.impl;

import org.waveprotocol.box.server.rpc.render.view.ReplyBoxView;
import org.waveprotocol.box.server.rpc.render.view.ConversationView;
import org.waveprotocol.box.server.rpc.render.view.IntrinsicThreadView;
import org.waveprotocol.box.server.rpc.render.view.RootThreadView;

/**
 * Implements a thread view by delegating primitive state matters to a view
 * object, and structural state matters to a helper. The intent is that the
 * helper is a flyweight handler.
 *
 * @param <I> intrinsic thread implementation
 */
public final class RootThreadViewImpl<I extends IntrinsicThreadView> // \u2620
    extends ThreadViewImpl<I, RootThreadViewImpl.Helper<? super I>> implements RootThreadView {

  /**
   * Handles structural queries on thread views.
   *
   * @param <I> intrinsic thread implementation
   */
  public interface Helper<I> extends ThreadViewImpl.Helper<I> {
    ConversationView getThreadParent(I thread);
    ReplyBoxView getIndicator(I thread);
  }

  public RootThreadViewImpl(Helper<? super I> helper, I impl) {
    super(helper, impl);
  }

  @Override
  public Type getType() {
    return Type.ROOT_THREAD;
  }

  @Override
  public ConversationView getParent() {
    return helper.getThreadParent(impl);
  }

  public ReplyBoxView getReplyIndicator() {
    return helper.getIndicator(impl);
  }

  @Override
  public void setTotalBlipCount(int totalBlipCount) {
    impl.setTotalBlipCount(totalBlipCount);
  }

  @Override
  public void setUnreadBlipCount(int unreadBlipCount) {
    impl.setUnreadBlipCount(unreadBlipCount);
  }
}