/**
* 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.BlipView;
import org.waveprotocol.box.server.rpc.render.view.IntrinsicThreadView;
import org.waveprotocol.box.server.rpc.render.view.ThreadReplyIndicatorView;
import org.waveprotocol.box.server.rpc.render.view.ThreadView;
import org.waveprotocol.box.server.rpc.render.view.View;
import org.waveprotocol.wave.model.conversation.ConversationBlip;
/**
* 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
* @param <H> flyweight handler / helper type
*/
abstract class ThreadViewImpl<
I extends IntrinsicThreadView, H extends ThreadViewImpl.Helper<? super I>>
extends AbstractStructuredView<H, I> implements ThreadView {
/**
* Handles structural queries on thread views.
*
* @param <I> intrinsic thread implementation
*/
public interface Helper<I> {
BlipView insertBlipBefore(I thread, View ref, ConversationBlip blip);
BlipView insertBlipAfter(I thread, View ref, ConversationBlip blip);
BlipView getBlipBefore(I thread, View ref);
BlipView getBlipAfter(I thread, View ref);
View getThreadParent(I thread);
void removeThread(I thread);
ThreadReplyIndicatorView getIndicator( I thread );
}
public ThreadViewImpl(H helper, I impl) {
super(helper, impl);
}
@Override
public String getId() {
return impl.getId();
}
@Override
public BlipView getBlipBefore(View ref) {
return helper.getBlipBefore(impl, ref);
}
@Override
public BlipView getBlipAfter(View ref) {
return helper.getBlipAfter(impl, ref);
}
@Override
public BlipView insertBlipBefore(View ref, ConversationBlip blip) {
return helper.insertBlipBefore(impl, ref, blip);
}
@Override
public BlipView insertBlipAfter(View ref, ConversationBlip blip) {
return helper.insertBlipAfter(impl, ref, blip);
}
@Override
public View getParent() {
return helper.getThreadParent(impl);
}
@Override
public void remove() {
helper.removeThread(impl);
}
}