MultiplexingDataObserver.h

//
// Licensed to Green Energy Corp (www.greenenergycorp.com) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  Green Enery Corp licenses this file
// to you 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.
//
#ifndef __MULTIPLEXING_DATA_OBSERVER_H_
#define __MULTIPLEXING_DATA_OBSERVER_H_


#include "DataInterfaces.h"
#include "Lock.h"
#include <vector>

namespace apl
{
/** DataObserver for sending updates to multiple data observers.
*/
class MultiplexingDataObserver : public apl::IDataObserver
{
public:

	MultiplexingDataObserver();
	MultiplexingDataObserver(IDataObserver* apObserver1);
	MultiplexingDataObserver(IDataObserver* apObserver1, IDataObserver* apObserver2);

	void AddObserver(IDataObserver* apObserver1);

private:

	std::vector<IDataObserver*> mObservers;

	SigLock mLock;

	void _Start();

	void _End();

	void StartOrEnd(bool aStart);

	void _Update(const Binary& arPoint, size_t aIndex);
	void _Update(const Analog& arPoint, size_t aIndex);
	void _Update(const Counter& arPoint, size_t aIndex);
	void _Update(const ControlStatus& arPoint, size_t aIndex);
	void _Update(const SetpointStatus& arPoint, size_t aIndex);

	template <typename T>
	void PassThrough(const T& arPoint, size_t aIndex);
};

}

#endif