usServiceReference.h

Go to the documentation of this file.

/*============================================================================
 
  Library: CppMicroServices
 
  Copyright (c) German Cancer Research Center (DKFZ)
  All rights reserved.
 
  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
 
    https://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 USSERVICEREFERENCE_H
#define USSERVICEREFERENCE_H
 
#include <usServiceInterface.h>
#include <usServiceReferenceBase.h>
 
US_BEGIN_NAMESPACE
 
template<class S>
class ServiceReference : public ServiceReferenceBase {
 
public:
 
  typedef S ServiceType;
 
  ServiceReference() : ServiceReferenceBase()
  {
  }
 
  ServiceReference(const ServiceReferenceBase& base)
    : ServiceReferenceBase(base)
  {
    const std::string interfaceId(us_service_interface_iid<S>());
    if (GetInterfaceId() != interfaceId)
    {
      if (this->IsConvertibleTo(interfaceId))
      {
        this->SetInterfaceId(interfaceId);
      }
      else
      {
        this->operator =(0);
      }
    }
  }
 
  using ServiceReferenceBase::operator=;
 
};
 
template<>
class ServiceReference<void> : public ServiceReferenceBase
{
 
public:
 
  ServiceReference() : ServiceReferenceBase()
  {
  }
 
  ServiceReference(const ServiceReferenceBase& base)
    : ServiceReferenceBase(base)
  {
  }
 
  using ServiceReferenceBase::operator=;
 
  typedef void ServiceType;
};
 
typedef ServiceReference<void> ServiceReferenceU;
 
US_END_NAMESPACE
 
#endif // USSERVICEREFERENCE_H