berryIServiceLocator.h

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/*============================================================================
 
The Medical Imaging Interaction Toolkit (MITK)
 
Copyright (c) German Cancer Research Center (DKFZ)
All rights reserved.
 
Use of this source code is governed by a 3-clause BSD license that can be
found in the LICENSE file.
 
============================================================================*/
 
 
#ifndef BERRYISERVICELOCATOR_H_
#define BERRYISERVICELOCATOR_H_
 
#include <org_blueberry_ui_qt_Export.h>
 
#include <berryObject.h>
#include <berryMacros.h>
#include <berryLog.h>
 
#include <QObject>
 
#include <typeinfo>
 
namespace berry {
 
struct BERRY_UI_QT IServiceLocator : public virtual Object
{
 
  berryObjectMacro(berry::IServiceLocator, Object);
 
  ~IServiceLocator() override;
 
  template<class S>
  S* GetService()
  {
    const char* typeName = qobject_interface_iid<S*>();
    if (typeName == nullptr)
    {
      BERRY_WARN << "Error getting service: Cannot get the interface id for type '" << Reflection::GetClassName<S>()
                 << "'. It is probably missing a Q_DECLARE_INTERFACE macro in its header.";
      return nullptr;
    }
    Object* obj = this->GetService(typeName);
    S* service = dynamic_cast<S*>(obj);
    if (obj != nullptr && service == nullptr)
    {
      BERRY_WARN << "Error getting service: Class '" << obj->GetClassName() << "' cannot be cast to service interface "
                 << "'" << Reflection::GetClassName<S>() << "'";
    }
    return service;
  }
 
  template<class S>
  bool HasService() const
  {
    return this->HasService(qobject_interface_iid<S*>());
  }
 
  virtual Object* GetService(const QString& api) = 0;
  virtual bool HasService(const QString& api) const = 0;
};
 
}
 
#endif /* BERRYISERVICELOCATOR_H_ */