usServiceListenerHook.h

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/*=============================================================================

  Library: CppMicroServices

  Copyright (c) German Cancer Research Center,
    Division of Medical and Biological Informatics

  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.

=============================================================================*/

#ifndef USSERVICELISTENERHOOK_H
#define USSERVICELISTENERHOOK_H

#include "usServiceInterface.h"
#include "usShrinkableVector.h"
#include "usSharedData.h"

#include <string>

US_BEGIN_NAMESPACE

class ModuleContext;
class ServiceListenerEntry;

struct US_Core_EXPORT ServiceListenerHook
{

  class ListenerInfoData;

  struct US_Core_EXPORT ListenerInfo
  {
    ListenerInfo();

    ListenerInfo(const ListenerInfo& other);

    ~ListenerInfo();

    ListenerInfo& operator=(const ListenerInfo& other);

    bool IsNull() const;

    ModuleContext* GetModuleContext() const;

    std::string GetFilter() const;

    bool IsRemoved() const;

    bool operator==(const ListenerInfo& other) const;

  private:

    friend class ServiceListenerEntry;

    US_HASH_FUNCTION_FRIEND(ServiceListenerHook::ListenerInfo);

    ListenerInfo(ListenerInfoData* data);

    ExplicitlySharedDataPointer<ListenerInfoData> d;
  };

  virtual ~ServiceListenerHook();

  virtual void Added(const std::vector<ListenerInfo>& listeners) = 0;

  virtual void Removed(const std::vector<ListenerInfo>& listeners) = 0;

};

US_END_NAMESPACE

US_HASH_FUNCTION_NAMESPACE_BEGIN
US_HASH_FUNCTION_BEGIN(US_PREPEND_NAMESPACE(ServiceListenerHook::ListenerInfo))
  return US_HASH_FUNCTION(const US_PREPEND_NAMESPACE(ServiceListenerHook::ListenerInfoData)*, arg.d.Data());
US_HASH_FUNCTION_END
US_HASH_FUNCTION_NAMESPACE_END

#endif // USSERVICELISTENERHOOK_H