ContainedObject.h

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#ifndef GAUDIKERNEL_CONTAINEDOBJECT_H
#define GAUDIKERNEL_CONTAINEDOBJECT_H

// Include files
#include "GaudiKernel/Kernel.h"
#include "GaudiKernel/ObjectContainerBase.h"
#include "GaudiKernel/StreamBuffer.h"
#include <iostream>

// Forward declarations
template <class TYPE>
class ObjectVector;
template <class TYPE>
class ObjectList;

// Typedefs
typedef ObjectVector<ContainedObject> ContainedObjectVector;
typedef ObjectList<ContainedObject>   ContainedObjectList;

// Definition of the CLID for this class
static const CLID CLID_ContainedObject = 190;

class GAUDI_API ContainedObject
{

  friend class ObjectVector<ContainedObject>;
  friend class ObjectList<ContainedObject>;

protected:
  ContainedObject() = default;
  ContainedObject( const ContainedObject& ) : ContainedObject() {}
  virtual ~ContainedObject();

public:
  virtual const CLID& clID() const { return classID(); }
  static const CLID&  classID() { return CLID_ContainedObject; }

  const ObjectContainerBase* parent() const { return m_parent; }
  void setParent( ObjectContainerBase* value ) { m_parent = value; }

  virtual long index() const { return m_parent ? m_parent->index( this ) : -1; }
  virtual StreamBuffer& serialize( StreamBuffer& s ) const { return s; }
  virtual StreamBuffer& serialize( StreamBuffer& s ) { return s; }
  virtual std::ostream& fillStream( std::ostream& s ) const { return s; }
  friend std::ostream& operator<<( std::ostream& s, const ContainedObject& obj ) { return obj.fillStream( s ); }

private:
  ObjectContainerBase* m_parent = nullptr;
};

#endif // GAUDIKERNEL_CONTAINEDOBJECT_H