UniqueIdInterface.h

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// --------------------------------------------------------------------------
//                   OpenMS -- Open-Source Mass Spectrometry
// --------------------------------------------------------------------------
// Copyright The OpenMS Team -- Eberhard Karls University Tuebingen,
// ETH Zurich, and Freie Universitaet Berlin 2002-2012.
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// $Maintainer: Clemens Groepl $
// $Authors: $
// --------------------------------------------------------------------------

#ifndef OPENMS_CONCEPT_UNIQUEIDINTERFACE_H
#define OPENMS_CONCEPT_UNIQUEIDINTERFACE_H

#include <OpenMS/CONCEPT/UniqueIdGenerator.h>

namespace OpenMS
{

  class OPENMS_DLLAPI UniqueIdInterface
  {
public:

    enum
    {
      INVALID = 0
    };

    inline static bool
    isValid(UInt64 unique_id)
    {
      return unique_id != INVALID;
    }

    UniqueIdInterface() :
      unique_id_(UInt64(INVALID))
    {
      //do not use clearUniqueId(), as it will be slower and creates a warranted valgrind warning;
    }

    UniqueIdInterface(const UniqueIdInterface & rhs) :
      unique_id_(rhs.unique_id_)
    {
    }

    UniqueIdInterface &
    operator=(UniqueIdInterface const & rhs)
    {
      unique_id_ = rhs.unique_id_;
      return *this;
    }

    ~UniqueIdInterface()
    {
    }

    bool
    operator==(UniqueIdInterface const & rhs) const
    {
      return unique_id_ == rhs.unique_id_;
    }

    UInt64
    getUniqueId() const
    {
      return unique_id_;
    }

    Size
    clearUniqueId()
    {
      if (hasValidUniqueId())
      {
        unique_id_ = 0;
        return 1;
      }
      else
        return 0;
    }

    void
    swap(UniqueIdInterface & from)
    {
      std::swap(unique_id_, from.unique_id_);
      return;
    }

    Size
    hasValidUniqueId() const
    {
      return isValid(unique_id_);
    }

    Size
    hasInvalidUniqueId() const
    {
      return !isValid(unique_id_);
    }

    Size
    setUniqueId()
    {
      unique_id_ = UniqueIdGenerator::getUniqueId();
      return 1;
    }

    Size
    ensureUniqueId()
    {
      if (!hasValidUniqueId())
      {
        unique_id_ = UniqueIdGenerator::getUniqueId();
        return 1;
      }
      else
        return 0;
    }

    void
    setUniqueId(UInt64 rhs)
    {
      unique_id_ = rhs;
    }

    void
    setUniqueId(const String & rhs);

protected:
    UInt64 unique_id_;

  };

} //namespace OpenMS

#endif // OPENMS_CONCEPT_UNIQUEIDINTERFACE_H