Map.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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// $Maintainer: Stephan Aiche$
// $Authors: Marc Sturm $
// --------------------------------------------------------------------------

#ifndef OPENMS_DATASTRUCTURES_MAP_H
#define OPENMS_DATASTRUCTURES_MAP_H

#include <OpenMS/CONCEPT/Exception.h>

#include <map>

namespace OpenMS
{
  template <class Key, class T>
  class Map :
    public std::map<Key, T>
  {
public:

    class IllegalKey :
      public Exception::BaseException
    {
public:
      IllegalKey(const char * file, int line, const char * function) :
        Exception::BaseException(file, line, function)
      {
      }

    };


    typedef std::map<Key, T> Base;
    typedef typename Base::value_type ValueType;
    typedef Key KeyType;
    typedef typename Base::value_type * PointerType;
    typedef typename Base::iterator Iterator;
    typedef typename Base::const_iterator ConstIterator;
    typedef typename Base::reverse_iterator ReverseIterator;
    typedef typename Base::const_reverse_iterator ConstReverseIterator;

    inline bool has(const Key & key) const
    {
      return Base::find(key) != Base::end();
    }

    const T & operator[](const Key & key) const;

    T & operator[](const Key & key);
  };

  //******************************************************************************************
  // Implementations of template methods
  //******************************************************************************************

  template <class Key, class T>
  const T & Map<Key, T>::operator[](const Key & key) const
  {
    ConstIterator it = this->find(key);
    if (it == Base::end())
    {
      throw IllegalKey(__FILE__, __LINE__, __PRETTY_FUNCTION__);
    }
    else
    {
      return it->second;
    }
  }

  template <class Key, class T>
  T & Map<Key, T>::operator[](const Key & key)
  {
    Iterator it = this->find(key);
    if (it == Base::end())
    {
      it = this->insert(ValueType(key, T())).first;
    }
    return it->second;
  }

} // namespace OPENMS

#endif // OPENMS_DATASTRUCTURES_MAP_H