Vertex.hh

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/*
 * Copyright (C) 2017 Open Source Robotics Foundation
 *
 * 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 IGNITION_MATH_GRAPH_VERTEX_HH_
#define IGNITION_MATH_GRAPH_VERTEX_HH_

// uint64_t
#include <cstdint>
#include <functional>
#include <iostream>
#include <map>
#include <string>
#include <utility>

#include <ignition/math/config.hh>
#include <ignition/math/Helpers.hh>

namespace ignition
{
namespace math
{
// Inline bracket to help doxygen filtering.
inline namespace IGNITION_MATH_VERSION_NAMESPACE {
namespace graph
{
  using VertexId = uint64_t;

  using VertexId_P = std::pair<VertexId, VertexId>;

  static const VertexId kNullId = MAX_UI64;

  template<typename V>
  class Vertex
  {
    public: static Vertex<V> NullVertex;

    public: Vertex(const std::string &_name,
                   const V &_data = V(),
                   const VertexId _id = kNullId)
      : name(_name),
        data(_data),
        id(_id)
    {
    }

    public: const V &Data() const
    {
      return this->data;
    }

    public: V &Data()
    {
      return this->data;
    }

    public: VertexId Id() const
    {
      return this->id;
    }

    public: const std::string &Name() const
    {
      return this->name;
    }

    public: void SetName(const std::string &_name)
    {
      this->name = _name;
    }

    public: bool Valid() const
    {
      return this->id != kNullId;
    }

    public: friend std::ostream &operator<<(std::ostream &_out,
                                            const Vertex<V> &_v)
    {
      _out << "  " << _v.Id() << " [label=\"" << _v.Name()
           << " (" << _v.Id() << ")\"];" << std::endl;
      return _out;
    }

    private: std::string name = "";

    private: V data;

    private: VertexId id = kNullId;
  };

  template<typename V>
  Vertex<V> Vertex<V>::NullVertex("__null__", V(), kNullId);

  template<typename V>
  using VertexRef_M =
    std::map<VertexId, std::reference_wrapper<const Vertex<V>>>;
}
}
}
}
#endif