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

  Program:   Visualization Toolkit
  Module:    vtkInformationKeyLookup.cxx

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

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

#include "vtkInformationKeyLookup.h"

#include "vtkInformationKey.h"
#include "vtkObjectFactory.h"

vtkStandardNewMacro(vtkInformationKeyLookup);

//------------------------------------------------------------------------------
void vtkInformationKeyLookup::PrintSelf(std::ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os, indent);
  os << indent << "Registered Keys:\n";
  indent = indent.GetNextIndent();
  KeyMap& keys = Keys();
  for (KeyMap::iterator i = keys.begin(), iEnd = keys.end(); i != iEnd; ++i)
  {
    os << indent << i->first.first << "::" << i->first.second << " @" << i->second << " ("
       << i->second->GetClassName() << ")\n";
  }
}

//------------------------------------------------------------------------------
vtkInformationKey* vtkInformationKeyLookup::Find(
  const std::string& name, const std::string& location)
{
  KeyMap& keys = Keys();
  KeyMap::iterator it = keys.find(std::make_pair(location, name));
  return it != keys.end() ? it->second : nullptr;
}

//------------------------------------------------------------------------------
vtkInformationKeyLookup::vtkInformationKeyLookup() = default;

//------------------------------------------------------------------------------
// Keys are owned / cleaned up by the vtk*InformationKeyManagers.
vtkInformationKeyLookup::~vtkInformationKeyLookup() = default;

//------------------------------------------------------------------------------
void vtkInformationKeyLookup::RegisterKey(
  vtkInformationKey* key, const std::string& name, const std::string& location)
{
  vtkInformationKeyLookup::Keys().insert(std::make_pair(std::make_pair(location, name), key));
}

//------------------------------------------------------------------------------
vtkInformationKeyLookup::KeyMap& vtkInformationKeyLookup::Keys()
{
  // Ensure that the map is initialized before using from other static
  // initializations:
  static vtkInformationKeyLookup::KeyMap keys;
  return keys;
}