PropertiesT_impl.hh

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#define PROPERTIES_C

#include <cassert>
#include <utility>
#include <iostream>


//-----------------------------------------------------------------------------

template<typename T>
bool Properties::add_property(PropertyHandleT<T> &_hProp, std::string _name)
{
  // return the property if it exists
  if(get_property(_hProp, _name))
    return false;

  // create it if not
  // find the first free entry
  std::vector<BaseProperty*>::iterator it;
  for(it = properties_.begin(); it != properties_.end(); ++it)
    if(*it == 0)
      break;

  if(it == properties_.end())   // found a free entry?
  {
    // append at the end
    _hProp.idx_ = properties_.size();
    property_names_.insert( std::pair<std::string, int>(_name, properties_.size()) );
    properties_.push_back(dynamic_cast<BaseProperty*>(new PropertyT<T>(size_)));                // the new one needs to have the same number of entries, to keep the correspondence
  }else{
    // insert in the free spot
    _hProp.idx_ = it - properties_.begin();
    property_names_.insert( std::pair<std::string, int>(_name, _hProp.idx_) );
    *it = new PropertyT<T>(size_);
  }
  return true;
}

//-----------------------------------------------------------------------------

template<typename T>
bool Properties::get_property(PropertyHandleT<T> &_hProp, std::string _name)
{
  // find the name
  std::map<std::string, int>::iterator f = property_names_.find(_name);
  if(f == property_names_.end())
    return false;

  // return the index
  _hProp.idx_ = f->second;
        assert(properties_[_hProp.idx_] != 0);
  return true;
}

//-----------------------------------------------------------------------------

template<typename T>
bool Properties::remove_property(PropertyHandleT<T> &_hProp)
{
  if(!_hProp.isValid())
    return false;
  assert(_hProp.idx_ < (int)properties_.size());
  assert(properties_[_hProp.idx_] != 0);

  // delete the property
  delete properties_[_hProp.idx_];
  properties_[_hProp.idx_] = 0;

  // find the names entry and delete it
  for(std::map<std::string, int>::iterator it = property_names_.begin(); it != property_names_.end(); ++it)
  {
    if(it->second == _hProp.idx_)
    {
      property_names_.erase(it);
      break;
    }
  }

  // invalidate the handle
  _hProp.idx_ = -1;

  return true;
}

//-----------------------------------------------------------------------------

template<typename T>
T &Properties::property(PropertyHandleT<T> &_hProp, int _index)
{
  assert(_hProp.idx_ >= 0 && _hProp.idx_ < (int)properties_.size());
  assert(properties_[_hProp.idx_] != 0);
  assert(reinterpret_cast< PropertyT<T>* >(properties_[_hProp.idx_]) != 0);

  return (*reinterpret_cast< PropertyT<T>* >(properties_[_hProp.idx_]))[_index];
}

//-----------------------------------------------------------------------------
//   PropertyHandleT
//-----------------------------------------------------------------------------

template<typename T>
PropertyHandleT<T>::PropertyHandleT(int _idx) :
  idx_(_idx)
{
}

//-----------------------------------------------------------------------------

template<typename T>
PropertyHandleT<T>::~PropertyHandleT()
{
}

//-----------------------------------------------------------------------------

template<typename T>
bool PropertyHandleT<T>::isValid()
{
  return idx_ >= 0;
}

//-----------------------------------------------------------------------------
//       PropertyT
//-----------------------------------------------------------------------------

template<typename T>
Properties::PropertyT<T>::PropertyT(unsigned long _size)
{
  for(unsigned long i = 0; i < _size; ++i)
    values_.push_back(T());
}

//-----------------------------------------------------------------------------

template<typename T>
Properties::PropertyT<T>::~PropertyT()
{
}

//-----------------------------------------------------------------------------

template<typename T>
T &Properties::PropertyT<T>::operator[](int _index)
{
  assert(_index >= 0 && _index < (int)values_.size());

  return values_[_index];
}

//-----------------------------------------------------------------------------

template<typename T>
void Properties::PropertyT<T>::insert_at(int _index)
{
  assert(_index >= 0 && _index <= (int)values_.size());

  values_.insert(values_.begin() + _index, T());
}

//-----------------------------------------------------------------------------

template<typename T>
void Properties::PropertyT<T>::remove_at(int _index)
{
  assert(_index >= 0 && _index < (int)values_.size());

  values_.erase(values_.begin() + _index);
}

//-----------------------------------------------------------------------------

template<typename T>
void Properties::PropertyT<T>::clear()
{
  values_.clear();
}

//-----------------------------------------------------------------------------