CollectionRegistry.cpp

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#include "CollectionRegistry.h"
#include "Keywords.h"
#include <strutil.h>
#include <cassert>
 
using namespace BPMNOS;
 
CollectionRegistry::CollectionRegistry() {
  // register empty collection with index 0
  (*this)(std::vector<double>());
}
 
const std::vector<double>&  CollectionRegistry::operator[](size_t i) const {
  assert( i < registeredCollections.size() );
  std::shared_lock read_lock(registryMutex);
  return registeredCollections[i];
}
 
size_t CollectionRegistry::operator()(const std::vector<double>& collection) {
  std::shared_lock read_lock(registryMutex);
  if ( auto it = index.find(collection);
    it != index.end()
  ) {
    return it->second;
  }
  read_lock.unlock();  
 
  std::unique_lock write_lock(registryMutex);
  auto [it, inserted] = index.try_emplace(collection, index.size());
 
  if ( !inserted ) {
    assert( index.size() == registeredCollections.size() );
    return it->second;
  }
 
  registeredCollections.push_back(collection);
 
  assert( index.size() == registeredCollections.size() );
  return registeredCollections.size()-1;
}
 
size_t CollectionRegistry::size() const {
  std::shared_lock read_lock(registryMutex);
  return registeredCollections.size();
}
 
void CollectionRegistry::clear() {
  std::unique_lock write_lock(registryMutex);
  index.clear();
  registeredCollections.clear();
 
  index.emplace(std::vector<double>(),0);  
  registeredCollections.push_back(std::vector<double>());
  
  assert( index.size() == registeredCollections.size() );
}
 
// Create global registry
CollectionRegistry collectionRegistry = CollectionRegistry();