particles_factory_interface.hh
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	#ifndef __PARTICLES_FACTORY_INTERFACE__HH__
	#define __PARTICLES_FACTORY_INTERFACE__HH__

	/* -------------------------------------------------------------------------- */
	#include "system_evolution.hh"
	/* -------------------------------------------------------------------------- */

	//! Abstract factory defining interface
	class ParticlesFactoryInterface {
	// Constructors/Destructors
	protected:
	//! Instance constructor (protected)
	ParticlesFactoryInterface() = default;

	public:
	virtual ~ParticlesFactoryInterface() = default;

	// Methods
	public:
	//! Create a whole simulation from file
	virtual SystemEvolution& createSimulation(const std::string& fname,
	Real timestep) = 0;
	//! Create a new particle
	virtual std::unique_ptr<Particle> createParticle() = 0;

	//! Get singleton instance
	static ParticlesFactoryInterface& getInstance();

	// Members
	protected:
	std::vector<Particle*> list_particles;
	std::unique_ptr<SystemEvolution> system_evolution = nullptr;

	// Standard pointer because constructor is protected (cannot use make_unique)
	static ParticlesFactoryInterface* factory;
	};

	/* -------------------------------------------------------------------------- */
	#endif //__PARTICLES_FACTORY_INTERFACE__HH__