duck.hpp

来自「深入浅出设计模式（书配套c++源代码)。包含20个设计模式的c++实现。」· HPP 代码 · 共 45 行

#ifndef	_HFDP_CPP_INTERPRETER_DUCK_HPP_
#define _HFDP_CPP_INTERPRETER_DUCK_HPP_

#include "MiniDuckSimulator.hpp"

namespace HeadFirstDesignPatterns {
namespace Interpreter {
namespace MiniDuckSimulator {

class Duck {

	private: std::auto_ptr< FlyBehavior > _flyBehavior;
	private: std::auto_ptr< QuackBehavior > _quackBehavior;

	private: Duck( const Duck& ); // Disable copy constructor
	private: void operator=( const Duck& ); // Disable assignment operator

	protected: Duck( FlyBehavior* flyBehavior, QuackBehavior* quackBehavior ) :
		_flyBehavior( flyBehavior ), _quackBehavior( quackBehavior ) { assert( flyBehavior ); assert( quackBehavior );
	}
	public: virtual ~Duck() = 0 {
	}
	public:	void setFlyBehavior( FlyBehavior* fb ) { assert( fb );
		_flyBehavior = std::auto_ptr< FlyBehavior >( fb );
	}
	public: void setQuackBehavior( QuackBehavior* qb ) { assert( qb );
		_quackBehavior = std::auto_ptr< QuackBehavior >( qb );
	}
	public: void fly() const {
		_flyBehavior->fly();
	}
	public: void quack() const {
		_quackBehavior->quack();
	}
	public: void swim() const {
		std::cout << "All ducks float, even decoys!" << std::endl;
	}
	public: virtual void display() const = 0;
};

} // namespace MiniDuckSimulator
} // namespace Interpreter
} // namespace HeadFirstDesignPatterns

#endif