/**
 * state.h
 * Implemented by Blueprint Technologies, Inc.
 */

#ifndef _state_h
#define _state_h

/**
 * Defines an interface for encapsulating the behavior
 * associated with a particular state of the Context.
 */

class State
{

public:
	virtual void handle() = 0;

};

/**
 * Each subclass implements a behavior associated
 * with a state of the Context.
 */

class ConcreteStateA: public State
{

public:
	virtual void handle()
	{
	};

};

/**
 * Each subclass implements a behavior associated
 * with a state of the Context.
 */

class ConcreteStateB: public State
{

public:
	virtual void handle()
	{
	};

};

/**
 * Defines the interface of interest to clients. Maintains
 * an instance of a ConcreteState subclass that defines the
 * current state.
 */

class Context
{

private:
	State* state;

public:
	Context(): state(0)
	{
	};

	void request()
	{
		if( state )
		{
			state -> handle();
		}
	};

	State* getState()
	{
		return state;
	};

	void setState( State* state )
	{
		this -> state = state;
	};

};

#endif