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/* -*- C++ -*- */
//=============================================================================
/**
* @file URL_Visitor_Factory.h
*
* @author Douglas C. Schmidt <schmidt@cs.wustl.edu>
*/
//=============================================================================
#ifndef _URL_VISITOR_FACTORY_H
#define _URL_VISITOR_FACTORY_H
#include "URL_Visitor.h"
#include "Command_Processor.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
#pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
/**
* @class URL_Visitor_Factory
*
* @brief Abstract base class that creates URL visitors.
*
* Subclasses define each of the Factory Methods to
* make the right objects, which all "vary" together.
*/
class URL_Visitor_Factory
{
public:
/// Destructor.
virtual ~URL_Visitor_Factory (void);
/// Factory Method that makes the appropriate type of <URL_Visitor>.
virtual URL_Visitor *make_visitor (void) = 0;
/// Factory Method that makes the appropriate type of
/// <Command_Processor>.
virtual Command_Processor *make_command_processor (void) = 0;
};
/**
* @class URL_Validation_Visitor_Factory
*
* @brief Create a URL visitor that validates URL links.
*/
class URL_Validation_Visitor_Factory : public URL_Visitor_Factory
{
public:
/// Factory Method that makes a <URL_Validation_Visitor>.
virtual URL_Visitor *make_visitor (void);
/// Factory Method that makes a <FIFO_Command_Processor>.
virtual Command_Processor *make_command_processor (void);
};
/**
* @class URL_Download_Visitor_Factory
*
* @brief Create a URL visitor that downloads URL links.
*/
class URL_Download_Visitor_Factory : public URL_Visitor_Factory
{
public:
/// Factory Method that makes a <URL_Download_Visitor>.
virtual URL_Visitor *make_visitor (void);
/// Factory Method that makes a <FIFO_Command_Processor>.
virtual Command_Processor *make_command_processor (void);
};
#endif /* _URL_VISITOR_FACTORY_H */
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