piorequest.h

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/*
 *   P::Classes - Portable C++ Application Framework
 *   Copyright (C) 2000-2004  Christian Prochnow <cproch@seculogix.de>
 *
 *   This library is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU Lesser General Public
 *   License as published by the Free Software Foundation; either
 *   version 2 of the License, or (at your option) any later version.
 *
 *   This library is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *   Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public
 *   License along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef _piorequest_h_
#define _piorequest_h_

#include <pclasses/pexport.h>
#include <pclasses/ptypes.h>
#include <pclasses/pexception.h>
#include <pclasses/psemaphore.h>
#include <pclasses/purl.h>
#include <string>
#include <map>


namespace P {

class IOHandler;
class IOManager;


class PIO_EXPORT IORequest {
  public:
  
    enum state_t {
      Initial,     
      Open,        
      Transfer,    
      Finished,    
      Failed       
    };

    friend class IOManager;
    friend class IOHandler;


    IORequest(IOHandler* handler, const URL& url);
    virtual ~IORequest();

    inline IOHandler* handler() const throw()
    { return m_handler; }

    inline const URL& url() const throw()
    { return m_url; }

    inline state_t state() const throw()
    { return m_state; }

  protected:
    inline void setState(state_t s) throw()
    { m_state = s; }

  private:
    IORequest(const IORequest&);
    IORequest& operator=(const IORequest&);

    IOHandler*    m_handler;
    URL           m_url;
    state_t       m_state;

  public:


    class PIO_EXPORT Error: public RuntimeError {
      public:
        Error(const char* what, const std::string& text,
              const SourceInfo& si) throw();

        ~Error() throw();

        inline BaseError* clone() const
        { return new Error(*this); }

        inline const std::string& text() const
        { return m_text; }

      private:
        std::string m_text;
    };
};


class PIO_EXPORT IORequest_Get: public IORequest {
  public:
    IORequest_Get(IOHandler* handler, const URL& url);
    virtual ~IORequest_Get();


    virtual void open() = 0;
    

    virtual void close() = 0;


    virtual size_t receive(char* buff, size_t count) = 0;
};


class PIO_EXPORT IORequest_Put: public IORequest {
  public:
    IORequest_Put(IOHandler* handler, const URL& url);
    virtual ~IORequest_Put();


    virtual void open() = 0;
    

    virtual void close() = 0;


    virtual size_t send(const char* buff, size_t count) = 0;
};


class PIO_EXPORT IORequest_Unlink: public IORequest {
  public:
    IORequest_Unlink(IOHandler* handler, const URL& url);
    virtual ~IORequest_Unlink();

    virtual void unlink() = 0;
};


class PIO_EXPORT IORequest_MakeDir: public IORequest {
  public:
    IORequest_MakeDir(IOHandler* handler, const URL& url);
    virtual ~IORequest_MakeDir();

    virtual void mkdir() = 0;
};


class PIO_EXPORT IORequest_RemoveDir: public IORequest {
  public:
    IORequest_RemoveDir(IOHandler* handler, const URL& url);
    virtual ~IORequest_RemoveDir();

    virtual void rmdir() = 0;
};


class PIO_EXPORT IORequest_ListDir: public IORequest {
  public:
    IORequest_ListDir(IOHandler* handler, const URL& url);
    virtual ~IORequest_ListDir();

    virtual void list() = 0;
};

}

#endif

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