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exception.h

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/**************************************************************************
 Copyright (c) 2000-2001, Tony Garnock-Jones
 All rights reserved.

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 modification, are permitted provided that the following conditions are
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     * Redistributions of source code must retain the above copyright
       notice, this list of conditions and the following disclaimer.

     * Redistributions in binary form must reproduce the above
       copyright notice, this list of conditions and the following
       disclaimer in the documentation and/or other materials provided
       with the distribution.

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       software's contributors may be used to endorse or promote
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       written permission.

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/* -*- c++ -*- */
#ifndef MPS_Exception_H
#define MPS_Exception_H

#include <exception>

namespace MPS {

/**
 * Base class for most exceptions thrown by MPS. */
class MPSException: public std::exception {
private:
  string _message;      ///< Message explaining the exception condition.
public:
  MPSException() {}
  MPSException(string const &message)
    : _message(message)
  {}

  string const &getMessage() const { return _message; }
  char const *what() const { return _message.c_str(); }
};

/**
 * Superclass of all exceptions throwable by MPS interface
 * implementations. */
class UserException: public MPSException {
public:
  UserException()
    : MPSException("UserException thrown")
  {}
};

/**
 * Thrown when reading from a closed Connection or a too-short
 * InputStream. */
class MPSConnectionClosedException: public MPSException {
public:
  MPSConnectionClosedException() {}
  MPSConnectionClosedException(string const &when)
    : MPSException("Connection closed: " + when)
  {}
};

}

#endif

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