/src/poco/Foundation/include/Poco/Exception.h

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//
// Exception.h
//
// Library: Foundation
// Package: Core
// Module:  Exception
//
// Definition of various Poco exception classes.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//


#ifndef Foundation_Exception_INCLUDED
#define Foundation_Exception_INCLUDED


#include "Poco/Foundation.h"
#include <stdexcept>


namespace Poco {


class Foundation_API Exception: public std::exception
  /// This is the base class for all exceptions defined
  /// in the Poco class library.
{
public:
  Exception(const std::string& msg, int code = 0);
    /// Creates an exception.

  Exception(const std::string& msg, const std::string& arg, int code = 0);
    /// Creates an exception.

  Exception(const std::string& msg, const Exception& nested, int code = 0);
    /// Creates an exception and stores a clone
    /// of the nested exception.

  Exception(const Exception& exc);
    /// Copy constructor.

  ~Exception() noexcept override;
    /// Destroys the exception and deletes the nested exception.

  Exception& operator = (const Exception& exc);
    /// Assignment operator.

  virtual const char* name() const noexcept;
    /// Returns a static string describing the exception.

  virtual const char* className() const noexcept;
    /// Returns the name of the exception class.

  const char* what() const noexcept override;
    /// Returns a static string describing the exception.
    ///
    /// Same as name(), but for compatibility with std::exception.

  const Exception* nested() const;
    /// Returns a pointer to the nested exception, or
    /// null if no nested exception exists.

  const std::string& message() const;
    /// Returns the message text.

  int code() const;
    /// Returns the exception code if defined.

  std::string displayText() const;
    /// Returns a string consisting of the
    /// message name and the message text.

  virtual Exception* clone() const;
    /// Creates an exact copy of the exception.
    ///
    /// The copy can later be thrown again by
    /// invoking rethrow() on it.

  virtual void rethrow() const;
    /// (Re)Throws the exception.
    ///
    /// This is useful for temporarily storing a
    /// copy of an exception (see clone()), then
    /// throwing it again.

protected:
  Exception(int code = 0);
    /// Standard constructor.

  void message(const std::string& msg);
    /// Sets the message for the exception.

  void extendedMessage(const std::string& arg);
    /// Sets the extended message for the exception.

private:
  std::string _msg;
  Exception*  _pNested;
  int     _code;
};

#if defined(_HAS_EXCEPTIONS)
  // Size of Poco::Exception depends on the exception settings (like _HAS_EXCEPTIONS)
  // that might influence size of std::exception from which Poco::Exception is derived from.
  // It is expected that Poco libraries and application using Poco have the same settings.
  static_assert(_HAS_EXCEPTIONS != 0);
#endif

//
// inlines
//
inline const Exception* Exception::nested() const
{
  return _pNested;
}


inline const std::string& Exception::message() const
{
  return _msg;
}


inline void Exception::message(const std::string& msg)
{
  _msg = msg;
}


inline int Exception::code() const
{
  return _code;
}


//
// Macros for quickly declaring and implementing exception classes.
// Unfortunately, we cannot use a template here because character
// pointers (which we need for specifying the exception name)
// are not allowed as template arguments.
//
#define POCO_DECLARE_EXCEPTION_CODE(API, CLS, BASE, CODE) \
  class API CLS: public BASE                            \
  {                                       \
  public:                                     \
    CLS(int code = CODE);                           \
    CLS(const std::string& msg, int code = CODE);               \
    CLS(const std::string& msg, const std::string& arg, int code = CODE);   \
    CLS(const std::string& msg, const Poco::Exception& exc, int code = CODE); \
    CLS(const CLS& exc);                            \
    ~CLS() noexcept;                                \
    CLS& operator = (const CLS& exc);                     \
    const char* name() const noexcept;                      \
    const char* className() const noexcept;                   \
    Poco::Exception* clone() const;                       \
    void rethrow() const;                           \
  };

#define POCO_DECLARE_EXCEPTION(API, CLS, BASE) \
  POCO_DECLARE_EXCEPTION_CODE(API, CLS, BASE, 0)

#define POCO_IMPLEMENT_EXCEPTION(CLS, BASE, NAME)                         \
  CLS::CLS(int code): BASE(code)                                  \
  {                                               \
  }                                                \
  CLS::CLS(const std::string& msg, int code): BASE(msg, code)                    \
  {                                               \
  }                                                \
  CLS::CLS(const std::string& msg, const std::string& arg, int code): BASE(msg, arg, code)    \
  {                                               \
  }                                                \
  CLS::CLS(const std::string& msg, const Poco::Exception& exc, int code): BASE(msg, exc, code)  \
  {                                               \
  }                                                \
  CLS::CLS(const CLS& exc): BASE(exc)                                \
  {                                               \
  }                                                \
  CLS::~CLS() noexcept                                      \
  {                                               \
  }                                                \
  CLS& CLS::operator = (const CLS& exc)                             \
  {                                               \
    BASE::operator = (exc);                                   \
    return *this;                                       \
  }                                                \
  const char* CLS::name() const noexcept                              \
  {                                               \
    return NAME;                                        \
  }                                                \
  const char* CLS::className() const noexcept                           \
  {                                               \
    return typeid(*this).name();                                \
  }                                                \
  Poco::Exception* CLS::clone() const                               \
  {                                               \
    return new CLS(*this);                                    \
  }                                                \
  void CLS::rethrow() const                                   \
  {                                               \
    throw *this;                                        \
  }


//
// Standard exception classes
//
POCO_DECLARE_EXCEPTION(Foundation_API, LogicException, Exception)
POCO_DECLARE_EXCEPTION(Foundation_API, AssertionViolationException, LogicException)
POCO_DECLARE_EXCEPTION(Foundation_API, NullPointerException, LogicException)
POCO_DECLARE_EXCEPTION(Foundation_API, NullValueException, LogicException)
POCO_DECLARE_EXCEPTION(Foundation_API, BugcheckException, LogicException)
POCO_DECLARE_EXCEPTION(Foundation_API, InvalidArgumentException, LogicException)
POCO_DECLARE_EXCEPTION(Foundation_API, NotImplementedException, LogicException)
POCO_DECLARE_EXCEPTION(Foundation_API, RangeException, LogicException)
POCO_DECLARE_EXCEPTION(Foundation_API, IllegalStateException, LogicException)
POCO_DECLARE_EXCEPTION(Foundation_API, InvalidAccessException, LogicException)
POCO_DECLARE_EXCEPTION(Foundation_API, SignalException, LogicException)
POCO_DECLARE_EXCEPTION(Foundation_API, UnhandledException, LogicException)

POCO_DECLARE_EXCEPTION(Foundation_API, RuntimeException, Exception)
POCO_DECLARE_EXCEPTION(Foundation_API, NotFoundException, RuntimeException)
POCO_DECLARE_EXCEPTION(Foundation_API, ExistsException, RuntimeException)
POCO_DECLARE_EXCEPTION(Foundation_API, TimeoutException, RuntimeException)
POCO_DECLARE_EXCEPTION(Foundation_API, SystemException, RuntimeException)
POCO_DECLARE_EXCEPTION(Foundation_API, RegularExpressionException, RuntimeException)
POCO_DECLARE_EXCEPTION(Foundation_API, LibraryLoadException, RuntimeException)
POCO_DECLARE_EXCEPTION(Foundation_API, LibraryAlreadyLoadedException, RuntimeException)
POCO_DECLARE_EXCEPTION(Foundation_API, NoThreadAvailableException, RuntimeException)
POCO_DECLARE_EXCEPTION(Foundation_API, PropertyNotSupportedException, RuntimeException)
POCO_DECLARE_EXCEPTION(Foundation_API, PoolOverflowException, RuntimeException)
POCO_DECLARE_EXCEPTION(Foundation_API, NoPermissionException, RuntimeException)
POCO_DECLARE_EXCEPTION(Foundation_API, OutOfMemoryException, RuntimeException)
POCO_DECLARE_EXCEPTION(Foundation_API, ResourceLimitException, RuntimeException)
POCO_DECLARE_EXCEPTION(Foundation_API, DataException, RuntimeException)

POCO_DECLARE_EXCEPTION(Foundation_API, DataFormatException, DataException)
POCO_DECLARE_EXCEPTION(Foundation_API, SyntaxException, DataException)
POCO_DECLARE_EXCEPTION(Foundation_API, CircularReferenceException, DataException)
POCO_DECLARE_EXCEPTION(Foundation_API, PathSyntaxException, SyntaxException)
POCO_DECLARE_EXCEPTION(Foundation_API, IOException, RuntimeException)
POCO_DECLARE_EXCEPTION(Foundation_API, ProtocolException, IOException)
POCO_DECLARE_EXCEPTION(Foundation_API, FileException, IOException)
POCO_DECLARE_EXCEPTION(Foundation_API, FileExistsException, FileException)
POCO_DECLARE_EXCEPTION(Foundation_API, FileNotFoundException, FileException)
POCO_DECLARE_EXCEPTION(Foundation_API, PathNotFoundException, FileException)
POCO_DECLARE_EXCEPTION(Foundation_API, FileReadOnlyException, FileException)
POCO_DECLARE_EXCEPTION(Foundation_API, FileAccessDeniedException, FileException)
POCO_DECLARE_EXCEPTION(Foundation_API, CreateFileException, FileException)
POCO_DECLARE_EXCEPTION(Foundation_API, OpenFileException, FileException)
POCO_DECLARE_EXCEPTION(Foundation_API, WriteFileException, FileException)
POCO_DECLARE_EXCEPTION(Foundation_API, ReadFileException, FileException)
POCO_DECLARE_EXCEPTION(Foundation_API, ExecuteFileException, FileException)
POCO_DECLARE_EXCEPTION(Foundation_API, FileNotReadyException, FileException)
POCO_DECLARE_EXCEPTION(Foundation_API, DirectoryNotEmptyException, FileException)
POCO_DECLARE_EXCEPTION(Foundation_API, UnknownURISchemeException, RuntimeException)
POCO_DECLARE_EXCEPTION(Foundation_API, TooManyURIRedirectsException, RuntimeException)
POCO_DECLARE_EXCEPTION(Foundation_API, URISyntaxException, SyntaxException)

POCO_DECLARE_EXCEPTION(Foundation_API, ApplicationException, Exception)
POCO_DECLARE_EXCEPTION(Foundation_API, BadCastException, RuntimeException)


} // namespace Poco


#endif // Foundation_Exception_INCLUDED

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Created: 2025-08-28 07:02