handlers.hpp

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/*****************************************************************************
** Ifdefs
*****************************************************************************/

#ifndef ECL_ERRORS_HANDLERS_HPP_
#define ECL_ERRORS_HANDLERS_HPP_

/*****************************************************************************
** Includes
*****************************************************************************/

#include <ecl/config/macros.hpp>
#include <cstring>
#include <cstdio>
#include "macros.hpp"
#include "flags.hpp"

/*****************************************************************************
** Namespaces
*****************************************************************************/

namespace ecl {

class ECL_PUBLIC Error {
public:
        Error(const ErrorFlag& flag = UnknownError) : error_flag(flag) {}

        virtual ErrorFlag flag() const { return error_flag; }
        virtual void operator=(const ErrorFlag &error) { error_flag = error; }

//      virtual void debug(const char* loc) {
//              #if !defined(NDEBUG) && !defined(ECL_NDEBUG)
//                      printf("%s - %s\n",loc,what());
//              #endif
//      }

        virtual void print(const char* loc) {
                printf("%s - %s\n",loc,what());
        }

        virtual const char* what() const {
                switch (error_flag) {
                        case (NoError) : { return noErrorString(); }
                        case (OutOfRangeError) : { return outOfRangeErrorString(); }
                        case (ConstructorError) : { return constructorErrorString(); }
                        case (DestructorError) : { return destructorErrorString(); }
                        case (ConversionError) : { return conversionErrorString(); }
                        case (OpenError) : { return openErrorString(); }
                        case (CloseError) : { return closeErrorString(); }
                        case (InvalidArgError) : { return invalidArgErrorString(); }
                        case (ConfigurationError) : { return configurationErrorString(); }
                        case (ConnectionError) : { return connectErrorString(); }
                        case (ReadError) : { return readErrorString(); }
                        case (WriteError) : { return writeErrorString(); }
                        case (NotInitialisedError) : { return notInitialisedErrorString(); }
                        case (PermissionsError) : { return permissionsErrorString(); }
                        case (MemoryError) : { return memoryErrorString(); }
                        case (UsageError) : { return usageErrorString(); }
                        case (RaiiError) : { return raiiErrorString(); }
                        case (ArgNotSupportedError) : { return argNotSupportedErrorString(); }
                        case (NotSupportedError) : { return notSupportedErrorString(); }
                        case (BusyError) : { return busyErrorString(); }
                        case (OutOfResourcesError) : { return outOfResourcesErrorString(); }
                        case (InterruptedError) : { return interruptedErrorString(); }
                        case (BlockingError) : { return blockingErrorString(); }
                        case (SystemFailureError) : { return systemFailureErrorString(); }
                        case (InvalidObjectError) : { return invalidObjectErrorString(); }
                        case (IsLockedError) : { return isLockedErrorString(); }
                        case (TimeOutError) : { return isTimeOutErrorString(); }
                        case (NotFoundError) : { return notFoundErrorString(); }
                        case (ConnectionRefusedError) : { return connectionRefusedString(); }

                        default : { return unknownErrorString(); } // also covers the 'UnknownError flag.
                }
        }
protected:
        virtual const char* noErrorString() const { return "No error."; }
        virtual const char* outOfRangeErrorString() const { return "Out of range error - tried to access beyond the range of the object (usually container)."; }
        virtual const char* constructorErrorString() const { return "The constructor did not produce a valid object."; }
        virtual const char* destructorErrorString() const { return "The destructor failed to self destruct."; }
        virtual const char* conversionErrorString() const { return "Conversion from one type to another failed."; }
        virtual const char* openErrorString() const { return "Could not open the requested object."; }
        virtual const char* closeErrorString() const { return "Could not close the requested object."; }
        virtual const char* invalidArgErrorString() const { return "One of the supplied input arguments was invalid."; }
        virtual const char* configurationErrorString() const { return "There was a configuration error."; }
        virtual const char* connectErrorString() const { return "Could not connect."; }
        virtual const char* readErrorString() const { return "Could not read from the object."; }
        virtual const char* writeErrorString() const { return "Could not write to the object."; }
        virtual const char* notInitialisedErrorString() const { return "The object has not been properly initialised yet."; }
        virtual const char* permissionsErrorString() const { return "The caller does not have the required permissions."; }
        virtual const char* memoryErrorString() const { return "There was a problem allocating the requested memory."; }
        virtual const char* usageErrorString() const { return "The object was used incorrectly."; }
        virtual const char* raiiErrorString() const { return "The object is pure RAII style and must be initialised correctly, you may not use the default constructor."; }
        virtual const char* argNotSupportedErrorString() const { return "The combination of input arguments is not supported on this platform."; }
        virtual const char* notSupportedErrorString() const { return "This operation is not supported on this platform."; }
        virtual const char* busyErrorString() const { return "Resources are busy, operation is not permitted"; }
        virtual const char* outOfResourcesErrorString() const { return "Out of resources, cannot proceed."; }
        virtual const char* interruptedErrorString() const { return "This operation was interrupted."; }
        virtual const char* blockingErrorString() const { return "A device marked as blocking, but used as non-blocking, or vice versa."; }
        virtual const char* systemFailureErrorString() const { return "A subsystem has failed mid operation."; }
        virtual const char* invalidObjectErrorString() const { return "Attempted to work on an invalid object."; }
        virtual const char* isLockedErrorString() const { return "Invalidates attempts to work further because an object is locked."; }
        virtual const char* isTimeOutErrorString() const { return "A timeout occured."; }
        virtual const char* notFoundErrorString() const { return "The resource could not be found."; }
        virtual const char* connectionRefusedString() const { return "The connection was refused by the listener at the other end of the connection."; }
        virtual const char* unknownErrorString() const { return "Unknown error."; }

        ErrorFlag error_flag;
};


} // namespace ecl

#endif /* ECL_ERRORS_HANDLERS_HPP_ */