/**
A class for complex numbers.
C.A. Bertulani 06/12/2000
 */

#ifndef _EXCEPTIONS_H_
#define _EXCEPTIONS_H_

#include <iostream.h>

class Exception {
  //  prints the exception message to the output stream
  friend ostream& operator<<( ostream& outStream, const Exception& exception) {
    outStream << exception.exceptionType_ << ": " << exception.message_;
    return outStream;
  }
 public:
  // creates a general exception with the given message
  Exception( const char* message) : message_(message), exceptionType_( "General Exception"){}

 protected:
  // used by subclasses to "personize" themselves.
  Exception( const char* message, const char* type) : message_(message), exceptionType_( type){}
  
  const char* exceptionType_;
  const char* message_;
};

class OutOfRangeException : public Exception {
 public:
  OutOfRangeException( const char* message) : Exception( message, "Value Out of Range") {}
};

class IO_Exception : public Exception {
 public:
  IO_Exception( const char* message) : Exception( message, "IO Failure") {}
};

class UnexpectedNullException : public Exception {
 public:
  UnexpectedNullException( const char* message) : Exception( message, "Unexpected Null Value") {}
};


#endif // ends exceptions.h