wiscdb::InvalidPageException Class Reference

An exception that is thrown when an attempt is made to access an invalid page in a file. More...

#include <invalid_page_exception.h>

Inheritance diagram for wiscdb::InvalidPageException:

Public Member Functions
	InvalidPageException (const PageId requested_number, const std::string &file)
virtual	~InvalidPageException () throw ()
virtual PageId	page_number () const
virtual const std::string &	filename () const
virtual const std::string &	message () const
virtual const char *	what () const throw ()

Protected Attributes
const PageId	page_number_
const std::string	filename_
std::string	message_

Detailed Description

An exception that is thrown when an attempt is made to access an invalid page in a file.

Pages are considered invalid if they have not yet been allocated (an ID off the end of the file) or if they have been deleted and not yet re-allocated.

Definition at line 24 of file invalid_page_exception.h.

Constructor & Destructor Documentation

wiscdb::InvalidPageException::InvalidPageException	(	const PageId	requested_number,
		const std::string &	file
	)

Constructs an invalid page exception for the given requested page number and filename.

Parameters

requested_number	Requested page number.
file	Name of file that request was made to.

Definition at line 15 of file invalid_page_exception.cpp.

    : WiscDbException(""),
      page_number_(requested_number),
      filename_(file) {
  std::stringstream ss;
  ss << "Request made for an invalid page."
     << " Requested page " << page_number_
     << " from file '" << filename_ << "'";
  message_.assign(ss.str());
}

virtual wiscdb::InvalidPageException::~InvalidPageException ( ) throw ( )

inlinevirtual

Destroys the exception. Does nothing special; just included to make the compiler happy.

Definition at line 40 of file invalid_page_exception.h.

{}

Member Function Documentation

virtual const std::string& wiscdb::InvalidPageException::filename ( ) const

inlinevirtual

Returns name of the file that caused this exception.

Definition at line 50 of file invalid_page_exception.h.

{ return filename_; }

virtual const std::string& wiscdb::WiscDbException::message ( ) const

inlinevirtualinherited

Returns a message describing the problem that caused this exception.

Returns

Message describing the problem that caused this exception.

Definition at line 38 of file wiscdb_exception.h.

{ return message_; }

virtual PageId wiscdb::InvalidPageException::page_number ( ) const

inlinevirtual

Returns the requested page number that caused this exception.

Definition at line 45 of file invalid_page_exception.h.

{ return page_number_; }

virtual const char* wiscdb::WiscDbException::what ( ) const throw ( )

inlinevirtualinherited

Returns a description of the exception.

Returns

Description of the exception.

Definition at line 45 of file wiscdb_exception.h.

{ return message_.c_str(); }

Member Data Documentation

const std::string wiscdb::InvalidPageException::filename_

protected

Name of file which caused this exception.

Definition at line 61 of file invalid_page_exception.h.

std::string wiscdb::WiscDbException::message_

protectedinherited

Message describing the problem that caused this exception.

Definition at line 64 of file wiscdb_exception.h.

const PageId wiscdb::InvalidPageException::page_number_

protected

Requested page number which caused this exception.

Definition at line 56 of file invalid_page_exception.h.

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The documentation for this class was generated from the following files:

• invalid_page_exception.h
• invalid_page_exception.cpp