PageIterator Class Reference

#include <PageIterator.h>

List of all members.

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Detailed Description

HFPage iterator.

This class does not implement the Iterator interface because of the potential I/O exceptions. While they could be appropriately handled, it seemed more straightforward just to pass them on through.

Author:

Dave Musicant, with considerable material reused from the UW-Madison Minibase project

Public Member Functions
	PageIterator (BufferManager *buf, int firstId, string file)
	Constructs a page iterator.
bool	hasNext ()
	Returns true if the iterator has more pages.
int	next ()
	Returns the next page id in the iteration.

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Constructor & Destructor Documentation

PageIterator::PageIterator	(	BufferManager *	buf,
		int	firstId,
		string	file
	)

Constructs a page iterator.

Parameters:

	buf	pointer to a buffer manager to use for managing pages in memory.
	firstId	the page id of the starting page.
	file	the name of the file that the page are drawn from.

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Member Function Documentation

bool PageIterator::hasNext

(

)

Returns true if the iterator has more pages.

Returns:

true if the iterator has more pages.

int PageIterator::next

(

)

Returns the next page id in the iteration.

Returns:

the next page id.

Exceptions:

NoSuchElementException

iteration has no more pages.

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