edu.harvard.deas.hyperenc.vsat
Interface PageDatabase

All Known Implementing Classes:

KeyedPageDatabase, NNPageDatabase

public interface PageDatabase

Contains an index of the pages we will provide. Does the book-keeping to make sure that each page is only accessed twice.

Method Summary

int	getMaxPages()
int	getNumPages()
byte[]	getPage(int key) Use the key to return a page.

Method Detail

getNumPages

int getNumPages()

Returns:

Number of pages currently stored in the page database.

getMaxPages

int getMaxPages()

Returns:

Maximum number of pages that can be stored in the page database.

getPage

byte[] getPage(int key)

Use the key to return a page.

Parameters:

key - The key we are trying to match.

Returns:

A page, or null if the database is empty.