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package de.lmu.ifi.dbs.elki.persistent;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2012
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* Defines the requirements for objects that can be stored in a cache and can be
* persistently saved.
*
* @author Elke Achtert
*/
public interface Page {
/**
* Returns the unique id of this Page.
*
* @return the unique id of this Page. Return -1 for unassigned page numbers.
*/
int getPageID();
/**
* Sets the unique id of this Page.
*
* @param id the id to be set
*/
void setPageID(int id);
/**
* Returns true if this page is dirty, false otherwise.
*
* @return true if this page is dirty, false otherwise
*/
boolean isDirty();
/**
* Sets the dirty flag of this page.
*
* @param dirty the dirty flag to be set
*/
void setDirty(boolean dirty);
}
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