/**
* Copyright (C) 2001-2017 by RapidMiner and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapidminer.com
*
* 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/.
*/
package com.rapidminer.tools.math.kernels;
/**
* This is the interface describing the kernel cache.
*
* @author Ingo Mierswa
*/
public interface KernelCache {
/**
* Stores the value. Should only be invoked if the value was not known. This method might delete
* kernel values so that the invocation of get might deliver NaN.
*/
public void store(int i, int j, double value);
/** Delivers the cached value or Double.NaN if the value is not known. */
public double get(int i, int j);
}