/*
* RapidMiner
*
* Copyright (C) 2001-2008 by Rapid-I and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapid-i.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.operator.learner.associations.fpgrowth;
/**
* A stack for frequencies.
*
* @author Sebastian Land
* @version $Id: FrequencyStack.java,v 1.3 2008/05/09 19:23:19 ingomierswa Exp $
*/
public interface FrequencyStack {
/**
* Increases the frequency stored on stackHeight level of stack by value, if stackHeight is the top of stack, or stackHeight is top of stack + 1
*
* @param stackHeight
* describes the level of stack, counted from bottom on which the value is added
* @param value
* is the amount added
*/
public void increaseFrequency(int stackHeight, int value);
/**
* This method deletes the heightTH element of stack.
*/
public void popFrequency(int height);
/**
* Returns the frequency stored on height of stack.
*/
public int getFrequency(int height);
}