datarow.java

著名的开源仿真软件yale

/*
 *  YALE - Yet Another Learning Environment
 *  Copyright (C) 2002, 2003
 *      Simon Fischer, Ralf Klinkenberg, Ingo Mierswa, 
 *          Katharina Morik, Oliver Ritthoff
 *      Artificial Intelligence Unit
 *      Computer Science Department
 *      University of Dortmund
 *      44221 Dortmund,  Germany
 *  email: [e-mail]
 *  web:   http://yale.cs.uni-dortmund.de/
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License as 
 *  published by the Free Software Foundation; either version 2 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
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 *  USA.
 */
package edu.udo.cs.yale.example;

/** This interface replaces the old double-Array used by the 
 *  ExampleTable implementations. It provides a set and get method for
 *  the data. Subclasses may use a double array, a sparse representation,
 *  a file or a database.
 *  @version $Id: DataRow.java,v 2.3 2003/05/06 20:02:10 fischer Exp $ */
public interface DataRow {

    /** Returns the value stored at the given {@link Attribute}'s index. */
    public double get(Attribute attribute);

    /** Sets the value of the {@link Attribute} to <code>value</code>. */
    public void set(Attribute attribute, double value);

    /** Ensures that neither <code>get(i)</code> nor <code>put(i,v)</code>
     *  throw a runtime exception for all <i>0 <= i <= numberOfColumns</i>. */
    public void ensureNumberOfColumns(int numberOfColumns);

}