resultwriter.java

一个很好的LIBSVM的JAVA源码。对于要研究和改进SVM算法的学者。可以参考。来自数据挖掘工具YALE工具包。

/*
 *  YALE - Yet Another Learning Environment
 *  Copyright (C) 2001-2004
 *      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.operator.io;

import edu.udo.cs.yale.operator.Operator;
import edu.udo.cs.yale.operator.IOObject;
import edu.udo.cs.yale.operator.OperatorException;
import edu.udo.cs.yale.operator.ResultObject;
import edu.udo.cs.yale.tools.ResultService;
import edu.udo.cs.yale.tools.LogService;

/** This operator can be used at each point in an operator chain. It returns all input
 *  it receives without any modification. Every input object which implements the
 *  {@link edu.udo.cs.yale.operator.ResultObject} interface (which is the case for almost all objects generated
 *  by the core Yale operators) will write its results to the file specified by
 *  the parameter <var>resultfile</var> of the {@link edu.udo.cs.yale.operator.ExperimentOperator}.
 *
 *  @yale.xmlclass ResultWriter
 *  @author Ingo
 *  @version $Id: ResultWriter.java,v 1.3 2004/08/27 11:57:37 ingomierswa Exp $
 */
public class ResultWriter extends Operator {


    /** Use the ResultService to write the results of all input ResultObjects into the 
     *  result file.
     */
    public IOObject[] apply() {
	IOObject[] input = getInput().getIOObjects();
	LogService.logMessage("ResultWriter '"+getName()+"' has started writing results.", LogService.TASK);
	ResultService.logResult("Results of ResultWriter '" + getName() + "':");
	for (int i = 0; i < input.length; i++) {
	    if (input[i] instanceof ResultObject)
		ResultService.logResult((ResultObject)input[i]);
	}
	LogService.logMessage("ResultWriter '"+getName()+"' has succesfully ended writing results.", LogService.TASK);
	return new IOObject[0];
    }

    /** Returns null.
     */
    public Class[] getInputClasses() {
	return null;
    }

    /** Returns null.
     */
    public Class[] getOutputClasses() {
	return null;
    }

}