experimentoperator.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;

import edu.udo.cs.yale.Experiment;
import edu.udo.cs.yale.ExperimentListener;
import edu.udo.cs.yale.operator.parameter.*;
import edu.udo.cs.yale.tools.LogService;
import edu.udo.cs.yale.tools.TempFileService;
import edu.udo.cs.yale.tools.Tools;

import java.util.List;
import java.util.LinkedList;
import java.util.Iterator;
import java.io.File;

/** Each experiment must contain exactly one operator of this class and it must be
 *  the root operator of the experiment. The only purpose of this operator is to provide 
 *  some parameters that have global relevance.
 *
 *  @yale.xmlclass Experiment
 *  @author Ingo
 *  @version $Id: ExperimentOperator.java,v 2.11 2004/08/27 11:57:34 ingomierswa Exp $
 */
final public class ExperimentOperator extends OperatorChain {

    private List listenerList = new LinkedList();

    public ExperimentOperator() {
	super();
    }

    /** Creates an empty operator chain. */
    public ExperimentOperator(Experiment experiment) {
	super();
	setExperiment(experiment);
    }

    /** Returns the highest possible value for the maximum number of innner operators. */
    public int getMaxNumberOfInnerOperators() { return Integer.MAX_VALUE; }
    /** Returns 0 for the minimum number of innner operators. */
    public int getMinNumberOfInnerOperators() { return 0; }

    public int getNumberOfSteps() {
	return getNumberOfChildrensSteps();
    }

    public void addExperimentListener(ExperimentListener l) {
	listenerList.add(l);
    }

    public void removeExperimentListener(ExperimentListener l) {
	listenerList.remove(l);
    }

    public void countStep() {
	super.countStep();
	Iterator i = listenerList.iterator();
	while (i.hasNext()) {
	    ((ExperimentListener)i.next()).experimentStep(this);
	}
    }

    /** Called at the end of the experiment. Notifies all listeners and the children operators (super method). */
    public void experimentFinished() {
	super.experimentFinished();
	Iterator i = listenerList.iterator();
	while (i.hasNext()) {
	    ((ExperimentListener)i.next()).experimentEnded();
	}
    }

    public void sendEmail(IOContainer results, Throwable e) {
	String email = getParameterAsString("notification_email");
	if (email == null) return;
	LogService.logMessage("Sending notification email to '"+email+"'", LogService.STATUS);

  	String name = email;
  	int at = name.indexOf("@");
	if (at >= 0) name = name.substring(0, at);

	String subject = "Experiment "+getName()+" finished";
	String content = "Hello "+name+",\n\n";
	content += "I'm sending you a notification message on your experiment '"+getName()+"'.\n";

	File logFile = LogService.getLogFile();
	if (logFile != null) {
	    content += "Logfile is file://"+logFile.getAbsolutePath()+"\n\n";
	}

	if (e != null) {
	    content += "Experiment failed: "+e.toString();
	    subject =  "Experiment "+getName()+" failed";
	} 

	if (results != null) {
	    content += "\n\nResults:";
	    ResultObject result;
	    int i = 0;
	    do {
		try {
		    result = (ResultObject)results.getInput(ResultObject.class, i, false);
		    content += "\n\n\n" + result.toResultString();
		    i++;
		} catch (MissingIOObjectException exc) {
		    break;
		}
	    } while (result != null);
	}

	Tools.sendEmail(email, subject, content);
    }

    public Class[] getInputClasses() {
	return new Class[0];
    }

    public Class[] getOutputClasses() {
	return new Class[0];
    }

    /** Returns true if and only if all inner operators accept their precessors' ouput
     *  as input. */
    public Class[] checkIO(Class[] input) throws IllegalInputException {
	for (int i = 0; i < getNumberOfOperators(); i++) {
	    Operator o = getOperator(i);
	    if (o.isEnabled())
		input = o.checkIO(input);
	}
	return input;
    }

    public List getParameterTypes() {
	List types = super.getParameterTypes();
	ParameterType type = new ParameterTypeCategory("logverbosity", "Log verbosity level.", LogService.LOG_VERBOSITY_NAMES, LogService.MINIMUM+1);
	type.setExpert(false);
	types.add(type);
	type = new ParameterTypeFile("logfile", "File to write logging information to.", true);
	type.setExpert(false);
	types.add(type);
	types.add(new ParameterTypeFile("resultfile", "File to write results to.", true));
	types.add(new ParameterTypeFile("temp_dir", "Directory for temp files.", true));
	types.add(new ParameterTypeCategory("delete_temp_files", "Keep all or none of the generated temporary files.", TempFileService.DELETE_TEMP_FILES, TempFileService.DIRECTLY));
	types.add(new ParameterTypeInt("random_seed", "Global random seed for random generators.", Integer.MIN_VALUE, Integer.MAX_VALUE, 2001));
	types.add(new ParameterTypeString("notification_email", "Email address for the notification mail.", true));
	return types;
    }
}