bugreport.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.tools;

import edu.udo.cs.yale.Experiment;

import java.util.Enumeration;
import java.util.Date;
import java.util.zip.*;
import java.io.File;
import java.io.PrintStream;
import java.io.FileOutputStream;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.IOException;

/**
 *  @version $Id: BugReport.java,v 1.3 2004/08/27 11:57:45 ingomierswa Exp $
 */
public class BugReport {

    private static final int BUFFER_SIZE = 1024;

    private static void getProperties(String prefix, StringBuffer string) {
	string.append(prefix+" properties:\n");
	Enumeration keys = System.getProperties().propertyNames();
	while (keys.hasMoreElements()) {
	    String key = (String)keys.nextElement();
	    if (key.startsWith(prefix)) {
		string.append("  "+key + "\t= "+System.getProperty(key) + "\n");
	    }
	}
    }

    public static String getProperties() {
	StringBuffer string = new StringBuffer();
	string.append("System properties:\n");
	string.append("------------------\n\n");
	getProperties("os", string);
	getProperties("java", string);
	getProperties("yale", string);
	return string.toString();
    }

    public static String getStackTrace(Throwable throwable) {
	StringBuffer string = new StringBuffer();
	string.append("Stack trace:\n");
	string.append("------------\n\n");
	while (throwable != null) {
	    string.append("Exception:\t"+throwable.getClass().getName()+"\n");
	    string.append("Message:\t"  +throwable.getMessage()+"\n");
	    string.append("Stack trace:\n");	    
	    StackTraceElement[] ste = throwable.getStackTrace();
	    for (int i = 0; i < ste.length; i++) {
		string.append("  "+ste[i]+"\n");
	    }
	    string.append("\n");

	    throwable = throwable.getCause();
	    if (throwable != null) {
		string.append("");
		string.append("Cause:");
	    }
	}
	return string.toString();
    }

    public static void createBugReport(File reportFile, 
				       Throwable exception,
				       String userMessage,
				       Experiment experiment,
				       String logMessage,
				       File[] attachments) throws IOException {
	ZipOutputStream zipOut = new ZipOutputStream(new FileOutputStream(reportFile));
	zipOut.setComment("Yale bug report - generated "+new Date());
	write("message.txt", "User message", userMessage, zipOut);
	write("_experiment.xml", "Experiment as in memory.", 
	      experiment.getRootOperator().getXML(""), zipOut);
	if (experiment.getExperimentFile() != null) {
	    try {
		String contents = Tools.readTextFile(experiment.getExperimentFile());
		write(experiment.getExperimentFile().getName(), "Experiment file on disc.", contents, zipOut);
	    } catch (Throwable t) {
		write(experiment.getExperimentFile().getName(), "Experiment file on disc.", "could not read: "+t, zipOut);
	    }
	}
	write("_log.txt", "Log message", logMessage, zipOut);
	write("_properties.txt", "System properties, information about java version and operating system", getProperties(), zipOut);
	write("_exception.txt", "Exception stack trace", getStackTrace(exception), zipOut);

	for (int i = 0; i < attachments.length; i++)
	    writeFile(attachments[i], zipOut);
	zipOut.close();
    }

    private static void writeFile(File file, ZipOutputStream out) throws IOException {
	InputStream in = new FileInputStream(file);
	out.putNextEntry(new ZipEntry(file.getName()));
	byte[] buffer = new byte[BUFFER_SIZE];
	int read = -1;
	do {
	    read = in.read(buffer);
	    if (read > -1) {
		out.write(buffer, 0, read);
	    }
	} while (read > -1);
	out.closeEntry();
    }

    private static void write(String name, String comment,
			      String string,
			      ZipOutputStream out) throws IOException {
	ZipEntry entry = new ZipEntry(name);
	entry.setComment(comment);
	out.putNextEntry(entry);

	PrintStream print = new PrintStream(out);
	print.println(string);
	print.flush();

	out.closeEntry();
    }
}