Logger.java

package org.irmacard.personalisation;

import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.util.Date;

public class Logger {
	private static final String LOG_FILENAME = "IrmaWriter.log";
	
	public static void log(String message, Exception e) {
		PrintStream stream = null;
		try {
			stream = new PrintStream(new BufferedOutputStream(new FileOutputStream(LOG_FILENAME, true)));
			stream.append(String.format("===========================================%n" +
										"%tc: %s%n", new Date(), message));
			e.printStackTrace(stream);
			stream.append(String.format("%n%n"));
		} catch (IOException e1) {
			e1.printStackTrace();
		}
		finally {
			if(stream != null) {
				stream.close();
			}
		}
	}

	public static void log(String message) {
		PrintStream stream = null;
		try {
			stream = new PrintStream(new BufferedOutputStream(new FileOutputStream(LOG_FILENAME, true)));
			stream.append(String.format("===========================================%n" +
										"%tc: %s%n", new Date(), message));
			stream.append(String.format("%n%n"));
		} catch (IOException e1) {
			e1.printStackTrace();
		}
		finally {
			if(stream != null) {
				stream.close();
			}
		}
	}
}