/* Sim_outfile.java
 */

package eduni.simjava;

import java.io.PrintWriter;
import java.io.FileOutputStream;
import java.io.IOException;

/**
 * The default trace output class, which implements the Sim_output
 * interface. This class implements output to a file called tracefile
 * in the current directory, and is used by default in full Java applications.
 * Note that it can't be used in applets, because they do not allow access
 * to files.
 *
 * Updated for JDK1.1 to use PrintWriter not a PrintStream.
 * @see         Sim_output
 * @version     1.0, 4 September
 * @version     1.1, 24 March 1997
 * @author      Ross McNab, Fred Howell
 */

public class Sim_outfile implements Sim_output {
  private PrintWriter trcstream;

  /** Constructor */
  public Sim_outfile()  { }
  /** Attempts to open the file */
  public void initialise() {
    try {
      trcstream = new PrintWriter(new FileOutputStream("tracefile"));
    } catch(IOException e) {
      System.out.println("Sim_system: Error - could not open trace file");
    }
  }
  /** Prints a trace line to the file
   * @param msg The message to print
   */
  public void println(String msg) {
    trcstream.println(msg);
  }

  /** Closes the file */
  public void close() {
    trcstream.close();
  }
}