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What this is

This file is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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The source code

package examples.customLevel;

import org.apache.log4j.Level;
import org.apache.log4j.Priority;

   This class introduces a new level level called TRACE. TRACE has
   lower level than DEBUG.

public class XLevel extends Level {

  static public final int  TRACE_INT   = Level.DEBUG_INT - 1;
  static public final int  LETHAL_INT  = Level.FATAL_INT + 1;

  private static String TRACE_STR  = "TRACE";
  private static String LETHAL_STR  = "LETHAL";

  public static final XLevel TRACE = new XLevel(TRACE_INT, TRACE_STR, 7);
  public static final XLevel LETHAL = new XLevel(LETHAL_INT, LETHAL_STR, 

  XLevel(int level, String strLevel, int syslogEquiv) {
    super(level, strLevel, syslogEquiv);

     Convert the string passed as argument to a level. If the
     conversion fails, then this method returns {@link #TRACE}. 
  Level toLevel(String sArg) {
    return (Level) toLevel(sArg, XLevel.TRACE);

  Level toLevel(String sArg, Level defaultValue) {

    if(sArg == null) {
      return defaultValue;
    String stringVal = sArg.toUpperCase();
    if(stringVal.equals(TRACE_STR)) {
      return XLevel.TRACE;
    } else if(stringVal.equals(LETHAL_STR)) {
      return XLevel.LETHAL;
    return Level.toLevel(sArg, (Level) defaultValue);    

  Level toLevel(int i) throws  IllegalArgumentException {
    switch(i) {
    case TRACE_INT: return XLevel.TRACE;
    case LETHAL_INT: return XLevel.LETHAL;
    return Level.toLevel(i);

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