src/main/java/org/apache/log4j/pattern/LogEvent.java [433:595]:
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	LogLog.warn("Level deserialization failed, reverting to default.", e);
	level = Level.toLevel(p);
    }
  }

  private void readObject(ObjectInputStream ois)
                        throws java.io.IOException, ClassNotFoundException {
    ois.defaultReadObject();
    readLevel(ois);

    // Make sure that no location info is available to Layouts
    if(locationInfo == null)
      locationInfo = new LocationInfo(null, null);
  }

  private
  void writeObject(ObjectOutputStream oos) throws java.io.IOException {
    // Aside from returning the current thread name the wgetThreadName
    // method sets the threadName variable.
    this.getThreadName();

    // This sets the renders the message in case it wasn't up to now.
    this.getRenderedMessage();

    // This call has a side effect of setting this.ndc and
    // setting ndcLookupRequired to false if not already false.
    this.getNDC();

    // This call has a side effect of setting this.mdcCopy and
    // setting mdcLookupRequired to false if not already false.
    this.getMDCCopy();

    // This sets the throwable sting representation of the event throwable.
    this.getThrowableStrRep();

    oos.defaultWriteObject();

    // serialize this event's level
    writeLevel(oos);
  }

  private
  void writeLevel(ObjectOutputStream oos) throws java.io.IOException {

    oos.writeInt(level.toInt());

    Class clazz = level.getClass();
    if(clazz == Level.class) {
      oos.writeObject(null);
    } else {
      // writing directly the Class object would be nicer, except that
      // serialized a Class object can not be read back by JDK
      // 1.1.x. We have to resort to this hack instead.
      oos.writeObject(clazz.getName());
    }
  }

    /**
     * Set value for MDC property.
     * This adds the specified MDC property to the event.
     * Access to the MDC is not synchronized, so this
     * method should only be called when it is known that
     * no other threads are accessing the MDC.
     * @since 1.2.15
     * @param propName
     * @param propValue
     */
  public final void setProperty(final String propName,
                          final String propValue) {
        if (mdcCopy == null) {
            getMDCCopy();
        }
        if (mdcCopy == null) {
            mdcCopy = new Hashtable();
        }
        mdcCopy.put(propName, propValue);      
  }

    /**
     * Return a property for this event. The return value can be null.
     *
     * Equivalent to getMDC(String) in log4j 1.2.  Provided
     * for compatibility with log4j 1.3.
     *
     * @param key property name
     * @return property value or null if property not set
     * @since 1.2.15
     */
    public final String getProperty(final String key) {
        Object value = getMDC(key);
        String retval = null;
        if (value != null) {
            retval = value.toString();
        }
        return retval;
    }

    /**
     * Check for the existence of location information without creating it
     * (a byproduct of calling getLocationInformation).
     * @return true if location information has been extracted.
     * @since 1.2.15
     */
    public final boolean locationInformationExists() {
      return (locationInfo != null);
    }

    /**
     * Getter for the event's time stamp. The time stamp is calculated starting
     * from 1970-01-01 GMT.
     * @return timestamp
     *
     * @since 1.2.15
     */
    public final long getTimeStamp() {
      return timeStamp;
    }

    /**
     * Returns the set of the key values in the properties
     * for the event.
     *
     * The returned set is unmodifiable by the caller.
     *
     * Provided for compatibility with log4j 1.3
     *
     * @return Set an unmodifiable set of the property keys.
     * @since 1.2.15
     */
    public Set getPropertyKeySet() {
      return getProperties().keySet();
    }

    /**
     * Returns the set of properties
     * for the event.
     *
     * The returned set is unmodifiable by the caller.
     *
     * Provided for compatibility with log4j 1.3
     *
     * @return Set an unmodifiable map of the properties.
     * @since 1.2.15
     */
    public Map getProperties() {
      getMDCCopy();
      Map properties;
      if (mdcCopy == null) {
         properties = new HashMap();
      } else {
         properties = mdcCopy;
      }
      return Collections.unmodifiableMap(properties);
    }

    /**
     * Get the fully qualified name of the calling logger sub-class/wrapper.
     * Provided for compatibility with log4j 1.3
     * @return fully qualified class name, may be null.
     * @since 1.2.15
     */
    public String getFQNOfLoggerClass() {
      return fqnOfCategoryClass;
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src/main/java/org/apache/log4j/spi/LoggingEvent.java [455:617]:
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	LogLog.warn("Level deserialization failed, reverting to default.", e);
	level = Level.toLevel(p);
    }
  }

  private void readObject(ObjectInputStream ois)
                        throws java.io.IOException, ClassNotFoundException {
    ois.defaultReadObject();
    readLevel(ois);

    // Make sure that no location info is available to Layouts
    if(locationInfo == null)
      locationInfo = new LocationInfo(null, null);
  }

  private
  void writeObject(ObjectOutputStream oos) throws java.io.IOException {
    // Aside from returning the current thread name the wgetThreadName
    // method sets the threadName variable.
    this.getThreadName();

    // This sets the renders the message in case it wasn't up to now.
    this.getRenderedMessage();

    // This call has a side effect of setting this.ndc and
    // setting ndcLookupRequired to false if not already false.
    this.getNDC();

    // This call has a side effect of setting this.mdcCopy and
    // setting mdcLookupRequired to false if not already false.
    this.getMDCCopy();

    // This sets the throwable sting representation of the event throwable.
    this.getThrowableStrRep();

    oos.defaultWriteObject();

    // serialize this event's level
    writeLevel(oos);
  }

  private
  void writeLevel(ObjectOutputStream oos) throws java.io.IOException {

    oos.writeInt(level.toInt());

    Class clazz = level.getClass();
    if(clazz == Level.class) {
      oos.writeObject(null);
    } else {
      // writing directly the Class object would be nicer, except that
      // serialized a Class object can not be read back by JDK
      // 1.1.x. We have to resort to this hack instead.
      oos.writeObject(clazz.getName());
    }
  }

    /**
     * Set value for MDC property.
     * This adds the specified MDC property to the event.
     * Access to the MDC is not synchronized, so this
     * method should only be called when it is known that
     * no other threads are accessing the MDC.
     * @since 1.2.15
     * @param propName
     * @param propValue
     */
  public final void setProperty(final String propName,
                          final String propValue) {
        if (mdcCopy == null) {
            getMDCCopy();
        }
        if (mdcCopy == null) {
            mdcCopy = new Hashtable();
        }
        mdcCopy.put(propName, propValue);      
  }

    /**
     * Return a property for this event. The return value can be null.
     *
     * Equivalent to getMDC(String) in log4j 1.2.  Provided
     * for compatibility with log4j 1.3.
     *
     * @param key property name
     * @return property value or null if property not set
     * @since 1.2.15
     */
    public final String getProperty(final String key) {
        Object value = getMDC(key);
        String retval = null;
        if (value != null) {
            retval = value.toString();
        }
        return retval;
    }

    /**
     * Check for the existence of location information without creating it
     * (a byproduct of calling getLocationInformation).
     * @return true if location information has been extracted.
     * @since 1.2.15
     */
    public final boolean locationInformationExists() {
      return (locationInfo != null);
    }

    /**
     * Getter for the event's time stamp. The time stamp is calculated starting
     * from 1970-01-01 GMT.
     * @return timestamp
     *
     * @since 1.2.15
     */
    public final long getTimeStamp() {
      return timeStamp;
    }

    /**
     * Returns the set of the key values in the properties
     * for the event.
     *
     * The returned set is unmodifiable by the caller.
     *
     * Provided for compatibility with log4j 1.3
     *
     * @return Set an unmodifiable set of the property keys.
     * @since 1.2.15
     */
    public Set getPropertyKeySet() {
      return getProperties().keySet();
    }

    /**
     * Returns the set of properties
     * for the event.
     *
     * The returned set is unmodifiable by the caller.
     *
     * Provided for compatibility with log4j 1.3
     *
     * @return Set an unmodifiable map of the properties.
     * @since 1.2.15
     */
    public Map getProperties() {
      getMDCCopy();
      Map properties;
      if (mdcCopy == null) {
         properties = new HashMap();
      } else {
         properties = mdcCopy;
      }
      return Collections.unmodifiableMap(properties);
    }

    /**
     * Get the fully qualified name of the calling logger sub-class/wrapper.
     * Provided for compatibility with log4j 1.3
     * @return fully qualified class name, may be null.
     * @since 1.2.15
     */
    public String getFQNOfLoggerClass() {
      return fqnOfCategoryClass;
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