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## weka.core
Class Debug.Log

    java.lang.Object
      weka.core.Debug.Log

All Implemented Interfaces:
  java.io.Serializable, RevisionHandler

Enclosing class:
  Debug

    public static class Debug.Log

extends java.lang.Object
implements java.io.Serializable, RevisionHandler

A helper class for logging stuff. Uses the java.util.logging package. If this approach seems an "overkill" (it can create quite a few log files if used in different threads), one can use the Debug.SimpleLog class.

Version:
  $Revision: 7519 $
Author:
  FracPete (fracpete at waikato dot ac dot nz)
See Also:
  `Debug.SimpleLog`, Serialized Form

Constructor Summary
`Debug.Log()` default constructor, uses only stdout
`Debug.Log(java.lang.String filename)` creates a logger that logs into the specified file, if null then only stdout is used.
`Debug.Log(java.lang.String filename, int size, int numFiles)` creates a logger that logs into the specified file, if null then only stdout is used.

Method Summary
`java.lang.String` | `getFilename()` returns the filename of the log, can be null
`int` | `getNumFiles()` returns the number of files being used
`java.lang.String` | `getRevision()` Returns the revision string.
`int` | `getSize()` returns the size of the files
`void` | `log(java.util.logging.Level level, java.lang.String message)` logs the given message
`void` | `log(java.util.logging.Level level, java.lang.String sourceclass, java.lang.String message)` prints the given message with the specified level
`void` | `log(java.util.logging.Level level, java.lang.String sourceclass, java.lang.String sourcemethod, java.lang.String message)` prints the given message with the specified level
`void` | `logSystemInfo()` a convenience method for dumping the current system info in the log file
`static java.util.logging.Level` | `stringToLevel(java.lang.String level)` turns the string representing a level, e.g., "FINE" or "ALL" into the corresponding level (case-insensitive).
`java.lang.String` | `toString()` returns a string representation of the logger

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Constructor Detail

### Debug.Log

    public Debug.Log()

  default constructor, uses only stdout

### Debug.Log

    public Debug.Log(java.lang.String filename)

  creates a logger that logs into the specified file, if null then only stdout is used. It uses 1,000,000 bytes for file size and 1 file.

  Parameters:
    `filename` - the file to log into

### Debug.Log

    public Debug.Log(java.lang.String filename,
                     int size,
                     int numFiles)

  creates a logger that logs into the specified file, if null then only stdout is used.

  Parameters:
    `filename` - the file to log into
    `size` - the size of the files in bytes
    `numFiles` - the number of files for rotating

Method Detail

### stringToLevel

    public static java.util.logging.Level stringToLevel(java.lang.String level)

  turns the string representing a level, e.g., "FINE" or "ALL" into the corresponding level (case-insensitive). The default is ALL.

  Parameters:
    `level` - the string to return a level for
  Returns:
    the corresponding level or the default

### getFilename

    public java.lang.String getFilename()

  returns the filename of the log, can be null

  Returns:
    the filename of the log

### getSize

    public int getSize()

  returns the size of the files

  Returns:
    the size of a file

### getNumFiles

    public int getNumFiles()

  returns the number of files being used

  Returns:
    the number of files

### log

    public void log(java.util.logging.Level level,
                    java.lang.String message)

  logs the given message

  Parameters:
    `level` - the level of severity
    `message` - the message to log

### log

    public void log(java.util.logging.Level level,
                    java.lang.String sourceclass,
                    java.lang.String message)

  prints the given message with the specified level

  Parameters:
    `level` - the level of logging
    `sourceclass` - the class that logs the message
    `message` - the message to print

### log

    public void log(java.util.logging.Level level,
                    java.lang.String sourceclass,
                    java.lang.String sourcemethod,
                    java.lang.String message)

  prints the given message with the specified level

  Parameters:
    `level` - the level of logging
    `sourceclass` - the class that logs the message
    `sourcemethod` - the method that logs the message
    `message` - the message to print

### logSystemInfo

    public void logSystemInfo()

  a convenience method for dumping the current system info in the log file

  See Also:
    `SystemInfo`

### toString

    public java.lang.String toString()

  returns a string representation of the logger

  Overrides:
    `toString` in class `java.lang.Object`
  Returns:
    a string representation of the logger

### getRevision

    public java.lang.String getRevision()

  Returns the revision string.

  Specified by:
    `getRevision` in interface `RevisionHandler`
  Returns:
    the revision

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