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## weka.core
Class Debug

    java.lang.Object
      weka.core.Debug

All Implemented Interfaces:
  java.io.Serializable, RevisionHandler

    public class Debug

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

A helper class for debug output, logging, clocking, etc.

Version:
  $Revision: 7519 $
Author:
  fracpete (fracpete at waikato dot ac dot nz)
See Also:
  Serialized Form

Nested Class Summary
`static class` | `Debug.Clock` A little helper class for clocking and outputting times.
`static class` | `Debug.DBO` contains debug methods
`static class` | `Debug.Log` A helper class for logging stuff.
`static class` | `Debug.Random` This extended Random class enables one to print the generated random numbers etc., before they are returned.
`static class` | `Debug.SimpleLog` A little, simple helper class for logging stuff.
`static class` | `Debug.Timestamp` A class that can be used for timestamps in files, The toString() method simply returns the associated Date object in a timestamp format.

Field Summary
`static java.util.logging.Level` | `ALL` the log level All
`static java.util.logging.Level` | `CONFIG` the log level Vonfig
`static java.util.logging.Level` | `FINE` the log level Fine
`static java.util.logging.Level` | `FINER` the log level Finer
`static java.util.logging.Level` | `FINEST` the log level Finest
`static java.util.logging.Level` | `INFO` the log level Info
`static java.util.logging.Level` | `OFF` the log level Off - i.e., no logging
`static java.util.logging.Level` | `SEVERE` the log level Severe
`static java.util.logging.Level` | `WARNING` the log level Warning

Constructor Summary
`Debug()` default constructor, prints only to stdout
`Debug(java.lang.String filename)` logs the output to the specified file (and stdout).
`Debug(java.lang.String filename, int size, int numFiles)` logs the output

Method Summary
`Debug.Clock` | `getClock()` returns the instance of the Clock that is internally used
`static java.lang.String` | `getCurrentDir()` returns the current working directory of the user
`boolean` | `getEnabled()` returns whether the logging is enabled
`static java.lang.String` | `getHomeDir()` returns the home directory of the user
`java.lang.String` | `getRevision()` Returns the revision string.
`static java.lang.String` | `getTempDir()` returns the system temp directory
`static java.lang.Object` | `loadFromFile(java.lang.String filename)` deserializes the content of the file and returns it, null if an error occurred.
`void` | `log(java.util.logging.Level level, java.lang.String message)` prints the given message with the specified level and an empty sourceclass
`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` | `log(java.lang.String message)` prints the given message with level INFO
`static Debug.Clock` | `newClock()` returns a new instance of a clock
`static Debug.Log` | `newLog(java.lang.String filename, int size, int numFiles)` returns a new Log instance
`static java.util.Random` | `newRandom()` returns a default debug random object, with no particular seed and debugging enabled.
`static java.util.Random` | `newRandom(int seed)` returns a debug random object with the specified seed and debugging enabled.
`static Debug.Timestamp` | `newTimestamp()` returns a default timestamp for the current date/time
`static boolean` | `saveToFile(java.lang.String filename, java.lang.Object o)` writes the serialized object to the speicified file
`void` | `setEnabled(boolean value)` sets whether the logging is enabled or not
`void` | `startClock()` starts the clock
`void` | `stopClock(java.lang.String message)` stops the clock and prints the message associated with the time, but only if the logging is enabled.
`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).
`static boolean` | `writeToFile(java.lang.String filename, java.lang.Object obj)` Writes the given object to the specified file.
`static boolean` | `writeToFile(java.lang.String filename, java.lang.Object obj, boolean append)` Writes the given object to the specified file.
`static boolean` | `writeToFile(java.lang.String filename, java.lang.String message)` Writes the given message to the specified file.
`static boolean` | `writeToFile(java.lang.String filename, java.lang.String message, boolean append)` Writes the given message to the specified file.

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

Field Detail

### ALL

    public static final java.util.logging.Level ALL

  the log level All

### CONFIG

    public static final java.util.logging.Level CONFIG

  the log level Vonfig

### FINE

    public static final java.util.logging.Level FINE

  the log level Fine

### FINER

    public static final java.util.logging.Level FINER

  the log level Finer

### FINEST

    public static final java.util.logging.Level FINEST

  the log level Finest

### INFO

    public static final java.util.logging.Level INFO

  the log level Info

### OFF

    public static final java.util.logging.Level OFF

  the log level Off - i.e., no logging

### SEVERE

    public static final java.util.logging.Level SEVERE

  the log level Severe

### WARNING

    public static final java.util.logging.Level WARNING

  the log level Warning

Constructor Detail

### Debug

    public Debug()

  default constructor, prints only to stdout

### Debug

    public Debug(java.lang.String filename)

  logs the output to the specified file (and stdout). Size is 1,000,000 bytes and 1 file.

  Parameters:
    `filename` - the name of the log

### Debug

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

  logs the output

  Parameters:
    `filename` - the name of the log
    `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

### newLog

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

  returns a new Log instance

  Parameters:
    `filename` - the name of the log
    `size` - the size of the files in bytes
    `numFiles` - the number of files for rotating
  Returns:
    the log instance

### log

    public void log(java.lang.String message)

  prints the given message with level INFO

  Parameters:
    `message` - the message to print

### log

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

  prints the given message with the specified level and an empty sourceclass

  Parameters:
    `level` - the level of logging
    `message` - the message to print

### 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

### setEnabled

    public void setEnabled(boolean value)

  sets whether the logging is enabled or not

  Parameters:
    `value` - if true logging will be enabled

### getEnabled

    public boolean getEnabled()

  returns whether the logging is enabled

  Returns:
    true if the logging is enabled

### newClock

    public static Debug.Clock newClock()

  returns a new instance of a clock

  Returns:
    a new instance of a Clock

### getClock

    public Debug.Clock getClock()

  returns the instance of the Clock that is internally used

  Returns:
    the clock that's being used

### startClock

    public void startClock()

  starts the clock

### stopClock

    public void stopClock(java.lang.String message)

  stops the clock and prints the message associated with the time, but only if the logging is enabled.

  Parameters:
    `message` - the message to print
  See Also:
    `getEnabled()`

### newRandom

    public static java.util.Random newRandom()

  returns a default debug random object, with no particular seed and debugging enabled.

  Returns:
    a new instance of a Random object

### newRandom

    public static java.util.Random newRandom(int seed)

  returns a debug random object with the specified seed and debugging enabled.

  Parameters:
    `seed` - the seed value
  Returns:
    a new instance of a Random object

### newTimestamp

    public static Debug.Timestamp newTimestamp()

  returns a default timestamp for the current date/time

  Returns:
    a new timestamp

### getTempDir

    public static java.lang.String getTempDir()

  returns the system temp directory

  Returns:
    the temp directory

### getHomeDir

    public static java.lang.String getHomeDir()

  returns the home directory of the user

  Returns:
    the user's home directory

### getCurrentDir

    public static java.lang.String getCurrentDir()

  returns the current working directory of the user

  Returns:
    the user's current working directory

### writeToFile

    public static boolean writeToFile(java.lang.String filename,
                                      java.lang.Object obj)

  Writes the given object to the specified file. The string representation of the object is appended to the file.

  Parameters:
    `filename` - the file to write to
    `obj` - the object to write to the file
  Returns:
    true if writing was successful

### writeToFile

    public static boolean writeToFile(java.lang.String filename,
                                      java.lang.String message)

  Writes the given message to the specified file. The message is appended to the file.

  Parameters:
    `filename` - the file to write to
    `message` - the message to write
  Returns:
    true if writing was successful

### writeToFile

    public static boolean writeToFile(java.lang.String filename,
                                      java.lang.Object obj,
                                      boolean append)

  Writes the given object to the specified file. The string representation of the object is either appended or replaces the current content of the file.

  Parameters:
    `filename` - the file to write to
    `obj` - the object to write to the file
    `append` - whether to append the message or not
  Returns:
    true if writing was successful

### writeToFile

    public static boolean writeToFile(java.lang.String filename,
                                      java.lang.String message,
                                      boolean append)

  Writes the given message to the specified file. The message is either appended or replaces the current content of the file.

  Parameters:
    `filename` - the file to write to
    `message` - the message to write
    `append` - whether to append the message or not
  Returns:
    true if writing was successful

### saveToFile

    public static boolean saveToFile(java.lang.String filename,
                                     java.lang.Object o)

  writes the serialized object to the speicified file

  Parameters:
    `filename` - the file to serialize the object to
    `o` - the object to serialize
  Returns:
    true if writing was successful

### loadFromFile

    public static java.lang.Object loadFromFile(java.lang.String filename)

  deserializes the content of the file and returns it, null if an error occurred.

  Parameters:
    `filename` - the name of the file to deserialize
  Returns:
    the deserialized content, null if problem occurred

### getRevision

    public java.lang.String getRevision()

  Returns the revision string.

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

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