edu.stanford.nlp.util.logging
Class VisibilityHandler

java.lang.Object
  edu.stanford.nlp.util.logging.LogRecordHandler
      edu.stanford.nlp.util.logging.VisibilityHandler

public class VisibilityHandler
extends LogRecordHandler

A filter for selecting which channels are visible. This class behaves as an "or" filter; that is, if any of the filters are considered valid, it allows the Record to proceed to the next handler.

Author:

Gabor Angeli (angeli at cs.stanford)

Field Summary

Fields inherited from class edu.stanford.nlp.util.logging.LogRecordHandler

EMPTY

Constructor Summary

VisibilityHandler()

Method Summary

boolean	alsoHide(java.lang.Object filter) Show all the channels currently being printed, with the exception of this new one
boolean	alsoShow(java.lang.Object filter) Show all the channels currently being printed, in addition to a new one
java.util.List<Redwood.Record>	handle(Redwood.Record record) Handle a log Record, either as a filter or by producing a side effect.
void	hideAll() Show none of the channels
void	showAll() Show all of the channels.
java.util.List<Redwood.Record>	signalEndTrack(int newDepth, long timeOfEnd) Signal the end of a track, i.e.
java.util.List<Redwood.Record>	signalStartTrack(Redwood.Record signal) Signal the start of a track, i.e.

Methods inherited from class edu.stanford.nlp.util.logging.LogRecordHandler

signalShutdown

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

VisibilityHandler

public VisibilityHandler()

Method Detail

showAll

public void showAll()

Show all of the channels.

hideAll

public void hideAll()

Show none of the channels

alsoShow

public boolean alsoShow(java.lang.Object filter)

Show all the channels currently being printed, in addition to a new one

Parameters:

filter - The channel to also show

Returns:

true if this channel was already being shown.

alsoHide

public boolean alsoHide(java.lang.Object filter)

Show all the channels currently being printed, with the exception of this new one

Parameters:

filter - The channel to also hide

Returns:

true if this channel was already being hidden.

handle

public java.util.List<Redwood.Record> handle(Redwood.Record record)

Handle a log Record, either as a filter or by producing a side effect.

Specified by:

handle in class LogRecordHandler

Parameters:

record - The log record to handle

Returns:

a (possibly empty) list of records to be sent on in the pipeline

signalStartTrack

public java.util.List<Redwood.Record> signalStartTrack(Redwood.Record signal)

Signal the start of a track, i.e. that we have descended a level deeper.

Overrides:

signalStartTrack in class LogRecordHandler

Parameters:

signal - A record corresponding to the information in the track header. The depth in this object is the old log depth.

Returns:

A list of records to pass down the pipeline, not including the startTrack() signal. The returned records are passed to handle(), not startTrack(), and are sent before the startTrack() signal.

signalEndTrack

public java.util.List<Redwood.Record> signalEndTrack(int newDepth,
                                                     long timeOfEnd)

Signal the end of a track, i.e. that we have popped up to a higher level.

Overrides:

signalEndTrack in class LogRecordHandler

Parameters:

newDepth - The new depth; that is, the current depth - 1.

Returns:

A list of records to pass down the pipeline. The returned records are passed to handle(), not endTrack(). and are sent before the startTrack() signal.