ostore.oil
Class HMMBuilder

java.lang.Object
  |
  +--ostore.oil.HMMStage
        |
        +--ostore.oil.HMMBuilder

All Implemented Interfaces:

EventHandlerIF

public class HMMBuilder

extends HMMStage

A stage which automatically fits a Hidden Markov Model to a monitored event stream. This class extends HMMStage, adding support for Builder-specific config tags and ipmlementing the handleEvent method.

Version:

$Id: HMMBuilder.java,v 1.9 2002/07/22 20:54:53 srhea Exp $

Author:

Dennis Geels

See Also:

HMM

Nested Class Summary

Nested classes inherited from class ostore.oil.HMMStage

HMMStage.InvalidTypeException, HMMStage.UnsupportedConfigurationException

Field Summary

protected boolean	emit_deltas true iff this Builder should publish Deltas for its Model whenever the model parameters are recalculated.
protected int	num_observed The total number of observations so far.
protected int	recalculation_period The number of events to observe before recalculating model parameters.
protected String	snapshot_name The name of the snapshot file to write, if write_snapshots == true.
protected boolean	write_snapshots true iff this stage should write out snapshots of its Model every time it recalculates its parameters.

Fields inherited from class ostore.oil.HMMStage

accessor, class_tag, classifier, model, name, observed_type, QueueElementIF_class, QuickSerializable_class

Constructor Summary

HMMBuilder()

Method Summary

void	handleEvent(QueueElementIF elem) Processes the monitored event stream and handles RebuildSignals.
void	init(ConfigDataIF config) Initializes this HMMBuilder using the configuration parameters.

Methods inherited from class ostore.oil.HMMStage

destroy, handleEvents

Methods inherited from class java.lang.Object

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

Field Detail

recalculation_period

protected int recalculation_period

The number of events to observe before recalculating model parameters. If 0, recalculate only when a RebuildSignal is received.

write_snapshots

protected boolean write_snapshots

true iff this stage should write out snapshots of its Model every time it recalculates its parameters.

snapshot_name

protected String snapshot_name

The name of the snapshot file to write, if write_snapshots == true. Otherwise this parameter is ignored.

emit_deltas

protected boolean emit_deltas

true iff this Builder should publish Deltas for its Model whenever the model parameters are recalculated.

num_observed

protected int num_observed

The total number of observations so far.

Constructor Detail

HMMBuilder

public HMMBuilder()

Method Detail

handleEvent

public void handleEvent(QueueElementIF elem)
                 throws UnknownEventException

Processes the monitored event stream and handles RebuildSignals.

Parameters:

elem - Either an event to monitor or a Signal.RebuildSignal.

Throws:

UnknownEventException - if elem is neither of the expected event types.

init

public void init(ConfigDataIF config)
          throws Exception

Initializes this HMMBuilder using the configuration parameters.

Specified by:

init in interface EventHandlerIF

Overrides:

init in class HMMStage

Throws:

InvalidConfigFileException - if the ConfigDataIF contains an invalid parameter or does not contain a required field.

InvalidTypeException - if a parameter specifies a Class or Field which does not implement the proper java interface.

Exception

See Also:

HMMStage.init(seda.sandStorm.api.ConfigDataIF)