ostore.oil
Class HMMStage

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

All Implemented Interfaces:

EventHandlerIF

Direct Known Subclasses:

HMMBuilder, HMMPredictor

public abstract class HMMStage

extends Object

implements EventHandlerIF

A superclass for stages which employ HMMs. This class initializes a few useful Class objects, and initializes an HMM and event stream filter. Subclasses should call ModelStage.init at the beginning of their own init method.

Version:

$Id: HMMStage.java,v 1.10 2002/07/22 20:54:53 srhea Exp $

Author:

Dennis Geels

See Also:

HMM

Nested Class Summary

static class	HMMStage.InvalidTypeException An exception thrown when a config file supplies the name of a class or field that does not satisfy type restrictions.
static class	HMMStage.UnsupportedConfigurationException An exception thrown when a config file requests an operation (e.g. emit_predictions) that a particular Builder does not provide.

Field Summary

protected Field	accessor The location of the observable field within the events watched.
protected static String	class_tag
protected Classifier	classifier
protected HMM	model The learning model to use.
protected String	name The name by which to refer to this stage.
protected Class	observed_type The type of events to observe.
protected static Class	QueueElementIF_class The Class object for the QueueElementIF Interface.
protected static Class	QuickSerializable_class The Class object for the QuickSerializable Interface.

Constructor Summary

HMMStage()

Method Summary

void	destroy()
void	handleEvents(QueueElementIF[] elemarr)
void	init(ConfigDataIF config) Performs stage initialization common to HMMBuilders and HMMPredictor.

Methods inherited from class java.lang.Object

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

Methods inherited from interface seda.sandStorm.api.EventHandlerIF

handleEvent

Field Detail

class_tag

protected static String class_tag

QueueElementIF_class

protected static Class QueueElementIF_class

The Class object for the QueueElementIF Interface.

QuickSerializable_class

protected static Class QuickSerializable_class

The Class object for the QuickSerializable Interface.

name

protected String name

The name by which to refer to this stage. It should be the name of the corresponding StageIF.

model

protected HMM model

The learning model to use.

observed_type

protected Class observed_type

The type of events to observe.

accessor

protected Field accessor

The location of the observable field within the events watched. This field comprises the observed output for the HMM.

classifier

protected Classifier classifier

Constructor Detail

HMMStage

public HMMStage()

Method Detail

handleEvents

public void handleEvents(QueueElementIF[] elemarr)
                  throws EventHandlerException

Specified by:

handleEvents in interface EventHandlerIF

EventHandlerException

init

public void init(ConfigDataIF config)
          throws Exception

Performs stage initialization common to HMMBuilders and HMMPredictor.

Specified by:

init in interface EventHandlerIF

Throws:

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

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

Exception

destroy

public void destroy()

Specified by:

destroy in interface EventHandlerIF