Parsing Engine

danbikel.parser.ms
Class NonterminalPriorModelStructure1

java.lang.Object
  extended by danbikel.parser.ProbabilityStructure
      extended by danbikel.parser.ms.NonterminalPriorModelStructure1
All Implemented Interfaces:
Serializable

public class NonterminalPriorModelStructure1
extends ProbabilityStructure

See Also:
Serialized Form

Field Summary
 
Fields inherited from class danbikel.parser.ProbabilityStructure
additionalData, defaultModelClassName, defaultModelConstructor, doPruning, estimates, futureList, futures, futuresWithSubcats, histories, historiesWithSubcats, historyList, lambdas, prevHistCount, topLevelCacheSize, transitions
 
Constructor Summary
NonterminalPriorModelStructure1()
           
 
Method Summary
 ProbabilityStructure copy()
          Returns a deep copy of this object.
 Event getFuture(TrainerEvent trainerEvent, int backOffLevel)
          Extracts the future for the specified level of back-off from the specified trainer event.
 Event getHistory(TrainerEvent trainerEvent, int backOffLevel)
          Extracts the history context for the specified back-off level from the specified trainer event.
 int maxEventComponents()
          Allows subclasses to specify the maximum number of event components, so that the constructor of this class may pre-allocate space in its internal, reusable MutableEvent objects (used for efficient event construction).
 int numLevels()
          Returns the number of back-off levels.
 
Methods inherited from class danbikel.parser.ProbabilityStructure
cacheSize, defaultSmoothingParamsFilename, doCleanup, dontAddNewParameters, doPruning, getAdditionalData, getTopLevelCacheSize, getTransition, jointModel, lambdaFudge, lambdaFudgeTerm, lambdaPenalty, newModel, priorLevel, removeFuture, removeHistory, removeTransition, saveSmoothingParameters, setAdditionalData, smoothingParametersFile, useSmoothingParameters
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

NonterminalPriorModelStructure1

public NonterminalPriorModelStructure1()
Method Detail

maxEventComponents

public int maxEventComponents()
Description copied from class: ProbabilityStructure
Allows subclasses to specify the maximum number of event components, so that the constructor of this class may pre-allocate space in its internal, reusable MutableEvent objects (used for efficient event construction). The default implementation simply returns 1.

Overrides:
maxEventComponents in class ProbabilityStructure
Returns:
1 (subclasses should override this method)
See Also:
MutableEvent.ensureCapacity(int)

numLevels

public int numLevels()
Description copied from class: ProbabilityStructure
Returns the number of back-off levels.

Specified by:
numLevels in class ProbabilityStructure

getHistory

public Event getHistory(TrainerEvent trainerEvent,
                        int backOffLevel)
Description copied from class: ProbabilityStructure
Extracts the history context for the specified back-off level from the specified trainer event.

Specified by:
getHistory in class ProbabilityStructure
Parameters:
trainerEvent - the event for which a history context is desired for the specified back-off level
backOffLevel - the back-off level for which to get a history context from the specified trainer event
Returns:
an Event object that represents the history context for the specified back-off level

getFuture

public Event getFuture(TrainerEvent trainerEvent,
                       int backOffLevel)
Description copied from class: ProbabilityStructure
Extracts the future for the specified level of back-off from the specified trainer event. Typically, futures remain the same regardless of back-off level.

Specified by:
getFuture in class ProbabilityStructure
Parameters:
trainerEvent - the event from which a future is to be extracted
backOffLevel - the back-off level for which to get the future event
Returns:
an Event object that represents the future for the specified back-off level

copy

public ProbabilityStructure copy()
Description copied from class: ProbabilityStructure
Returns a deep copy of this object. Currently, all data members of ProbabilityStructure objects are used solely as temporary storage during certain method invocations; therefore, this copy method should simply return a new instance of the runtime type of this ProbabilityStructure object, with freshly-created data members that are not deep copies of the data members of this object. The general contract of the copy method is slightly violated here, but without undue harm, given the lack of persistent data of these types of objects. If a concrete subclass has specific requirements for its data members to be deeply copied, this method should be overridden.

Specified by:
copy in class ProbabilityStructure

Parsing Engine

Author: Dan Bikel.