Parsing Engine

danbikel.parser.ms
Class ModNonterminalModelStructure5

java.lang.Object
  extended by danbikel.parser.ProbabilityStructure
      extended by danbikel.parser.ms.ModNonterminalModelStructure4
          extended by danbikel.parser.ms.ModNonterminalModelStructure5
All Implemented Interfaces:
Serializable

public class ModNonterminalModelStructure5
extends ModNonterminalModelStructure4

This class provides a probability structure identical to its superclass, except that getFuture(TrainerEvent,int) has been overridden so that the future only consists of an unlexicalized modifying nonterminal label. Furthermore, this probability structure overrides the jointModel() method to return an array containing a TagModelStructure1 instance.

See Also:
jointModel(), TagModelStructure1, 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
ModNonterminalModelStructure5()
           
 
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.
 ProbabilityStructure[] jointModel()
          Returns an array of other ProbabilityStructure objects for use in a JointModel instance, or null if this probability structure should not be composed with a JointModel instance.
 Model newModel()
          Returns a newly-constructed Model object for this probability structure.
 
Methods inherited from class danbikel.parser.ms.ModNonterminalModelStructure4
doCleanup, getHistory, maxEventComponents, numLevels, removeHistory
 
Methods inherited from class danbikel.parser.ProbabilityStructure
cacheSize, defaultSmoothingParamsFilename, dontAddNewParameters, doPruning, getAdditionalData, getTopLevelCacheSize, getTransition, lambdaFudge, lambdaFudgeTerm, lambdaPenalty, priorLevel, removeFuture, 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

ModNonterminalModelStructure5

public ModNonterminalModelStructure5()
Method Detail

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.

Overrides:
getFuture in class ModNonterminalModelStructure4
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

newModel

public Model newModel()
Description copied from class: ProbabilityStructure
Returns a newly-constructed Model object for this probability structure. The default implementation here returns an instance of Model. If a concrete ProbabilityStructure class overrides ProbabilityStructure.jointModel(), it should use this method to return an instance of a class that is suitable for handling multiple ProbabilityStructure objects, such as JointModel.

Overrides:
newModel in class ProbabilityStructure
See Also:
ProbabilityStructure.jointModel(), Model, JointModel

jointModel

public ProbabilityStructure[] jointModel()
Description copied from class: ProbabilityStructure
Returns an array of other ProbabilityStructure objects for use in a JointModel instance, or null if this probability structure should not be composed with a JointModel instance. This default implementation returns null.

Overrides:
jointModel in class ProbabilityStructure
Returns:
an array of other ProbabilityStructure objects, or null if this probability structure should not be composed with a JointModel instance
See Also:
JointModel

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.

Overrides:
copy in class ModNonterminalModelStructure4

Parsing Engine

Author: Dan Bikel.