Package opennlp.tools.ml

Class TrainerFactory

java.lang.Object

opennlp.tools.ml.TrainerFactory

public class TrainerFactory
extends Object

A factory to initialize Trainer instances depending on a trainer type configured via TrainingParameters.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	TrainerFactory.TrainerType

Constructor Summary

Constructors

Constructor	Description
TrainerFactory()

Method Summary

Modifier and Type	Method	Description
static <T> EventModelSequenceTrainer<T>	getEventModelSequenceTrainer(TrainingParameters trainParams, Map<String,String> reportMap)	Retrieves an EventModelSequenceTrainer that fits the given parameters.
static EventTrainer	getEventTrainer(TrainingParameters trainParams, Map<String,String> reportMap)	Retrieves an EventTrainer that fits the given parameters.
static SequenceTrainer	getSequenceModelTrainer(TrainingParameters trainParams, Map<String,String> reportMap)	Retrieves a SequenceTrainer that fits the given parameters.
static TrainerFactory.TrainerType	getTrainerType(TrainingParameters trainParams)	Determines the TrainerFactory.TrainerType based on the TrainingParameters.ALGORITHM_PARAM value.
static boolean	isValid(TrainingParameters trainParams)

Methods inherited from class java.lang.Object

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

Constructor Details

TrainerFactory

public TrainerFactory()

Method Details

getTrainerType

public static TrainerFactory.TrainerType getTrainerType(TrainingParameters trainParams)

Determines the TrainerFactory.TrainerType based on the TrainingParameters.ALGORITHM_PARAM value.

Parameters:

trainParams - - A mapping of training parameters.

Returns:

The TrainerFactory.TrainerType or null if the type couldn't be determined.

getSequenceModelTrainer

public static SequenceTrainer getSequenceModelTrainer(TrainingParameters trainParams,
 Map<String,String> reportMap)

Retrieves a SequenceTrainer that fits the given parameters.

Parameters:

trainParams - The TrainingParameters to check for the trainer type. Note: The entry TrainingParameters.ALGORITHM_PARAM is used to determine the type.

reportMap - A Map that shall be used during initialization of the SequenceTrainer.

Returns:

A valid SequenceTrainer for the configured trainParams.

Throws:

IllegalArgumentException - Thrown if the trainer type could not be determined.

getEventModelSequenceTrainer

public static <T> EventModelSequenceTrainer<T> getEventModelSequenceTrainer(TrainingParameters trainParams,
 Map<String,String> reportMap)

Retrieves an EventModelSequenceTrainer that fits the given parameters.

Parameters:

trainParams - The TrainingParameters to check for the trainer type. Note: The entry TrainingParameters.ALGORITHM_PARAM is used to determine the type.

reportMap - A Map that shall be used during initialization of the EventModelSequenceTrainer.

Returns:

A valid EventModelSequenceTrainer for the configured trainParams.

Throws:

IllegalArgumentException - Thrown if the trainer type could not be determined.

getEventTrainer

public static EventTrainer getEventTrainer(TrainingParameters trainParams,
 Map<String,String> reportMap)

Retrieves an EventTrainer that fits the given parameters.

Parameters:

trainParams - The TrainingParameters to check for the trainer type. Note: The entry TrainingParameters.ALGORITHM_PARAM is used to determine the type. If the type is not defined, the GISTrainer.MAXENT_VALUE will be used.

reportMap - A Map that shall be used during initialization of the EventTrainer.

Returns:

A valid EventTrainer for the configured trainParams.

isValid

public static boolean isValid(TrainingParameters trainParams)

Parameters:

trainParams - The TrainingParameters to validate. Must not be null.

Returns:

true if the trainParams could be validated, false otherwise.