Package opennlp.tools.ml.model

Klasse RealValueFileEventStream

java.lang.Object

opennlp.tools.ml.model.FileEventStream

opennlp.tools.ml.model.RealValueFileEventStream

Alle implementierten Schnittstellen:

AutoCloseable, ObjectStream<Event>

public class RealValueFileEventStream
extends FileEventStream

Class for using a file of real-valued events as an event stream. The format of the file is one event per line with each line consisting of outcome followed by contexts (space delimited).

Siehe auch:

• Event
• FileEventStream

Konstruktorübersicht

Konstruktoren

Konstruktor	Beschreibung
RealValueFileEventStream(File file)	Instantiates a RealValueFileEventStream via a File.
RealValueFileEventStream(Reader reader)	Instantiates a RealValueFileEventStream via a Reader.
RealValueFileEventStream(String fileName)	Instantiates a RealValueFileEventStream from the specified file name.
RealValueFileEventStream(String fileName, String encoding)	Instantiates a RealValueFileEventStream from the specified file name.

Methodenübersicht

Modifizierer und Typ	Methode	Beschreibung
static float[]	parseContexts(String[] contexts)	Parses the specified contexts and re-populates context array with features and returns the values for these features.
Event	read()	Returns the next Event object.

Von Klasse geerbte Methoden opennlp.tools.ml.model.FileEventStream

close, reset, toLine

Von Klasse geerbte Methoden java.lang.Object

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

Konstruktordetails

RealValueFileEventStream

public RealValueFileEventStream(String fileName)
                         throws IOException

Instantiates a RealValueFileEventStream from the specified file name.

Parameter:

fileName - The name fo the file containing the events.

Löst aus:

IOException - Thrown if the specified file can not be read.

RealValueFileEventStream

public RealValueFileEventStream(String fileName,
 String encoding)
                         throws IOException

Instantiates a RealValueFileEventStream from the specified file name.

Parameter:

fileName - The name fo the file containing the events.

encoding - The name of the character encoding.

Löst aus:

IOException - Thrown if the specified file can not be read.

RealValueFileEventStream

public RealValueFileEventStream(File file)
                         throws IOException

Instantiates a RealValueFileEventStream via a File.

Parameter:

file - The File that holds events.

Löst aus:

IOException - Thrown if the specified file can not be read.

RealValueFileEventStream

public RealValueFileEventStream(Reader reader)
                         throws IOException

Instantiates a RealValueFileEventStream via a Reader.

Parameter:

reader - The Reader that holds events.

Löst aus:

IOException - Thrown if the specified file can not be read.

Methodendetails

parseContexts

public static float[] parseContexts(String[] contexts)

Parses the specified contexts and re-populates context array with features and returns the values for these features. If all values are unspecified, then null is returned.

Parameter:

contexts - The contexts with real values specified.

Gibt zurück:

The value for each context or null if all values are unspecified.

Löst aus:

RuntimeException - Thrown if negative real values are detected in the input data.

read

public Event read()
           throws IOException

Returns the next Event object. Calling this method repeatedly until it returns null will return each object from the underlying source exactly once.

Angegeben von:

read in Schnittstelle ObjectStream<Event>

Setzt außer Kraft:

read in Klasse FileEventStream

Gibt zurück:

The next object or null to signal that the stream is exhausted.

Löst aus:

IOException - Thrown if there is an error during reading.

RuntimeException - Thrown if negative real values are detected in the input data.