LemmaSampleStream (Apache OpenNLP Tools 1.9.5 API)
Date: 2026-06-18

opennlp.tools.lemmatizer

## Class LemmaSampleStream

- java.lang.Object
- - opennlp.tools.util.FilterObjectStream<String,LemmaSample>
  - - opennlp.tools.lemmatizer.LemmaSampleStream

- All Implemented Interfaces:
    AutoCloseable, ObjectStream<LemmaSample>

      public class LemmaSampleStream
      extends FilterObjectStream<String,LemmaSample>

  Reads data for training and testing the lemmatizer. The format consists of: word\tpostag\tlemma.
  Version:
    2016-02-16

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `LemmaSampleStream(ObjectStream<String> samples)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `LemmaSample` | `read()` Returns the next object.

    - ### Methods inherited from class opennlp.tools.util.FilterObjectStream

      `close, reset`

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### LemmaSampleStream

          public LemmaSampleStream(ObjectStream<String> samples)

  - ### Method Detail

    - #### read

          public LemmaSample read()
                           throws IOException

      Description copied from interface: `ObjectStream`
      Returns the next object. Calling this method repeatedly until it returns null will return each object from the underlying source exactly once.
      Returns:
        the next object or null to signal that the stream is exhausted
      Throws:
        `IOException` - if there is an error during reading

Copyright © 2026 The Apache Software Foundation. All rights reserved.