org.apache.lucene.analysis.util

## Class TokenizerFactory

- java.lang.Object
- - org.apache.lucene.analysis.util.AbstractAnalysisFactory
  - - org.apache.lucene.analysis.util.TokenizerFactory

- Direct Known Subclasses:
    ClassicTokenizerFactory, EdgeNGramTokenizerFactory, KeywordTokenizerFactory, LetterTokenizerFactory, LowerCaseTokenizerFactory, NGramTokenizerFactory, PathHierarchyTokenizerFactory, PatternTokenizerFactory, StandardTokenizerFactory, ThaiTokenizerFactory, UAX29URLEmailTokenizerFactory, WhitespaceTokenizerFactory, WikipediaTokenizerFactory

      public abstract class TokenizerFactory
      extends AbstractAnalysisFactory

  Abstract parent class for analysis factories that create `Tokenizer` instances.

- - ### Field Summary

    - ### Fields inherited from class org.apache.lucene.analysis.util.AbstractAnalysisFactory

      `LUCENE_MATCH_VERSION_PARAM, luceneMatchVersion`

  - ### Constructor Summary

    Constructors
    Modifier | Constructor and Description
    --- | ---
    `protected` | `TokenizerFactory(Map<String,String> args)` Initialize this factory via a set of key-value pairs.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `static Set<String>` | `availableTokenizers()` returns a list of all available tokenizer names from context classpath
    `Tokenizer` | `create()` Creates a TokenStream of the specified input using the default attribute factory.
    `abstract Tokenizer` | `create(AttributeFactory factory)` Creates a TokenStream of the specified input using the given AttributeFactory
    `static TokenizerFactory` | `forName(String name, Map<String,String> args)` looks up a tokenizer by name from context classpath
    `static Class<? extends TokenizerFactory>` | `lookupClass(String name)` looks up a tokenizer class by name from context classpath
    `static void` | `reloadTokenizers(ClassLoader classloader)` Reloads the factory list from the given `ClassLoader`.

    - ### Methods inherited from class org.apache.lucene.analysis.util.AbstractAnalysisFactory

      `get, get, get, get, get, getBoolean, getChar, getClassArg, getFloat, getInt, getLines, getLuceneMatchVersion, getOriginalArgs, getPattern, getSet, getSnowballWordSet, getWordSet, isExplicitLuceneMatchVersion, require, require, require, requireBoolean, requireChar, requireFloat, requireInt, setExplicitLuceneMatchVersion, splitFileNames`

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

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

- - ### Constructor Detail

    - #### TokenizerFactory

          protected TokenizerFactory(Map<String,String> args)

      Initialize this factory via a set of key-value pairs.

  - ### Method Detail

    - #### forName

          public static TokenizerFactory forName(String name,
                                 Map<String,String> args)

      looks up a tokenizer by name from context classpath

    - #### lookupClass

          public static Class<? extends TokenizerFactory> lookupClass(String name)

      looks up a tokenizer class by name from context classpath

    - #### availableTokenizers

          public static Set<String> availableTokenizers()

      returns a list of all available tokenizer names from context classpath

    - #### reloadTokenizers

          public static void reloadTokenizers(ClassLoader classloader)

      Reloads the factory list from the given `ClassLoader`. Changes to the factories are visible after the method ends, all iterators (`availableTokenizers()`,...) stay consistent.

      NOTE: Only new factories are added, existing ones are never removed or replaced.

      This method is expensive and should only be called for discovery of new factories on the given classpath/classloader!

    - #### create

          public final Tokenizer create()

      Creates a TokenStream of the specified input using the default attribute factory.

    - #### create

          public abstract Tokenizer create(AttributeFactory factory)

      Creates a TokenStream of the specified input using the given AttributeFactory

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