org.apache.lucene.analysis.wikipedia

## Class WikipediaTokenizer

- java.lang.Object
- - org.apache.lucene.util.AttributeSource
  - - org.apache.lucene.analysis.TokenStream
    - - org.apache.lucene.analysis.Tokenizer
      - - org.apache.lucene.analysis.wikipedia.WikipediaTokenizer

- All Implemented Interfaces:
    Closeable, AutoCloseable

      public final class WikipediaTokenizer
      extends Tokenizer

  Extension of StandardTokenizer that is aware of Wikipedia syntax. It is based off of the Wikipedia tutorial available at http://en.wikipedia.org/wiki/Wikipedia:Tutorial, but it may not be complete.

  WARNING: This API is experimental and might change in incompatible ways in the next release.

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource

      `AttributeSource.AttributeFactory, AttributeSource.State`

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static int` | `ACRONYM_ID`
    `static int` | `ALPHANUM_ID`
    `static int` | `APOSTROPHE_ID`
    `static String` | `BOLD`
    `static int` | `BOLD_ID`
    `static String` | `BOLD_ITALICS`
    `static int` | `BOLD_ITALICS_ID`
    `static int` | `BOTH` Output the both the untokenized token and the splits
    `static String` | `CATEGORY`
    `static int` | `CATEGORY_ID`
    `static String` | `CITATION`
    `static int` | `CITATION_ID`
    `static int` | `CJ_ID`
    `static int` | `COMPANY_ID`
    `static int` | `EMAIL_ID`
    `static String` | `EXTERNAL_LINK`
    `static int` | `EXTERNAL_LINK_ID`
    `static String` | `EXTERNAL_LINK_URL`
    `static int` | `EXTERNAL_LINK_URL_ID`
    `static String` | `HEADING`
    `static int` | `HEADING_ID`
    `static int` | `HOST_ID`
    `static String` | `INTERNAL_LINK`
    `static int` | `INTERNAL_LINK_ID`
    `static String` | `ITALICS`
    `static int` | `ITALICS_ID`
    `static int` | `NUM_ID`
    `static String` | `SUB_HEADING`
    `static int` | `SUB_HEADING_ID`
    `static String[]` | `TOKEN_TYPES` String token types that correspond to token type int constants
    `static int` | `TOKENS_ONLY` Only output tokens
    `static int` | `UNTOKENIZED_ONLY` Only output untokenized tokens, which are tokens that would normally be split into several tokens
    `static int` | `UNTOKENIZED_TOKEN_FLAG` This flag is used to indicate that the produced "Token" would, if `TOKENS_ONLY` was used, produce multiple tokens.

    - ### Fields inherited from class org.apache.lucene.analysis.Tokenizer

      `input`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `WikipediaTokenizer(AttributeSource.AttributeFactory factory, Reader input, int tokenOutput, Set<String> untokenizedTypes)` Creates a new instance of the `WikipediaTokenizer`.
    `WikipediaTokenizer(AttributeSource source, Reader input, int tokenOutput, Set<String> untokenizedTypes)` Creates a new instance of the `WikipediaTokenizer`.
    `WikipediaTokenizer(Reader input)` Creates a new instance of the `WikipediaTokenizer`.
    `WikipediaTokenizer(Reader input, int tokenOutput, Set<String> untokenizedTypes)` Creates a new instance of the `WikipediaTokenizer`.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `end()`
    `boolean` | `incrementToken()`
    `void` | `reset()`

    - ### Methods inherited from class org.apache.lucene.analysis.Tokenizer

      `close, correctOffset, setReader`

    - ### Methods inherited from class org.apache.lucene.util.AttributeSource

      `addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, copyTo, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, reflectAsString, reflectWith, restoreState`

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

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

- - ### Field Detail

    - #### INTERNAL_LINK

          public static final String INTERNAL_LINK

      See Also:
        Constant Field Values

    - #### EXTERNAL_LINK

          public static final String EXTERNAL_LINK

      See Also:
        Constant Field Values

    - #### EXTERNAL_LINK_URL

          public static final String EXTERNAL_LINK_URL

      See Also:
        Constant Field Values

    - #### CITATION

          public static final String CITATION

      See Also:
        Constant Field Values

    - #### CATEGORY

          public static final String CATEGORY

      See Also:
        Constant Field Values

    - #### BOLD

          public static final String BOLD

      See Also:
        Constant Field Values

    - #### ITALICS

          public static final String ITALICS

      See Also:
        Constant Field Values

    - #### BOLD_ITALICS

          public static final String BOLD_ITALICS

      See Also:
        Constant Field Values

    - #### HEADING

          public static final String HEADING

      See Also:
        Constant Field Values

    - #### SUB_HEADING

          public static final String SUB_HEADING

      See Also:
        Constant Field Values

    - #### ALPHANUM_ID

          public static final int ALPHANUM_ID

      See Also:
        Constant Field Values

    - #### APOSTROPHE_ID

          public static final int APOSTROPHE_ID

      See Also:
        Constant Field Values

    - #### ACRONYM_ID

          public static final int ACRONYM_ID

      See Also:
        Constant Field Values

    - #### COMPANY_ID

          public static final int COMPANY_ID

      See Also:
        Constant Field Values

    - #### EMAIL_ID

          public static final int EMAIL_ID

      See Also:
        Constant Field Values

    - #### HOST_ID

          public static final int HOST_ID

      See Also:
        Constant Field Values

    - #### NUM_ID

          public static final int NUM_ID

      See Also:
        Constant Field Values

    - #### CJ_ID

          public static final int CJ_ID

      See Also:
        Constant Field Values

    - #### INTERNAL_LINK_ID

          public static final int INTERNAL_LINK_ID

      See Also:
        Constant Field Values

    - #### EXTERNAL_LINK_ID

          public static final int EXTERNAL_LINK_ID

      See Also:
        Constant Field Values

    - #### CITATION_ID

          public static final int CITATION_ID

      See Also:
        Constant Field Values

    - #### CATEGORY_ID

          public static final int CATEGORY_ID

      See Also:
        Constant Field Values

    - #### BOLD_ID

          public static final int BOLD_ID

      See Also:
        Constant Field Values

    - #### ITALICS_ID

          public static final int ITALICS_ID

      See Also:
        Constant Field Values

    - #### BOLD_ITALICS_ID

          public static final int BOLD_ITALICS_ID

      See Also:
        Constant Field Values

    - #### HEADING_ID

          public static final int HEADING_ID

      See Also:
        Constant Field Values

    - #### SUB_HEADING_ID

          public static final int SUB_HEADING_ID

      See Also:
        Constant Field Values

    - #### EXTERNAL_LINK_URL_ID

          public static final int EXTERNAL_LINK_URL_ID

      See Also:
        Constant Field Values

    - #### TOKEN_TYPES

          public static final String[] TOKEN_TYPES

      String token types that correspond to token type int constants

    - #### TOKENS_ONLY

          public static final int TOKENS_ONLY

      Only output tokens
      See Also:
        Constant Field Values

    - #### UNTOKENIZED_ONLY

          public static final int UNTOKENIZED_ONLY

      Only output untokenized tokens, which are tokens that would normally be split into several tokens
      See Also:
        Constant Field Values

    - #### BOTH

          public static final int BOTH

      Output the both the untokenized token and the splits
      See Also:
        Constant Field Values

    - #### UNTOKENIZED_TOKEN_FLAG

          public static final int UNTOKENIZED_TOKEN_FLAG

      This flag is used to indicate that the produced "Token" would, if `TOKENS_ONLY` was used, produce multiple tokens.
      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### WikipediaTokenizer

          public WikipediaTokenizer(Reader input)

      Creates a new instance of the `WikipediaTokenizer`. Attaches the `input` to a newly created JFlex scanner.
      Parameters:
        `input` - The Input Reader

    - #### WikipediaTokenizer

          public WikipediaTokenizer(Reader input,
                            int tokenOutput,
                            Set<String> untokenizedTypes)

      Creates a new instance of the `WikipediaTokenizer`. Attaches the `input` to a the newly created JFlex scanner.
      Parameters:
        `input` - The input
        `tokenOutput` - One of `TOKENS_ONLY`, `UNTOKENIZED_ONLY`, `BOTH`

    - #### WikipediaTokenizer

          public WikipediaTokenizer(AttributeSource.AttributeFactory factory,
                            Reader input,
                            int tokenOutput,
                            Set<String> untokenizedTypes)

      Creates a new instance of the `WikipediaTokenizer`. Attaches the `input` to a the newly created JFlex scanner. Uses the given `AttributeSource.AttributeFactory`.
      Parameters:
        `input` - The input
        `tokenOutput` - One of `TOKENS_ONLY`, `UNTOKENIZED_ONLY`, `BOTH`

    - #### WikipediaTokenizer

          public WikipediaTokenizer(AttributeSource source,
                            Reader input,
                            int tokenOutput,
                            Set<String> untokenizedTypes)

      Creates a new instance of the `WikipediaTokenizer`. Attaches the `input` to a the newly created JFlex scanner. Uses the given `AttributeSource`.
      Parameters:
        `input` - The input
        `tokenOutput` - One of `TOKENS_ONLY`, `UNTOKENIZED_ONLY`, `BOTH`

  - ### Method Detail

    - #### incrementToken

          public final boolean incrementToken()
                                       throws IOException

      Specified by:
        `incrementToken` in class `TokenStream`
      Throws:
        `IOException`

    - #### reset

          public void reset()
                     throws IOException

      Overrides:
        `reset` in class `TokenStream`
      Throws:
        `IOException`

    - #### end

          public void end()

      Overrides:
        `end` in class `TokenStream`

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