Package org.apache.lucene.analysis.hunspell

# Class Hunspell

java.lang.Object
org.apache.lucene.analysis.hunspell.Hunspell

public class Hunspell extends Object
A spell checker based on Hunspell dictionaries. This class can be used in place of native Hunspell for many languages for spell-checking and suggesting purposes. Note that not all languages are supported yet. For example:

- Hungarian (as it doesn't only rely on dictionaries, but has some logic directly in the source code
- Languages with Unicode characters outside of the Basic Multilingual Plane
- PHONE affix file option for suggestions

The objects of this class are thread-safe.

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `Hunspell(Dictionary dictionary)`
  `Hunspell(Dictionary dictionary, TimeoutPolicy policy, Runnable checkCanceled)`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `List<AffixedWord>`
  `analyzeSimpleWord(String word)`
  `EntrySuggestion`
  `compress(List<String> words)`
  Given a list of words, try to produce a smaller set of dictionary entries (with some flags) that would generate these words.
  `List<AffixedWord>`
  `getAllWordForms(String root)`
  Generate all word forms for all dictionary entries with the given root word.
  `List<String>`
  `getRoots(String word)`
  Find all roots that could result in the given word after case conversion and adding affixes.
  `boolean`
  `spell(String word)`
  `List<String>`
  `suggest(String word)`
  `List<String>`
  `suggest(String word, long timeLimitMs)`

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

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

- ## Constructor Details

  - ### Hunspell

    public Hunspell(Dictionary dictionary)

  - ### Hunspell

    public Hunspell(Dictionary dictionary, TimeoutPolicy policy, Runnable checkCanceled)
    Parameters:
      `policy` - a strategy determining what to do when API calls take too much time
      `checkCanceled` - an object that's periodically called, allowing to interrupt spell-checking or suggestion generation by throwing an exception

- ## Method Details

  - ### spell

    public boolean spell(String word)
    Returns:
      whether the given word's spelling is considered correct according to Hunspell rules

  - ### getRoots

    public List<String> getRoots(String word)
    Find all roots that could result in the given word after case conversion and adding affixes. This corresponds to the original `hunspell -s` (stemming) functionality.

    Some affix rules are relaxed in this stemming process: e.g. explicitly forbidden words are still returned. Some of the returned roots may be synthetic and not directly occur in the *.dic file (but differ from some existing entries in case). No roots are returned for compound words.

    The returned roots may be used to retrieve morphological data via `Dictionary.lookupEntries(java.lang.String)`.

  - ### analyzeSimpleWord

    public List<AffixedWord> analyzeSimpleWord(String word)
    Returns:
      all possible analyses of the given word with stems, prefixes, suffixed and morphological data. Note that the order of the returned objects might not correspond to the *.dic file order!

  - ### getAllWordForms

    public List<AffixedWord> getAllWordForms(String root)
    Generate all word forms for all dictionary entries with the given root word. The result order is stable but not specified. This is equivalent to "unmunch" from the "hunspell-tools" package.
    See Also:
      - `for finer-grained APIs`

  - ### compress

    public EntrySuggestion compress(List<String> words)
    Given a list of words, try to produce a smaller set of dictionary entries (with some flags) that would generate these words. This is equivalent to "munch" from the "hunspell-tools" package.
    See Also:
      - `for more details and control`

  - ### suggest

    public List<String> suggest(String word) throws SuggestionTimeoutException
    Returns:
      suggestions for the given misspelled word
    Throws:
      `SuggestionTimeoutException` - if the computation takes too long and `TimeoutPolicy.THROW_EXCEPTION` was specified in the constructor
    See Also:
      - `for finer-grained APIs and performance optimizations`

  - ### suggest

    public List<String> suggest(String word, long timeLimitMs) throws SuggestionTimeoutException
    Parameters:
      `word` - the misspelled word to calculate suggestions for
      `timeLimitMs` - the duration limit in milliseconds, after which the associated `TimeoutPolicy`'s effects (exception or partial result) may kick in
    Throws:
      `SuggestionTimeoutException` - if the computation takes too long and `TimeoutPolicy.THROW_EXCEPTION` was specified in the constructor
    See Also:
      - `for finer-grained APIs and performance optimizations`