org.apache.lucene.analysis.icu.segmentation
Class DefaultICUTokenizerConfig

java.lang.Object
  org.apache.lucene.analysis.icu.segmentation.ICUTokenizerConfig
      org.apache.lucene.analysis.icu.segmentation.DefaultICUTokenizerConfig

public class DefaultICUTokenizerConfig
extends ICUTokenizerConfig

Default ICUTokenizerConfig that is generally applicable to many languages.

Generally tokenizes Unicode text according to UAX#29 (BreakIterator.getWordInstance(ULocale.ROOT)), but with the following tailorings:

• Thai text is broken into words with a DictionaryBasedBreakIterator
• Lao, Myanmar, and Khmer text is broken into syllables based on custom BreakIterator rules.
• Hebrew text has custom tailorings to handle special cases involving punctuation.

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

Field Summary

static String	WORD_HANGUL Token type for words containing Korean hangul
static String	WORD_HIRAGANA Token type for words containing Japanese hiragana
static String	WORD_IDEO Token type for words containing ideographic characters
static String	WORD_KATAKANA Token type for words containing Japanese katakana
static String	WORD_LETTER Token type for words that contain letters
static String	WORD_NUMBER Token type for words that appear to be numbers

Constructor Summary

DefaultICUTokenizerConfig()
Creates a new config.

Method Summary

com.ibm.icu.text.BreakIterator	getBreakIterator(int script) Return a breakiterator capable of processing a given script.
String	getType(int script, int ruleStatus) Return a token type value for a given script and BreakIterator rule status.

Methods inherited from class java.lang.Object

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

Field Detail

WORD_IDEO

public static final String WORD_IDEO

Token type for words containing ideographic characters

WORD_HIRAGANA

public static final String WORD_HIRAGANA

Token type for words containing Japanese hiragana

WORD_KATAKANA

public static final String WORD_KATAKANA

Token type for words containing Japanese katakana

WORD_HANGUL

public static final String WORD_HANGUL

Token type for words containing Korean hangul

WORD_LETTER

public static final String WORD_LETTER

Token type for words that contain letters

WORD_NUMBER

public static final String WORD_NUMBER

Token type for words that appear to be numbers

Constructor Detail

DefaultICUTokenizerConfig

public DefaultICUTokenizerConfig()

Creates a new config. This object is lightweight, but the first time the class is referenced, breakiterators will be initialized.

Method Detail

getBreakIterator

public com.ibm.icu.text.BreakIterator getBreakIterator(int script)

Description copied from class: ICUTokenizerConfig

Return a breakiterator capable of processing a given script.

Specified by:

getBreakIterator in class ICUTokenizerConfig

getType

public String getType(int script,
                      int ruleStatus)

Description copied from class: ICUTokenizerConfig

Return a token type value for a given script and BreakIterator rule status.

Specified by:

getType in class ICUTokenizerConfig