Package org.apache.lucene.analysis.cn.smart

Class Utility

java.lang.Object
org.apache.lucene.analysis.cn.smart.Utility
public class Utility extends Object
SmartChineseAnalyzer utility constants and methods
WARNING: This API is experimental and might change in incompatible ways in the next release.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final char[]
    COMMON_DELIMITER
    Delimiters will be filtered to this character by SegTokenFilter
    static final char[]
    END_CHAR_ARRAY
     
    static final int
    MAX_FREQUENCE
    Maximum bigram frequency (used in the smoothing function).
    static final char[]
    NUMBER_CHAR_ARRAY
     
    static final String
    SPACES
    Space-like characters that need to be skipped: such as space, tab, newline, carriage return.
    static final char[]
    START_CHAR_ARRAY
     
    static final char[]
    STRING_CHAR_ARRAY
     

  • Constructor Summary

    Constructors
    Constructor
    Description
    Utility()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static int
    compareArray(char[] larray, int lstartIndex, char[] rarray, int rstartIndex)
    compare two arrays starting at the specified offsets.
    static int
    compareArrayByPrefix(char[] shortArray, int shortIndex, char[] longArray, int longIndex)
    Compare two arrays, starting at the specified offsets, but treating shortArray as a prefix to longArray.
    static int
    getCharType(char ch)
    Return the internal CharType constant of a given character.

    Methods inherited from class java.lang.Object

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

  • Field Details

    • STRING_CHAR_ARRAY

      public static final char[] STRING_CHAR_ARRAY

    • NUMBER_CHAR_ARRAY

      public static final char[] NUMBER_CHAR_ARRAY

    • START_CHAR_ARRAY

      public static final char[] START_CHAR_ARRAY

    • END_CHAR_ARRAY

      public static final char[] END_CHAR_ARRAY

    • COMMON_DELIMITER

      public static final char[] COMMON_DELIMITER
      Delimiters will be filtered to this character by SegTokenFilter

    • SPACES

      public static final String SPACES
      Space-like characters that need to be skipped: such as space, tab, newline, carriage return.
      See Also:

    • MAX_FREQUENCE

      public static final int MAX_FREQUENCE
      Maximum bigram frequency (used in the smoothing function).
      See Also:

  • Constructor Details

    • Utility

      public Utility()

  • Method Details

    • compareArray

      public static int compareArray(char[] larray, int lstartIndex, char[] rarray, int rstartIndex)
      compare two arrays starting at the specified offsets.
      Parameters:
      larray - left array
      lstartIndex - start offset into larray
      rarray - right array
      rstartIndex - start offset into rarray
      Returns:
      0 if the arrays are equal，1 if larray > rarray, -1 if larray < rarray

    • compareArrayByPrefix

      public static int compareArrayByPrefix(char[] shortArray, int shortIndex, char[] longArray, int longIndex)
      Compare two arrays, starting at the specified offsets, but treating shortArray as a prefix to longArray. As long as shortArray is a prefix of longArray, return 0. Otherwise, behave as compareArray(char[], int, char[], int)
      Parameters:
      shortArray - prefix array
      shortIndex - offset into shortArray
      longArray - long array (word)
      longIndex - offset into longArray
      Returns:
      0 if shortArray is a prefix of longArray, otherwise act as compareArray(char[], int, char[], int)

    • getCharType

      public static int getCharType(char ch)
      Return the internal CharType constant of a given character.
      Parameters:
      ch - input character
      Returns:
      constant from CharType describing the character type.
      See Also: