Class UnicodeSet.XSymbolTable

java.lang.Object
com.ibm.icu.text.UnicodeSet.XSymbolTable
All Implemented Interfaces:
SymbolTable
Enclosing class:
UnicodeSet

public abstract static class UnicodeSet.XSymbolTable extends Object implements SymbolTable
Internal class for customizing UnicodeSet parsing of properties. TODO: extend to allow customizing of codepoint ranges
Author:
medavis
  • Constructor Details

    • XSymbolTable

      public XSymbolTable()
      Default constructor
  • Method Details

    • lookupMatcher

      public UnicodeMatcher lookupMatcher(int i)
      Supplies default implementation for SymbolTable (no action).
      Specified by:
      lookupMatcher in interface SymbolTable
      Parameters:
      i - a 32-bit code point from 0 to 0x10FFFF inclusive.
      Returns:
      the UnicodeMatcher object represented by the given character, or null if there is no mapping for ch.
    • applyPropertyAlias

      public boolean applyPropertyAlias(String propertyName, String propertyValue, UnicodeSet result)
      Override the interpretation of the sequence [:propertyName=propertyValue:] (and its negated and Perl-style variant). The propertyName and propertyValue may be existing Unicode aliases, or may not be.

      This routine will be called whenever the parsing of a UnicodeSet pattern finds such a propertyName+propertyValue combination.

      Parameters:
      propertyName - the name of the property
      propertyValue - the name of the property value
      result - UnicodeSet value to change a set to which the characters having the propertyName+propertyValue are to be added.
      Returns:
      returns true if the propertyName+propertyValue combination is to be overridden, and the characters with that property have been added to the UnicodeSet, and returns false if the propertyName+propertyValue combination is not recognized (in which case result is unaltered).
    • lookup

      public char[] lookup(String s)
      Supplies default implementation for SymbolTable (no action).
      Specified by:
      lookup in interface SymbolTable
      Parameters:
      s - the symbolic name to lookup
      Returns:
      a char array containing the name's value, or null if there is no mapping for s.
    • parseReference

      public String parseReference(String text, ParsePosition pos, int limit)
      Supplies default implementation for SymbolTable (no action).
      Specified by:
      parseReference in interface SymbolTable
      Parameters:
      text - the text to parse for the name
      pos - on entry, the index of the first character to parse. This is the character following the SYMBOL_REF character. On exit, the index after the last parsed character. If the parse failed, pos is unchanged on exit.
      limit - the index after the last character to be parsed.
      Returns:
      the parsed name, or null if there is no valid symbolic name at the given position.