com.ibm.icu.text

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

Field Summary

Fields inherited from interface com.ibm.icu.text.SymbolTable

SYMBOL_REF

Constructor Summary

Constructors

Constructor and Description
XSymbolTable() Default constructor

Method Summary

Modifier and Type	Method and Description
boolean	applyPropertyAlias(String propertyName, String propertyValue, UnicodeSet result) Override the interpretation of the sequence [:propertyName=propertyValue:] (and its negated and Perl-style variant).
char[]	lookup(String s) Supplies default implementation for SymbolTable (no action).
UnicodeMatcher	lookupMatcher(int i) Supplies default implementation for SymbolTable (no action).
String	parseReference(String text, ParsePosition pos, int limit) Supplies default implementation for SymbolTable (no action).

Methods inherited from class java.lang.Object

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

Constructor Detail

XSymbolTable

public XSymbolTable()

Default constructor

Method Detail

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.