Package com.ibm.icu.charset

Class CharsetCESU8

java.lang.Object

java.nio.charset.Charset

com.ibm.icu.charset.CharsetICU

com.ibm.icu.charset.CharsetUTF8

com.ibm.icu.charset.CharsetCESU8

All Implemented Interfaces:

Comparable<Charset>

class CharsetCESU8
extends CharsetUTF8

The purpose of this class is to set isCESU8 to true in the super class, and to allow the Charset framework to open the variant UTF-8 converter without extra setup work. CESU-8 encodes/decodes supplementary characters as 6 bytes instead of the proper 4 bytes.

Nested Class Summary

Nested classes/interfaces inherited from class com.ibm.icu.charset.CharsetUTF8

CharsetUTF8.CharsetDecoderUTF8, CharsetUTF8.CharsetEncoderUTF8

Field Summary

Fields inherited from class com.ibm.icu.charset.CharsetICU

codepage, conversionType, hasFromUnicodeFallback, hasToUnicodeFallback, icuCanonicalName, maxBytesPerChar, maxCharsPerByte, minBytesPerChar, name, options, platform, ROUNDTRIP_AND_FALLBACK_SET, ROUNDTRIP_SET, subChar, subChar1, subCharLen, unicodeMask

Constructor Summary

Constructors

Constructor	Description
CharsetCESU8(String icuCanonicalName, String javaCanonicalName, String[] aliases)

Method Summary

Modifier and Type	Method	Description
(package private) void	getUnicodeSetImpl(UnicodeSet setFillIn, int which)	This follows ucnv.c method ucnv_detectUnicodeSignature() to detect the start of the stream for example U+FEFF (the Unicode BOM/signature character) that can be ignored.

Methods inherited from class com.ibm.icu.charset.CharsetUTF8

newDecoder, newEncoder

Methods inherited from class com.ibm.icu.charset.CharsetICU

contains, forNameICU, getCharset, getCompleteUnicodeSet, getNonSurrogateUnicodeSet, getUnicodeSet, isFixedWidth, isSurrogate

Methods inherited from class java.nio.charset.Charset

aliases, availableCharsets, canEncode, compareTo, decode, defaultCharset, displayName, displayName, encode, encode, equals, forName, forName, hashCode, isRegistered, isSupported, name, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

CharsetCESU8

public CharsetCESU8(String icuCanonicalName,
 String javaCanonicalName,
 String[] aliases)

Method Details

getUnicodeSetImpl

void getUnicodeSetImpl(UnicodeSet setFillIn,
 int which)

Description copied from class: CharsetICU

This follows ucnv.c method ucnv_detectUnicodeSignature() to detect the start of the stream for example U+FEFF (the Unicode BOM/signature character) that can be ignored. Detects Unicode signature byte sequences at the start of the byte stream and returns number of bytes of the BOM of the indicated Unicode charset. 0 is returned when no Unicode signature is recognized.

Overrides:

getUnicodeSetImpl in class CharsetUTF8