org.yuanheng.cookjson

Class BOM

java.lang.Object

org.yuanheng.cookjson.BOM

public class BOM
extends Object

BOM (Byte Order Mark) is used to indicate the encoding of the input.

This class does not actually read BOM. It guesses encoding based on the input pattern.

Author:

Heng Yuan

Field Summary

Fields

Modifier and Type	Field and Description
static Charset	utf16be
static Charset	utf16le
static Charset	utf32be
static Charset	utf32le
static Charset	utf8

Constructor Summary

Constructors

Constructor and Description
BOM()

Method Summary

Modifier and Type	Method and Description
static Charset	guessCharset(PushbackInputStream is) This function guess the encoding for a JSON file using a pattern.

Methods inherited from class java.lang.Object

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

Field Detail

utf8

public static final Charset utf8

utf16le

public static final Charset utf16le

utf16be

public static final Charset utf16be

utf32le

public static final Charset utf32le

utf32be

public static final Charset utf32be

Constructor Detail

BOM

public BOM()

Method Detail

guessCharset

public static Charset guessCharset(PushbackInputStream is)
                            throws IOException

This function guess the encoding for a JSON file using a pattern.

It should be noted that JSON (rfc4627) does not requires BOM. Instead, its encoding can be inferred from a pattern to determine if it is in utf-8, utf-16le, utf-16be, utf-32le or utf-32be.

Parameters:

is - a PushbackInputStream to allow bytes to be unread.

Returns:

the character set of the input stream.

Throws:

IOException - in case of I/O error.