java.lang.Object
- java.lang.Enum<EUnicodeBOM>
- - com.helger.commons.charset.EUnicodeBOM

All Implemented Interfaces:

Serializable, Comparable<EUnicodeBOM>
```
public enum EUnicodeBOM
extends Enum<EUnicodeBOM>
```
Defines the most common Byte Order Markers for Unicode encoded text files.
Source: http://de.wikipedia.org/wiki/Byte_Order_Mark
Important: BOMS with more bytes should come first to avoid wrong detections.
Note: SCSU = A Standard Compression Scheme for Unicode: http://www.unicode.org/reports/tr6/
Note: BOCU = Binary Ordered Compression for Unicode

Author:

Philip Helger

Enum Constant Summary

Enum Constants
Enum Constant	Description
`BOM_BOCU_1`	BOCU
`BOM_BOCU_1_ALT2`	BOCU
`BOM_GB_18030`	GB 18030
`BOM_SCSU`	SCSU - Single-byte mode Quote Unicode
`BOM_SCSU_TO_UCS`	SCSU - Single-byte mode Change to Unicode
`BOM_SCSU_W0_TO_FE80`	SCSU - Single-byte mode Define dynamic window 0 to 0xFE80
`BOM_SCSU_W1_TO_FE80`	SCSU - Single-byte mode Define dynamic window 1 to 0xFE80
`BOM_SCSU_W2_TO_FE80`	SCSU - Single-byte mode Define dynamic window 2 to 0xFE80
`BOM_SCSU_W3_TO_FE80`	SCSU - Single-byte mode Define dynamic window 3 to 0xFE80
`BOM_SCSU_W4_TO_FE80`	SCSU - Single-byte mode Define dynamic window 4 to 0xFE80
`BOM_SCSU_W5_TO_FE80`	SCSU - Single-byte mode Define dynamic window 5 to 0xFE80
`BOM_SCSU_W6_TO_FE80`	SCSU - Single-byte mode Define dynamic window 6 to 0xFE80
`BOM_SCSU_W7_TO_FE80`	SCSU - Single-byte mode Define dynamic window 7 to 0xFE80
`BOM_UTF_1`	UTF-1
`BOM_UTF_16_BIG_ENDIAN`	UTF-16 Big Endian
`BOM_UTF_16_LITTLE_ENDIAN`	UTF-16 Little Endian
`BOM_UTF_32_BIG_ENDIAN`	UTF-32 Big Endian
`BOM_UTF_32_LITTLE_ENDIAN`	UTF-32 Little Endian
`BOM_UTF_7`	UTF-7
`BOM_UTF_7_ALT2`	UTF-7
`BOM_UTF_7_ALT3`	UTF-7
`BOM_UTF_7_ALT4`	UTF-7
`BOM_UTF_8`	UTF-8
`BOM_UTF_EBCDIC`	UTF-EBCDIC

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`byte[]`	`getAllBytes()`
`int`	`getByteCount()`
`Charset`	`getCharset()`
`String`	`getCharsetName()`
`static EUnicodeBOM`	`getFromBytesOrNull(byte[] aBytes)`	Find the BOM that is matching the passed byte array.
`static int`	`getMaximumByteCount()`
`boolean`	`hasCharset()`
`boolean`	`isPresent(byte[] aBytes)`	Check if the passed byte array starts with this BOM's bytes.
`static EUnicodeBOM`	`valueOf(String name)`	Returns the enum constant of this type with the specified name.
`static EUnicodeBOM[]`	`values()`	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum
clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

- Enum Constant Detail
  - BOM_UTF_32_BIG_ENDIAN
```
public static final EUnicodeBOM BOM_UTF_32_BIG_ENDIAN
```
    UTF-32 Big Endian
  - BOM_UTF_32_LITTLE_ENDIAN
```
public static final EUnicodeBOM BOM_UTF_32_LITTLE_ENDIAN
```
    UTF-32 Little Endian
  - BOM_UTF_7
```
public static final EUnicodeBOM BOM_UTF_7
```
    UTF-7
  - BOM_UTF_7_ALT2
```
public static final EUnicodeBOM BOM_UTF_7_ALT2
```
    UTF-7
  - BOM_UTF_7_ALT3
```
public static final EUnicodeBOM BOM_UTF_7_ALT3
```
    UTF-7
  - BOM_UTF_7_ALT4
```
public static final EUnicodeBOM BOM_UTF_7_ALT4
```
    UTF-7
  - BOM_UTF_EBCDIC
```
public static final EUnicodeBOM BOM_UTF_EBCDIC
```
    UTF-EBCDIC
  - BOM_BOCU_1_ALT2
```
public static final EUnicodeBOM BOM_BOCU_1_ALT2
```
    BOCU
  - BOM_GB_18030
```
public static final EUnicodeBOM BOM_GB_18030
```
    GB 18030
  - BOM_UTF_8
```
public static final EUnicodeBOM BOM_UTF_8
```
    UTF-8
  - BOM_UTF_1
```
public static final EUnicodeBOM BOM_UTF_1
```
    UTF-1
  - BOM_BOCU_1
```
public static final EUnicodeBOM BOM_BOCU_1
```
    BOCU
  - BOM_SCSU
```
public static final EUnicodeBOM BOM_SCSU
```
    SCSU - Single-byte mode Quote Unicode
  - BOM_SCSU_TO_UCS
```
public static final EUnicodeBOM BOM_SCSU_TO_UCS
```
    SCSU - Single-byte mode Change to Unicode
  - BOM_SCSU_W0_TO_FE80
```
public static final EUnicodeBOM BOM_SCSU_W0_TO_FE80
```
    SCSU - Single-byte mode Define dynamic window 0 to 0xFE80
  - BOM_SCSU_W1_TO_FE80
```
public static final EUnicodeBOM BOM_SCSU_W1_TO_FE80
```
    SCSU - Single-byte mode Define dynamic window 1 to 0xFE80
  - BOM_SCSU_W2_TO_FE80
```
public static final EUnicodeBOM BOM_SCSU_W2_TO_FE80
```
    SCSU - Single-byte mode Define dynamic window 2 to 0xFE80
  - BOM_SCSU_W3_TO_FE80
```
public static final EUnicodeBOM BOM_SCSU_W3_TO_FE80
```
    SCSU - Single-byte mode Define dynamic window 3 to 0xFE80
  - BOM_SCSU_W4_TO_FE80
```
public static final EUnicodeBOM BOM_SCSU_W4_TO_FE80
```
    SCSU - Single-byte mode Define dynamic window 4 to 0xFE80
  - BOM_SCSU_W5_TO_FE80
```
public static final EUnicodeBOM BOM_SCSU_W5_TO_FE80
```
    SCSU - Single-byte mode Define dynamic window 5 to 0xFE80
  - BOM_SCSU_W6_TO_FE80
```
public static final EUnicodeBOM BOM_SCSU_W6_TO_FE80
```
    SCSU - Single-byte mode Define dynamic window 6 to 0xFE80
  - BOM_SCSU_W7_TO_FE80
```
public static final EUnicodeBOM BOM_SCSU_W7_TO_FE80
```
    SCSU - Single-byte mode Define dynamic window 7 to 0xFE80
  - BOM_UTF_16_BIG_ENDIAN
```
public static final EUnicodeBOM BOM_UTF_16_BIG_ENDIAN
```
    UTF-16 Big Endian
  - BOM_UTF_16_LITTLE_ENDIAN
```
public static final EUnicodeBOM BOM_UTF_16_LITTLE_ENDIAN
```
    UTF-16 Little Endian
- Method Detail
  - values
```
public static EUnicodeBOM[] values()
```
    Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
    for (EUnicodeBOM c : EUnicodeBOM.values()) System.out.println(c);
    Returns:
    
    an array containing the constants of this enum type, in the order they are declared
  - valueOf
```
public static EUnicodeBOM valueOf(String name)
```
    Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
    
    Parameters:
    
    name - the name of the enum constant to be returned.
    
    Returns:
    
    the enum constant with the specified name
    
    Throws:
    
    IllegalArgumentException - if this enum type has no constant with the specified name
    
    NullPointerException - if the argument is null
  - getAllBytes
```
@Nonnull
@Nonempty
@ReturnsMutableCopy
public byte[] getAllBytes()
```
    Returns:
    
    A copy of the byte array that identifies this BOM.
  - getByteCount
```
@Nonnegative
public int getByteCount()
```
    Returns:
    
    The number of bytes defining this BOM
  - isPresent
```
public boolean isPresent(@Nullable
                         byte[] aBytes)
```
    Check if the passed byte array starts with this BOM's bytes.
    
    Parameters:
    
    aBytes - The byte array to search for a BOM. May be null or empty.
    
    Returns:
    
    true if the passed byte array starts with this BOM, false otherwise.
  - getCharsetName
```
@Nullable
public String getCharsetName()
```
    Returns:
    
    The name of the charset. This may be null if no known charset exists for Java. This string may be present, even if getCharset() returns null. To support e.g. "utf-7" you need to add additional JAR files.
  - getCharset
```
@Nullable
public Charset getCharset()
```
    Returns:
    
    The charset matching this BOM. May be null if the charset is not part of the Sun JDK or there is not even a defined charset.
  - hasCharset
```
public boolean hasCharset()
```
    Returns:
    
    true if this BOM has an assigned charset, false if not.
    
    Since:
    
    9.0.0
    
    See Also:
    
    getCharset()
  - getMaximumByteCount
```
@Nonnegative
public static int getMaximumByteCount()
```
    Returns:
    
    The maximum number of bytes a BOM may have.
  - getFromBytesOrNull
```
@Nullable
public static EUnicodeBOM getFromBytesOrNull(@Nullable
                                             byte[] aBytes)
```
    Find the BOM that is matching the passed byte array.
    
    Parameters:
    
    aBytes - The bytes to be checked for the BOM. May be null. To check all BOMs, this array must have at least 4 (= getMaximumByteCount()) bytes.
    
    Returns:
    
    null if the passed bytes do not resemble a BOM.

Enum EUnicodeBOM

Enum Constant Summary

Method Summary

Methods inherited from class java.lang.Enum

Methods inherited from class java.lang.Object

Enum Constant Detail

BOM_UTF_32_BIG_ENDIAN

BOM_UTF_32_LITTLE_ENDIAN

BOM_UTF_7

BOM_UTF_7_ALT2

BOM_UTF_7_ALT3

BOM_UTF_7_ALT4

BOM_UTF_EBCDIC

BOM_BOCU_1_ALT2

BOM_GB_18030

BOM_UTF_8

BOM_UTF_1

BOM_BOCU_1

BOM_SCSU

BOM_SCSU_TO_UCS

BOM_SCSU_W0_TO_FE80

BOM_SCSU_W1_TO_FE80

BOM_SCSU_W2_TO_FE80

BOM_SCSU_W3_TO_FE80

BOM_SCSU_W4_TO_FE80

BOM_SCSU_W5_TO_FE80

BOM_SCSU_W6_TO_FE80

BOM_SCSU_W7_TO_FE80

BOM_UTF_16_BIG_ENDIAN

BOM_UTF_16_LITTLE_ENDIAN

Method Detail

values

valueOf

getAllBytes

getByteCount

isPresent

getCharsetName

getCharset

hasCharset

getMaximumByteCount

getFromBytesOrNull