Package org.jboss.marshalling

Class UTFUtils

java.lang.Object

org.jboss.marshalling.UTFUtils

public final class UTFUtils
extends Object

Handy utility methods for dealing with strings in the modified UTF-8 format.

Method Summary

Modifier and Type	Method	Description
static long	getLongUTFLength(String s)	Get the number of bytes used by the modified UTF-8 encoded form of the given string.
static int	getShortUTFLength(String s)	Get the number of bytes used by the modified UTF-8 encoded form of the given string.
static String	readUTFBytes(ByteInput input, int len)	Read the given number of characters from the given byte input.
static String	readUTFBytesByByteCount(ByteInput input, long len)	Read the given number of characters from the given byte input.
static String	readUTFZBytes(ByteInput input)	Read a null-terminated modified UTF-8 string from the given byte input.
static void	writeUTFBytes(ByteOutput output, String s)	Write the modified UTF-8 form of the given string to the given output.

Methods inherited from class java.lang.Object

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

Method Details

getShortUTFLength

public static int getShortUTFLength(String s)
                             throws UTFDataFormatException

Get the number of bytes used by the modified UTF-8 encoded form of the given string. If the length is greater than 65536, an exception is thrown.

Parameters:

s - the string

Returns:

the length

Throws:

UTFDataFormatException - if the string is longer than 65536 characters

See Also:

• DataInput.readUTF()

getLongUTFLength

public static long getLongUTFLength(String s)

Get the number of bytes used by the modified UTF-8 encoded form of the given string.

Parameters:

s - the string

Returns:

the length

See Also:

• DataInput.readUTF()

writeUTFBytes

public static void writeUTFBytes(ByteOutput output,
 String s)
                          throws IOException

Write the modified UTF-8 form of the given string to the given output.

Parameters:

output - the output to write to

s - the string

Throws:

IOException - if an I/O error occurs

See Also:

• DataOutput.writeUTF(String)

readUTFBytes

public static String readUTFBytes(ByteInput input,
 int len)
                           throws IOException

Read the given number of characters from the given byte input. The length given is in characters, NOT in bytes.

Parameters:

input - the byte source

len - the number of characters to read

Returns:

the string

Throws:

IOException - if an I/O error occurs

See Also:

• DataInput.readUTF()

readUTFBytesByByteCount

public static String readUTFBytesByByteCount(ByteInput input,
 long len)
                                      throws IOException

Read the given number of characters from the given byte input. The length given is in bytes.

Parameters:

input - the byte source

len - the number of bytes to read

Returns:

the string

Throws:

IOException - if an I/O error occurs

See Also:

• DataInput.readUTF()

readUTFZBytes

public static String readUTFZBytes(ByteInput input)
                            throws IOException

Read a null-terminated modified UTF-8 string from the given byte input. Bytes are read until a 0 is found or until the end of the stream, whichever comes first.

Parameters:

input - the input

Returns:

the string

Throws:

IOException - if an I/O error occurs

See Also:

• DataInput.readUTF()