Package kvd.common

Class Utils

java.lang.Object

kvd.common.Utils

public class Utils
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final int	EOF

Constructor Summary

Constructors

Constructor	Description
Utils()

Method Summary

Modifier and Type	Method	Description
static void	checkKey(byte[] key)
static void	checkTimeout(long startNs, long timeoutSeconds)
static void	closeQuietly(AutoCloseable c)
static void	closeSocketQuietly(Socket socket)
static long	copyLarge(InputStream input, OutputStream output, byte[] buffer)	Copies bytes from a large (over 2GB) InputStream to an OutputStream.
static String	fromUTF8(byte[] buf)
static File	getUserHome()
static String	humanReadableByteCountBin(long bytes)
static String	humanReadableByteCountSI(long bytes)
static boolean	isBlank(CharSequence cs)
static boolean	isTimeout(long startNs, long timeoutSeconds)
static int	length(CharSequence cs)
static byte[]	toByteArray(InputStream input)
static Charset	toCharset(String charsetName)	Returns a Charset for the named charset.
static byte[]	toUTF8(String s)

Methods inherited from class java.lang.Object

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

Field Details

EOF

public static final int EOF

See Also:

• Constant Field Values

Constructor Details

Utils

public Utils()

Method Details

closeSocketQuietly

public static void closeSocketQuietly(Socket socket)

closeQuietly

public static void closeQuietly(AutoCloseable c)

isTimeout

public static boolean isTimeout(long startNs,
 long timeoutSeconds)

checkTimeout

public static void checkTimeout(long startNs,
 long timeoutSeconds)

toUTF8

public static byte[] toUTF8(String s)

fromUTF8

public static String fromUTF8(byte[] buf)

isBlank

public static boolean isBlank(CharSequence cs)

length

public static int length(CharSequence cs)

checkKey

public static void checkKey(byte[] key)

getUserHome

public static File getUserHome()

toCharset

public static Charset toCharset(String charsetName)

Returns a Charset for the named charset. If the name is null, return the default Charset.

Parameters:

charsetName - The name of the requested charset, may be null.

Returns:

a Charset for the named charset

Throws:

UnsupportedCharsetException - If the named charset is unavailable

copyLarge

public static long copyLarge(InputStream input,
 OutputStream output,
 byte[] buffer)
                      throws IOException

Copies bytes from a large (over 2GB) InputStream to an OutputStream.

This method uses the provided buffer, so there is no need to use a BufferedInputStream.

Parameters:

input - the InputStream to read from

output - the OutputStream to write to

buffer - the buffer to use for the copy

Returns:

the number of bytes copied. or 0 if input is null.

Throws:

IOException - if an I/O error occurs

Since:

2.2

toByteArray

public static byte[] toByteArray(InputStream input)
                          throws IOException

Throws:

IOException

humanReadableByteCountSI

public static String humanReadableByteCountSI(long bytes)

humanReadableByteCountBin

public static String humanReadableByteCountBin(long bytes)