org.trafodion.dcs.util

Class ByteBufferUtils

java.lang.Object

org.trafodion.dcs.util.ByteBufferUtils

public class ByteBufferUtils
extends Object

Method Summary

Methods

Modifier and Type	Method and Description
static ByteBuffer	allocate(int capacity, boolean direct) Allocate ByteBuffer.
static String	charsetToString(int charset)
static byte[]	extractByteArray(ByteBuffer buf)
static byte[]	extractByteArrayLen(ByteBuffer buf, int len)
static byte[]	extractByteString(ByteBuffer buf)
static String	extractShortString(ByteBuffer buf)
static String	extractString(ByteBuffer buf)
static String	extractStringWithCharset(ByteBuffer buf)
static long	extractUInt(ByteBuffer buf)
static int	extractUShort(ByteBuffer buf)
static ByteBuffer	gather(ByteBuffer[] buffers) Gather ByteBuffers to one ByteBuffer.
static boolean	hasRemaining(ByteBuffer[] buffers) Judge ByteBuffers have remaining bytes.
static ByteBuffer	increaseCapacity(ByteBuffer buffer, int size) Increase ByteBuffer's capacity.
static int	indexOf(ByteBuffer buffer, ByteBuffer pattern) Returns the index within this buffer of the first occurrence of the specified pattern buffer.
static void	insertByteArray(byte[] array, ByteBuffer buf)
static void	insertByteArray(byte[] value, int len, ByteBuffer buf)
static void	insertByteString(byte[] array, ByteBuffer buf)
static void	insertString(String str, ByteBuffer buf)
static void	insertStringWithCharset(byte[] str, int charset, ByteBuffer buf)
static void	insertUInt(long value, ByteBuffer buf)
static int	lengthOfByteArray(byte[] array)
static int	lengthOfByteString(byte[] array)
static int	lengthOfString(String str)
static int	lengthOfStringWithCharset(byte[] array)
static void	printBBInfo(ByteBuffer buf)
static void	toHexString(String header, ByteBuffer buf)
static void	toHexString(String header, ByteBuffer buf, int length)

Methods inherited from class java.lang.Object

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

Method Detail

allocate

public static ByteBuffer allocate(int capacity,
                  boolean direct)
                           throws IllegalArgumentException

Allocate ByteBuffer.

Parameters:

capacity - ByteBuffer capacity

direct - allocate DirectByteBuffer

Returns:

allocated ByteBuffer

Throws:

IllegalArgumentException - if capacity is negative

increaseCapacity

public static ByteBuffer increaseCapacity(ByteBuffer buffer,
                          int size)
                                   throws IllegalArgumentException

Increase ByteBuffer's capacity.

Parameters:

buffer - the ByteBuffer want to increase capacity

size - increased size

Returns:

increased capacity ByteBuffer

Throws:

IllegalArgumentException - if size less than 0 or buffer is null

gather

public static ByteBuffer gather(ByteBuffer[] buffers)

Gather ByteBuffers to one ByteBuffer.

Parameters:

buffers - ByteBuffers

Returns:

the gather ByteBuffer

hasRemaining

public static boolean hasRemaining(ByteBuffer[] buffers)

Judge ByteBuffers have remaining bytes.

Parameters:

buffers - ByteBuffers

Returns:

have remaining

indexOf

public static int indexOf(ByteBuffer buffer,
          ByteBuffer pattern)

Returns the index within this buffer of the first occurrence of the specified pattern buffer.

Parameters:

buffer - the buffer

pattern - the pattern buffer

Returns:

the position within the buffer of the first occurrence of the pattern buffer

toHexString

public static void toHexString(String header,
               ByteBuffer buf)

toHexString

public static void toHexString(String header,
               ByteBuffer buf,
               int length)

extractString

public static String extractString(ByteBuffer buf)
                            throws UnsupportedEncodingException

Throws:

UnsupportedEncodingException

extractStringWithCharset

public static String extractStringWithCharset(ByteBuffer buf)
                                       throws UnsupportedEncodingException

Throws:

UnsupportedEncodingException

extractByteString

public static byte[] extractByteString(ByteBuffer buf)

extractByteArray

public static byte[] extractByteArray(ByteBuffer buf)

extractUShort

public static int extractUShort(ByteBuffer buf)

extractUInt

public static long extractUInt(ByteBuffer buf)

extractByteArrayLen

public static byte[] extractByteArrayLen(ByteBuffer buf,
                         int len)

extractShortString

public static String extractShortString(ByteBuffer buf)
                                 throws UnsupportedEncodingException

Throws:

UnsupportedEncodingException

insertString

public static void insertString(String str,
                ByteBuffer buf)
                         throws UnsupportedEncodingException

Throws:

UnsupportedEncodingException

insertByteString

public static void insertByteString(byte[] array,
                    ByteBuffer buf)
                             throws UnsupportedEncodingException

Throws:

UnsupportedEncodingException

insertStringWithCharset

public static void insertStringWithCharset(byte[] str,
                           int charset,
                           ByteBuffer buf)
                                    throws UnsupportedEncodingException

Throws:

UnsupportedEncodingException

insertByteArray

public static void insertByteArray(byte[] array,
                   ByteBuffer buf)

insertByteArray

public static void insertByteArray(byte[] value,
                   int len,
                   ByteBuffer buf)

insertUInt

public static void insertUInt(long value,
              ByteBuffer buf)

lengthOfString

public static int lengthOfString(String str)

lengthOfByteString

public static int lengthOfByteString(byte[] array)

lengthOfStringWithCharset

public static int lengthOfStringWithCharset(byte[] array)

lengthOfByteArray

public static int lengthOfByteArray(byte[] array)

printBBInfo

public static void printBBInfo(ByteBuffer buf)

charsetToString

public static String charsetToString(int charset)