org.sindice.siren.util

Class CodecUtils

java.lang.Object

org.sindice.siren.util.CodecUtils

public class CodecUtils
extends Object

Contains methods to encode an integer into a byte array and decode a byte array into an integer.

Constructor Summary

Constructors

Constructor and Description
CodecUtils()

Method Summary

Methods

Modifier and Type	Method and Description
static void	appendVInt(int i, org.apache.lucene.util.BytesRef ref) Writes an integer in a variable-length format.
static int	byteArrayToInt(byte[] src, int offset) Convert a byte array to an int (32bit word).
static int	byteArrayToVInt(org.apache.lucene.util.BytesRef ref) Reads an int stored in variable-length format.
static void	intToByteArray(int x, byte[] dst, int offset) Convert an integer to a byte array.
static void	vIntToByteArray(int i, ByteBuffer bb) Writes an integer in a variable-length format.
static void	writeBytes(byte[] array) Display the content, i.e.
static void	writeIndentBytes(byte[] array) Display the content, i.e.

Methods inherited from class java.lang.Object

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

Constructor Detail

CodecUtils

public CodecUtils()

Method Detail

byteArrayToInt

public static int byteArrayToInt(byte[] src,
                 int offset)

Convert a byte array to an int (32bit word).

Parameters:

src - The byte array (length = 4)

offset - The offset of the encoded integer in the byte array

Returns:

The integer

intToByteArray

public static final void intToByteArray(int x,
                  byte[] dst,
                  int offset)

Convert an integer to a byte array.

Parameters:

x - The integer

dst - The byte array (length = 4)

offset - The offset of the encoded integer in the byte array

vIntToByteArray

public static void vIntToByteArray(int i,
                   ByteBuffer bb)

Writes an integer in a variable-length format. Writes between one and five bytes. Smaller values take fewer bytes. Negative numbers are not supported.

See Also:

DataInput.readVInt()

byteArrayToVInt

public static int byteArrayToVInt(org.apache.lucene.util.BytesRef ref)

Reads an int stored in variable-length format. Reads between one and five bytes. Smaller values take fewer bytes. Negative numbers are not supported.

appendVInt

public static void appendVInt(int i,
              org.apache.lucene.util.BytesRef ref)

Writes an integer in a variable-length format. Writes between one and five bytes. Smaller values take fewer bytes. Negative numbers are not supported.

See Also:

DataInput.readVInt()

writeBytes

public static void writeBytes(byte[] array)

Display the content, i.e. bits, of a byte array. Write to stdout the content of the array on a single line.
Code taken from Lucene-1410.

Parameters:

array - The byte array

writeIndentBytes

public static void writeIndentBytes(byte[] array)

Display the content, i.e. bits, of a byte array. Write to stdout 4 bytes per lines.
Code taken from Lucene-1410.

Parameters:

array - The byte array