org.iq80.snappy

Class Snappy

java.lang.Object

org.iq80.snappy.Snappy

public final class Snappy
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static int	COPY_1_BYTE_OFFSET
(package private) static int	COPY_2_BYTE_OFFSET
(package private) static int	COPY_4_BYTE_OFFSET
(package private) static int	LITERAL
private static int	MAX_HEADER_LENGTH

Constructor Summary

Constructors

Modifier	Constructor and Description
private	Snappy()

Method Summary

Modifier and Type	Method and Description
static byte[]	compress(byte[] data)
static int	compress(byte[] uncompressed, int uncompressedOffset, int uncompressedLength, byte[] compressed, int compressedOffset)
static java.io.InputStream	determineSnappyInputStream(java.io.InputStream source, boolean verifyChecksums) Uses the stream marker bytes to determine if the SnappyFramedInputStream or SnappyInputStream should be used to decompress the content of source.
static int	getUncompressedLength(byte[] compressed, int compressedOffset)
static int	maxCompressedLength(int sourceLength)
static byte[]	uncompress(byte[] compressed, int compressedOffset, int compressedSize)
static int	uncompress(byte[] compressed, int compressedOffset, int compressedSize, byte[] uncompressed, int uncompressedOffset)

Methods inherited from class java.lang.Object

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

Field Detail

MAX_HEADER_LENGTH

private static final int MAX_HEADER_LENGTH

LITERAL

static final int LITERAL

See Also:

Constant Field Values

COPY_1_BYTE_OFFSET

static final int COPY_1_BYTE_OFFSET

See Also:

Constant Field Values

COPY_2_BYTE_OFFSET

static final int COPY_2_BYTE_OFFSET

See Also:

Constant Field Values

COPY_4_BYTE_OFFSET

static final int COPY_4_BYTE_OFFSET

See Also:

Constant Field Values

Constructor Detail

Snappy

private Snappy()

Method Detail

determineSnappyInputStream

public static java.io.InputStream determineSnappyInputStream(java.io.InputStream source,
                                                             boolean verifyChecksums)
                                                      throws java.io.IOException

Uses the stream marker bytes to determine if the SnappyFramedInputStream or SnappyInputStream should be used to decompress the content of source.

Parameters:

source - The compressed content to decompress. Must support InputStream.mark(int).

verifyChecksums - Indicates if the crc32-c checksums should be calculated and verified.

Returns:

An appropriate InputStream implementation to decompress the content.

Throws:

java.lang.IllegalArgumentException - If source does not support mark/reset or does not contain the appropriate marker bytes for either implementation.

java.io.IOException

getUncompressedLength

public static int getUncompressedLength(byte[] compressed,
                                        int compressedOffset)
                                 throws CorruptionException

Throws:

CorruptionException

uncompress

public static byte[] uncompress(byte[] compressed,
                                int compressedOffset,
                                int compressedSize)
                         throws CorruptionException

Throws:

CorruptionException

uncompress

public static int uncompress(byte[] compressed,
                             int compressedOffset,
                             int compressedSize,
                             byte[] uncompressed,
                             int uncompressedOffset)
                      throws CorruptionException

Throws:

CorruptionException

maxCompressedLength

public static int maxCompressedLength(int sourceLength)

compress

public static int compress(byte[] uncompressed,
                           int uncompressedOffset,
                           int uncompressedLength,
                           byte[] compressed,
                           int compressedOffset)

compress

public static byte[] compress(byte[] data)