Module kala.compress.compressors.pack200

Package kala.compress.harmony.pack200

Class CodecEncoding

java.lang.Object

kala.compress.harmony.pack200.CodecEncoding

public class CodecEncoding
extends java.lang.Object

CodecEncoding is used to get the right Codec for a given meta-encoding.

Field Summary

Fields

Modifier and Type	Field	Description
private static BHSDCodec[]	canonicalCodec	The canonical encodings are defined to allow a single byte to represent one of the standard encodings.
private static java.util.Map<BHSDCodec,java.lang.Integer>	canonicalCodecsToSpecifiers
private static int[]	EMPTY_INT_ARRAY

Constructor Summary

Constructors

Constructor	Description
CodecEncoding()

Method Summary

Modifier and Type	Method	Description
static BHSDCodec	getCanonicalCodec(int i)
static Codec	getCodec(int value, java.io.InputStream in, Codec defaultCodec)	Gets the codec specified by the given value byte and optional byte header.
static int[]	getSpecifier(Codec codec, Codec defaultForBand)
static int	getSpecifierForDefaultCodec(BHSDCodec defaultCodec)

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_INT_ARRAY

private static final int[] EMPTY_INT_ARRAY

canonicalCodec

private static final BHSDCodec[] canonicalCodec

The canonical encodings are defined to allow a single byte to represent one of the standard encodings. The following values are defined in the Pack200 specification, and this array cannot be changed.

canonicalCodecsToSpecifiers

private static java.util.Map<BHSDCodec,java.lang.Integer> canonicalCodecsToSpecifiers

Constructor Detail

CodecEncoding

public CodecEncoding()

Method Detail

getCanonicalCodec

public static BHSDCodec getCanonicalCodec(int i)

getCodec

public static Codec getCodec(int value,
                             java.io.InputStream in,
                             Codec defaultCodec)
                      throws java.io.IOException,
                             Pack200Exception

Gets the codec specified by the given value byte and optional byte header. If the value is >= 116, then bytes may be consumed from the secondary input stream, which is taken to be the contents of the band_headers byte array. Since the values from this are consumed and not repeated, the input stream should be reused for subsequent encodings. This does not therefore close the input stream.

Parameters:

value - the canonical encoding value

in - the input stream to read additional byte headers from

defaultCodec - TODO

Returns:

the corresponding codec, or null if the default should be used

Throws:

java.io.IOException - if there is a problem reading from the input stream (which in reality, is never, since the band_headers are likely stored in a byte array and accessed via a ByteArrayInputStream. However, an EOFException could occur if things go wrong)

Pack200Exception - TODO

getSpecifier

public static int[] getSpecifier(Codec codec,
                                 Codec defaultForBand)

getSpecifierForDefaultCodec

public static int getSpecifierForDefaultCodec(BHSDCodec defaultCodec)