Package healpix.essentials

Class Compressor

java.lang.Object

healpix.essentials.Compressor

public class Compressor
extends Object

Class for compressing/uncompressing monotonous integer sequences. Implementation inspired by Moffat and Stuiver 2000: "Binary Interpolative Coding for Effective Index Compression", Information Retrieval 3, 25

Constructor Summary

Constructors

Constructor	Description
Compressor()

Method Summary

Modifier and Type	Method	Description
static long[]	interpol_decode(byte[] data)	Return an array containing the number sequence decompressed from data.
static byte[]	interpol_encode(long[] data, int begin, int end)	Return a byte array representing the compressed sequence [data[begin]; data[end-1]]

Methods inherited from class java.lang.Object

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

Constructor Detail

Compressor

public Compressor()

Method Detail

interpol_encode

public static byte[] interpol_encode(long[] data,
                                     int begin,
                                     int end)
                              throws Exception

Return a byte array representing the compressed sequence [data[begin]; data[end-1]]

Throws:

Exception

interpol_decode

public static long[] interpol_decode(byte[] data)
                              throws Exception

Return an array containing the number sequence decompressed from data.

Throws:

Exception