healpix.essentials

Class Compressor

java.lang.Object

healpix.essentials.Compressor

public class Compressor
extends java.lang.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

Author:

Martin Reinecke

Copyright:

2014 Max-Planck-Society

Constructor Summary

Constructors

Constructor and Description
Compressor()

Method Summary

Modifier and Type	Method and 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 java.lang.Exception

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

Throws:

java.lang.Exception

interpol_decode

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

Return an array containing the number sequence decompressed from data.

Throws:

java.lang.Exception