Package com.illumon.iris.db.tables.utils

Class CompressedFileUtils

java.lang.Object

com.illumon.iris.db.tables.utils.CompressedFileUtils

public class CompressedFileUtils
extends Object

Util File that handles .zst file compressions in addition to compression formats supported by CompressedFileUtil

Constructor Summary

Constructors

Constructor	Description
CompressedFileUtils()

Method Summary

Modifier and Type	Method	Description
static boolean	isZeeStandardCompressedFile(String sFileName)	Method reads the first 4 bytes of the passed in file and returns true if they match Zstandard compression formats magic number
static InputStream	openPossiblyCompressedFile(String sFileName)	Takes in the full path of a file and returns an instance of InputStream after checking and decompressing the file if it is one of ".gz", ".tgz", ".tar.gz", ".zip", ".bz2", ".7z", ".zst" compression formats, otherwise returns an instance of InputStream as is.
static InputStream	openZeeStandardCompressedFile(String sFileName)	The given Zstandard compressed file, is opened using ZstdCompressorInputStream and returned as an InputStream

Methods inherited from class java.lang.Object

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

Constructor Details

CompressedFileUtils

public CompressedFileUtils()

Method Details

openPossiblyCompressedFile

public static InputStream openPossiblyCompressedFile(String sFileName)
                                              throws IOException

Takes in the full path of a file and returns an instance of InputStream after checking and decompressing the file if it is one of ".gz", ".tgz", ".tar.gz", ".zip", ".bz2", ".7z", ".zst" compression formats, otherwise returns an instance of InputStream as is.

Parameters:

sFileName - full path including the filename of the possible compression file

Returns:

The InputStream of the given file after decompressing if necessary.

Throws:

IOException - if an IOException occurs when handling the given file

isZeeStandardCompressedFile

public static boolean isZeeStandardCompressedFile(String sFileName)
                                           throws IOException

Method reads the first 4 bytes of the passed in file and returns true if they match Zstandard compression formats magic number

Parameters:

sFileName - full path including the filename of the possible compression file

Returns:

true if given path represents a file compressed using the Zstandard compression format

Throws:

IOException - if an IOException occurs when verifying the given file

openZeeStandardCompressedFile

public static InputStream openZeeStandardCompressedFile(String sFileName)
                                                 throws IOException

The given Zstandard compressed file, is opened using ZstdCompressorInputStream and returned as an InputStream

Parameters:

sFileName - full path including the filename of the Zstandard compressed file

Returns:

InputStream after decompressing using ZstdCompressorInputStream on the given file

Throws:

IOException - if an IOException occurs when opening the given file