org.eclipse.smila.connectivity.framework.crawler.web.util
Class GZIPUtils

java.lang.Object
  org.eclipse.smila.connectivity.framework.crawler.web.util.GZIPUtils

public final class GZIPUtils
extends java.lang.Object

A collection of utility methods for working on GZIPed data.

Method Summary

static byte[]	unzip(byte[] in) Returns an gunzipped copy of the input array.
static byte[]	unzipBestEffort(byte[] in) Returns an gunzipped copy of the input array.
static byte[]	unzipBestEffort(byte[] in, int sizeLimit) Returns an gunzipped copy of the input array, truncated to sizeLimit bytes, if necessary.
static byte[]	zip(byte[] in) Returns an gzipped copy of the input array.

Methods inherited from class java.lang.Object

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

Method Detail

unzipBestEffort

public static byte[] unzipBestEffort(byte[] in)

Returns an gunzipped copy of the input array. If the gzipped input has been truncated or corrupted, a best-effort attempt is made to unzip as much as possible. If no data can be extracted null is returned.

Parameters:

in - input byte array

Returns:

byte array

unzipBestEffort

public static byte[] unzipBestEffort(byte[] in,
                                     int sizeLimit)

Returns an gunzipped copy of the input array, truncated to sizeLimit bytes, if necessary. If the gzipped input has been truncated or corrupted, a best-effort attempt is made to unzip as much as possible. If no data can be extracted null is returned.

Parameters:

in - input byte array

sizeLimit - value in bytes to truncate gunzziped copy of the input array

Returns:

gunzipped byte array

unzip

public static byte[] unzip(byte[] in)
                    throws java.io.IOException

Returns an gunzipped copy of the input array.

Parameters:

in - input byte array

Returns:

gunzipped copy of the input array

Throws:

java.io.IOException - if the input cannot be properly decompressed

zip

public static byte[] zip(byte[] in)

Returns an gzipped copy of the input array.

Parameters:

in - input byte array

Returns:

byte gzipped copy of the input array