Package org.apache.nutch.util

Class GZIPUtils

java.lang.Object
org.apache.nutch.util.GZIPUtils
public class GZIPUtils extends Object
A collection of utility methods for working on GZIPed data.

  • Constructor Summary

    Constructors
    Constructor
    Description
    GZIPUtils()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static final byte[]
    unzip(byte[] in)
    Returns an gunzipped copy of the input array.
    static final byte[]
    unzipBestEffort(byte[] in)
    Returns an gunzipped copy of the input array.
    static final byte[]
    unzipBestEffort(byte[] in, int sizeLimit)
    Returns an gunzipped copy of the input array, truncated to sizeLimit bytes, if necessary.
    static final 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

  • Constructor Details

    • GZIPUtils

      public GZIPUtils()

  • Method Details

    • unzipBestEffort

      public static final 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 - byte array to gunzipped
      Returns:
      the gunzipped byte array, or null

    • unzipBestEffort

      public static final 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 - Byte array to gunzip
      sizeLimit - Maximum size allowed for gunzipped byte array
      Returns:
      the gunzipped byte array, or null

    • unzip

      public static final byte[] unzip(byte[] in) throws IOException
      Returns an gunzipped copy of the input array.
      Parameters:
      in - Byte array to gunzip
      Returns:
      the gunzipped byte array
      Throws:
      IOException - if the input cannot be properly decompressed

    • zip

      public static final byte[] zip(byte[] in)
      Returns an gzipped copy of the input array.
      Parameters:
      in - Byte array to zip
      Returns:
      the zipped byte array