Package org.brotli.integration

Class BundleHelper

  • public class BundleHelper
extends java.lang.Object
    Utilities to work test files bundles in zip archive.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private static long CRC_64_POLY
      ECMA CRC64 polynomial.

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      private BundleHelper()  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static long fingerprintStream​(java.io.InputStream input)
      Calculates CRC64 of stream contents.
      static long getExpectedFingerprint​(java.lang.String entryName)  
      static java.util.List<java.lang.String> listEntries​(java.io.InputStream input)  
      static byte[] readEntry​(java.io.InputStream input, java.lang.String entryName)  
      static byte[] readStream​(java.io.InputStream input)  
      static long updateCrc64​(long crc, byte[] data, int offset, int length)
      Rolls CRC64 calculation.

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • CRC_64_POLY

        private static final long CRC_64_POLY
        ECMA CRC64 polynomial.

    • Constructor Detail

      • BundleHelper

        private BundleHelper()

    • Method Detail

      • listEntries

        public static java.util.List<java.lang.String> listEntries​(java.io.InputStream input)
                                                    throws java.io.IOException
        Throws:
        java.io.IOException

      • readStream

        public static byte[] readStream​(java.io.InputStream input)
                         throws java.io.IOException
        Throws:
        java.io.IOException

      • readEntry

        public static byte[] readEntry​(java.io.InputStream input,
                               java.lang.String entryName)
                        throws java.io.IOException
        Throws:
        java.io.IOException

      • updateCrc64

        public static long updateCrc64​(long crc,
                               byte[] data,
                               int offset,
                               int length)
        Rolls CRC64 calculation.

        CRC64(data) = -1 ^ updateCrc64((... updateCrc64(-1, firstBlock), ...), lastBlock);

        This simple and reliable checksum is chosen to make is easy to calculate the same value across the variety of languages (C++, Java, Go, ...).

      • fingerprintStream

        public static long fingerprintStream​(java.io.InputStream input)
                              throws java.io.IOException
        Calculates CRC64 of stream contents.
        Throws:
        java.io.IOException

      • getExpectedFingerprint

        public static long getExpectedFingerprint​(java.lang.String entryName)