Package org.apache.commons.compress.archivers.sevenz

Enum SevenZMethod

  • All Implemented Interfaces:
    java.io.Serializable, java.lang.Comparable<SevenZMethod>
    public enum SevenZMethod
extends java.lang.Enum<SevenZMethod>
    The (partially) supported compression/encryption methods used in 7z archives.

    All methods with a _FILTER suffix are used as preprocessors with the goal of creating a better compression ratio with the compressor that comes next in the chain of methods. 7z will in general only allow them to be used together with a "real" compression method but Commons Compress doesn't enforce this.

    The BCJ_ filters work on executable files for the given platform and convert relative addresses to absolute addresses in CALL instructions. This means they are only useful when applied to executables of the chosen platform.

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static SevenZMethod valueOf​(java.lang.String name)
      Returns the enum constant of this type with the specified name.
      static SevenZMethod[] values()
      Returns an array containing the constants of this enum type, in the order they are declared.

      • Methods inherited from class java.lang.Enum

        compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

      • Methods inherited from class java.lang.Object

        getClass, notify, notifyAll, wait, wait, wait

    • Enum Constant Detail

      • COPY

        public static final SevenZMethod COPY
        no compression at all

      • LZMA

        public static final SevenZMethod LZMA
        LZMA - only supported when reading

      • DEFLATE64

        public static final SevenZMethod DEFLATE64
        Deflate64
        Since:
        1.16

      • AES256SHA256

        public static final SevenZMethod AES256SHA256
        AES encryption with a key length of 256 bit using SHA256 for hashes - only supported when reading

      • BCJ_X86_FILTER

        public static final SevenZMethod BCJ_X86_FILTER
        BCJ x86 platform version 1.
        Since:
        1.8

      • BCJ_PPC_FILTER

        public static final SevenZMethod BCJ_PPC_FILTER
        BCJ PowerPC platform.
        Since:
        1.8

      • BCJ_IA64_FILTER

        public static final SevenZMethod BCJ_IA64_FILTER
        BCJ I64 platform.
        Since:
        1.8

      • BCJ_ARM_FILTER

        public static final SevenZMethod BCJ_ARM_FILTER
        BCJ ARM platform.
        Since:
        1.8

      • BCJ_ARM_THUMB_FILTER

        public static final SevenZMethod BCJ_ARM_THUMB_FILTER
        BCJ ARM Thumb platform.
        Since:
        1.8

      • BCJ_SPARC_FILTER

        public static final SevenZMethod BCJ_SPARC_FILTER
        BCJ Sparc platform.
        Since:
        1.8

      • DELTA_FILTER

        public static final SevenZMethod DELTA_FILTER
        Delta filter.
        Since:
        1.8

    • Method Detail

      • values

        public static SevenZMethod[] values()
        Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows: 
        for (SevenZMethod c : SevenZMethod.values())
    System.out.println(c);
        Returns:
        an array containing the constants of this enum type, in the order they are declared

      • valueOf

        public static SevenZMethod valueOf​(java.lang.String name)
        Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
        Parameters:
        name - the name of the enum constant to be returned.
        Returns:
        the enum constant with the specified name
        Throws:
        java.lang.IllegalArgumentException - if this enum type has no constant with the specified name
        java.lang.NullPointerException - if the argument is null