java.lang.Object
java.lang.Enum<SevenZMethod>
org.apache.commons.compress.archivers.sevenz.SevenZMethod
All Implemented Interfaces:
Serializable, Comparable<SevenZMethod>

public enum SevenZMethod extends 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.

  • Enum Constant Details

    • COPY

      public static final SevenZMethod COPY
      no compression at all
    • LZMA

      public static final SevenZMethod LZMA
      LZMA - only supported when reading
    • LZMA2

      public static final SevenZMethod LZMA2
      LZMA2
    • DEFLATE

      public static final SevenZMethod DEFLATE
      Deflate
    • DEFLATE64

      public static final SevenZMethod DEFLATE64
      Deflate64
      Since:
      1.16
    • BZIP2

      public static final SevenZMethod BZIP2
      BZIP2
    • 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
  • Field Details

    • id

      private final byte[] id
  • Constructor Details

    • SevenZMethod

      private SevenZMethod(byte[] id)
  • Method Details

    • values

      public static SevenZMethod[] values()
      Returns an array containing the constants of this enum type, in the order they are declared.
      Returns:
      an array containing the constants of this enum type, in the order they are declared
    • valueOf

      public static SevenZMethod valueOf(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:
      IllegalArgumentException - if this enum type has no constant with the specified name
      NullPointerException - if the argument is null
    • getId

      byte[] getId()
    • byId

      static SevenZMethod byId(byte[] id)