Enum SevenZMethod
- All Implemented Interfaces:
Serializable
,Comparable<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 Summary
Enum ConstantsEnum ConstantDescriptionAES encryption with a key length of 256 bit using SHA256 for hashes - only supported when readingBCJ ARM platform.BCJ ARM Thumb platform.BCJ I64 platform.BCJ PowerPC platform.BCJ Sparc platform.BCJ x86 platform version 1.BZIP2no compression at allDeflateDeflate64Delta filter.LZMA - only supported when readingLZMA2 -
Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescription(package private) static SevenZMethod
byId
(byte[] id) (package private) byte[]
getId()
static SevenZMethod
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.
-
Enum Constant Details
-
COPY
no compression at all -
LZMA
LZMA - only supported when reading -
LZMA2
LZMA2 -
DEFLATE
Deflate -
DEFLATE64
Deflate64- Since:
- 1.16
-
BZIP2
BZIP2 -
AES256SHA256
AES encryption with a key length of 256 bit using SHA256 for hashes - only supported when reading -
BCJ_X86_FILTER
BCJ x86 platform version 1.- Since:
- 1.8
-
BCJ_PPC_FILTER
BCJ PowerPC platform.- Since:
- 1.8
-
BCJ_IA64_FILTER
BCJ I64 platform.- Since:
- 1.8
-
BCJ_ARM_FILTER
BCJ ARM platform.- Since:
- 1.8
-
BCJ_ARM_THUMB_FILTER
BCJ ARM Thumb platform.- Since:
- 1.8
-
BCJ_SPARC_FILTER
BCJ Sparc platform.- Since:
- 1.8
-
DELTA_FILTER
Delta filter.- Since:
- 1.8
-
-
Field Details
-
id
private final byte[] id
-
-
Constructor Details
-
SevenZMethod
private SevenZMethod(byte[] id)
-
-
Method Details
-
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
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 nameNullPointerException
- if the argument is null
-
getId
byte[] getId() -
byId
-