Package org.apache.commons.compress.archivers.zip

Enum ZipMethod

java.lang.Object

java.lang.Enum<ZipMethod>

org.apache.commons.compress.archivers.zip.ZipMethod

All Implemented Interfaces:

Serializable, Comparable<ZipMethod>

public enum ZipMethod
extends Enum<ZipMethod>

Enumerates known compression methods. Some of these methods are currently not supported by commons compress.

Since:

1.5

Enum Constant Summary

Enum Constants

Enum Constant	Description
AES_ENCRYPTED	Compression Method 99 for AES encryption.
BZIP2	Compression Method 12 for bzip2.
DEFLATED	Compression method 8 for compressed (deflated) entries.
ENHANCED_DEFLATED	Compression Method 9 for enhanced deflate.
EXPANDING_LEVEL_1	Reduced with compression factor 1.
EXPANDING_LEVEL_2	Reduced with compression factor 2.
EXPANDING_LEVEL_3	Reduced with compression factor 3.
EXPANDING_LEVEL_4	Reduced with compression factor 4.
IMPLODING	Imploding.
JPEG	Compression Method 96 for Jpeg compression.
LZMA	Compression Method 14 for LZMA.
PKWARE_IMPLODING	PKWARE Data Compression Library Imploding.
PPMD	Compression Method 98 for PPMd.
STORED	Compression method 0 for uncompressed entries.
TOKENIZATION	Tokenization.
UNKNOWN	Unknown compression method.
UNSHRINKING	UnShrinking. dynamic Lempel-Ziv-Welch-Algorithm
WAVPACK	Compression Method 97 for WavPack.
XZ	Compression Method 95 for XZ.
ZSTD	Compression Method 93 for Zstandard.
ZSTD_DEPRECATED	Compression Method 20 for Zstandard (deprecated).

Method Summary

Modifier and Type	Method	Description
int	getCode()	Gets the code of the compression method.
static ZipMethod	getMethodByCode(int code)	Gets the ZipMethod for the given code or null if the method is not known.
static ZipMethod	valueOf(String name)	Returns the enum constant of this type with the specified name.
static ZipMethod[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

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

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

STORED

public static final ZipMethod STORED

Compression method 0 for uncompressed entries.

See Also:

• ZipEntry.STORED

UNSHRINKING

public static final ZipMethod UNSHRINKING

UnShrinking. dynamic Lempel-Ziv-Welch-Algorithm

See Also:

• Explanation of fields: compression method: (2 bytes)

EXPANDING_LEVEL_1

public static final ZipMethod EXPANDING_LEVEL_1

Reduced with compression factor 1.

See Also:

• Explanation of fields: compression method: (2 bytes)

EXPANDING_LEVEL_2

public static final ZipMethod EXPANDING_LEVEL_2

Reduced with compression factor 2.

See Also:

• Explanation of fields: compression method: (2 bytes)

EXPANDING_LEVEL_3

public static final ZipMethod EXPANDING_LEVEL_3

Reduced with compression factor 3.

See Also:

• Explanation of fields: compression method: (2 bytes)

EXPANDING_LEVEL_4

public static final ZipMethod EXPANDING_LEVEL_4

Reduced with compression factor 4.

See Also:

• Explanation of fields: compression method: (2 bytes)

IMPLODING

public static final ZipMethod IMPLODING

Imploding.

See Also:

• Explanation of fields: compression method: (2 bytes)

TOKENIZATION

public static final ZipMethod TOKENIZATION

Tokenization.

See Also:

• Explanation of fields: compression method: (2 bytes)

DEFLATED

public static final ZipMethod DEFLATED

Compression method 8 for compressed (deflated) entries.

See Also:

• ZipEntry.DEFLATED

ENHANCED_DEFLATED

public static final ZipMethod ENHANCED_DEFLATED

Compression Method 9 for enhanced deflate.

See Also:

• Explanation of fields: compression method: (2 bytes)

PKWARE_IMPLODING

public static final ZipMethod PKWARE_IMPLODING

PKWARE Data Compression Library Imploding.

See Also:

• Explanation of fields: compression method: (2 bytes)

BZIP2

public static final ZipMethod BZIP2

Compression Method 12 for bzip2.

See Also:

• Explanation of fields: compression method: (2 bytes)

LZMA

public static final ZipMethod LZMA

Compression Method 14 for LZMA.

See Also:

• https://www.7-zip.org/sdk.html
• Explanation of fields: compression method: (2 bytes)

ZSTD_DEPRECATED

public static final ZipMethod ZSTD_DEPRECATED

Compression Method 20 for Zstandard (deprecated).

Since:

1.28.0

See Also:

• Facebook Zstandard source code
• .ZIP File Format Specification 6.3.7: Deprecated zstd compression method id
• .ZIP File Format Specification: Explanation of fields: compression method: (2 bytes)

ZSTD

public static final ZipMethod ZSTD

Compression Method 93 for Zstandard.

Since:

1.28.0

See Also:

• Facebook Zstandard source code
• .ZIP File Format Specification 6.3.8: Changed zstd compression method id
• .ZIP File Format Specification: Explanation of fields: compression method: (2 bytes)

XZ

public static final ZipMethod XZ

Compression Method 95 for XZ.

See Also:

• Explanation of fields: compression method: (2 bytes)

JPEG

public static final ZipMethod JPEG

Compression Method 96 for Jpeg compression.

See Also:

• Explanation of fields: compression method: (2 bytes)

WAVPACK

public static final ZipMethod WAVPACK

Compression Method 97 for WavPack.

See Also:

• Explanation of fields: compression method: (2 bytes)

PPMD

public static final ZipMethod PPMD

Compression Method 98 for PPMd.

See Also:

• Explanation of fields: compression method: (2 bytes)

AES_ENCRYPTED

public static final ZipMethod AES_ENCRYPTED

Compression Method 99 for AES encryption.

See Also:

• Explanation of fields: compression method: (2 bytes)

UNKNOWN

public static final ZipMethod UNKNOWN

Unknown compression method.

Method Details

values

public static ZipMethod[] 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 ZipMethod 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

getMethodByCode

public static ZipMethod getMethodByCode(int code)

Gets the ZipMethod for the given code or null if the method is not known.

Parameters:

code - the code

Returns:

the ZipMethod for the given code or null if the method is not known.

getCode

public int getCode()

Gets the code of the compression method.

Returns:

an integer code for the method

See Also:

• ZipArchiveEntry.getMethod()