com.j256.simplezip.format

Class ZipDataDescriptor

java.lang.Object

com.j256.simplezip.format.ZipDataDescriptor

public class ZipDataDescriptor
extends Object

Optional data descriptor immediately after the file-data. Only written if GeneralPurposeFlag.DATA_DESCRIPTOR is set in the ZipFileHeader. This can be encoded as 32-bit or 64-bit sizes depending on whether or not the sizes overflow the 4-byte integer.

Author:

graywatson

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ZipDataDescriptor.Builder Builder for ZipDataDescriptor.

Field Summary

Fields

Modifier and Type	Field and Description
static int	OPTIONAL_EXPECTED_SIGNATURE optional signature at the start of the data-descriptor

Constructor Summary

Constructors

Constructor and Description
ZipDataDescriptor(boolean zip64, long crc32, long compressedSize, long uncompressedSize)

Method Summary

Modifier and Type	Method and Description
static ZipDataDescriptor.Builder	builder() Make a builder for this class.
long	getCompressedSize()
long	getCrc32()
long	getUncompressedSize()
boolean	isZip64()
static ZipDataDescriptor	read(RewindableInputStream inputStream, long compressedSize, long uncompressedSize) Read from the input-stream.
void	write(OutputStream outputStream) Write to the output-stream.

Methods inherited from class java.lang.Object

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

Field Detail

OPTIONAL_EXPECTED_SIGNATURE

public static final int OPTIONAL_EXPECTED_SIGNATURE

optional signature at the start of the data-descriptor

See Also:

Constant Field Values

Constructor Detail

ZipDataDescriptor

public ZipDataDescriptor(boolean zip64,
                         long crc32,
                         long compressedSize,
                         long uncompressedSize)

Method Detail

builder

public static ZipDataDescriptor.Builder builder()

Make a builder for this class.

read

public static ZipDataDescriptor read(RewindableInputStream inputStream,
                                     long compressedSize,
                                     long uncompressedSize)
                              throws IOException

Read from the input-stream.

Parameters:

compressedSize - Size of the compressed data which is uses to see if we need to read in a zip64 or zip32 descriptor.

uncompressedSize - Size of the uncompressed data which is uses to see if we need to read in a zip64 or zip32 descriptor.

Throws:

IOException

write

public void write(OutputStream outputStream)
           throws IOException

Write to the output-stream.

Throws:

IOException

isZip64

public boolean isZip64()

getCrc32

public long getCrc32()

getCompressedSize

public long getCompressedSize()

getUncompressedSize

public long getUncompressedSize()