Class ZipLong

java.lang.Object

org.apache.commons.compress.archivers.zip.ZipLong

All Implemented Interfaces:

Serializable, Cloneable

public final class ZipLong
extends Object
implements Cloneable, Serializable

Utility class that represents a four byte integer with conversion rules for the little-endian byte order of ZIP files.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final ZipLong	AED_SIG	Archive extra data record signature.
static final ZipLong	CFH_SIG	Central File Header Signature
static final ZipLong	DD_SIG	Data Descriptor signature.
static final ZipLong	LFH_SIG	Local File Header Signature
static final ZipLong	SINGLE_SEGMENT_SPLIT_MARKER	Marks ZIP archives that were supposed to be split or spanned but only needed a single segment in then end (so are actually neither split nor spanned).

Constructor Summary

Constructors

Constructor	Description
ZipLong(byte[] bytes)	Constructs a new instance from bytes.
ZipLong(byte[] bytes, int offset)	Creates instance from the four bytes starting at offset.
ZipLong(int value)	create instance from a Java int.
ZipLong(long value)	Creates instance from a number.

Method Summary

Modifier and Type	Method	Description
Object	clone()
boolean	equals(Object o)	Override to make two instances with same value equal.
byte[]	getBytes()	Gets value as four bytes in big-endian byte order.
static byte[]	getBytes(long value)	Gets value as four bytes in big-endian byte order.
int	getIntValue()	Gets value as a (signed) Java int
long	getValue()	Gets value as Java long.
static long	getValue(byte[] bytes)	Helper method to get the value as a Java long from a four-byte array
static long	getValue(byte[] bytes, int offset)	Helper method to get the value as a Java long from four bytes starting at given array offset
int	hashCode()	Override to make two instances with same value equal.
void	putLong(byte[] buf, int offset)
static void	putLong(long value, byte[] buf, int offset)	put the value as four bytes in big-endian byte order.
String	toString()

Methods inherited from class Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

CFH_SIG

public static final ZipLong CFH_SIG

Central File Header Signature

LFH_SIG

public static final ZipLong LFH_SIG

Local File Header Signature

DD_SIG

public static final ZipLong DD_SIG

Data Descriptor signature.

Actually, PKWARE uses this as marker for split/spanned archives and other archivers have started to use it as Data Descriptor signature (as well).

Since:

1.1

SINGLE_SEGMENT_SPLIT_MARKER

public static final ZipLong SINGLE_SEGMENT_SPLIT_MARKER

Marks ZIP archives that were supposed to be split or spanned but only needed a single segment in then end (so are actually neither split nor spanned).

This is the "PK00" prefix found in some archives.

Since:

1.5

AED_SIG

public static final ZipLong AED_SIG

Archive extra data record signature.

Since:

1.5

Constructor Details

ZipLong

public ZipLong(byte[] bytes)

Constructs a new instance from bytes.

Parameters:

bytes - the bytes to store as a ZipLong

ZipLong

public ZipLong(byte[] bytes,
 int offset)

Creates instance from the four bytes starting at offset.

Parameters:

bytes - the bytes to store as a ZipLong

offset - the offset to start

ZipLong

public ZipLong(int value)

create instance from a Java int.

Parameters:

value - the int to store as a ZipLong

Since:

1.15

ZipLong

public ZipLong(long value)

Creates instance from a number.

Parameters:

value - the long to store as a ZipLong

Method Details

getBytes

public static byte[] getBytes(long value)

Gets value as four bytes in big-endian byte order.

Parameters:

value - the value to convert

Returns:

value as four bytes in big-endian byte order

getValue

public static long getValue(byte[] bytes)

Helper method to get the value as a Java long from a four-byte array

Parameters:

bytes - the array of bytes

Returns:

the corresponding Java long value

getValue

public static long getValue(byte[] bytes,
 int offset)

Helper method to get the value as a Java long from four bytes starting at given array offset

Parameters:

bytes - the array of bytes

offset - the offset to start

Returns:

the corresponding Java long value

putLong

public static void putLong(long value,
 byte[] buf,
 int offset)

put the value as four bytes in big-endian byte order.

Parameters:

value - the Java long to convert to bytes

buf - the output buffer

offset - The offset within the output buffer of the first byte to be written. must be non-negative and no larger than buf.length-4

clone

public Object clone()

Overrides:

clone in class Object

equals

public boolean equals(Object o)

Override to make two instances with same value equal.

Overrides:

equals in class Object

Parameters:

o - an object to compare

Returns:

true if the objects are equal

getBytes

public byte[] getBytes()

Gets value as four bytes in big-endian byte order.

Returns:

value as four bytes in big-endian order

getIntValue

public int getIntValue()

Gets value as a (signed) Java int

Returns:

value as int

Since:

1.15

getValue

public long getValue()

Gets value as Java long.

Returns:

value as a long

hashCode

public int hashCode()

Override to make two instances with same value equal.

Overrides:

hashCode in class Object

Returns:

the value stored in the ZipLong

putLong

public void putLong(byte[] buf,
 int offset)

toString

public String toString()

Overrides:

toString in class Object