com.frostwire.jlibtorrent

Class Sha1Hash

java.lang.Object

com.frostwire.jlibtorrent.Sha1Hash

All Implemented Interfaces:

java.lang.Cloneable, java.lang.Comparable<Sha1Hash>

public final class Sha1Hash
extends java.lang.Object
implements java.lang.Comparable<Sha1Hash>, java.lang.Cloneable

This type holds a SHA-1 digest or any other kind of 20 byte sequence. It implements a number of convenience functions, such as bit operations, comparison operators etc.

In libtorrent it is primarily used to hold info-hashes, piece-hashes, peer IDs, node IDs etc.

Constructor Summary

Constructors

Constructor and Description
Sha1Hash() Constructs an all-zero sha1-hash
Sha1Hash(byte[] bytes)
Sha1Hash(sha1_hash h)
Sha1Hash(java.lang.String hex)

Method Summary

Modifier and Type	Method and Description
void	clear() set the sha1-hash to all zeroes.
Sha1Hash	clone()
int	compareTo(Sha1Hash o)
int	countLeadingZeroes()
boolean	equals(java.lang.Object obj)
int	hashCode()
boolean	isAllZeros() return true if the sha1-hash is all zero.
static Sha1Hash	max() returns an all-F sha1-hash.
static Sha1Hash	min() returns an all-zero sha1-hash.
sha1_hash	swig()
java.lang.String	toHex() Returns the hex representation of this has.
java.lang.String	toString() Returns an hex representation of this hash.

Methods inherited from class java.lang.Object

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

Constructor Detail

Sha1Hash

public Sha1Hash(sha1_hash h)

Parameters:

h - native object

Sha1Hash

public Sha1Hash(byte[] bytes)

Parameters:

bytes - hash as an array of bytes

Sha1Hash

public Sha1Hash(java.lang.String hex)

Parameters:

hex - hex coded representation of the hash

Sha1Hash

public Sha1Hash()

Constructs an all-zero sha1-hash

Method Detail

swig

public sha1_hash swig()

Returns:

the native object

clear

public void clear()

set the sha1-hash to all zeroes.

isAllZeros

public boolean isAllZeros()

return true if the sha1-hash is all zero.

Returns:

true if zero

countLeadingZeroes

public int countLeadingZeroes()

Returns:

the number of leading zeroes

toHex

public java.lang.String toHex()

Returns the hex representation of this has.

This method uses internally the libtorrent to_hex function.

Returns:

the hex representation

compareTo

public int compareTo(Sha1Hash o)

Specified by:

compareTo in interface java.lang.Comparable<Sha1Hash>

Parameters:

o -

Returns:

toString

public java.lang.String toString()

Returns an hex representation of this hash. Internally it calls toHex().

Overrides:

toString in class java.lang.Object

Returns:

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

Parameters:

obj -

Returns:

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

Returns:

clone

public Sha1Hash clone()

Overrides:

clone in class java.lang.Object

max

public static Sha1Hash max()

returns an all-F sha1-hash. i.e. the maximum value representable by a 160 bit number (20 bytes). This is a static member function.

Returns:

the maximum number

min

public static Sha1Hash min()

returns an all-zero sha1-hash. i.e. the minimum value representable by a 160 bit number (20 bytes). This is a static member function.

Returns:

the minimum number (zero)