Package com.scurrilous.circe.impl

Class IntStatelessLongHash

java.lang.Object

com.scurrilous.circe.impl.IntStatelessLongHash

All Implemented Interfaces:

Hash, StatelessHash, StatelessLongHash

public final class IntStatelessLongHash
extends Object
implements StatelessLongHash

Promotes a StatelessIntHash to a StatelessLongHash.

Constructor Summary

Constructors

Constructor	Description
IntStatelessLongHash(StatelessIntHash intHash)	Constructs a new IntStatelessLongHash that delegates to the given StatelessIntHash.

Method Summary

Modifier and Type	Method	Description
String	algorithm()	Returns the canonical name of this hash algorithm.
long	calculate(byte[] input)	Evaluates this hash function for the entire given input array.
long	calculate(byte[] input, int index, int length)	Evaluates this hash function for the given range of the given input array.
long	calculate(long address, long length)	Evaluates this hash function for the memory with the given address and length.
long	calculate(ByteBuffer input)	Evaluates this hash function with the remaining contents of the given input buffer.
StatefulLongHash	createStateful()	Returns a new instance of stateful version of this hash function.
int	length()	Returns the length in bytes of the output of this hash function.
boolean	supportsUnsafe()	Returns whether this hash function supports unsafe access to arbitrary memory addresses using methods such as StatefulHash.update(long, long), StatelessIntHash.calculate(long, long), or IncrementalIntHash.resume(int, long, long).

Methods inherited from class java.lang.Object

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

Constructor Details

IntStatelessLongHash

public IntStatelessLongHash(StatelessIntHash intHash)

Constructs a new IntStatelessLongHash that delegates to the given StatelessIntHash.

Parameters:

intHash - the underlying int-width hash

Method Details

algorithm

public String algorithm()

Description copied from interface: Hash

Returns the canonical name of this hash algorithm.

Specified by:

algorithm in interface Hash

Returns:

the name of this hash algorithm

length

public int length()

Description copied from interface: Hash

Returns the length in bytes of the output of this hash function.

Specified by:

length in interface Hash

Returns:

the hash length in bytes

supportsUnsafe

public boolean supportsUnsafe()

Description copied from interface: Hash

Returns whether this hash function supports unsafe access to arbitrary memory addresses using methods such as StatefulHash.update(long, long), StatelessIntHash.calculate(long, long), or IncrementalIntHash.resume(int, long, long). Such functions are generally implemented in native code.

Specified by:

supportsUnsafe in interface Hash

Returns:

true if unsafe access is supported, false if not

createStateful

public StatefulLongHash createStateful()

Description copied from interface: StatelessLongHash

Returns a new instance of stateful version of this hash function.

Specified by:

createStateful in interface StatelessHash

Specified by:

createStateful in interface StatelessLongHash

Returns:

the stateful version of this hash function

calculate

public long calculate(byte[] input)

Description copied from interface: StatelessLongHash

Evaluates this hash function for the entire given input array.

Specified by:

calculate in interface StatelessLongHash

Parameters:

input - the input array

Returns:

the output of the hash function

calculate

public long calculate(byte[] input,
 int index,
 int length)

Description copied from interface: StatelessLongHash

Evaluates this hash function for the given range of the given input array.

Specified by:

calculate in interface StatelessLongHash

Parameters:

input - the input array

index - the starting index of the first input byte

length - the length of the input range

Returns:

the output of the hash function

calculate

public long calculate(ByteBuffer input)

Description copied from interface: StatelessLongHash

Evaluates this hash function with the remaining contents of the given input buffer. This method leaves the buffer position at the limit.

Specified by:

calculate in interface StatelessLongHash

Parameters:

input - the input buffer

Returns:

the output of the hash function

calculate

public long calculate(long address,
 long length)

Description copied from interface: StatelessLongHash

Evaluates this hash function for the memory with the given address and length. The arguments are generally not checked in any way and will likely lead to a VM crash or undefined results if invalid.

Specified by:

calculate in interface StatelessLongHash

Parameters:

address - the base address of the input

length - the length of the input

Returns:

the output of the hash function

See Also:

• Hash.supportsUnsafe()