org.openimaj.util.hash.composition

Class SimpleComposition<OBJECT>

java.lang.Object

org.openimaj.util.hash.composition.HashComposition<OBJECT>

org.openimaj.util.hash.composition.SimpleComposition<OBJECT>

Type Parameters:

OBJECT - Type of object being hashed

All Implemented Interfaces:

HashFunction<OBJECT>

public class SimpleComposition<OBJECT>
extends HashComposition<OBJECT>

Simple composition function. Computes the composite hash using the same method as HashCodeUtil for int arrays.

Author:

Jonathon Hare (jsh2@ecs.soton.ac.uk)

Field Summary

Fields inherited from class org.openimaj.util.hash.composition.HashComposition

hashFunctions

Constructor Summary

Constructors

Constructor and Description
SimpleComposition(HashFunction<OBJECT> first, HashFunction<OBJECT>... remainder) Construct with the given functions.
SimpleComposition(HashFunctionFactory<OBJECT> factory, int nFuncs) Construct with the factory which is used to produce the required number of functions.
SimpleComposition(List<HashFunction<OBJECT>> functions) Construct with the given functions.

Method Summary

Modifier and Type	Method and Description
int	computeHashCode(OBJECT object) Compute the hash code for the object

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleComposition

public SimpleComposition(List<HashFunction<OBJECT>> functions)

Construct with the given functions.

Parameters:

functions - the underlying hash functions.

SimpleComposition

@SafeVarargs
public SimpleComposition(HashFunction<OBJECT> first,
                                      HashFunction<OBJECT>... remainder)

Construct with the given functions.

Parameters:

first - the first function

remainder - the remainder of the functions

SimpleComposition

public SimpleComposition(HashFunctionFactory<OBJECT> factory,
                         int nFuncs)

Construct with the factory which is used to produce the required number of functions.

Parameters:

factory - the factory to use to produce the underlying hash functions.

nFuncs - the number of functions to create for the composition

Method Detail

computeHashCode

public int computeHashCode(OBJECT object)

Description copied from interface: HashFunction

Compute the hash code for the object

Parameters:

object - the object

Returns:

the hash code