org.openimaj.util.hash.composition

Class HashComposition<OBJECT>

java.lang.Object

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

Type Parameters:

OBJECT - Type of object being hashed

All Implemented Interfaces:

HashFunction<OBJECT>

Direct Known Subclasses:

PolyHashComposition, RandomProjectionHashComposition, SimpleComposition

public abstract class HashComposition<OBJECT>
extends Object
implements HashFunction<OBJECT>

HashCompositions are HashFunctions that compose the hash codes generated by multiple hash functions applied to an object into a single hash code for that object.

Author:

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

Field Summary

Fields

Modifier and Type	Field and Description
protected List<HashFunction<OBJECT>>	hashFunctions

Constructor Summary

Constructors

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

Method Summary

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.openimaj.util.hash.HashFunction

computeHashCode

Field Detail

hashFunctions

protected List<HashFunction<OBJECT>> hashFunctions

Constructor Detail

HashComposition

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

Construct with the given functions.

Parameters:

functions - the underlying hash functions.

HashComposition

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

Construct with the given functions.

Parameters:

first - the first function

remainder - the remainder of the functions

HashComposition

public HashComposition(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