Package org.hibernate.search.util.common.data.impl

Class SimpleHashFunction

java.lang.Object

org.hibernate.search.util.common.data.impl.SimpleHashFunction

All Implemented Interfaces:

HashFunction

public final class SimpleHashFunction
extends Object
implements HashFunction

A fast, but cryptographically insecure hash function, based on Java's String.toString().

Field Summary

Fields

Modifier and Type	Field	Description
static final SimpleHashFunction	INSTANCE

Method Summary

Modifier and Type	Method	Description
int	hash(CharSequence key)	Hashes a key, i.e. turns it into an integer for use in a HashTable.
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final SimpleHashFunction INSTANCE

Method Details

toString

public String toString()

Overrides:

toString in class Object

hash

public int hash(CharSequence key)

Hashes a key, i.e. turns it into an integer for use in a HashTable.

This implementation is the same hash function as Java's String.toString().

It does not delegate to String.toString() in order to protect against future changes in the JDK (?) or different JDK implementations, so that the resulting hash can safely be used for persistence (e.g. to route data to a file).

Specified by:

hash in interface HashFunction

Parameters:

key - A key to hash.

Returns:

A hash.