javolution.util.function

Class Equalities

java.lang.Object

javolution.util.function.Equalities

public class Equalities
extends Object

A set of useful equalities comparators.

Version:

6.0, July 21, 2013

Author:

Jean-Marie Dautelle

Field Summary

Fields

Modifier and Type	Field and Description
static Equality<Object>	ARRAY A content array comparator.
static Equality<Object>	IDENTITY A comparator for which instances are only equals to themselves.
static Equality<CharSequence>	LEXICAL A lexicographic comparator for any CharSequence.
static Equality<CharSequence>	LEXICAL_CASE_INSENSITIVE A case insensitive lexicographic comparator for any CharSequence.
static Equality<CharSequence>	LEXICAL_FAST An optimized lexical comparator for any CharSequence taking a sample of few characters instead of the whole character sequence to calculate the hash code (still equality comparison checks all characters).
static Equality<Object>	STANDARD A standard object comparator (based on the object hashCode and equals methods).

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

STANDARD

@Parallelizable
@Realtime(limit=UNKNOWN)
public static final Equality<Object> STANDARD

A standard object comparator (based on the object hashCode and equals methods). Comparisons either use the object natural order (which should be consistent with equals) or an empirical method (if the object does not implement Comparable).

IDENTITY

@Parallelizable
@Realtime(limit=CONSTANT)
public static final Equality<Object> IDENTITY

A comparator for which instances are only equals to themselves. For comparisons an empirical method consistent with equals (== ) is used.

ARRAY

@Parallelizable
@Realtime(limit=LINEAR)
public static final Equality<Object> ARRAY

A content array comparator. If the content of an array is also an array (multi-dimensional arrays), that same comparator is used for equality and comparison (recursive). The standard comparator is used for non-array elements.

LEXICAL

@Parallelizable
@Realtime(limit=LINEAR)
public static final Equality<CharSequence> LEXICAL

A lexicographic comparator for any CharSequence.

LEXICAL_CASE_INSENSITIVE

@Parallelizable
@Realtime(limit=LINEAR)
public static final Equality<CharSequence> LEXICAL_CASE_INSENSITIVE

A case insensitive lexicographic comparator for any CharSequence.

LEXICAL_FAST

@Parallelizable
@Realtime(limit=LINEAR)
public static final Equality<CharSequence> LEXICAL_FAST

An optimized lexical comparator for any CharSequence taking a sample of few characters instead of the whole character sequence to calculate the hash code (still equality comparison checks all characters).