org.graalvm.collections

Class Equivalence

java.lang.Object

org.graalvm.collections.Equivalence

public abstract class Equivalence
extends Object

Strategy for comparing two objects. Default predefined strategies are Equivalence.DEFAULT, Equivalence.IDENTITY, and Equivalence.IDENTITY_WITH_SYSTEM_HASHCODE.

Since:

1.0

Field Summary

Fields

Modifier and Type	Field and Description
static Equivalence	DEFAULT Default equivalence calling Object.equals(Object) to check equality and Object.hashCode() for obtaining hash values.
static Equivalence	IDENTITY Identity equivalence using == to check equality and Object.hashCode() for obtaining hash values.
static Equivalence	IDENTITY_WITH_SYSTEM_HASHCODE Identity equivalence using == to check equality and System.identityHashCode(Object) for obtaining hash values.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Equivalence() Subclass for creating custom equivalence definitions.

Method Summary

Modifier and Type	Method and Description
abstract boolean	equals(Object a, Object b) Returns true if the non-null arguments are equal to each other and false otherwise.
abstract int	hashCode(Object o) Returns the hash code of a non-null argument o.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT

public static final Equivalence DEFAULT

Default equivalence calling Object.equals(Object) to check equality and Object.hashCode() for obtaining hash values. Do not change the logic of this class as it may be inlined in other places.

Since:

1.0

IDENTITY

public static final Equivalence IDENTITY

Identity equivalence using == to check equality and Object.hashCode() for obtaining hash values. Do not change the logic of this class as it may be inlined in other places.

Since:

1.0

IDENTITY_WITH_SYSTEM_HASHCODE

public static final Equivalence IDENTITY_WITH_SYSTEM_HASHCODE

Identity equivalence using == to check equality and System.identityHashCode(Object) for obtaining hash values. Do not change the logic of this class as it may be inlined in other places.

Since:

1.0

Constructor Detail

Equivalence

protected Equivalence()

Subclass for creating custom equivalence definitions.

Since:

1.0

Method Detail

equals

public abstract boolean equals(Object a,
                               Object b)

Returns true if the non-null arguments are equal to each other and false otherwise.

Since:

1.0

hashCode

public abstract int hashCode(Object o)

Returns the hash code of a non-null argument o.

Since:

1.0