net.shibboleth.utilities.java.support.primitive

Class ObjectSupport

java.lang.Object

net.shibboleth.utilities.java.support.primitive.ObjectSupport

public final class ObjectSupport
extends Object

Helper methods for working with Objects.

Constructor Summary

Constructors

Modifier	Constructor and Description
private	ObjectSupport() Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
static <T> T	firstNonNull(T... objects) Return the first from a list of arguments that is non-null, or null if all arguments are null.
static int	hashCode(Object o) Performs a safe (null-aware) Object.hashCode().

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectSupport

private ObjectSupport()

Constructor.

Method Detail

hashCode

public static int hashCode(@Nullable
           Object o)

Performs a safe (null-aware) Object.hashCode().

Parameters:

o - object for which to get the hash code, may be null

Returns:

the hash code for the object of 0 if the given object is null

firstNonNull

@Nullable
public static <T> T firstNonNull(@Nullable
                          T... objects)

Return the first from a list of arguments that is non-null, or null if all arguments are null.

This is similar to Guava's MoreObjects.firstNonNull(Object, Object), except it takes more than 2 arguments, and also doesn't throw a null pointer exception if all arguments are null.

Type Parameters:

T - the type of arguments being evaluated

Parameters:

objects - the list of object references to evaluate

Returns:

the first non-null argument, or null if all arguments are null