Module gov.nist.secauto.metaschema.core

Package gov.nist.secauto.metaschema.core.util

Class ObjectUtils

java.lang.Object

gov.nist.secauto.metaschema.core.util.ObjectUtils

public final class ObjectUtils
extends Object

Method Summary

Modifier and Type	Method	Description
static <T> T	asNullableType(Object obj)
static <T> T	asType(Object obj)
static <T> Stream<T>	filterNull(T item)	A filter used to remove null items from a stream.
static <T> T	notNull(T obj)	Assert that the provided object is not null.
static <T> T	requireNonNull(T obj)	Require a non-null value.
static <T> T	requireNonNull(T obj, String message)	Require a non-null value.

Methods inherited from class java.lang.Object

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

Method Detail

notNull

@NonNull
public static <T> T notNull(T obj)

Assert that the provided object is not null.

This method sets the expectation that the provided object is not null in cases where a non-null value is required.

Type Parameters:

T - the object type

Parameters:

obj - the object

Returns:

the object

requireNonNull

@NonNull
public static <T> T requireNonNull(T obj)

Require a non-null value.

Type Parameters:

T - the type of the reference

Parameters:

obj - the object reference to check for nullity

Returns:

obj if not null

Throws:

NullPointerException - if obj is null

requireNonNull

@NonNull
public static <T> T requireNonNull(T obj,
                                   @NonNull
                                   String message)

Require a non-null value.

Type Parameters:

T - the type of the reference

Parameters:

obj - the object reference to check for nullity

message - detail message to be used in the event that a NullPointerException is thrown

Returns:

obj if not null

Throws:

NullPointerException - if obj is null

filterNull

@NonNull
public static <T> Stream<T> filterNull(T item)

A filter used to remove null items from a stream.

Type Parameters:

T - the item type

Parameters:

item - the item to filter

Returns:

the item as a steam or an empty stream if the item is null

asType

@NonNull
public static <T> T asType(@NonNull
                           Object obj)

asNullableType

public static <T> T asNullableType(Object obj)