Package org.hibernate.internal.util

Class NullnessHelper

java.lang.Object

org.hibernate.internal.util.NullnessHelper

public class NullnessHelper
extends Object

Method Summary

Modifier and Type	Method	Description
static boolean	areAllNonNull(Object... objects)
static boolean	areSameNullness(Object... values)	Ensures that either: all values are null all values are non-null
static <T> T	coalesce(T... values)	Operates like SQL coalesce expression, returning the first non-empty value
static <T> T	coalesceSuppliedValues(Function<T,Boolean> checker, Supplier<T>... valueSuppliers)	Operates like SQL coalesce expression, returning the first non-empty value
static <T> T	coalesceSuppliedValues(Supplier<T>... valueSuppliers)	Operates like SQL coalesce expression, returning the first non-empty value
static <T> T	nullif(T test, Supplier<T> fallbackSupplier)
static <T> T	nullif(T test, T fallback)

Methods inherited from class java.lang.Object

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

Method Detail

nullif

public static <T> T nullif(T test,
                           T fallback)

nullif

public static <T> T nullif(T test,
                           Supplier<T> fallbackSupplier)

coalesce

@SafeVarargs
public static <T> T coalesce(T... values)

Operates like SQL coalesce expression, returning the first non-empty value

Type Parameters:

T - Generic type of values to coalesce

Parameters:

values - The list of values.

Returns:

The first non-empty value, or null if all values were empty

Implementation Note:

This impl treats empty strings (`""`) as null.

coalesceSuppliedValues

@SafeVarargs
public static <T> T coalesceSuppliedValues(Supplier<T>... valueSuppliers)

Operates like SQL coalesce expression, returning the first non-empty value

Type Parameters:

T - Generic type of values to coalesce

Parameters:

valueSuppliers - List of value Suppliers

Returns:

The first non-empty value, or null if all values were empty

Implementation Note:

This impl treats empty strings (`""`) as null.

coalesceSuppliedValues

@SafeVarargs
public static <T> T coalesceSuppliedValues(Function<T,Boolean> checker,
                                           Supplier<T>... valueSuppliers)

Operates like SQL coalesce expression, returning the first non-empty value

Type Parameters:

T - Generic type of values to coalesce

Parameters:

valueSuppliers - List of value Suppliers

Returns:

The first non-empty value, or null if all values were empty

Implementation Note:

This impl treats empty strings (`""`) as null.

areSameNullness

public static boolean areSameNullness(Object... values)

Ensures that either:

• all values are null
• all values are non-null

areAllNonNull

public static boolean areAllNonNull(Object... objects)