de.digitalcollections.core.model.api.paging.enums

Enum NullHandling

java.lang.Object

java.lang.Enum<NullHandling>

de.digitalcollections.core.model.api.paging.enums.NullHandling

All Implemented Interfaces:

Serializable, Comparable<NullHandling>

public enum NullHandling
extends Enum<NullHandling>

Enumeration for null handling hints that can be used in Order expressions. See Spring Data Commons, but more flat design and independent of Spring libraries.

Enum Constant Summary

Enum Constants

Enum Constant and Description
NATIVE Lets the data store decide what to do with nulls.
NULLS_FIRST A hint to the used data store to order entries with null values before non null entries.
NULLS_LAST A hint to the used data store to order entries with null values after non null entries.

Method Summary

Modifier and Type	Method and Description
static NullHandling	valueOf(String name) Returns the enum constant of this type with the specified name.
static NullHandling[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

NATIVE

public static final NullHandling NATIVE

Lets the data store decide what to do with nulls.

NULLS_FIRST

public static final NullHandling NULLS_FIRST

A hint to the used data store to order entries with null values before non null entries.

NULLS_LAST

public static final NullHandling NULLS_LAST

A hint to the used data store to order entries with null values after non null entries.

Method Detail

values

public static NullHandling[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (NullHandling c : NullHandling.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static NullHandling valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null