com.mmnaseri.utils.spring.data.query

Enum NullHandling

java.lang.Object

java.lang.Enum<NullHandling>

com.mmnaseri.utils.spring.data.query.NullHandling

All Implemented Interfaces:

Serializable, Comparable<NullHandling>

public enum NullHandling
extends Enum<NullHandling>

This enum is used to indicate how null values should be handled when compared to non-null values.

Since:

1.0 (9/17/15)

Author:

Milad Naseri (mmnaseri@programmer.net)

Enum Constant Summary

Enum Constants

Enum Constant and Description
DEFAULT Pick one of the above as per the specifications of the underlying data store.
NULLS_FIRST The null values should come before non-null values.
NULLS_LAST The null values should appear last when compared to non-null values.

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

NULLS_FIRST

public static final NullHandling NULLS_FIRST

The null values should come before non-null values.

NULLS_LAST

public static final NullHandling NULLS_LAST

The null values should appear last when compared to non-null values.

DEFAULT

public static final NullHandling DEFAULT

Pick one of the above as per the specifications of the underlying data store.

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