org.hibernate

Enum NullPrecedence

java.lang.Object

java.lang.Enum<NullPrecedence>

org.hibernate.NullPrecedence

All Implemented Interfaces:

Serializable, Comparable<NullPrecedence>

public enum NullPrecedence
extends Enum<NullPrecedence>

Defines precedence of null values within ORDER BY clause.

Author:

Lukasz Antoniak (lukasz dot antoniak at gmail dot com)

Enum Constant Summary

Enum Constants

Enum Constant and Description
FIRST Null values appear at the beginning of the sorted collection.
LAST Null values appear at the end of the sorted collection.
NONE Null precedence not specified.

Method Summary

Modifier and Type	Method and Description
static NullPrecedence	parse(String name) Interprets a string representation of a NullPrecedence, returning null by default.
static NullPrecedence	parse(String name, NullPrecedence defaultValue) Interprets a string representation of a NullPrecedence, returning the specified default if not recognized.
static NullPrecedence	valueOf(String name) Returns the enum constant of this type with the specified name.
static NullPrecedence[]	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

NONE

public static final NullPrecedence NONE

Null precedence not specified. Relies on the RDBMS implementation.

FIRST

public static final NullPrecedence FIRST

Null values appear at the beginning of the sorted collection.

LAST

public static final NullPrecedence LAST

Null values appear at the end of the sorted collection.

Method Detail

values

public static NullPrecedence[] 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 (NullPrecedence c : NullPrecedence.values())
    System.out.println(c);

Returns:

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

valueOf

public static NullPrecedence 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

parse

public static NullPrecedence parse(String name)

Interprets a string representation of a NullPrecedence, returning null by default. For alternative default handling, see parse(String, NullPrecedence)

Parameters:

name - The String representation to interpret

Returns:

The recognized NullPrecedence, or null

parse

public static NullPrecedence parse(String name,
                                   NullPrecedence defaultValue)

Interprets a string representation of a NullPrecedence, returning the specified default if not recognized.

Parameters:

name - The String representation to interpret

defaultValue - The default value to use

Returns:

The recognized NullPrecedence, or defaultValue.