jakarta.enterprise.event

Enum Reception

java.lang.Object

java.lang.Enum<Reception>

jakarta.enterprise.event.Reception

All Implemented Interfaces:

Serializable, Comparable<Reception>

public enum Reception
extends Enum<Reception>

Distinguishes conditional observer methods from observer methods which are always notified.

A conditional observer method is an observer method which is notified of an event only if an instance of the bean that defines the observer method already exists in the current context.

Beans with scope @Dependent may not have conditional observer methods.

Author:

Gavin King, Dan Allen, David Allen

Enum Constant Summary

Enum Constants

Enum Constant and Description
ALWAYS Specifies that an observer method always receives event notifications.
IF_EXISTS Specifies that an observer method is only called if the current instance of the bean declaring the observer method already exists.

Method Summary

Modifier and Type	Method and Description
static Reception	valueOf(String name) Returns the enum constant of this type with the specified name.
static Reception[]	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

IF_EXISTS

public static final Reception IF_EXISTS

Specifies that an observer method is only called if the current instance of the bean declaring the observer method already exists.

If there is no active context for the scope to which the bean declaring this observer method belongs, then the observer method is not called.

ALWAYS

public static final Reception ALWAYS

Specifies that an observer method always receives event notifications.

Method Detail

values

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

Returns:

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

valueOf

public static Reception 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