org.osgi.service.component.annotations

Enum ReferenceCardinality

java.lang.Object

java.lang.Enum<ReferenceCardinality>

org.osgi.service.component.annotations.ReferenceCardinality

All Implemented Interfaces:

Serializable, Comparable<ReferenceCardinality>

public enum ReferenceCardinality
extends Enum<ReferenceCardinality>

Cardinality for the Reference annotation.

Specifies if the reference is optional and if the component implementation support a single bound service or multiple bound services.

Enum Constant Summary

Enum Constants

Enum Constant and Description
AT_LEAST_ONE The reference is mandatory and multiple.
MANDATORY The reference is mandatory and unary.
MULTIPLE The reference is optional and multiple.
OPTIONAL The reference is optional and unary.

Method Summary

Methods

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

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

OPTIONAL

public static final ReferenceCardinality OPTIONAL

The reference is optional and unary. That is, the reference has a cardinality of 0..1.

MANDATORY

public static final ReferenceCardinality MANDATORY

The reference is mandatory and unary. That is, the reference has a cardinality of 1..1.

MULTIPLE

public static final ReferenceCardinality MULTIPLE

The reference is optional and multiple. That is, the reference has a cardinality of 0..n.

AT_LEAST_ONE

public static final ReferenceCardinality AT_LEAST_ONE

The reference is mandatory and multiple. That is, the reference has a cardinality of 1..n.

Method Detail

values

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

Returns:

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

valueOf

public static ReferenceCardinality 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

toString

public String toString()

Overrides:

toString in class Enum<ReferenceCardinality>