org.osgi.service.component.annotations

Enum ReferencePolicy

java.lang.Object

java.lang.Enum<ReferencePolicy>

org.osgi.service.component.annotations.ReferencePolicy

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<ReferencePolicy>

public enum ReferencePolicy
extends java.lang.Enum<ReferencePolicy>

Policy for the Reference annotation.

Author:

$Id: 835125670fa25ca1205beacabbb2d4cfa5896fd4 $

Enum Constant Summary

Enum Constants

Enum Constant and Description
DYNAMIC The dynamic policy is slightly more complex since the component implementation must properly handle changes in the set of bound services.
STATIC The static policy is the most simple policy and is the default policy.

Method Summary

Methods

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

STATIC

public static final ReferencePolicy STATIC

The static policy is the most simple policy and is the default policy. A component instance never sees any of the dynamics. Component configurations are deactivated before any bound service for a reference having a static policy becomes unavailable. If a target service is available to replace the bound service which became unavailable, the component configuration must be reactivated and bound to the replacement service.

DYNAMIC

public static final ReferencePolicy DYNAMIC

The dynamic policy is slightly more complex since the component implementation must properly handle changes in the set of bound services. With the dynamic policy, SCR can change the set of bound services without deactivating a component configuration. If the component uses the event strategy to access services, then the component instance will be notified of changes in the set of bound services by calls to the bind and unbind methods.

Method Detail

values

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

Returns:

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

valueOf

public static ReferencePolicy valueOf(java.lang.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:

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

java.lang.NullPointerException - if the argument is null

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Enum<ReferencePolicy>