org.springframework.osgi.service.importer.support
Class Cardinality

java.lang.Object
  org.springframework.core.enums.AbstractLabeledEnum
      org.springframework.core.enums.StaticLabeledEnum
          org.springframework.osgi.service.importer.support.Cardinality

All Implemented Interfaces:

Serializable, Comparable, LabeledEnum

public class Cardinality
extends StaticLabeledEnum

Enum-like class containing the OSGi importer services cardinality. Indicates the number of expected matching services and whether the presence is mandatory or not.

Author:

Costin Leau

See Also:

Serialized Form

Field Summary

static Cardinality	C_0__1 Optional, single cardinality.
static Cardinality	C_0__N Optional, multiple cardinality.
static Cardinality	C_1__1 Mandatory, single cardinality.
static Cardinality	C_1__N Mandatory, multiple cardinality.

Fields inherited from interface org.springframework.core.enums.LabeledEnum

CODE_ORDER, DEFAULT_ORDER, LABEL_ORDER

Method Summary

boolean	isMandatory() Indicates if this cardinality implies that at least one service is expected (mandatory cardinality).
boolean	isMultiple() Indicates if this cardinality implies that multiple services are expected.
boolean	isOptional() Indicates if this cardinality implies that is acceptable for no matching services to be found.
boolean	isSingle() Indicates if this cardinality implies that at most one service is expected.

Methods inherited from class org.springframework.core.enums.StaticLabeledEnum

getCode, getLabel, readResolve, shortValue

Methods inherited from class org.springframework.core.enums.AbstractLabeledEnum

compareTo, equals, getType, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

C_0__1

public static final Cardinality C_0__1

Optional, single cardinality. At most one OSGi service is expected. This cardinality indicates an OSGi service reference proxy.

C_0__N

public static final Cardinality C_0__N

Optional, multiple cardinality. Zero, one or multiple OSGi services are expected. This cardinality indicates an OSGi service managed collection.

C_1__1

public static final Cardinality C_1__1

Mandatory, single cardinality. Exactly one OSGi service is expected. This cardinality indicates an OSGi service reference proxy.

C_1__N

public static final Cardinality C_1__N

Mandatory, multiple cardinality. At least one OSGi service is expected. This cardinality indicates an OSGi service managed collection.

Method Detail

isSingle

public boolean isSingle()

Indicates if this cardinality implies that at most one service is expected.

Returns:

true if the given cardinality is single, false otherwise

isMultiple

public boolean isMultiple()

Indicates if this cardinality implies that multiple services are expected.

Returns:

true if this cardinality is multiple, false otherwise

isMandatory

public boolean isMandatory()

Indicates if this cardinality implies that at least one service is expected (mandatory cardinality).

Returns:

true if this cardinality is mandatory, false otherwise

isOptional

public boolean isOptional()

Indicates if this cardinality implies that is acceptable for no matching services to be found.

Returns:

true if this cardinality is optional, false otherwise