Enum Class InstanceMode

java.lang.Object

java.lang.Enum<InstanceMode>

org.refcodes.decoupling.InstanceMode

All Implemented Interfaces:

Serializable, Comparable<InstanceMode>, Constable, InstanceMetrics

public enum InstanceMode
extends Enum<InstanceMode>
implements InstanceMetrics

The InstanceMode describes how an instance for a Dependency is managed (instantiated).

Nested Class Summary

Nested classes/interfaces inherited from class Enum

Enum.EnumDesc<E>

Enum Constant Summary

Enum Constants

Enum Constant	Description
INSTANCE_IS_MANDATORY	At least one instance is required and created in any case, not only when being demanded, though each time an instance is demanded(!)
INSTANCE_ON_DEMAND	Each time an instance is demanded(!)
SINGLETON_BY_DEFAULT	Technically identical to SINGLETON_IS_MANDATORY with emphasizing on the semantics of being a default Dependency, usually used by (sub-classes of) the Reactor type to emphasize that the Dependency is part of the implementation (singleton = yes, required = yes).
SINGLETON_IS_MANDATORY	Just a single instance is required and created in any case, not only when when demanded by other dependencies, no matter how often the instance is being demanded (singleton = yes, required = yes).
SINGLETON_ON_DEMAND	Just a single instance is created on demanded(!)

Method Summary

Modifier and Type	Method	Description
boolean	isMandatory()	True in case a Dependency is required to be instantiated in any case, even if not being demanded by another dependency.
boolean	isSingleton()	True in case the Dependency represents a singleton.
static InstanceMetrics[]	toRequiredModes()	Retrieves all InstanceMode elements representing a required instances.
static InstanceMetrics[]	toSingletonModes()	Retrieves all InstanceMode elements representing a singleton.
static InstanceMode	valueOf(String name)	Returns the enum constant of this class with the specified name.
static InstanceMode[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

SINGLETON_BY_DEFAULT

public static final InstanceMode SINGLETON_BY_DEFAULT

Technically identical to SINGLETON_IS_MANDATORY with emphasizing on the semantics of being a default Dependency, usually used by (sub-classes of) the Reactor type to emphasize that the Dependency is part of the implementation (singleton = yes, required = yes).

SINGLETON_IS_MANDATORY

public static final InstanceMode SINGLETON_IS_MANDATORY

Just a single instance is required and created in any case, not only when when demanded by other dependencies, no matter how often the instance is being demanded (singleton = yes, required = yes).

INSTANCE_IS_MANDATORY

public static final InstanceMode INSTANCE_IS_MANDATORY

At least one instance is required and created in any case, not only when being demanded, though each time an instance is demanded(!) by other dependencies, a new instance is returned (the first time an instance is demanded, the initially created instance is injected, singleton = false, required = yes).

SINGLETON_ON_DEMAND

public static final InstanceMode SINGLETON_ON_DEMAND

Just a single instance is created on demanded(!) by other dependencies, no matter how often the instance is being demanded (singleton = yes, required = no).

INSTANCE_ON_DEMAND

public static final InstanceMode INSTANCE_ON_DEMAND

Each time an instance is demanded(!) by other dependencies, a new instance is returned (singleton = no, required = no).

Method Details

values

public static InstanceMode[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

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

valueOf

public static InstanceMode valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (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 class has no constant with the specified name

NullPointerException - if the argument is null

isSingleton

public boolean isSingleton()

True in case the Dependency represents a singleton.

Specified by:

isSingleton in interface InstanceMetrics

Returns:

True in case of being a singleton Dependency.

isMandatory

public boolean isMandatory()

True in case a Dependency is required to be instantiated in any case, even if not being demanded by another dependency.

Specified by:

isMandatory in interface InstanceMetrics

Returns:

True in case of being a required Dependency.

toSingletonModes

public static InstanceMetrics[] toSingletonModes()

Retrieves all InstanceMode elements representing a singleton.

Returns:

The singleton elements.

toRequiredModes

public static InstanceMetrics[] toRequiredModes()

Retrieves all InstanceMode elements representing a required instances.

Returns:

The required instances elements.