com.holonplatform.core.internal

Class ClassLoaderScope

java.lang.Object

com.holonplatform.core.internal.ClassLoaderScope

All Implemented Interfaces:

ContextScope

public class ClassLoaderScope
extends Object
implements ContextScope

A ContextScope for ClassLoader-scoped singleton context resources.

Since:

5.0.0

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_ORDER Default scope order

Constructor Summary

Constructors

Constructor and Description
ClassLoaderScope()

Method Summary

Modifier and Type	Method and Description
<T> Optional<T>	get(String resourceKey, Class<T> resourceType) Try to obtain the resource identified by given resourceKey and with expected resourceType.
String	getName() Gets the scope name.
int	getOrder() Gets the scope order.
<T> Optional<T>	put(String resourceKey, T value) Stores a resource reference identified by given resourceKey.
<T> Optional<T>	putIfAbsent(String resourceKey, T value) Stores a resource reference identified by given resourceKey, only if there is not a resource instance already bound to given key.
boolean	remove(String resourceKey) Removes the resource reference bound to the given resourceKey from scope, if any.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_ORDER

public static final int DEFAULT_ORDER

Default scope order

See Also:

Constant Field Values

Constructor Detail

ClassLoaderScope

public ClassLoaderScope()

Method Detail

getName

public String getName()

Description copied from interface: ContextScope

Gets the scope name. Scope name must be unique among all registered context scopes.

Specified by:

getName in interface ContextScope

Returns:

the scope name

getOrder

public int getOrder()

Description copied from interface: ContextScope

Gets the scope order. Lower order values mean highest precedence.

Specified by:

getOrder in interface ContextScope

Returns:

the scope order

get

public <T> Optional<T> get(String resourceKey,
                           Class<T> resourceType)
                    throws TypeMismatchException

Description copied from interface: ContextScope

Try to obtain the resource identified by given resourceKey and with expected resourceType.

Specified by:

get in interface ContextScope

Type Parameters:

T - Resource type

Parameters:

resourceKey - Resource key (not null)

resourceType - Expected resource type (not null)

Returns:

Optional resource instance, an empty Optional if resource is not available from scope according to scope resource provisioning strategy

Throws:

TypeMismatchException - If a resource is available but the expected type is not compatible with the resource type

put

public <T> Optional<T> put(String resourceKey,
                           T value)
                    throws UnsupportedOperationException

Description copied from interface: ContextScope

Stores a resource reference identified by given resourceKey.

Specified by:

put in interface ContextScope

Type Parameters:

T - Resource instance type

Parameters:

resourceKey - Resource key (not null)

value - Resource instance. If null, if a previous resource was bound to given resource key, it will be removed from scope.

Returns:

Optional previous resource instance bound to given key

Throws:

UnsupportedOperationException - If the concrete scope implementation does not support this operation

putIfAbsent

public <T> Optional<T> putIfAbsent(String resourceKey,
                                   T value)
                            throws UnsupportedOperationException

Description copied from interface: ContextScope

Stores a resource reference identified by given resourceKey, only if there is not a resource instance already bound to given key.

Specified by:

putIfAbsent in interface ContextScope

Type Parameters:

T - Resource instance type

Parameters:

resourceKey - Resource key (not null)

value - Resource instance, if null, this method should do nothing.

Returns:

Optional previous resource instance bound to given key. If there was no resource already bound to the key, an empty Optional is returned, meaning the given value has been associated to the resource key.

Throws:

UnsupportedOperationException - If the concrete scope implementation does not support this operation

remove

public boolean remove(String resourceKey)
               throws UnsupportedOperationException

Description copied from interface: ContextScope

Removes the resource reference bound to the given resourceKey from scope, if any.

Specified by:

remove in interface ContextScope

Parameters:

resourceKey - Resource key (not null)

Returns:

true if a resource instance was bound to the given key and it's been removed, false otherwise.

Throws:

UnsupportedOperationException - If the concrete scope implementation does not support this operation