org.apache.polygene.api.service.importer

Class InstanceImporter<T>

java.lang.Object

org.apache.polygene.api.service.importer.InstanceImporter<T>

All Implemented Interfaces:

ServiceImporter<T>

public final class InstanceImporter<T>
extends Object
implements ServiceImporter<T>

Return a predefined service instance that was provided as meta-info. Search for meta-info in the following order: the service itself, the module of the service, the layer of the service, the whole application.

Constructor Summary

Constructors

Constructor and Description
InstanceImporter()

Method Summary

Modifier and Type	Method and Description
T	importService(ImportedServiceDescriptor serviceDescriptor) Imports an instance of the service type described in the service descriptor.
boolean	isAvailable(T instance) Ask if the service is available or not.

Methods inherited from class java.lang.Object

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

Constructor Detail

InstanceImporter

public InstanceImporter()

Method Detail

importService

public T importService(ImportedServiceDescriptor serviceDescriptor)
                throws ServiceImporterException

Description copied from interface: ServiceImporter

Imports an instance of the service type described in the service descriptor.

Specified by:

importService in interface ServiceImporter<T>

Parameters:

serviceDescriptor - The service descriptor.

Returns:

The imported service instance.

Throws:

ServiceImporterException - if import failed.

isAvailable

public boolean isAvailable(T instance)

Description copied from interface: ServiceImporter

Ask if the service is available or not.

Specified by:

isAvailable in interface ServiceImporter<T>

Parameters:

instance - the instance to be checked

Returns:

true if the service is available, false if not