ServiceSelectorImporter (Apache Zest™ (Java Edition) SDK 2.1)

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java.lang.Object
- org.qi4j.api.service.importer.ServiceSelectorImporter<T>

All Implemented Interfaces:

ServiceImporter<T>
```
public final class ServiceSelectorImporter<T>
extends Object
implements ServiceImporter<T>
```
If several services are available with a given type, and you want to constrain the current module to use a specific one, then use this importer. Specify a Specification<ServiceReference<T>> criteria as meta-info for the service, which will be applied to the list of available services, and the first match will be chosen. This importer will avoid selecting itself, as could be possible if the ServiceQualifier.first() filter is used.

Constructor Summary

Constructors
Constructor and Description

ServiceSelectorImporter()

Method Summary

Methods
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
  - ServiceSelectorImporter
```
public ServiceSelectorImporter()
```
- 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

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