Package javax.ws.rs.sse

Class FactoryFinder

java.lang.Object

javax.ws.rs.sse.FactoryFinder

final class FactoryFinder
extends Object

Factory finder utility class.

Since:

2.1

Field Summary

Fields

Modifier and Type	Field	Description
private static final Logger	LOGGER

Constructor Summary

Constructors

Modifier	Constructor	Description
private	FactoryFinder()

Method Summary

Modifier and Type	Method	Description
(package private) static <T> Object	find(String factoryId, String fallbackClassName, Class<T> service)	Finds the implementation Class for the given factory name, or if that fails, finds the Class for the given fallback class name and create its instance.
private static ClassLoader	getContextClassLoader()
private static Object	newInstance(String className, ClassLoader classLoader)	Creates an instance of the specified class using the specified ClassLoader object.

Methods inherited from class java.lang.Object

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

Field Details

LOGGER

private static final Logger LOGGER

Constructor Details

FactoryFinder

private FactoryFinder()

Method Details

getContextClassLoader

private static ClassLoader getContextClassLoader()

newInstance

private static Object newInstance(String className,
 ClassLoader classLoader)
                           throws ClassNotFoundException

Creates an instance of the specified class using the specified ClassLoader object.

Parameters:

className - name of the class to be instantiated.

classLoader - class loader to be used.

Returns:

instance of the specified class.

Throws:

ClassNotFoundException - if the given class could not be found or could not be instantiated.

find

static <T> Object find(String factoryId,
 String fallbackClassName,
 Class<T> service)
                throws ClassNotFoundException

Finds the implementation Class for the given factory name, or if that fails, finds the Class for the given fallback class name and create its instance. The arguments supplied MUST be used in order. If using the first argument is successful, the second one will not be used.

This method is package private so that this code can be shared.

Type Parameters:

T - type of the service to be found.

Parameters:

factoryId - the name of the factory to find, which is a system property.

fallbackClassName - the implementation class name, which is to be used only if nothing else. is found; null to indicate that there is no fallback class name.

service - service to be found.

Returns:

the instance of the specified service; may not be null.

Throws:

ClassNotFoundException - if the given class could not be found or could not be instantiated.