Module jakarta.activation

Package jakarta.activation

Class FactoryFinder

java.lang.Object

jakarta.activation.FactoryFinder

class FactoryFinder
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
private static final ServiceLoaderUtil.ExceptionHandler<RuntimeException>	EXCEPTION_HANDLER
private static final Logger	logger
private static final String	OSGI_SERVICE_LOADER_CLASS_NAME

Constructor Summary

Constructors

Constructor	Description
FactoryFinder()

Method Summary

Modifier and Type	Method	Description
(package private) static <T> T	find(Class<T> factoryClass, String defaultClassName, boolean tryFallback)	Finds the implementation Class object for the given factory type.
private static String	fromSystemProperty(String factoryId)
private static String	getSystemProperty(String property)
private static boolean	isOsgi()
private static void	logFound(String value)
private static <T> T	lookupUsingOSGiServiceLoader(String factoryId)
private static <T> T	newInstance(String className, String defaultClassName, ClassLoader tccl)

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

EXCEPTION_HANDLER

private static final ServiceLoaderUtil.ExceptionHandler<RuntimeException> EXCEPTION_HANDLER

OSGI_SERVICE_LOADER_CLASS_NAME

private static final String OSGI_SERVICE_LOADER_CLASS_NAME

See Also:

• Constant Field Values

Constructor Details

FactoryFinder

FactoryFinder()

Method Details

find

static <T> T find(Class<T> factoryClass,
 String defaultClassName,
 boolean tryFallback)
           throws RuntimeException

Finds the implementation Class object for the given factory type. If it fails and tryFallback is true finds the Class object for the given default class name. The arguments supplied must be used in order Note the default class name may be needed even if fallback is not to be attempted in order to check if requested type is fallback.

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

Parameters:

factoryClass - factory abstract class or interface to be found

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

tryFallback - whether to try the default class as a fallback

Returns:

the Class object of the specified message factory; may not be null

Throws:

RuntimeException - if there is no factory found

newInstance

private static <T> T newInstance(String className,
 String defaultClassName,
 ClassLoader tccl)
                          throws RuntimeException

Throws:

RuntimeException

fromSystemProperty

private static String fromSystemProperty(String factoryId)

getSystemProperty

private static String getSystemProperty(String property)

logFound

private static void logFound(String value)

isOsgi

private static boolean isOsgi()

lookupUsingOSGiServiceLoader

private static <T> T lookupUsingOSGiServiceLoader(String factoryId)