Package jakarta.el

Class FactoryFinder

java.lang.Object

jakarta.el.FactoryFinder

class FactoryFinder
extends Object

Constructor Summary

Constructors

Constructor	Description
FactoryFinder()

Method Summary

Modifier and Type	Method	Description
(package private) static Object	find(Class<?> serviceClass, String factoryId, String fallbackClassName, Properties properties)	Finds the implementation Class object for the given factory.
private static Object	newInstance(String className, ClassLoader classLoader, Properties properties)	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

Constructor Details

FactoryFinder

FactoryFinder()

Method Details

newInstance

private static Object newInstance(String className,
 ClassLoader classLoader,
 Properties properties)

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

Throws:

ELException - if the given class could not be found or could not be instantiated

find

static Object find(Class<?> serviceClass,
 String factoryId,
 String fallbackClassName,
 Properties properties)

Finds the implementation Class object for the given factory. The following search order is used:

1. ServiceLoader lookup using serviceClass
2. Property file located as $java.home/lib/el.properties
3. System property lookup using factoryId
4. Create an instance of fallbackClassName

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

Parameters:

serviceClass - The class to use when searching for the factory using the ServiceLoader mechanism

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

Returns:

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

Throws:

ELException - if there is an error