Package org.apache.activemq.util

Class FactoryFinder<T>

java.lang.Object

org.apache.activemq.util.FactoryFinder<T>

public class FactoryFinder<T>
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	FactoryFinder.ObjectFactory	The strategy that the FactoryFinder uses to find load and instantiate Objects can be changed out by calling the setObjectFactory(org.apache.activemq.util.FactoryFinder.ObjectFactory) method with a custom implementation of ObjectFactory.
protected static class	FactoryFinder.StandaloneObjectFactory	The default implementation of Object factory which works well in standalone applications.

Constructor Summary

Constructors

Constructor	Description
FactoryFinder(String path, Class<T> requiredType, String allowedImpls)

Method Summary

Modifier and Type	Method	Description
static String	buildAllowedImpls(Class<?>... classes)
static boolean	containsPathSeparators(String str)
static FactoryFinder.ObjectFactory	getObjectFactory()
T	newInstance(String key)	Creates a new instance of the given key
static void	setObjectFactory(FactoryFinder.ObjectFactory objectFactory)
static <T> void	validateClass(Class<?> clazz, Class<T> requiredType, Set<Class<? extends T>> allowedImpls)

Methods inherited from class java.lang.Object

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

Constructor Details

FactoryFinder

public FactoryFinder(String path,
 Class<T> requiredType,
 String allowedImpls)

Parameters:

path - The path to search for impls

requiredType - Required interface type that any impl must implement

allowedImpls - The list of allowed implementations. If null or asterisk then all impls of the requiredType are allowed.

Method Details

getObjectFactory

public static FactoryFinder.ObjectFactory getObjectFactory()

setObjectFactory

public static void setObjectFactory(FactoryFinder.ObjectFactory objectFactory)

newInstance

public T newInstance(String key)
              throws IllegalAccessException,
InstantiationException,
IOException,
ClassNotFoundException

Creates a new instance of the given key

Parameters:

key - is the key to add to the path to find a text file containing the factory name

Returns:

a newly created instance

Throws:

IllegalAccessException

InstantiationException

IOException

ClassNotFoundException

containsPathSeparators

public static boolean containsPathSeparators(String str)

buildAllowedImpls

public static String buildAllowedImpls(Class<?>... classes)

validateClass

public static <T> void validateClass(Class<?> clazz,
 Class<T> requiredType,
 Set<Class<? extends T>> allowedImpls)
                              throws InstantiationException

Throws:

InstantiationException