de.intarsys.tools.factory

Class FactoryTools

java.lang.Object

de.intarsys.tools.factory.FactoryTools

public class FactoryTools
extends Object

Constructor Summary

Constructors

Constructor and Description
FactoryTools()

Method Summary

Methods

Modifier and Type	Method and Description
static IFactory	createFactory(Object value, Object defaultValue) Create an IFactory from an object.
static <T extends IFactory<?>> T	lookupFactory(Class<T> clazz) Lookup the IFactory instance for a factory class.
static IFactory<?>	lookupFactory(String id, ClassLoader classLoader) Lookup the IFactory instance for an id.
static <T> IFactory<T>	lookupFactoryFor(Class<T> clazz) Lookup the IFactory instance for target clazz.

Methods inherited from class java.lang.Object

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

Constructor Detail

FactoryTools

public FactoryTools()

Method Detail

createFactory

public static IFactory createFactory(Object value,
                     Object defaultValue)
                              throws ObjectCreationException

Create an IFactory from an object.

Parameters:

object -

defaultValue - The default value to be used

Returns:

An IFactory

Throws:

ObjectCreationException

lookupFactory

public static <T extends IFactory<?>> T lookupFactory(Class<T> clazz)

Lookup the IFactory instance for a factory class. This tool method assumes the IFactory instance is registered with its class name.

If no such IFactory is registered, this method tries to create and register a new one.

If no IFactory is registered and can't be created, null is returned.

Parameters:

clazz -

Returns:

the IFactory instance for a factory class

lookupFactory

public static IFactory<?> lookupFactory(String id,
                        ClassLoader classLoader)

Lookup the IFactory instance for an id.

If no such IFactory is registered, this method tries to create and register a new one by interpreting the id as a class name. First we check if id represents an IFactory implementation itself, if this fails a generic IFactory creating instances of type "id" is built.

If no IFactory is registered and can't be created, null is returned.

Parameters:

id -

classLoader -

Returns:

the IFactory instance for an id.

lookupFactoryFor

public static <T> IFactory<T> lookupFactoryFor(Class<T> clazz)

Lookup the IFactory instance for target clazz. This method tries to derive the factory by searching the IFactory with appropriate types. If not available it tries to lookup an IFactory by appending "Factory" to the clazz name and using it as an id.

If no such IFactory is registered, this method tries to create and register a new one by interpreting the id as a class name.

If no IFactory is registered and can't be created, null is returned.

Parameters:

clazz -

Returns:

the IFactory instance for target object class