net.spy.util
Class Instantiator<C>

java.lang.Object
  net.spy.SpyObject
      net.spy.util.Instantiator<C>

Type Parameters:

C - the type of object to be instantiated.

public class Instantiator<C>
extends SpyObject

Generic object instantiator. The factory factory.

Constructor Summary

protected	Instantiator() Default constructor to allow subclasses to figure out how they want to build their instance.
	Instantiator(String className) Create an instantiator for the given class name.
	Instantiator(String className, ClassLoader cl) Create an instantiator for the given class name in the given class loader.

Method Summary

protected C	createInstance(String className) Create an instance of the given class (expected to be a C).
protected C	createInstance(String className, ClassLoader cl) Create an instance of the given class (expected to be a C).
C	getInstance() Get the instantiated instance.
protected void	setInstance(C i) Set the instance.

Methods inherited from class net.spy.SpyObject

getLogger

Methods inherited from class java.lang.Object

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

Constructor Detail

Instantiator

protected Instantiator()
                throws Exception

Default constructor to allow subclasses to figure out how they want to build their instance. It's expected that the instance will be set after this invocation.

Throws:

Exception

See Also:

setInstance(Object)

Instantiator

public Instantiator(String className)
             throws Exception

Create an instantiator for the given class name.

Parameters:

className - the name of the class to instantiate

Throws:

Exception - if the instance can't be instantiated

Instantiator

public Instantiator(String className,
                    ClassLoader cl)
             throws Exception

Create an instantiator for the given class name in the given class loader.

Parameters:

className - the name of the class to load

cl - the class loader to use to instantiate the class

Throws:

Exception - if the instance can't be instantiated

Method Detail

setInstance

protected void setInstance(C i)

Set the instance. This may only be invoked once.

Parameters:

i - the instance

createInstance

protected C createInstance(String className)
                    throws Exception

Create an instance of the given class (expected to be a C).

Parameters:

className - the name of the class

Returns:

the new instance

Throws:

Exception - if the class can't be instantiated

createInstance

protected C createInstance(String className,
                           ClassLoader cl)
                    throws Exception

Create an instance of the given class (expected to be a C).

Parameters:

className - the name of the class

Returns:

the new instance

Throws:

Exception - if the class can't be instantiated

getInstance

public C getInstance()
              throws Exception

Get the instantiated instance.

Throws:

Exception