iaik.utils

Class ObjectFactory

java.lang.Object

iaik.utils.ObjectFactory

public class ObjectFactory
extends java.lang.Object

This class can be used to manage classes for dynamic instantiation. It works similar as class Factory but does not support singletons and does not synchronize on Object creation because implementing classes are usually registered only once.

Version:

File Revision 8

Constructor Summary

Constructors

Constructor and Description
ObjectFactory() Creates a new ObjectFactory.
ObjectFactory(int size) Creates a new ObjectFactory with the given repository size.
ObjectFactory(int size, java.lang.Class objectClass) Creates a new ObjectFactory with the given repository size for registration of implementation of the given class.

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.Object	create(java.lang.Class implementation) Creates a new instance of the given class.
java.lang.Object	create(java.lang.Object type) Creates an instance of a class implementing the given type.
void	register(java.lang.Object type, java.lang.Class implementation) Registers a class as implementation of the given type.
void	register(java.lang.Object type, java.lang.String implementationClassName) Registers a class by its name as implementation of the given type.

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectFactory

public ObjectFactory()

Creates a new ObjectFactory.

ObjectFactory

public ObjectFactory(int size)

Creates a new ObjectFactory with the given repository size.

Parameters:

size - the size of the repository

ObjectFactory

public ObjectFactory(int size,
             java.lang.Class objectClass)

Creates a new ObjectFactory with the given repository size for registration of implementation of the given class. Required for class name based registration.

Parameters:

size - the size of the repository

objectClass - the class all registered implementations have to implement

Method Detail

create

public java.lang.Object create(java.lang.Class implementation)
                        throws java.lang.InstantiationException,
                               java.lang.IllegalAccessException

Creates a new instance of the given class.

Parameters:

implementation - the implementation class to be instantiated

Throws:

java.lang.InstantiationException - if the object cannot be instantiated

java.lang.IllegalAccessException - if the given class cannot be accessed because it is not in the same package and not public

create

public java.lang.Object create(java.lang.Object type)
                        throws java.lang.InstantiationException

Creates an instance of a class implementing the given type.

Parameters:

type - the type identifying the class to be instantiated

Returns:

the (not initialized) instance of the class identified by the requested type

Throws:

java.lang.InstantiationException - if the instance cannot be created

register

public void register(java.lang.Object type,
            java.lang.Class implementation)

Registers a class as implementation of the given type. The type representing object has to overwrite method int hashCode() from java.lang.Object to be used it with HashMaps.

Parameters:

type - the type identifying the class to be registered

implementation - the implementation class to be registered

register

public void register(java.lang.Object type,
            java.lang.String implementationClassName)

Registers a class by its name as implementation of the given type. The type representing object has to overwrite method int hashCode() from java.lang.Object to be used it with HashMaps.

Parameters:

type - the type identifying the class to be registered

implementationClassName - the full qualified name of the implementation class to be registered