Package net.obvj.confectory.util

Enum ObjectFactory

java.lang.Object

java.lang.Enum<ObjectFactory>

net.obvj.confectory.util.ObjectFactory

All Implemented Interfaces:

Serializable, Comparable<ObjectFactory>

public enum ObjectFactory
extends Enum<ObjectFactory>

A factory that encapsulates the logic to reflectively produce new objects depending on the desired strategy.

Since:

2.5.0

Author:

oswaldo.bapvic.jr (Oswaldo Junior)

Enum Constant Summary

Enum Constants

Enum Constant	Description
CONSTRUCTOR_BASED	Constructor-based object factory.
FAST	A factory that builds objects by allocating an instance directly on the heap, without any constructor being called.
OBJENESIS	Alternative object factory that uses a variety of approaches to attempt to instantiate the object, depending on the type of object, JVM version, JVM vendor and Security Manager present.

Method Summary

Modifier and Type	Method	Description
abstract <T> T	newObject(Class<T> type)	Creates a new instance of the specified class.
static ObjectFactory	valueOf(String name)	Returns the enum constant of this type with the specified name.
static ObjectFactory[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

CONSTRUCTOR_BASED

public static final ObjectFactory CONSTRUCTOR_BASED

Constructor-based object factory.

It's safer but it requires the existence of a default (public and no-arguments) constructor in the class to allow the instantiation.

FAST

public static final ObjectFactory FAST

A factory that builds objects by allocating an instance directly on the heap, without any constructor being called.

Final fields are assigned with default values as specified by Java^TM Tutorials > Language Basics > Variables > Primitive Data Types, i.e., zero for numeric types, false for boolean, and null for String (or any object type).

Note: This is the default strategy since 2.5.0.

OBJENESIS

public static final ObjectFactory OBJENESIS

Alternative object factory that uses a variety of approaches to attempt to instantiate the object, depending on the type of object, JVM version, JVM vendor and Security Manager present.

IMPORTANT: This strategy requires the optional dependency org.objenesis:objenesis in the class path.

Method Detail

values

public static ObjectFactory[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (ObjectFactory c : ObjectFactory.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static ObjectFactory valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

newObject

public abstract <T> T newObject(Class<T> type)
                         throws ReflectiveOperationException

Creates a new instance of the specified class.

Type Parameters:

T - the target type

Parameters:

type - the target type

Returns:

a new instance of the specified class

Throws:

ReflectiveOperationException - in case of failure during the instantiation