com.thoughtworks.proxy.toys.nullobject
Class Null

java.lang.Object
  com.thoughtworks.proxy.toys.nullobject.Null

public class Null
extends Object

Toy factory to create proxies acting as Null Objects.

Since:

0.1

Author:

Dan North, Aslak Hellesøy

See Also:

com.thoughtworks.proxy.toys.nullobject

Field Summary

static Object	NULL_OBJECT The Null Object.
static SortedMap	NULL_SORTED_MAP Immutable Null Object implementation of SortedMap
static SortedSet	NULL_SORTED_SET Immutable Null Object implementation of SortedSet

Method Summary

static boolean	isNullObject(Object object) Determine whether an object was created by object(Class).
static boolean	isNullObject(Object object, ProxyFactory proxyFactory) Determine whether an object was created by object(Class, ProxyFactory).
static Object	object(Class type) Generate a Null Object proxy for a specific type using the StandardProxyFactory.
static Object	object(Class type, ProxyFactory proxyFactory) Generate a Null Object proxy for a specific type.

Methods inherited from class java.lang.Object

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

Field Detail

NULL_OBJECT

public static final Object NULL_OBJECT

The Null Object.

NULL_SORTED_MAP

public static final SortedMap NULL_SORTED_MAP

Immutable Null Object implementation of SortedMap

NULL_SORTED_SET

public static final SortedSet NULL_SORTED_SET

Immutable Null Object implementation of SortedSet

Method Detail

object

public static Object object(Class type,
                            ProxyFactory proxyFactory)

Generate a Null Object proxy for a specific type.

Note that the method will only return a proxy if it cannot handle the type itself or null if the type cannot be proxied.

Parameters:

type - the type implemented by the proxy

proxyFactory - the ProxyFactory in use

Returns:

object, proxy or null

Since:

0.1

See Also:

com.thoughtworks.proxy.toys.nullobject

object

public static Object object(Class type)

Generate a Null Object proxy for a specific type using the StandardProxyFactory.

Note that the method will only return a proxy if it cannot handle the type itself or null if the type cannot be proxied.

Parameters:

type - the type implemented by the proxy

Returns:

object, proxy or null

Since:

0.1

See Also:

com.thoughtworks.proxy.toys.nullobject

isNullObject

public static boolean isNullObject(Object object)

Determine whether an object was created by object(Class).

Parameters:

object - the object to examine

Returns:

true if the object is a Null proxy.

Since:

0.1

isNullObject

public static boolean isNullObject(Object object,
                                   ProxyFactory proxyFactory)

Determine whether an object was created by object(Class, ProxyFactory).

Parameters:

object - the object to examine

proxyFactory - the ProxyFactory to use

Returns:

true if the object is a Null proxy.

Since:

0.1