com.fr.clone.perspectives

类 Perspectives

java.lang.Object

com.fr.clone.perspectives.Perspectives

public class Perspectives
extends java.lang.Object

Perspectives: an object instance of a class behaving differently according to the "view angle".

作者:

kostantinos.kougios 30 Nov 2009

构造器概要

构造器

构造器和说明
Perspectives(Cloner cloner)

方法概要

方法

限定符和类型	方法和说明
<T,E extends T> E	viewAs(java.lang.Class<E> c, T o) Sample: if o is an instance of Product and c is OrderedProduct.class then this returns and instance of OrderedProduct.class which has equal field values to those of the instance of Product.
<I,NI extends I,T extends java.util.Collection<I>,E extends java.util.Collection<NI>> E	viewCollectionAs(E newCollection, java.lang.Class<NI> perspectiveCollectionItemClass, T currentCollection) Sample: if o is a [ Products extends LinkedList ] then the returned instance is a [ OrderedProducts extends LinkedList ].

从类继承的方法 java.lang.Object

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

构造器详细资料

Perspectives

public Perspectives(Cloner cloner)

方法详细资料

viewAs

public <T,E extends T> E viewAs(java.lang.Class<E> c,
                       T o)

Sample: if o is an instance of Product and c is OrderedProduct.class then this returns and instance of OrderedProduct.class which has equal field values to those of the instance of Product. In other words, the returned instance of OrderedProduct.class is the Product instance from the perspective of an OrderedProduct View an object o from the perspective of class c. (view o as an instance of c). c must be instanceof o.getClass()

类型参数:

T - the object

E - this will be the returned type and it must be instanceof T. All properties of o will be copied to this instance.

参数:

c - the class of E. This is used to generate new instances of c

o - the object that must be viewed from a different perspective

返回:

the E perspective of o

viewCollectionAs

public <I,NI extends I,T extends java.util.Collection<I>,E extends java.util.Collection<NI>> E viewCollectionAs(E newCollection,
                                                                                                       java.lang.Class<NI> perspectiveCollectionItemClass,
                                                                                                       T currentCollection)

Sample: if o is a [ Products extends LinkedList ] then the returned instance is a [ OrderedProducts extends LinkedList ]. View a collection o from the perspective of collection E. NOTE: order of the items might not be preserved, depending on the collection type

类型参数:

T - the type of the collection o

I - the type of the elements of the collection o

E - the type of the perspective collection

NI - the type of the perspective's elements

参数:

newCollection - the collection to which the adapted instances should be added

currentCollection - the collection with the instances to be adapted

perspectiveCollectionItemClass - the class of the NI

返回:

E, the collection from a different perspective or null if currentCollection is null