uk.ac.cam.acr31.life.hash

Class NodeFactory

java.lang.Object

uk.ac.cam.acr31.life.hash.NodeFactory

 class NodeFactory
extends java.lang.Object

Factory and cache for creating Nodes. This class contains the only instantiable implementation of the Node interface with private constructors. This means we control the creation of Nodes. When creating a node we check whether we have a cached instance which we store in a WeakHashMap so when the garbage collector runs it will collect unreferenced Nodes (from previous generations).

Author:

acr31

Constructor Summary

Constructors

Constructor and Description
NodeFactory()

Method Summary

Methods

Modifier and Type	Method and Description
(package private) static Node	getInstance(int level, int population) Create (or return a previously created) Node with the given level and population
(package private) static Node	getInstance(Node tl, Node tr, Node bl, Node br) Create (or return a previously created) Node with the given child nodes

Methods inherited from class java.lang.Object

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

Constructor Detail

NodeFactory

NodeFactory()

Method Detail

getInstance

static Node getInstance(Node tl,
               Node tr,
               Node bl,
               Node br)

Create (or return a previously created) Node with the given child nodes

getInstance

static Node getInstance(int level,
               int population)

Create (or return a previously created) Node with the given level and population