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/*
* Javolution - Java(TM) Solution for Real-Time and Embedded Systems
* Copyright (C) 2005 - Javolution (http://javolution.org/)
* All rights reserved.
*
* Permission to use, copy, modify, and distribute this software is
* freely granted, provided that this notice is preserved.
*/
package javolution.lang;
/**
* <p> This interface identifies classes whose instances are not subject or
* susceptible to change or variation after creation. Once a class is
* declared immutable, any subclass must ensure immutability as well.</p>
*
* <p> {@link Immutable} objects can safely be used in a multi-threaded
* environment and <b>do not require defensive copying</b>.
* For example:[code]
* class Polygon implements Immutable {
* private List<Point2D> _vertices;
* public Polygon(List<Point2D> vertices) {
* _vertices = (vertices instanceof Immutable) ?
* vertices : // Safe, the vertices cannot be modified by the client.
* new FastTable<Point2D>(vertices); // Defensive copying required.
* }
* }[/code]</p>
* @see <a href="http://en.wikipedia.org/wiki/Immutable_object">
* Wikipedia: Immutable Object<a>
*
* @author <a href="mailto:jean-marie@dautelle.com">Jean-Marie Dautelle</a>
* @version 3.7, February 6, 2006
*/
public interface Immutable {
// No method (tagging interface).
}
Version data entries
119 entries across 119 versions & 1 rubygems