47 lines
1.4 KiB
Java
47 lines
1.4 KiB
Java
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/*
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File: PositionObserver.java
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University of Applied Science Berne,HTA-Biel/Bienne,
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Computer Science Department.
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Diploma thesis J3D Solar System Simulator
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Originally written by Marcel Portner & Bernhard Hari (c) 2000
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CVS - Information :
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$Header: /var/cvsreps/projects/c450/2000/sss3d/source_diploma/sss3d/utils/observer/PositionObserver.java,v 1.2 2000/12/13 13:42:04 portm Exp $
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$Author: portm $
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$Date: 2000/12/13 13:42:04 $
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$State: Exp $
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*/
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package sss3d.utils.observer;
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/**
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* The interface PositionObserver is part of the position observer - defined
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* by the observer pattern.
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* References : E.Gamma; Design Patterns ISBN 0-201-63361-2, Addison Wesley, 1995<br>
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* It defines an updating interface for objects that should be notified of changes
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* in a OrbitPositions.
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* @author Marcel Portner & Bernhard Hari
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* @version $Revision: 1.2 $
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* @see OrbitPositions
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* @see ObjectsPositions
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*/
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public interface PositionObserver {
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/**
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* The update methode is used to keep the state of the concrete observer
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* consistent with the state of the OrbitPositions.<br>
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*
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* @param orbitPos a reference to the OrbitPositions
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*/
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void update(OrbitPositions orbitPos);
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/**
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* Returns the id of the concrete observer.
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*
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* @return String the id of the concrete observer
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*/
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String getId();
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}
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