espotbasestation.java

无线传感器网络节点Sun SPOT管理工具

/*
 * Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved. 
 * 
 * Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product that is
 * described in this document. In particular, and without limitation, these intellectual property rights may
 * include one or more of the U.S. patents listed at http://www.sun.com/patents and one or more additional patents
 * or pending patent applications in the U.S. and in other countries.
 * 
 * U.S. Government Rights - Commercial software. Government users are subject to the Sun Microsystems, Inc.
 * standard license agreement and applicable provisions of the FAR and its supplements.
 * 
 * Use is subject to license terms. 
 * 
 * This distribution may include materials developed by third parties. Sun, Sun Microsystems, the Sun logo and
 * Java are trademarks or registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. 
 * 
 * Copyright (c) 2006 Sun Microsystems, Inc. Tous droits r?serv?s.
 * 
 * Sun Microsystems, Inc. d?tient les droits de propri?t? intellectuels relatifs ? la technologie incorpor?e dans
 * le produit qui est d?crit dans ce document. En particulier, et ce sans limitation, ces droits de propri?t?
 * intellectuelle peuvent inclure un ou plus des brevets am?ricains list?s ? l'adresse http://www.sun.com/patents
 * et un ou les brevets suppl?mentaires ou les applications de brevet en attente aux Etats - Unis et dans les
 * autres pays.
 * 
 * L'utilisation est soumise aux termes du contrat de licence.
 * 
 * Cette distribution peut comprendre des composants d?velopp?s par des tierces parties.
 * Sun, Sun Microsystems, le logo Sun et Java sont des marques de fabrique ou des marques d?pos?es de Sun
 * Microsystems, Inc. aux Etats-Unis et dans d'autres pays.
 */

package com.sun.spot.spotworld.participants;

import com.sun.spot.spotworld.common.IStateListener;
import com.sun.spot.spotworld.common.LocaleUtil;
import com.sun.spot.spotworld.gui.IUIObject;
import java.lang.reflect.Method;
import java.util.LinkedHashMap;
import java.util.Vector;

/**
 * Proxy for a Basestation.  NOT YET USED.
 *
 * This object listens to the USBSpotChecker's sole instance to receive updates in 
 * its state (like the basestaion being unplugged, etc.)
 *
 * This object has potentially many UI object attempting to depict this basetation.
 * The UI objecys are listeners and are told to noteState() when a change happens. 
 *
 * @author randy
 */

public class ESpotBasestation extends ESpot implements IStateListener {
    
    private String basestationPort;    // A cache, filled during the noteState() callback.
    private boolean firstTime;         // The first time the basestation is told to noteState() this is true, else false
    
    public void init(){
        super.init();
        basestationPort = "";
//        USBSpotChecker.getInstance().addListener(this);
        firstTime = true;
    }
    
    public LinkedHashMap<Method, String> getBasestationMethods() {
        return new LinkedHashMap<Method, String>();
    }    
    
    /*
     * This representative listens to the USPSpotChecker 
     * We only use the first of any basestions. So far there is only one per host anyway.
     */
    public void noteState(Object obj){
        //For now we only expect to be listening to USBSpotCheker singleton.
        if(firstTime){ 
            notifyListeners();
            firstTime = false;
            return;
        }
//        if( !(obj instanceof USBSpotChecker) ) return;  
//        //Update the cache of the basestation port.
//        USBSpotChecker x = (USBSpotChecker) obj; 
//        String[] bases = x.getFoundBasestations();
//        Vector<String> bases = x.getKnownBasestationAddresses();
//        if(bases.length == 0){
//            basestationPort = "";
//        } else {
//            basestationPort = bases[0];
//        }
//        if (bases.size() == 0) basestationPort = "";
//        else basestationPort = bases.firstElement();
        //Tell the UI so it can update. 
        notifyListeners();
        
    }
    
    /*
     * We expect UI objects to be listening to this object.
     */
    public void notifyListeners(){ 
        // Changed the code to use getUIObjectsCopy() rather than
        // getUIIterator. -- Robert
        Vector<IUIObject> uiObjects = getUIObjectsCopy();
        if (uiObjects == null) return;
        for (IUIObject uio : uiObjects)
            uio.noteState(this);
    }

    public String getBasestationPort() {
        return basestationPort;
    }
    
    public boolean isBasestationConnected(){
        return ! basestationPort.equals("");
    }
}