osd-contiki/tools/cooja/java/se/sics/cooja/RadioMedium.java

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/*
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* Copyright (c) 2008, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
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* $Id: RadioMedium.java,v 1.6 2008/03/18 12:57:04 fros4943 Exp $
*/
package se.sics.cooja;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.*;
import org.jdom.Element;
import se.sics.cooja.interfaces.Radio;
/**
* The abstract class RadioMedium should be implemented by all COOJA radio
* mediums. Radios registered in this medium can both send and receive radio
* data. Depending on the implementation of this interface, more or less
* accurate radio behaviour imitation is aquired.
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*
* Often a radio medium, at initialization, registers one or several dynamic
* plugins. These plugins shows the user some radio medium specific details,
* such as radio transmission radius etc.
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*
* @author Fredrik Osterlind
*/
public abstract class RadioMedium {
/**
* Registers a mote to this medium.
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*
* How radio data will be received from and sent to this mote depends on the
* medium implementation. Common factors may be random, distance from sending
* to receiving mote and interference with other radio transmitters in some
* range.
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*
* @param mote
* Mote to register
* @param sim
* Simulation holding mote
*/
public abstract void registerMote(Mote mote, Simulation sim);
/**
* Unregisters a mote from this medium.
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*
* @param mote
* Mote to unregister
* @param sim
* Simulation holding mote
*/
public abstract void unregisterMote(Mote mote, Simulation sim);
/**
* Register a radio to this radio medium.
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*
* Concerning radio data, this radio will be treated the same way as a mote's
* radio. This method can be used to add non-mote radio devices, such as a
* packet generator or a sniffer.
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*
* @param radio
* Radio
* @param sim
* Simulation holding radio
*/
public abstract void registerRadioInterface(Radio radio, Simulation sim);
/**
* Unregister given radio interface from this medium.
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*
* @param radio
* Radio interface to unregister
* @param sim
* Simulation holding radio
*/
public abstract void unregisterRadioInterface(Radio radio, Simulation sim);
/**
* Adds an observer which is notified after the radio connections has been
* calculated. Often a radio medium is a tick observer and makes these
* calculations after each tick loop. A radio medium observer may then gather
* network data by being notified every time the radio medium has delivered
* data. The radio medium observable MUST notify observers every time the
* getLastTickConnections returns a new value, even if the new value is null.
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*
* @see #getLastTickConnections()
* @see #deleteRadioMediumObserver(Observer)
* @param observer
* New observer
*/
public abstract void addRadioMediumObserver(Observer observer);
/**
* @return Radio medium observable
*/
public abstract Observable getRadioMediumObservable();
/**
* Deletes an radio medium observer.
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*
* @see #addRadioMediumObserver(Observer)
* @param observer
* Observer to delete
*/
public abstract void deleteRadioMediumObserver(Observer observer);
/**
* Returns all connections made during last tick loop.
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*
* Typically a radio medium is a tick observer and transfers data between
* radios after each tick loop. When these calculations are finished, it will
* in turn notify all radio medium observers. A radio medium observer may get
* information about which connections were made by using this method. Observe
* that this method may return null of no connections were made.
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*
* @see RadioConnection
* @return All connections made during last tick loop or null if none
*/
public abstract RadioConnection[] getLastTickConnections();
/**
* Returns XML elements representing the current config of this radio medium.
* This is fetched by the simulator for example when saving a simulation
* configuration file. For example a radio medium may return user altered
* range parameters. This method should however not return state specific
* information such as a current radio status. (All nodes are restarted when
* loading a simulation.)
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*
* @see #setConfigXML(Collection, boolean)
* @return XML elements representing the current radio medium config
*/
public abstract Collection<Element> getConfigXML();
/**
* Sets the current radio medium config depending on the given XML elements.
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*
* @see #getConfigXML()
* @param configXML
* Config XML elements
* @return True if config was set successfully, false otherwise
*/
public abstract boolean setConfigXML(Collection<Element> configXML, boolean visAvailable);
/**
* This method creates an instance of the given class with the given
* simulation constructor argument. Instead of calling the constructors
* directly this method may be used.
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*
* @return Radio medium instance
*/
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public static final RadioMedium generateRadioMedium(
Class<? extends RadioMedium> radioMediumClass, Simulation simulation)
throws NoSuchMethodException, InvocationTargetException,
IllegalAccessException, InstantiationException {
// Generating radio medium
Constructor constr = radioMediumClass
.getConstructor(new Class[] { Simulation.class });
return (RadioMedium) constr.newInstance(new Object[] { simulation });
}
}