/**
* Copyright (c) 2013, Institute of Information Systems (Sven Groppe and contributors of LUPOSDATE), University of Luebeck
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice, this list of conditions and the following
* disclaimer.
* - 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.
* - Neither the name of the University of Luebeck 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
*/
package lupos.event.producer;
import java.util.ArrayList;
import java.util.List;
import javax.bluetooth.*;
import lupos.datastructures.items.Triple;
import lupos.datastructures.items.literal.Literal;
import lupos.datastructures.items.literal.LiteralFactory;
import lupos.event.communication.SerializingMessageService;
import lupos.event.util.Literals;
/**
* Searches for bluetooth devices in range and builds events for it.
*/
public class BTDevicesProducer extends ProducerBaseNoDuplicates {
public final static String NAMESPACE = "http://localhost/events/BTDevices/";
private final Literal TYPE = Literals.createURI(NAMESPACE, "BTDevicesEvent");
private final Literal PREDICATE = Literals.createURI(NAMESPACE, "inRange");
public BTDevicesProducer(SerializingMessageService msgService) {
super(msgService, 15000);
}
@Override
public List<List<Triple>> produceWithDuplicates() {
if (!LocalDevice.isPowerOn()) {
System.out.println("Local bluetooth device is powered off");
return null;
}
try {
LocalDevice localDevice = LocalDevice.getLocalDevice();
System.out.println("Initializing local bluetooth device ...");
DiscoveryAgent agent = localDevice.getDiscoveryAgent();
final Object inquiryCompletedEvent = new Object();
final List<BluetoothDevice> devices = new ArrayList<BluetoothDevice>();
// this is the call back for the bluetooth driver
DiscoveryListener listener = new DiscoveryListener() {
@Override
public void deviceDiscovered(RemoteDevice rd, DeviceClass dc) {
devices.add(new BluetoothDevice(rd.getBluetoothAddress(), rd.isTrustedDevice()));
System.out.println("Device discovered: " + rd.getBluetoothAddress());
}
@Override
public void inquiryCompleted(int discType) {
synchronized (inquiryCompletedEvent) {
// tell the main thread that we are done
System.out.println("inquiryCompleted");
inquiryCompletedEvent.notifyAll();
}
}
@Override
public void serviceSearchCompleted(int transID, int respCode) {
// just ignore
}
@Override
public void servicesDiscovered(int transID, ServiceRecord[] servRecord) {
// just ignore
}
};
synchronized (inquiryCompletedEvent) {
try {
System.out.println("Launching bluetooth device discovery...");
boolean started = agent.startInquiry(DiscoveryAgent.GIAC, listener);
if (started) {
inquiryCompletedEvent.wait();
}
} catch (BluetoothStateException e) {
System.err.println("Error while starting the bluetooth agent");
System.err.println(e);
e.printStackTrace();
}
}
List<Triple> triples = new ArrayList<Triple>();
triples.add(new Triple(Literals.AnonymousLiteral.ANONYMOUS, Literals.RDF.TYPE, this.TYPE));
for(BluetoothDevice bd : devices) {
Literal obj = LiteralFactory.createTypedLiteral("\"" + (bd.address) + "\"", Literals.XSD.String);
triples.add(new Triple(Literals.AnonymousLiteral.ANONYMOUS, this.PREDICATE, obj));
// System.out.println("A:" + new Triple(Literals.AnonymousLiteral.ANONYMOUS, this.PREDICATE, obj));
}
return ProducerBase.fold(triples);
} catch (Exception ex) {
System.err.println(ex);
ex.printStackTrace();
return null;
}
}
public static void main(String[] args) throws Exception {
// create communication channel
SerializingMessageService msgService = ProducerBase.connectToMaster();
// start producer
new BTDevicesProducer(msgService).start();
}
public class BluetoothDevice {
private String address;
private boolean paired;
/**
* Default constructor which directly initializes the fields
*
* @param address the address of the bluetooth device, e.g. "ED3B6CE568D9"
* @param paired true, if the device has been paired with the host and is therefore trusted
*/
public BluetoothDevice(String address, boolean paired) {
this.address = address;
this.paired = paired;
}
/**
* @return the address of the bluetooth device
*/
public String getAddress() {
return this.address;
}
/**
* @return true, if the device has been paired with the host and is therefore trusted
*/
public boolean isPaired() {
return this.paired;
}
@Override
public String toString() {
return this.address + (this.paired ? "!" : "?");
}
}
}