NetworkTopology.java

package fr.imag.adele.apam.distriman.discovery;

import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import javax.jmdns.NetworkTopologyDiscovery;

/**
 * Factory that determines the euristics to choose/filter the network cards to
 * be considered
 * 
 * @author jnascimento
 * 
 */
public class NetworkTopology implements NetworkTopologyDiscovery {

    @Override
    public InetAddress[] getInetAddresses() {

	List<InetAddress> addresses = new ArrayList<InetAddress>();

	try {
	    for (NetworkInterface ni : Collections.list(NetworkInterface
		    .getNetworkInterfaces())) {

		for (InetAddress inetAddress : Collections.list(ni
			.getInetAddresses())) {
		    if (!this.useInetAddress(ni, inetAddress)) {
			continue;
		    }
		    addresses.add(inetAddress);
		}
	    }

	    return addresses.toArray(new InetAddress[0]);

	} catch (SocketException e) {
	    e.printStackTrace();
	}

	return null;

    }

    @Override
    public void lockInetAddress(InetAddress arg0) {

    }

    @Override
    public void unlockInetAddress(InetAddress arg0) {

    }

    @Override
    public boolean useInetAddress(NetworkInterface networkInterface,
	    InetAddress interfaceAddress) {

	if (interfaceAddress instanceof Inet6Address
	// TODO in the future hide localhost ||
	// !interfaceAddress.isLoopbackAddress()
	) {
	    return false;
	}

	return true;
    }

}