X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;f=org.argeo.api.uuid%2Fsrc%2Forg%2Fargeo%2Fapi%2Fuuid%2FMacAddressUuidFactory.java;h=ab6d55d207ae9576dfd92dc32b5c90a660b17bc2;hb=73ff3654ba6d4a8381b9be5594d0d56f214fac58;hp=d1ce6ded851ded57825c20be3158498f32281f3e;hpb=e846ef84146b66ae543c29c5f17b2991ff0f5973;p=lgpl%2Fargeo-commons.git

diff --git a/org.argeo.api.uuid/src/org/argeo/api/uuid/MacAddressUuidFactory.java b/org.argeo.api.uuid/src/org/argeo/api/uuid/MacAddressUuidFactory.java
index d1ce6ded8..ab6d55d20 100644
--- a/org.argeo.api.uuid/src/org/argeo/api/uuid/MacAddressUuidFactory.java
+++ b/org.argeo.api.uuid/src/org/argeo/api/uuid/MacAddressUuidFactory.java
@@ -1,15 +1,71 @@
 package org.argeo.api.uuid;
 
+import java.net.InetAddress;
+import java.net.NetworkInterface;
+import java.net.SocketException;
+import java.net.UnknownHostException;
+import java.util.Enumeration;
+import java.util.UUID;
+
+/**
+ * An {@link UUID} factory whose node id (for time based UUIDs) is the hardware
+ * MAC address as specified in RFC4122.
+ * 
+ * @see https://datatracker.ietf.org/doc/html/rfc4122.html#section-4.1.6
+ */
 public class MacAddressUuidFactory extends ConcurrentUuidFactory {
 	public final static UuidFactory DEFAULT = new MacAddressUuidFactory();
 
 	public MacAddressUuidFactory() {
-		setNodeIdSupplier(() -> {
-			byte[] hardwareAddress = getHardwareAddress();
-			byte[] macAddressNodeId = toNodeIdBytes(hardwareAddress, 0);
-			long nodeIdBase = NodeIdSupplier.toNodeIdBase(macAddressNodeId);
-			return nodeIdBase;
-		});
+		this(0, localHardwareAddressAsNodeId());
+	}
+
+	public MacAddressUuidFactory(long initialClockRange) {
+		this(initialClockRange, localHardwareAddressAsNodeId());
+	}
+
+	public MacAddressUuidFactory(byte[] hardwareAddress) {
+		this(0, hardwareAddress);
+	}
+
+	public MacAddressUuidFactory(long initialClockRange, byte[] hardwareAddress) {
+		super(initialClockRange, hardwareAddress);
+	}
+
+	private static byte[] localHardwareAddressAsNodeId() {
+		InetAddress localHost;
+		try {
+			localHost = InetAddress.getLocalHost();
+			NetworkInterface nic = NetworkInterface.getByInetAddress(localHost);
+			if (nic != null)
+				return hardwareAddressToNodeId(nic);
+			Enumeration<NetworkInterface> netInterfaces = null;
+			try {
+				netInterfaces = NetworkInterface.getNetworkInterfaces();
+			} catch (SocketException e) {
+				throw new IllegalStateException(e);
+			}
+			if (netInterfaces == null || !netInterfaces.hasMoreElements())
+				throw new IllegalStateException("No interfaces");
+			return hardwareAddressToNodeId(netInterfaces.nextElement());
+		} catch (UnknownHostException | SocketException e) {
+			throw new IllegalStateException(e);
+		}
+
+	}
+
+	public static byte[] hardwareAddressToNodeId(NetworkInterface nic) {
+		try {
+			byte[] hardwareAddress = nic.getHardwareAddress();
+			final int length = 6;
+			byte[] arr = new byte[length];
+			for (int i = 0; i < length; i++) {
+				arr[i] = hardwareAddress[length - 1 - i];
+			}
+			return arr;
+		} catch (SocketException e) {
+			throw new IllegalStateException("Cannot retrieve hardware address from NIC", e);
+		}
 	}
 
 }