X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;f=org.argeo.api.acr%2Fsrc%2Forg%2Fargeo%2Fapi%2Facr%2Fuuid%2FAbstractUuidFactory.java;h=1ecb64e12ae65044be0fa162656ef3865d8dcbee;hb=8b201d419e0de2f0df848e47dd4b48a2a10c711b;hp=daa186f28957ad7365aa500ca76391bb77353c7b;hpb=840822c55293563f4a09256ca29185fe57f64a37;p=lgpl%2Fargeo-commons.git

diff --git a/org.argeo.api.acr/src/org/argeo/api/acr/uuid/AbstractUuidFactory.java b/org.argeo.api.acr/src/org/argeo/api/acr/uuid/AbstractUuidFactory.java
index daa186f28..1ecb64e12 100644
--- a/org.argeo.api.acr/src/org/argeo/api/acr/uuid/AbstractUuidFactory.java
+++ b/org.argeo.api.acr/src/org/argeo/api/acr/uuid/AbstractUuidFactory.java
@@ -290,6 +290,7 @@ public abstract class AbstractUuidFactory implements UuidFactory {
 	 * make it more readable.
 	 */
 	public static String toBinaryString(UUID uuid, int charsPerSegment, char separator) {
+		Objects.requireNonNull(uuid, "UUID cannot be null");
 		String binaryString = toBinaryString(uuid);
 		StringBuilder sb = new StringBuilder(128 + (128 / charsPerSegment));
 		for (int i = 0; i < binaryString.length(); i++) {
@@ -302,6 +303,7 @@ public abstract class AbstractUuidFactory implements UuidFactory {
 
 	/** Converts an UUID to a binary string (list of 0 and 1). */
 	public static String toBinaryString(UUID uuid) {
+		Objects.requireNonNull(uuid, "UUID cannot be null");
 		String most = zeroTo64Chars(Long.toBinaryString(uuid.getMostSignificantBits()));
 		String least = zeroTo64Chars(Long.toBinaryString(uuid.getLeastSignificantBits()));
 		String binaryString = most + least;
@@ -309,6 +311,16 @@ public abstract class AbstractUuidFactory implements UuidFactory {
 		return binaryString;
 	}
 
+	/**
+	 * Force this node id to be identified as no MAC address.
+	 * 
+	 * @see https://datatracker.ietf.org/doc/html/rfc4122#section-4.5
+	 */
+	public static void forceToNoMacAddress(byte[] nodeId, int offset) {
+		assert nodeId != null && offset < nodeId.length;
+		nodeId[offset] = (byte) (nodeId[offset] | 1);
+	}
+
 	private static String zeroTo64Chars(String str) {
 		assert str.length() <= 64;
 		if (str.length() < 64) {