introduced duplicatable V2XMessage functionality (#390)

* introduced duplicatable V2XMessage functionality

lib/mosaic-objects/src/main/java/org/eclipse/mosaic/lib/objects/v2x/DuplicatableMessage.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2024 Fraunhofer FOKUS and others. All rights reserved.
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contact: [email protected]
+ */
+
+package org.eclipse.mosaic.lib.objects.v2x;
+
+/**
+ * A message that can duplicate itself.
+ * @param <T> a class that extends {@link V2xMessage}
+ */
+public interface DuplicatableMessage<T extends V2xMessage> {
+
+    /**
+     * Creates a copy of the V2xMessage.
+     * The message gets a new ID and routing (to use current vehicle position).
+     * Only its contents (e.g. payload, type, ...) are copied.
+     *
+     * @param routing contains current vehicle position
+     * @return cloned message
+     */
+    T duplicate(MessageRouting routing);
+}

lib/mosaic-objects/src/main/java/org/eclipse/mosaic/lib/objects/v2x/GenericV2xMessage.java

@@ -23,7 +23,7 @@
 /**
  * This {@link V2xMessage} implementation can be used for simple message exchange between entities.
  */
-public final class GenericV2xMessage extends V2xMessage {
+public final class GenericV2xMessage extends V2xMessage implements DuplicatableMessage<GenericV2xMessage> {
 
     private static final long serialVersionUID = 1L;
 
@@ -82,4 +82,9 @@ public String toString() {
                 + ", encodedPayload=" + payload + '}';
     }
 
+    @Override
+    public GenericV2xMessage duplicate(MessageRouting routing) {
+        return new GenericV2xMessage(routing, messageType, payload.getEffectiveLength());
+    }
+
 }