Create timesync JNI for testing client (#1433)

photon-targeting/src/main/java/org/photonvision/jni/TimeSyncServer.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) Photon Vision.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package org.photonvision.jni;
+
+public class TimeSyncServer {
+    private long handle;
+
+    public TimeSyncServer(int port) {
+        this.handle = TimeSyncServer.create(port);
+    }
+
+    public void start() {
+        TimeSyncServer.start(handle);
+    }
+
+    public void stop() {
+        if (handle > 0) {
+            TimeSyncServer.stop(handle);
+            handle = 0;
+        }
+    }
+
+    private static native long create(int port);
+
+    private static native void start(long handle);
+
+    private static native void stop(long handle);
+}