From 04e3b6b17132028b2d3d197bd0341e20fcc476b3 Mon Sep 17 00:00:00 2001
From: LongHairedHacker <sebastian@sebastians-site.de>
Date: Mon, 19 Dec 2016 11:55:22 +0100
Subject: [PATCH] SSS7 should be a signleton

---
 software/jna/SSS7.java     | 14 +++++++++++---
 software/jna/SSS7Test.java |  4 ++--
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/software/jna/SSS7.java b/software/jna/SSS7.java
index 7d1a4b7..b9a4f32 100644
--- a/software/jna/SSS7.java
+++ b/software/jna/SSS7.java
@@ -4,6 +4,15 @@ import com.sun.jna.Pointer;
 import com.sun.jna.Memory;
 
 public class SSS7 {
+	private static SSS7 instance = null;
+
+	public static SSS7 getInstance() {
+		if(instance == null) {
+			instance = new SSS7();
+		}
+		return instance;
+	}
+
 	private interface NativeSSS7 extends Library {
 		public int libsss7_start(String serialport);
 		public int libsss7_can_send();
@@ -19,12 +28,11 @@ public class SSS7 {
 	private NativeSSS7 lib;
 	private String serial;
 
-	SSS7(String serial) {
+	protected SSS7() {
 		this.lib = (NativeSSS7) Native.loadLibrary("libsss7.so", NativeSSS7.class);
-		this.serial = serial;
 	}
 
-	public boolean start() {
+	public boolean start(String serial) {
 		return this.lib.libsss7_start(this.serial) == 0;
 	}
 
diff --git a/software/jna/SSS7Test.java b/software/jna/SSS7Test.java
index 7db06a1..406c800 100644
--- a/software/jna/SSS7Test.java
+++ b/software/jna/SSS7Test.java
@@ -5,9 +5,9 @@ public class SSS7Test {
 
 
 	public static void main(String[] args) {
-		SSS7 bus = new SSS7("/dev/ttyUSB0");
+		SSS7 bus = SSS7.getInstance();
 
-		bus.start();
+		bus.start("/dev/ttyUSB0");
 
 		while(!bus.canSend());
 		bus.send("Hallo Java".getBytes());