Added ConfigurationException

Author: pavly-gerges

src/main/java/ConfigurationException.java

@@ -0,0 +1,11 @@
+public class ConfigurationException extends RuntimeException{
+    private final String message;
+    public ConfigurationException(String message){
+        this.message=message;
+    }
+
+    @Override
+    public void printStackTrace() {
+        System.err.println(message);
+    }
+}

src/main/java/JoystickModule.java

@@ -164,15 +164,16 @@ public void startCollectingChannelsData(){
         if(gpioController==null || mcp3008GpioProvider==null){
             throw new ModuleNotActiveException("Module not active or not initialized");
         }
-
+        if(getVxPin()==null || getVyPin()==null){
+            throw new ConfigurationException("Please Register MCP3008 input Channels w/ the JoyStick module Vx & Vy");
+        }
         GpioPinAnalogInput[] gpioPinAnalogInput= new GpioPinAnalogInput[inputChannels.size()];
         /*a way of making the var of the number a final value to be used anonymously & to change it at the same time*/
         final int[] position = {0};
         inputChannels.forEach(channel->{
             gpioPinAnalogInput[position[0]]= channel;
             position[0] +=1;
         });
-
         gpioController.addListener((GpioPinListenerAnalog) event -> {
             double valueX=mcp3008GpioProvider.getValue(getVxPin());
             double valueY=mcp3008GpioProvider.getValue(getVyPin());