AbstractSensor.java

package pl.llp.aircasting.sensor;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import com.google.common.eventbus.EventBus;

import static java.lang.Thread.State;

public abstract class AbstractSensor
{
  protected final ExternalSensorDescriptor descriptor;
  protected final EventBus eventBus;
  protected final BluetoothAdapter adapter;
  protected final BluetoothDevice device;
  private Thread thread;

  public AbstractSensor(ExternalSensorDescriptor descriptor, EventBus eventBus, BluetoothAdapter adapter)
  {
    this.descriptor = descriptor;
    this.eventBus = eventBus;
    this.adapter = adapter;

    if(descriptor == null || eventBus == null || adapter == null)
    {
      throw new NullPointerException("Cannot have nulls!");
    }

    this.device = adapter.getRemoteDevice(descriptor.getAddress());
  }

  public void start()
  {
    if(thread == null)
    {
      thread = new Thread(new Runnable()
      {
        @Override
        public void run()
        {
          BluetoothConnector connector = new BluetoothConnector(adapter, device, eventBus);
          BluetoothSocket socket = getSocket(connector);
          injectSocket(socket);
          if (connector.connect(socket) != null)
          {
            startWorking();
          }
        }
      });
    }
    if(State.NEW.equals(thread.getState()))
    {
      thread.start();
    }
  }

  protected BluetoothSocket getSocket(BluetoothConnector connector)
  {
    return connector.getSocket();
  }

  protected abstract void startWorking();

  protected abstract void injectSocket(BluetoothSocket socket);

  public void stop()
  {
    eventBus.post(new SensorStoppedEvent(descriptor));
    thread = null;
    customStop();
  }

  protected abstract void customStop();
}