ErrorListenerComponent.java

package com.dronecontrol.droneapi.components;

import com.google.common.collect.Sets;
import com.dronecontrol.droneapi.listeners.ErrorListener;

import java.util.Set;

public class ErrorListenerComponent
{
  private final Set<ErrorListener> errorListeners;

  public ErrorListenerComponent()
  {
    errorListeners = Sets.newHashSet();
  }

  public void addErrorListener(ErrorListener errorListener)
  {
    if (!errorListeners.contains(errorListener))
    {
      errorListeners.add(errorListener);
    }
  }

  public void removeErrorListener(ErrorListener errorListener)
  {
    if (errorListeners.contains(errorListener))
    {
      errorListeners.remove(errorListener);
    }
  }

  public void emitError(Throwable e)
  {
    for (ErrorListener listener : errorListeners)
    {
      listener.onError(e);
    }
  }
}