package net.avcompris.commons3.triggered.impl;
   
   import static com.google.common.base.Preconditions.checkNotNull;
   import static com.google.common.base.Preconditions.checkState;
   
   import javax.annotation.Nullable;
   
   import net.avcompris.commons3.triggered.ErrorTriggered;
   import net.avcompris.commons3.triggered.ErrorTriggeredAction;
  
  public abstract class AbstractErrorTriggeredImpl implements ErrorTriggered {
  
  	private ErrorTriggeredAction action;
  
  	@Override
  	public final void register(final ErrorTriggeredAction action) {
  
  		checkNotNull(action, "action");
  
  		checkState(this.action == null, "Action already registered");
  
  		this.action = action;
  	}
  
  	@Nullable
  	protected final ErrorTriggeredAction getAction() {
  
  		return action;
  	}
  }