content: package com.iluwatar.layers;
  
  import java.util.HashSet;
  import java.util.Set;
  
  import javax.persistence.CascadeType;
  import javax.persistence.Entity;
  import javax.persistence.FetchType;
  import javax.persistence.GeneratedValue;
  import javax.persistence.Id;
  import javax.persistence.OneToMany;
  import javax.persistence.OneToOne;
  
  /**
   * 
   * Cake entity
   *
   */
  @Entity
  public class Cake {
  
  	@Id
  	@GeneratedValue
  	private Long id;
  
  	@OneToOne(cascade=CascadeType.REMOVE)
  	private CakeTopping topping;
  	
  	@OneToMany(cascade=CascadeType.REMOVE, fetch=FetchType.EAGER)
  	private Set<CakeLayer> layers;
  	
  	public Cake() {		
  		setLayers(new HashSet<>());
  	}
  
  	public Long getId() {
  		return id;
  	}
  
  	public void setId(Long id) {
  		this.id = id;
  	}
  
  	public CakeTopping getTopping() {
  		return topping;
  	}
  
  	public void setTopping(CakeTopping topping) {
  		this.topping = topping;
  	}
  
  	public Set<CakeLayer> getLayers() {
  		return layers;
  	}
  
  	public void setLayers(Set<CakeLayer> layers) {
  		this.layers = layers;
  	}
  	
  	public void addLayer(CakeLayer layer) {
  		this.layers.add(layer);
  	}
  	
  	@Override
  	public String toString() {
  		return String.format("id=%s topping=%s layers=%s", id, topping, layers.toString());
  	}	
  }
  