package ejava.examples.orm.rel.annotated;
   
   import java.util.ArrayList;
   import java.util.Collection;
   
   import javax.persistence.*;
   
   /**
    * This class is used as an example of a @OneToMay, using a join table. In
   * this example, the Inventory has a OneToMany relationship with Media. The
   * navigation is uni-directional from Inventory to Media and the MEDIA table
   * has no foreign key to reference the INVENTORY table. An INVENTORY_MEDIA
   * join (or link) table is used to make the linkage.
   */
  @Entity @Table(name="ORMREL_INVENTORY")
  public class Inventory {
      @Id @GeneratedValue
      private long id;
      private String name;
  
      @OneToMany(cascade={CascadeType.ALL})
      //@JoinTable(name="ORMREL_INVENTORY_MEDIA")  //places FK to this and Media in link table
      @JoinColumn(name="INVENTORY_ID")             //places FK to this in Media 
      private Collection<Media> media = new ArrayList<Media>();
      
      public Inventory()        {}
      public Inventory(long id) { this.id = id; }
      
      public long getId() { return id; }
  
      public Collection<Media> getMedia() { return media; }
      public void setMedia(Collection<Media> media) {
          this.media = media;
      }
  
      public String getName() { return name; }
      public void setName(String name) {
          this.name = name;
      }
  
      private String myInstance() {
          String s=super.toString();
          s = s.substring(s.lastIndexOf('.')+1);
          return s;
      }
  
      public String toString() {
          StringBuilder text = new StringBuilder(myInstance());
          text.append(", id=" + id);
          text.append(", name=" + name);
          text.append(", media(" + media.size() + ")={");
          for(Media m: media) {
              text.append(m.getId() + ",");
          }
          text.append("}");
          return text.toString();
      }
  }