package ejava.examples.orm.rel.annotated;
   
   import java.util.ArrayList;
   import java.util.List;
   
   import javax.persistence.*;
   
   /**
    * This class provides an example of one end of a ManyToMany relationship. 
   * This class will "own" the relationship, thus define the join table.
   */
  @Entity @Table(name="ORMREL_AUTHOR")
  public class Author {
      @Id @GeneratedValue
      private long id;
      private String name;
  
      @ManyToMany
      @JoinTable(name="ORMREL_AUTHOR_MEDIA", //defines the link table
                  //defines the column in the link table for author FK
              joinColumns={@JoinColumn(name="LINK_AUTHOR_ID")},
                  //defines the column in the link table for the media FK
              inverseJoinColumns={@JoinColumn(name="LINK_MEDIA_ID")})
      @OrderBy("title DESC") //order the list returned from database
      private List<Media> media = new ArrayList<Media>();
      
      public Author()        {}
      public Author(long id) { this.id = id; }
      
      public long getId() { return id; }    
      
      public List<Media> getMedia() { return media; }
      public void setMedia(List<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();
      }
  }