2 Replies Latest reply on Dec 30, 2005 8:28 PM by Emmanuel Bernard

    Inheriting properties from superclass

    Fane Babanu Newbie

      Hello,

      In my model I have a series of classes that extend an abstract class named Resource and I want those classes to have mutually exclusive id's (the id being their primary key) because I want to be able to reference any Resource by unique id. I created a sequence in the database (PostgreSQL 8) named "SEQUENCE_GLOBAL_RESOURCE_ID". I translated this to code like this:

      @EmbeddableSuperclass(access = AccessType.FIELD)
      public abstract class Resource {
      
       @Id(generate = GeneratorType.SEQUENCE, generator = "GENERATOR_SEQUENCE_GLOBAL_RESOURCE_ID")
       @Column(name = "ID")
       private int id;
      
       public int getId() {return id;}
       public void setId(int resourceId) {this.id = resourceId;}
      
      }
      


      Example of entity which extends Resource:

      @Entity(access = AccessType.FIELD)
      @Table(name = "ORGANIZATIONS")
      @SequenceGenerator(name = "GENERATOR_SEQUENCE_GLOBAL_RESOURCE_ID", sequenceName = "SEQUENCE_GLOBAL_RESOURCE_ID")
      public class Organization extends Resource implements Serializable {
      
       @Basic
       @Column(name = "NAME", unique = true, nullable = false)
       private String name;
      
       // and other properties
      }
      


      Now if I retrieve an Organization, the instance I get has all the fields correct (as in the database) except for id which is 0! Does anyone have any idea why this is happening?

      Thanks.