15.6.10.3.7. EntityIdentifierStrategy

This identifier strategy generates unique identifiers for entity beans. It concatenates the entity name (or otherwise configured name) with a string representation of the primary key value of the entity. The rules for generating the name section of the identifier are similar to those in ClassIdentifierStrategy. The primary key value (that is, the entity ID) is obtained with the PersistenceProvider component, which can determine the value regardless of the persistence implementation being used in the Seam application. For entities not annotated with @Entity, you must explicitly configure the identifier strategy on the entity class itself, like this:

@Identifier(value = EntityIdentifierStrategy.class) 
public class Customer {...}

Assume we have the following entity class:

@Entity
public class Customer {
  private Integer id;
  private String firstName;
  private String lastName;
  
  @Id 
  public Integer getId() { return id; }
  public void setId(Integer id) { this.id = id; }
  
  public String getFirstName() { return firstName; }
  public void setFirstName(String firstName) { 
    this.firstName = firstName; 
  }
  
  public String getLastName() { return lastName; }
  public void setLastName(String lastName) { this.lastName = lastName; }
}

For a Customer instance with an id value of 1, the value of the identifier would be Customer:1. If the entity class is annotated with an explicit identifier name, like so:

@Entity @Identifier(name = "cust") 
public class Customer {...}

Then a Customer with an id value of 123 would have an identifier value of "cust:123".