java - Strange issue while configuring ID types for Embeddable class in EclipseLink-2.5.2 -

in current implementation have separate entity classes each db table. using jpa along eclipselink-2.5.2. working fine me @ point when data huge, lags. that's why decided start using @embedded, @embeddable , @embeddedid. while doing getting error strange me. here full stacktrace posted: https://gist.githubusercontent.com/tjdudhatra/b955812e0d1a71cf97f1/raw/11ea458869e24baae744530417ac99bc877ed514/gistfile1.txt

being specific, let me give exact scenario in case getting exception. consider code block has 3 class. 1 annotated @entity , other twos annotated @embeddable. know in 1 class cannot define @id , @embeddedid , have not done that, while deploying server, getting exception says that:

[class org.apache.{someclass}] has both @embdeddedid (on attribute [id]) , @id (on attribute []. both id types cannot specified on same entity.

@entity @table(name="user")   public class user {    @id   public long id;    @column(name="usercode")   public string usercode;    @elementcollection   @collectiontable(name = "address", joincolumns = @joincolumn(name = "user_id"))   public list<address> addresslist;    .... }  @embeddable   public class address {    @embeddedid   @column(name = "id")   public long id;    @column(name="userid")   public long userid;    @column(name="address-line-1")   public string addressline1;    @column(name="address-line-2")   public string addressline2;    @elementcollection   @collectiontable(name = "phone", joincolumns = @joincolumn(name = "user_id"))   protected list<phone> phonelist;    .... }  @embeddable  public class phone {    @embeddedid   @column(name = "id")   public long id;    @column(name="contact_no")   public string contactno;    @column(name="country_code")   public int countrycode;    @column(name="address_id")   public int addressid;    .... } 

please let me know if more details required , kind of much appreciated.

thanks,

a class annotated @embeddable must not contain @embeddedid.

@embeddedid annotate field of type @embeddable class in class , mark primary key.

example :

@entity public class project {     @embeddedid projectid id;     ... }  @embeddable class projectid {     int departmentid;     long projectid;     ... } 

edit : in case, don't think want phone, nor address @embeddable. mark them regular @entity.