java - map three tables with primary keys and foreign keys Composite in hibernate -

i have map these tables in hibernate , truth have tried in many ways , has not worked me, having if can this, not paste code have because suppose it's not right , changed lot.

table country

idcountry (pk)

countryname

table region

idregion (pk)

idcountry (pk, fk)

regionname

table provinces

idprovinces (pk)

idregion (pk,fk)

provincesname

hopefully can me, thank much

here tables mapping:

@entity @table(name = "country") public class country implements serializable {      @id     @generatedvalue(strategy = generationtype.auto)     @column(name = "idcountry", unique = true, nullable = false)     private int countryid;      @column(name = "countryname", nullable = false)     private string countryname;      @onetomany(mappedby = "regionpk.country", cascade = cascadetype.all)     private set<region> regions = new hashset<region>(0);      // generate getters, setters, hashcode() , equals()  }  @entity @table(name = "region") public class region implements serializable {      @embeddedid     private regionpk regionpk;  //  regionpk contains composite pk      @column(name = "regionname", nullable = false)     private string regionname;      @onetomany(mappedby = "provincepk.region", cascade = cascadetype.all)     private set<province> provinces = new hashset<province>(0);      // generate getters, setters, hashcode() , equals()  }  @embeddable public class regionpk implements serializable {      @generatedvalue(strategy = generationtype.auto)     @column(name = "idregion", unique = true, nullable = false)     private int regionid;      @manytoone     @joincolumn(name = "idcountry", nullable = false)     private country country;      // generate getters, setters, hashcode() , equals()  }  @entity @table(name = "provinces") public class province implements serializable {      @embeddedid     private provincepk provincepk;  //  provincepk contains composite pk      @column(name = "provincename", nullable = false)     private string provincename;      // generate getters, setters, hashcode() , equals()  }  @embeddable public class provincepk implements serializable {      @generatedvalue(strategy = generationtype.auto)     @column(name = "idprovinces", unique = true, nullable = false)     private int provinceid;      @manytoone     @joincolumn(name = "idregion", nullable = false)     private region region;      // generate getters, setters, hashcode() , equals()  }