java - cascade not working while saving the data -

i have 1 one mapping relationship.

user.java

public class user {      @id     @sequencegenerator(name = "userid", sequencename = "userid")     @generatedvalue(strategy = generationtype.auto, generator = "userid")     @column(name = "id")     private long id;      private string firstname;     private string lastname;      @column(unique = true)     private string username;     private string password;      @onetoone(mappedby = "user", cascade = cascadetype.all, fetch = fetchtype.lazy)     @joincolumn(name = "id")     private role role;      public long getid() {         return id;     }      public void setid(long 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;     }      public string getusername() {         return username;     }      public void setusername(string username) {         this.username = username;     }      public string getpassword() {         return password;     }      public void setpassword(string password) {         this.password = password;     }      public role getrole() {         return role;     }      public void setrole(role role) {         this.role = role;     }      @override     public string tostring() {         return "user [id=" + id + ", firstname=" + firstname + ", lastname="                 + lastname + ", username=" + username + ", password="                 + password + ", role=" + role + "]";     }  } 

roles.java

public class role {      @id     @sequencegenerator(name = "userid", sequencename = "userid")     @generatedvalue(strategy = generationtype.auto, generator = "userid")     @column(name = "roleid")     private long roleid;      @onetoone     private user user;     private integer role;      public long getid() {         return roleid;     }      public void setid(long id) {         this.roleid = id;     }      public user getuser() {         return user;     }      public void setuser(user user) {         this.user = user;     }      public integer getrole() {         return role;     }      public void setrole(integer role) {         this.role = role;     } } 

i tring save data

public long create(user user) {     long userid = super.save(user);     return userid; } 

when try save user entity seeing data saved below.

user table:

    id   firstname lastname   usrename   password       1    hello     hello      hello     hello 

role table:

    roleid      role     user_id       1          1         null 

can tell me user table not getting related each other.

i need user_id 1 instead of null.

here id of user table not getting mapped user_id of table role.

• the role owner of association, user's @onetoone role doesn't need @joincolumn @ all:

  @id @sequencegenerator(name = "userid", sequencename = "userid") @generatedvalue(strategy = generationtype.auto, generator = "userid") @column(name = "id") private long id;  @onetoone(mappedby = "user", cascade = cascadetype.all, fetch = fetchtype.lazy) private role role; 

• when saving user need set both side of association:

  user.setrole(role); role.setuser(user); userdao.create(user);