database - how to add other columns to the joinTable in a Many To Many relationship in hibernate JPA? -

i have 2 entities user , file . file can shared many users , user can receive many files . it's many many relationship between 2 entities .

in user class :

 @manytomany         @jointable(name = "receiver_shared",                 joincolumns = @joincolumn(name =  "user_id",                                 insertable =false, updatable = false),                 inversejoincolumns = @joincolumn(name ="file_id",                                         insertable = false, updatable = false))          private list<file> receivedfiles; 

in file class :

  @manytomany(mappedby = "receivedfiles")         private list<user> receivers; 

my problem want save sharetime , assign permissions when file shared user . mean file 1 can shared user 1 permissions read , write , it's shared user 2 permission read .

i'm new jpa . thinking receiver_shared table must contain permission column , sharetime column .

how ?

update :

as jb nizet suggested i've created new share entity .

i've added file class

@onetomany (mappedby = "sharedfile",fetch=fetchtype.lazy)     private list<share> shares = new arraylist<share>(); 

i've added user class

@onetomany (mappedby = "receiver",fetch=fetchtype.lazy)     private list<share> receivedfiles = new arraylist<share>(); 

in share class have added column sharetime , column permission , :

@manytoone(fetch=fetchtype.eager)     @joincolumn(name = "receiver_id")     private user receiver;  @manytoone(fetch=fetchtype.eager)     @joincolumn(name = "file_id")     private file sharedfile; 

i tested configuration junit

user receiver=userrepository.findone((long)2); file toshare=filerepository.findone((long)2); share s=new share(toshare,receiver,1,new timestamp(newdate().gettime())); sharerepository.save(s); 

if join table contains additional functional information, it's not join table anymore, , must mapped entity.

so you'll have one-to-many between user , share, , one-to-many between file , share.