java - Criteria Query 2, query through 3 entities level -

i learning criteria api, encounter issue create query. here structure :

an admin has list of groups, group has list of admins (so manytomany relationship)

a group has list of companies, company has 1 group (so onetomany)

to find groups of admin created request :

@override public list<group> getallgroupsmanagedbyadmin(admin admin) {  final criteriabuilder cb = entitymanager.getcriteriabuilder();  final criteriaquery<group> query = cb.createquery(group.class);  final root<admin> admins = query.from(admin.class);   query.where(cb.equal(admins.get(admin_.id), admin.getid()))  .select(admins.join(admin_.groups));   return this.entitymanager.createquery(query).getresultlist(); } 

now i'm trying find companies of 1 group sure group managed admin provided in parameter, method definition :

public list<company> getcompaniesbygroupidmanagedbyadmin(string groupid, admin admin) 

but drafts failed @ moment. give me ? thank !

finally find myself, solution easier expected :

public list<company> getcompaniesbygroupidmanagedbyadmin(string groupid, admin admin) {     final criteriabuilder cb = entitymanager.getcriteriabuilder();     final criteriaquery<company> query = cb.createquery(company.class);     final root<admin> admins = query.from(admin.class);      final join<admin, group> groups = admins.join(admin_.groups);      final predicate[] predicates = new predicate[2];      predicates[0] = cb.equal(admins.get(admin_.id), admin.getid());     predicates[1] = cb.equal(groups.get(group_.id), groupid);      query.where(predicates)     .select(groups.join(group_.companies));      return this.entitymanager.createquery(query).getresultlist(); }