CODEWITHSUNDEEP
hibernate
Glide
Glide

Reputation: 21245

Hibernate criteria to return result in a map

I have a user table, how do I create a Criteria in Hibernate that returns a Map with the UserId as the key and the User object as the value?

Upvotes: 2

Views: 4713

Answers (3)

Prashant K
Prashant K

Reputation: 909

You can use HQL , which has new map to return the required data in the form of map. If you can use this, then I am happy to share further details on how to do this.

Upvotes: 0

Yoztastic
Yoztastic

Reputation: 862

Using Google guava 

ImmutableMap<Long, User> immutableMap = Maps.<Long, User>uniqueIndex(hibernateSession.createCriteria(User.class).list(),
                    new Function<User, Long>() {
                        public Long apply(User input) {
                            return input.getId();
                        }
                    });

Upvotes: 0

Jens Schauder
Jens Schauder

Reputation: 81907

I don't think this is possible, cause a query always returns a List: http://docs.jboss.org/hibernate/orm/3.2/api/org/hibernate/Criteria.html#list() or in a special case a single element.

There is just no method that could return a map.

So without hacks like overwriting the Session to create a special Criteria which also has a map() method you can't do what you want.

Just return a list and convert it into a map.

Upvotes: 1

Related Questions