I get a ClassCastException

Learning how to use Hibernate Criteria, i get the following error

here ->

Pojo ->

Probably complaining about casting Object to TestRank? but this works

???

If you use Projections this way your result will be a List of arrays of Objects, not a List of POJOs. Given you have all the properties you are Projecting already in your POJO I don't see what benefit using Projections is giving you here. What is it you are trying to achieve?

Paul Sturrock wrote:If you use Projections this way your result will be a List of arrays of Objects, not a List of POJOs. Given you have all the properties you are Projecting already in your POJO I don't see what benefit using Projections is giving you here. What is it you are trying to achieve?

If you don;t mind could you please explain the use of projections.property? I'm new to hibernate and busy using examples but some are not clear enough ... Thanks Paul

You might use Projections to query for properties not on the object you are querying, for example a derived property (thing average, maximum etc.) Or you might use them to create a new, unmapped object at runtime. If all you are doing is returning the properties of an already mapped object then you don't need to use them.

Paul Sturrock wrote:You might use Projections to query for properties not on the object you are querying, for example a derived property (thing average, maximum etc.) Or you might use them to create a new, unmapped object at runtime. If all you are doing is returning the properties of an already mapped object then you don't need to use them.

How should i interpret the following 'incomplete' queries?

Perhaps am trying to figure which should i use for one to many relationship?

In fact Paul, looking at the POJO i posted, how would i write a Criteria query to get all RankProfiles with a specified id? Note that RankProfile has a many to one Rank relationship, so a Rank can be associated with many RankProfiles ... I think given such examples, i may be set to begin coding my Criterion queries

What you might do is add another criterion on rankProfiles that matches on id. Have a look at this for an example.

I tried these two methods

Both seem to work, which one is recommended? Would they work for lazy-initialization/loading?