[hibernate-dev] [HSEARCH-566] Indexing null values for an @ElementCollection

[Emmanuel Bernard]

On 1 août 2011, at 10:31, Sanne Grinovero wrote:

> 2011/8/1 Emmanuel Bernard <emmanuel at hibernate.org>:
>> 
>> On 31 juil. 2011, at 21:44, Sanne Grinovero wrote:
>> 
>>> @ElementCollection
>>> @Field(indexNullAsl="nullToken")
>>> String[] tags
>> 
>> Hum is it really the way we are going? ie @Field would be used by the elements of the collection if it's a collection?
>> 
>> I'm not a big fan for a couple of reasons:
>> 
>> - it breaks backward compatibility
>> - I cannot write a custom collection bridge
> 
> How is this breaking backwards compatibility, when this was previously
> not supported? This was needing a field bridge, and since I've been
> suggesting many times on the forum how to add multiple fields, it
> seems a common use case.

You have always been able to write a FieldBridge that accepts a Collection and do whatever you want in it.

@Field(bridge=@FieldBridge(impl=CustomCollFB.class)
public Collection<String> getNames() { ... }

> I think this new bridge could be applied to the elements in this case,
> but be overridden by a custom bridge: so if someone was defining his
> own custom bridge it would still be applied instead.
> The point of the feature is that when mapping collections of
> primitives, people don't need to provide a custom bridge, and @Field
> is all what is needed to index the elements; of course this should not
> prevent more advanced mappings.

So you're saying that assuming you're OK with the default bridges, the elements of the collection will be indexed, but the minute you override the @FieldBridge, we default back to the existing behavior ie be a bridge accepting the collection.
Is that correct?

## How about Date resolution? 

You would let people set a @Resolution and be applied to the elements?

## How about NumericField?

Same as @Resolution?

## Custom bridge for elements

If a user wants a custom bridge for the elements, he needs to write a custom bridge accepting the collection. Is that correct?

I'm trying to get a grasp on the limitations.