[hibernate-dev] [HSEARCH-670] Add indexNullAs to @IndexedEmbedded

[Davide D'Alto]

Hello,
I've created a prototype for HSEARCH-670:
https://github.com/DavideD/hibernate-search/commits/HSEARCH-670

It seems to work but I'm not sure about the options to use indexing
the null value.
At the moment it uses the following LucenOption object:

LuceneOptions options = new LuceneOptionsImpl(
                                        Store.YES,
                                        
org.apache.lucene.document.Field.Index.ANALYZED,
                                        
org.apache.lucene.document.Field.TermVector.NO,
                                        1F );

And I use the following default TwoWayStringBridge:

TwoWayStringBridge fb = new TwoWayStringBridge() {
                                
                                @Override
                                public String objectToString(Object object) {
                                        return nullMarker;
                                }
                                
                                @Override
                                public Object stringToObject(String 
stringValue) {
                                        return null;
                                }
                        };

This is the method:
https://github.com/DavideD/hibernate-search/commit/52a9280321e6ea06ff8324275ac7e0db55dab16b#L2R576

Do they make sense?

Cheers,
Davide
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