Lucene Free Text Suggester, get only single tokens as suggestion!

[andi rexha]

Hi!
I have a field in an index for which I want to have a "free text suggestion". 
The field is analyzed, storend  and term vector the field. I tried to use two 
approaches to get the suggestions from the field.

I have tried to apply the free text suggester with a dictionary like : 


             FreeTextSuggester freeTextSuggester = new FreeTextSuggester(new 
WhitespaceAnalyzer(), new WhitespaceAnalyzer(), 2);
             Dictionary dict = new LuceneDictionary(reader, field);
             freeTextSuggester.build(dict);



I have also tried a different approach, buy using the term vector elements for 
each document:

             WFSTCompletionLookup wfstCompletionLookup = new 
WFSTCompletionLookup();
             //it iterates over the term vector and is an InputIterator
            TermVectorInputIterator termVectorInputIterator = new 
TermVectorInputIterator(reader, field);
            wfstCompletionLookup.build(termVectorInputIterator);



I have an index with 916 documents, and approximately 32.000 terms, but I 
always get as suggestion for a few characters input, single tokens suggestion, 
and not n-grams. Does anybody have any suggestion about my problem?

Thank you in advance!