lins at softomatix
Jul 24, 2012, 6:10 AM
Post #2 of 2
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Re: Lucene 3.6: FieldCache.DEFAULT.getStrings returns array of nulls for some fields
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Solved.
As written in chapter 5 I have to index the fields if I want to retrieve them
using the field cache.
Am 24.07.2012 13:10, schrieb Oliver:
> Hello Everyone,
>
> I am developing an application with Lucene 3.6 (Java).
> I am using a NRTManager to ensure I find the (nearly) newest changes in the index.
> I use BooleanQuery containing NumericRangeQuery as BooleanClause(s) (I use 4 of these BooleanClause(s)).
> With my custom Sort implementation everything seems to work fine.
>
> Now I want to create a custom collector to control the returned documents. Having read parts
> of the book Lucene in action 2010 (page 212) I tried to retrieve the values for the fields
> while the method
>
> setNextReader(IndexReader reader, int docBase)
>
> is called in my custom collector and store the arrays to access them in collect (int doc).
>
> The samples in the book show the way to do so (e.g):
>
> String[] urls = FieldCache.DEFAULT.getStrings (reader, "field name");
>
> The problem is that the call returns arrays containing 'null' as values for some fields.
> Even if I am quite sure that there are values for the fields.
> Other fields are filled as expected.
>
> Am I missing something or has the way to retrieve the values changed between 2.9 and 3.6 and does not work anymore in 3.6?
>
> Thanks,
>
> Oliver
>
>
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