If you want to read the values again, you need to call setDocument (Lucene
< 7.0) or advanceExact (Lucene >= 7.0) before calling nextValue().
Le lun. 19 févr. 2018 à 14:41, Vadim Gindin <vgin...@detectum.com> a écrit :
> Hi all
>
> I use DocValue for scoring function. I.e. I have some column with integers,
> that are used in scoring formula. So I have a scorer that calculates
> scoring function twice:
> - in score()
> - in explain()
>
> I got the following error in explain:
>
> Caused by: java.lang.IndexOutOfBoundsException
> at java.nio.Buffer.checkIndex(Buffer.java:540) ~[?:1.8.0_161]
> at java.nio.DirectByteBuffer.get(DirectByteBuffer.java:253)
> ~[?:1.8.0_161]
> at
> org.apache.lucene.store.ByteBufferGuard.getByte(ByteBufferGuard.java:118)
> ~[lucene-core-7.1.0.jar:7.1.0 84c90ad2c0218156c840e19a64d72b8a38550659 -
> ubuntu - 2017-10-13 16:12:42]
> at
>
> org.apache.lucene.store.ByteBufferIndexInput$SingleBufferImpl.readByte(ByteBufferIndexInput.java:385)
> ~[lucene-core-7.1.0.jar:7.1.0 84c90ad2c0218156c840e19a64d72b8a38550659 -
> ubuntu - 2017-10-13 16:12:42]
> at
>
> org.apache.lucene.util.packed.DirectReader$DirectPackedReader8.get(DirectReader.java:145)
> ~[lucene-core-7.1.0.jar:7.1.0 84c90ad2c0218156c840e19a64d72b8a38550659 -
> ubuntu - 2017-10-13 16:12:42]
> at
>
> org.apache.lucene.codecs.lucene70.Lucene70DocValuesProducer$3.longValue(Lucene70DocValuesProducer.java:481)
> ~[lucene-core-7.1.0.jar:7.1.0 84c90ad2c0218156c840e19a64d72b8a38550659 -
> ubuntu - 2017-10-13 16:12:42]
> at
>
> org.apache.lucene.index.SingletonSortedNumericDocValues.nextValue(SingletonSortedNumericDocValues.java:73)
> ~[lucene-core-7.1.0.jar:7.1.0 84c90ad2c0218156c840e19a64d72b8a38550659 -
> ubuntu - 2017-10-13 16:12:42]
>
> I've found the following comment in the source code of
> SortedNumericDocValues.java:
>
> /**
> * Iterates to the next value in the current document. Do not call
> this more than {@link #docValueCount} times
> * for the document.
> */
>
> public abstract long nextValue() throws IOException;
>
>
> Questions:
> 1) Why I can't read the values twice?
> 2) How can I manage this situation?
> 3) Can it work for NumericDocValues?
>
> Regards,
> Vadim Gindin
>
