How to correctly get the value given a DocId

[Sergio]

Hi guys!

I am a newbie and I am trying to upgrade from Lucene 6.2.1 to 8.4.1
The previous code was leveraging this
https://github.com/apache/lucene-solr/blob/releases/lucene-solr/6.2.1/lucene/core/src/java/org/apache/lucene/index/NumericDocValues.java#L34

now

https://github.com/apache/lucene-solr/blob/releases/lucene-solr/8.4.1/lucene/core/src/java/org/apache/lucene/index/NumericDocValues.java#L32-L35

Previously there was no need to deal with the iterator and I found in the
code a comment regarding



** Returns the numeric value for the current document ID.  * It is illegal
to call this method after {@link #advanceExact(int)}   * returned {@code
false}.   * @return numeric value*
If the below snippet is not correct how should I proceed?

public static float
getFloatValueFromNumericDocValuesAndDocId(NumericDocValues
numericDocValues, int docId) throws IOException {
  if (numericDocValues.advanceExact(docId)) {
    return Float.intBitsToFloat((int)numericDocValues.longValue());
  } else {
    throw new RuntimeException("It has not been possible to
advanceExact for " + docId) ;
  }
}

public static int
getIntValueFromNumericDocValuesAndDocId(NumericDocValues
numericDocValues, int docId) throws IOException {
  if (numericDocValues.advanceExact(docId)) {
    return (int) numericDocValues.longValue();
  } else {
    throw new RuntimeException("It has not been possible to
advanceExact for " + docId) ;
  }
}

public static long
getLongValueFromNumericDocValuesAndDocId(NumericDocValues
numericDocValues, int docId) throws IOException {
  if (numericDocValues.advanceExact(docId)) {
    return numericDocValues.longValue();
  } else {
    throw new RuntimeException("It has not been possible to
advanceExact for " + docId) ;
  }
}

public static BytesRef
getBytesRefValueFromSortedDocValuesAndDocId(SortedDocValues
numericDocValues, int docId) throws IOException {
  if (numericDocValues.advanceExact(docId)) {
    return numericDocValues.binaryValue();
  } else {
    throw new RuntimeException("It has not been possible to
advanceExact for " + docId) ;
  }
}




Thanks to everyone!

Sergio