> @Test
> public void distinct() throws Exception {
> RAMDirectory directory = new RAMDirectory();
> IndexWriter writer = new IndexWriter(directory, new
> WhitespaceAnalyzer(), true, IndexWriter.MaxFieldLength.UNLIMITED);
>
> for (int l = -2; l <= 2; l++) {
> Document doc = new Document();
> doc.add(new Field("text", "the big brown", Field.Store.NO,
> Field.Index.ANALYZED));
> doc.add(new NumericField("trie", Field.Store.NO,
> true).setIntValue(l));
> writer.addDocument(doc);
> }
>
> writer.close();
>
> IndexReader reader = IndexReader.open(directory, true);
> TermEnum termEnum = reader.terms(new Term("trie", ""));
> Term next = termEnum.term();
> List<Integer> ints = new ArrayList<Integer>();
>
> while (next != null && next.field().equals("trie")) {
> ints.add(NumericUtils.prefixCodedToInt(next.text()));
> next = termEnum.next() ? termEnum.term() : null;
> }
>
> reader.close();
>
> log.info(ints.toString());
> }
>
> ==> [-2, -1, 0, 1, 2, -16, 0, -256, 0, -4096, 0, -65536, 0, -1048576, 0,
> -16777216, 0, -268435456, 0]
You can add a check in your while statement to break iteration, if the next
lower precision is used:
while (next != null && next.field().equals("trie") && next.term().charAt(0)
== NumericUtils.SHIFT_START_INT)...
use the same constant for float, and SHIFT_START_LONG for long and double.
This should work. Maybe we add a method to NumericUtils that checks this and
returns true/false if the term is not of highest precision.
Uwe
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