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LUCENE-3572: throw exc if you try to sort by term/ord on doc values field, yet it exists but cannot provide a sorted source 

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1202384 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael McCandless 2011-11-15 19:17:08 +00:00
parent 54e30039cd
commit d4c8f29e23
1 changed files with 7 additions and 1 deletions
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8
lucene/src/java/org/apache/lucene/search/FieldComparator.java
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@ -1670,11 +1670,17 @@ public abstract class FieldComparator<T> {
final IndexDocValues dv = context.reader.docValues(field);
if (dv == null) {
// This may mean entire segment had no docs with
// this DV field; use default field value (empty
// byte[]) in this case:
termsIndex = IndexDocValues.getDefaultSortedSource(ValueType.BYTES_VAR_SORTED, context.reader.maxDoc());
} else {
termsIndex = dv.getSource().asSortedSource();
if (termsIndex == null) {
termsIndex = IndexDocValues.getDefaultSortedSource(ValueType.BYTES_VAR_SORTED, context.reader.maxDoc());
// This means segment has doc values, but they are
// not able to provide a sorted source; consider
// this a hard error:
throw new IllegalStateException("DocValues exist for field \"" + field + "\", but not as a sorted source: type=" + dv.getSource().type() + " reader=" + context.reader);
}
}