add javadocs

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1238097 13f79535-47bb-0310-9956-ffa450edef68
2012-01-30 23:57:07 +00:00 · 2012-01-30 23:57:07 +00:00 · d7b1f5086c
parent 226c270cd2
commit d7b1f5086c
1 changed files with 4 additions and 0 deletions
--- a/lucene/src/java/org/apache/lucene/index/AtomicReader.java
+++ b/lucene/src/java/org/apache/lucene/index/AtomicReader.java
@ -223,6 +223,10 @@ public abstract class AtomicReader extends IndexReader {
   */
  public abstract DocValues docValues(String field) throws IOException;
  
+  /**
+   * Returns {@link DocValues} for this field's normalization values.
+   * This method may return null if the field has no norms.
+   */
  public abstract DocValues normValues(String field) throws IOException;

  /**