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Posted to commits@lucene.apache.org by mi...@apache.org on 2012/08/21 01:56:44 UTC
svn commit: r1375332 -
/lucene/dev/trunk/lucene/core/src/java/org/apache/lucene/search/DocIdSetIterator.java
Author: mikemccand
Date: Mon Aug 20 23:56:43 2012
New Revision: 1375332
URL: http://svn.apache.org/viewvc?rev=1375332&view=rev
Log:
LUCENE-4313: make it clear that DISI.advance behavior is undefined if target <= current
Modified:
lucene/dev/trunk/lucene/core/src/java/org/apache/lucene/search/DocIdSetIterator.java
Modified: lucene/dev/trunk/lucene/core/src/java/org/apache/lucene/search/DocIdSetIterator.java
URL: http://svn.apache.org/viewvc/lucene/dev/trunk/lucene/core/src/java/org/apache/lucene/search/DocIdSetIterator.java?rev=1375332&r1=1375331&r2=1375332&view=diff
==============================================================================
--- lucene/dev/trunk/lucene/core/src/java/org/apache/lucene/search/DocIdSetIterator.java (original)
+++ lucene/dev/trunk/lucene/core/src/java/org/apache/lucene/search/DocIdSetIterator.java Mon Aug 20 23:56:43 2012
@@ -60,13 +60,17 @@ public abstract class DocIdSetIterator {
*/
public abstract int nextDoc() throws IOException;
- /**
- * Advances to the first beyond (see NOTE below) the current whose document
- * number is greater than or equal to <i>target</i>. Returns the current
- * document number or {@link #NO_MORE_DOCS} if there are no more docs in the
- * set.
+ /**
+ * Advances to the first beyond the current whose document number is greater
+ * than or equal to <i>target</i>, and returns the document number itself.
+ * Exhausts the iterator and returns {@link #NO_MORE_DOCS} if <i>target</i>
+ * is greater than the highest document number in the set.
* <p>
- * Behaves as if written:
+ * The behavior of this method is <b>undefined</b> when called with
+ * <code> target ≤ current</code>, or after the iterator has exhausted.
+ * Both cases may result in unpredicted behavior.
+ * <p>
+ * When <code> target > current</code> it behaves as if written:
*
* <pre>
* int advance(int target) {
@@ -79,18 +83,12 @@ public abstract class DocIdSetIterator {
*
* Some implementations are considerably more efficient than that.
* <p>
- * <b>NOTE:</b> when <code> target ≤ current</code> implementations may opt
- * not to advance beyond their current {@link #docID()}.
- * <p>
* <b>NOTE:</b> this method may be called with {@link #NO_MORE_DOCS} for
* efficiency by some Scorers. If your implementation cannot efficiently
* determine that it should exhaust, it is recommended that you check for that
* value in each call to this method.
* <p>
- * <b>NOTE:</b> after the iterator has exhausted you should not call this
- * method, as it may result in unpredicted behavior.
- * <p>
- *
+ *
* @since 2.9
*/
public abstract int advance(int target) throws IOException;