Refactor dummy scorables.

lucene/core/src/java/org/apache/lucene/search/BlockMaxConjunctionBulkScorer.java

@@ -39,7 +39,7 @@ final class BlockMaxConjunctionBulkScorer extends BulkScorer {
   private final DocIdSetIterator[] iterators;
   private final DocIdSetIterator lead1, lead2;
   private final Scorable scorer1, scorer2;
-  private final DocAndScore scorable = new DocAndScore();
+  private final SimpleScorable scorable = new SimpleScorable();
   private final double[] sumOfOtherClauses;
   private final int maxDoc;
 
@@ -202,20 +202,4 @@ private void scoreWindow(
   public long cost() {
     return lead1.cost();
   }
-
-  private static class DocAndScore extends Scorable {
-
-    float score;
-    float minCompetitiveScore;
-
-    @Override
-    public float score() throws IOException {
-      return score;
-    }
-
-    @Override
-    public void setMinCompetitiveScore(float minScore) throws IOException {
-      this.minCompetitiveScore = minScore;
-    }
-  }
 }

lucene/core/src/java/org/apache/lucene/search/BooleanScorer.java

@@ -80,7 +80,7 @@ public DisiWrapper get(int i) {
   final DisiWrapper[] leads;
   final HeadPriorityQueue head;
   final TailPriorityQueue tail;
-  final Score score = new Score();
+  final SimpleScorable score = new SimpleScorable();
   final int minShouldMatch;
   final long cost;
   final boolean needsScores;

lucene/core/src/java/org/apache/lucene/search/BooleanScorerSupplier.java

@@ -251,7 +251,7 @@ public int score(final LeafCollector collector, Bits acceptDocs, int min, int ma
           throws IOException {
         final LeafCollector noScoreCollector =
             new LeafCollector() {
-              Score fake = new Score();
+              SimpleScorable fake = new SimpleScorable();
 
               @Override
               public void setScorer(Scorable scorer) throws IOException {

lucene/core/src/java/org/apache/lucene/search/MatchAllDocsQuery.java

@@ -53,7 +53,7 @@ public BulkScorer bulkScorer() throws IOException {
               public int score(LeafCollector collector, Bits acceptDocs, int min, int max)
                   throws IOException {
                 max = Math.min(max, maxDoc);
-                Score scorer = new Score();
+                SimpleScorable scorer = new SimpleScorable();
                 scorer.score = score;
                 collector.setScorer(scorer);
                 for (int doc = min; doc < max; ++doc) {

lucene/core/src/java/org/apache/lucene/search/MaxScoreBulkScorer.java

@@ -43,8 +43,7 @@ final class MaxScoreBulkScorer extends BulkScorer {
   // The minimum value of minCompetitiveScore that would produce a more favorable partitioning.
   float nextMinCompetitiveScore;
   private final long cost;
-  float minCompetitiveScore;
-  private final Score scorable = new Score();
+  final SimpleScorable scorable = new SimpleScorable();
   final double[] maxScoreSums;
   private final DisiWrapper filter;
 
@@ -127,7 +126,7 @@ public int score(LeafCollector collector, Bits acceptDocs, int min, int max) thr
       while (top.doc < outerWindowMax) {
         scoreInnerWindow(collector, acceptDocs, outerWindowMax, filter);
         top = essentialQueue.top();
-        if (minCompetitiveScore >= nextMinCompetitiveScore) {
+        if (scorable.minCompetitiveScore >= nextMinCompetitiveScore) {
           // The minimum competitive score increased substantially, so we can now partition scorers
           // in a more favorable way.
           break;
@@ -254,7 +253,7 @@ private void scoreInnerWindowAsConjunction(LeafCollector collector, Bits acceptD
       // We specialize handling the second best scorer, which seems to help a bit with performance.
       // But this is the exact same logic as in the below for loop.
       if ((float) MathUtil.sumUpperBound(score + maxScoreSumAtLead2, allScorers.length)
-          < minCompetitiveScore) {
+          < scorable.minCompetitiveScore) {
         // a competitive match is not possible according to max scores, skip to the next candidate
         lead1.doc = lead1.iterator.nextDoc();
         continue;
@@ -272,7 +271,7 @@ private void scoreInnerWindowAsConjunction(LeafCollector collector, Bits acceptD
 
       for (int i = allScorers.length - 3; i >= firstRequiredScorer; --i) {
         if ((float) MathUtil.sumUpperBound(score + maxScoreSums[i], allScorers.length)
-            < minCompetitiveScore) {
+            < scorable.minCompetitiveScore) {
           // a competitive match is not possible according to max scores, skip to the next candidate
           lead1.doc = lead1.iterator.nextDoc();
           continue outer;
@@ -389,7 +388,7 @@ private void scoreNonEssentialClauses(
     for (int i = numNonEssentialClauses - 1; i >= 0; --i) {
       float maxPossibleScore =
           (float) MathUtil.sumUpperBound(score + maxScoreSums[i], allScorers.length);
-      if (maxPossibleScore < minCompetitiveScore) {
+      if (maxPossibleScore < scorable.minCompetitiveScore) {
         // Hit is not competitive.
         return;
       }
@@ -435,7 +434,7 @@ boolean partitionScorers() {
       double newMaxScoreSum = maxScoreSum + w.maxWindowScore;
       float maxScoreSumFloat =
           (float) MathUtil.sumUpperBound(newMaxScoreSum, firstEssentialScorer + 1);
-      if (maxScoreSumFloat < minCompetitiveScore) {
+      if (maxScoreSumFloat < scorable.minCompetitiveScore) {
         maxScoreSum = newMaxScoreSum;
         allScorers[firstEssentialScorer] = w;
         maxScoreSums[firstEssentialScorer] = maxScoreSum;
@@ -473,7 +472,7 @@ boolean partitionScorers() {
         if (firstRequiredScorer > 1) {
           maxPossibleScoreWithoutPreviousClause += maxScoreSums[firstRequiredScorer - 2];
         }
-        if ((float) maxPossibleScoreWithoutPreviousClause >= minCompetitiveScore) {
+        if ((float) maxPossibleScoreWithoutPreviousClause >= scorable.minCompetitiveScore) {
           break;
         }
         // The sum of maximum scores ignoring the previous clause is less than the minimum
@@ -507,19 +506,4 @@ private int nextCandidate(int rangeEnd) {
   public long cost() {
     return cost;
   }
-
-  private class Score extends Scorable {
-
-    float score;
-
-    @Override
-    public float score() {
-      return score;
-    }
-
-    @Override
-    public void setMinCompetitiveScore(float minScore) throws IOException {
-      MaxScoreBulkScorer.this.minCompetitiveScore = minScore;
-    }
-  }
 }

lucene/core/src/java/org/apache/lucene/search/SortRescorer.java

@@ -55,7 +55,7 @@ public TopDocs rescore(IndexSearcher searcher, TopDocs firstPassTopDocs, int top
     int docBase = 0;
 
     LeafCollector leafCollector = null;
-    Score score = new Score();
+    SimpleScorable score = new SimpleScorable();
 
     while (hitUpto < hits.length) {
       ScoreDoc hit = hits[hitUpto];

lucene/core/src/test/org/apache/lucene/search/TestBooleanScorer.java

@@ -102,7 +102,7 @@ public BulkScorer bulkScorer() throws IOException {
                 public int score(LeafCollector collector, Bits acceptDocs, int min, int max)
                     throws IOException {
                   assert min == 0;
-                  collector.setScorer(new Score());
+                  collector.setScorer(new SimpleScorable());
                   collector.collect(0);
                   return DocIdSetIterator.NO_MORE_DOCS;
                 }

lucene/core/src/test/org/apache/lucene/search/TestConstantScoreQuery.java

@@ -157,7 +157,7 @@ public void testWrapped2Times() throws Exception {
 
       // for the combined BQ, the scorer should always be BooleanScorer's BucketScorer, because our
       // scorer supports out-of order collection!
-      final Class<Score> bucketScorerClass = Score.class;
+      final Class<SimpleScorable> bucketScorerClass = SimpleScorable.class;
       checkHits(searcher, csqbq, csqbq.getBoost(), bucketScorerClass);
     } finally {
       IOUtils.close(reader, directory);

lucene/core/src/test/org/apache/lucene/search/TestMaxScoreBulkScorer.java

@@ -658,23 +658,23 @@ public void testPartition() throws IOException {
     assertEquals(3, scorer.firstRequiredScorer); // no required clauses
 
     // less than the minimum score of every clause
-    scorer.minCompetitiveScore = 0.09f;
+    scorer.scorable.minCompetitiveScore = 0.09f;
     Collections.shuffle(Arrays.asList(scorer.allScorers), random());
     scorer.updateMaxWindowScores(4, 100);
     assertTrue(scorer.partitionScorers());
     assertEquals(0, scorer.firstEssentialScorer); // all clauses are still essential
     assertEquals(3, scorer.firstRequiredScorer); // no required clauses
 
     // equal to the maximum score of `the`
-    scorer.minCompetitiveScore = 0.1f;
+    scorer.scorable.minCompetitiveScore = 0.1f;
     Collections.shuffle(Arrays.asList(scorer.allScorers), random());
     scorer.updateMaxWindowScores(4, 100);
     assertTrue(scorer.partitionScorers());
     assertEquals(0, scorer.firstEssentialScorer); // all clauses are still essential
     assertEquals(3, scorer.firstRequiredScorer); // no required clauses
 
     // gt than the minimum score of `the`
-    scorer.minCompetitiveScore = 0.11f;
+    scorer.scorable.minCompetitiveScore = 0.11f;
     Collections.shuffle(Arrays.asList(scorer.allScorers), random());
     scorer.updateMaxWindowScores(4, 100);
     assertTrue(scorer.partitionScorers());
@@ -683,7 +683,7 @@ public void testPartition() throws IOException {
     assertSame(the, scorer.allScorers[0].scorer);
 
     // equal to the sum of the max scores of the and quick
-    scorer.minCompetitiveScore = 1.1f;
+    scorer.scorable.minCompetitiveScore = 1.1f;
     Collections.shuffle(Arrays.asList(scorer.allScorers), random());
     scorer.updateMaxWindowScores(4, 100);
     assertTrue(scorer.partitionScorers());
@@ -692,7 +692,7 @@ public void testPartition() throws IOException {
     assertSame(the, scorer.allScorers[0].scorer);
 
     // greater than the sum of the max scores of the and quick
-    scorer.minCompetitiveScore = 1.11f;
+    scorer.scorable.minCompetitiveScore = 1.11f;
     Collections.shuffle(Arrays.asList(scorer.allScorers), random());
     scorer.updateMaxWindowScores(4, 100);
     assertTrue(scorer.partitionScorers());
@@ -703,7 +703,7 @@ public void testPartition() throws IOException {
     assertSame(fox, scorer.allScorers[2].scorer);
 
     // equal to the sum of the max scores of the and fox
-    scorer.minCompetitiveScore = 1.2f;
+    scorer.scorable.minCompetitiveScore = 1.2f;
     Collections.shuffle(Arrays.asList(scorer.allScorers), random());
     scorer.updateMaxWindowScores(4, 100);
     assertTrue(scorer.partitionScorers());
@@ -714,7 +714,7 @@ public void testPartition() throws IOException {
     assertSame(fox, scorer.allScorers[2].scorer);
 
     // greater than the sum of the max scores of the and fox
-    scorer.minCompetitiveScore = 1.21f;
+    scorer.scorable.minCompetitiveScore = 1.21f;
     Collections.shuffle(Arrays.asList(scorer.allScorers), random());
     scorer.updateMaxWindowScores(4, 100);
     assertTrue(scorer.partitionScorers());
@@ -725,7 +725,7 @@ public void testPartition() throws IOException {
     assertSame(fox, scorer.allScorers[2].scorer);
 
     // equal to the sum of the max scores of quick and fox
-    scorer.minCompetitiveScore = 2.1f;
+    scorer.scorable.minCompetitiveScore = 2.1f;
     Collections.shuffle(Arrays.asList(scorer.allScorers), random());
     scorer.updateMaxWindowScores(4, 100);
     assertTrue(scorer.partitionScorers());
@@ -736,7 +736,7 @@ public void testPartition() throws IOException {
     assertSame(fox, scorer.allScorers[2].scorer);
 
     // greater than the sum of the max scores of quick and fox
-    scorer.minCompetitiveScore = 2.11f;
+    scorer.scorable.minCompetitiveScore = 2.11f;
     Collections.shuffle(Arrays.asList(scorer.allScorers), random());
     scorer.updateMaxWindowScores(4, 100);
     assertTrue(scorer.partitionScorers());
@@ -747,7 +747,7 @@ public void testPartition() throws IOException {
     assertSame(fox, scorer.allScorers[2].scorer);
 
     // greater than the sum of the max scores of quick and fox
-    scorer.minCompetitiveScore = 2.11f;
+    scorer.scorable.minCompetitiveScore = 2.11f;
     Collections.shuffle(Arrays.asList(scorer.allScorers), random());
     scorer.updateMaxWindowScores(4, 100);
     assertTrue(scorer.partitionScorers());
@@ -758,7 +758,7 @@ public void testPartition() throws IOException {
     assertSame(fox, scorer.allScorers[2].scorer);
 
     // equal to the sum of the max scores of all terms
-    scorer.minCompetitiveScore = 2.2f;
+    scorer.scorable.minCompetitiveScore = 2.2f;
     Collections.shuffle(Arrays.asList(scorer.allScorers), random());
     scorer.updateMaxWindowScores(4, 100);
     assertTrue(scorer.partitionScorers());
@@ -769,7 +769,7 @@ public void testPartition() throws IOException {
     assertSame(fox, scorer.allScorers[2].scorer);
 
     // greater than the sum of the max scores of all terms
-    scorer.minCompetitiveScore = 2.21f;
+    scorer.scorable.minCompetitiveScore = 2.21f;
     Collections.shuffle(Arrays.asList(scorer.allScorers), random());
     scorer.updateMaxWindowScores(4, 100);
     assertFalse(scorer.partitionScorers()); // no possible match in this window