[GitHub] [lucene-solr] mayya-sharipova commented on a change in pull request #1351: LUCENE-9280: Collectors to skip noncompetitive documents

[GitBox <gi...@apache.org>]

mayya-sharipova commented on a change in pull request #1351: LUCENE-9280: Collectors to skip noncompetitive documents
URL: https://github.com/apache/lucene-solr/pull/1351#discussion_r394655989
 
 

 ##########
 File path: lucene/core/src/java/org/apache/lucene/search/LongDocValuesPointComparator.java
 ##########
 @@ -0,0 +1,164 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.lucene.search;
+
+import org.apache.lucene.document.LongPoint;
+import org.apache.lucene.index.DocValues;
+import org.apache.lucene.index.LeafReaderContext;
+import org.apache.lucene.index.NumericDocValues;
+import org.apache.lucene.index.PointValues;
+import org.apache.lucene.util.DocIdSetBuilder;
+
+import java.io.IOException;
+import java.util.Arrays;
+
+import static org.apache.lucene.search.FieldComparator.IteratorSupplierComparator;
+
+public class LongDocValuesPointComparator extends IteratorSupplierComparator<Long> {
+    private final String field;
+    private final boolean reverse;
+    private final long[] values;
+    private long bottom;
+    private long topValue;
+    protected NumericDocValues docValues;
+    private DocIdSetIterator iterator;
+    private PointValues pointValues;
+    private int maxDoc;
+    private int maxDocVisited;
+
+    public LongDocValuesPointComparator(String field, int numHits, boolean reverse) {
+        this.field = field;
+        this.reverse = reverse;
+        this.values = new long[numHits];
+    }
+
+    private long getValueForDoc(int doc) throws IOException {
+        if (docValues.advanceExact(doc)) {
+            return docValues.longValue();
+        } else {
+            return 0L; // TODO: missing value
+        }
+    }
+
+    @Override
+    public int compare(int slot1, int slot2) {
+        return Long.compare(values[slot1], values[slot2]);
+    }
+
+    @Override
+    public void setTopValue(Long value) {
+        topValue = value;
+    }
+
+    @Override
+    public Long value(int slot) {
+        return Long.valueOf(values[slot]);
+    }
+
+    @Override
+    public LeafFieldComparator getLeafComparator(LeafReaderContext context) throws IOException {
+        docValues = DocValues.getNumeric(context.reader(), field);
+        iterator = docValues;
+        pointValues = context.reader().getPointValues(field);
+        maxDoc = context.reader().maxDoc();
+        maxDocVisited = 0;
+        return this;
+    }
+
+    @Override
+    public void setBottom(int slot) {
+        this.bottom = values[slot];
+    }
+
+    @Override
+    public int compareBottom(int doc) throws IOException {
+        return Long.compare(bottom, getValueForDoc(doc));
+    }
+
+    @Override
+    public int compareTop(int doc) throws IOException {
+        return Long.compare(topValue, getValueForDoc(doc));
+    }
+
+    @Override
+    public void copy(int slot, int doc) throws IOException {
+        maxDocVisited = doc;
+        values[slot] = getValueForDoc(doc);
+    }
+
+    @Override
+    public void setScorer(Scorable scorer) throws IOException {}
+
+    public DocIdSetIterator iterator() {
+        return iterator;
+    }
+
+    public void updateIterator() throws IOException {
 
 Review comment:
   Addressed in 6384b15

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