Github user dsmiley commented on a diff in the pull request:
https://github.com/apache/lucene-solr/pull/105#discussion_r85603003
--- Diff:
lucene/highlighter/src/java/org/apache/lucene/search/uhighlight/CompositePostingsEnum.java
---
@@ -0,0 +1,165 @@
+/*
+ * 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.uhighlight;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.apache.lucene.index.PostingsEnum;
+import org.apache.lucene.util.BytesRef;
+import org.apache.lucene.util.PriorityQueue;
+
+
+final class CompositePostingsEnum extends PostingsEnum {
+
+ private static final int NO_MORE_POSITIONS = -2;
+ private final BytesRef term;
+ private final int freq;
+ private final PriorityQueue<BoundsCheckingPostingsEnum> queue;
+
+
+ /**
+ * This class is used to ensure we don't over iterate the underlying
+ * postings enum by keeping track of the position relative to the
+ * frequency.
+ * Ideally this would've been an implementation of a PostingsEnum
+ * but it would have to delegate most methods and it seemed easier
+ * to just wrap the tweaked method.
+ */
+ private static final class BoundsCheckingPostingsEnum {
+
+
+ private final PostingsEnum postingsEnum;
+ private final int freq;
+ private int position;
+ private int nextPosition;
+ private int positionInc = 1;
+
+ private int startOffset;
--- End diff --
Don't need these. They can be fetched on-demand from the head of the
queue, easily & cheaply enough.
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