[GitHub] [pinot] atris commented on a change in pull request #8384: Implement Native Text Operator

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

atris commented on a change in pull request #8384:
URL: https://github.com/apache/pinot/pull/8384#discussion_r840221406



##########
File path: pinot-segment-local/src/main/java/org/apache/pinot/segment/local/segment/index/readers/text/NativeTextIndexReader.java
##########
@@ -0,0 +1,141 @@
+/**
+ * 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.pinot.segment.local.segment.index.readers.text;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.Collections;
+import java.util.PrimitiveIterator;
+import org.apache.avro.util.ByteBufferInputStream;
+import org.apache.pinot.segment.local.segment.index.readers.BitmapInvertedIndexReader;
+import org.apache.pinot.segment.local.utils.nativefst.FST;
+import org.apache.pinot.segment.local.utils.nativefst.ImmutableFST;
+import org.apache.pinot.segment.local.utils.nativefst.NativeTextIndexCreator;
+import org.apache.pinot.segment.local.utils.nativefst.utils.RegexpMatcher;
+import org.apache.pinot.segment.spi.index.reader.TextIndexReader;
+import org.apache.pinot.segment.spi.memory.PinotDataBuffer;
+import org.apache.pinot.segment.spi.store.SegmentDirectoryPaths;
+import org.roaringbitmap.RoaringBitmapWriter;
+import org.roaringbitmap.buffer.ImmutableRoaringBitmap;
+import org.roaringbitmap.buffer.MutableRoaringBitmap;
+import org.slf4j.LoggerFactory;
+
+
+public class NativeTextIndexReader implements TextIndexReader {
+  private static final org.slf4j.Logger LOGGER = LoggerFactory.getLogger(NativeTextIndexReader.class);
+
+  private final String _column;
+  private int _numDocs;
+  private final File _indexFile;
+  private final PinotDataBuffer _buffer;
+
+  private FST _fst;
+  private BitmapInvertedIndexReader _invertedIndex;
+
+  public NativeTextIndexReader(String column, File indexDir, int numDocs) {

Review comment:
       The interface follows the same semantics as TextIndexReader interface, hence this signature




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