[GitHub] [pinot] richardstartin commented on a change in pull request #7655: introduce `LZ4_WITH_LENGTH` chunk compression type

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

richardstartin commented on a change in pull request #7655:
URL: https://github.com/apache/pinot/pull/7655#discussion_r738676890



##########
File path: pinot-segment-local/src/main/java/org/apache/pinot/segment/local/io/compression/LZ4WithLengthDecompressor.java
##########
@@ -0,0 +1,52 @@
+/**
+ * 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.io.compression;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import net.jpountz.lz4.LZ4DecompressorWithLength;
+import net.jpountz.lz4.LZ4Factory;
+import org.apache.pinot.segment.spi.compression.ChunkDecompressor;
+
+
+/**
+ * Identical to {@code LZ4Decompressor} but can determine the length of
+ * the decompressed output
+ */
+public class LZ4WithLengthDecompressor implements ChunkDecompressor {
+
+  private final LZ4DecompressorWithLength _decompressor;
+
+  LZ4WithLengthDecompressor() {
+    _decompressor = new LZ4DecompressorWithLength(LZ4Factory.fastestInstance().fastDecompressor());

Review comment:
       good catch, let me fix that




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