jiangjiguang commented on code in PR #1011: URL: https://github.com/apache/parquet-mr/pull/1011#discussion_r1109339286
########## parquet-generator/src/main/java/org/apache/parquet/encoding/vectorbitpacking/BitPackingGenerator512Vector.java: ########## @@ -0,0 +1,67 @@ +/* + * 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.parquet.encoding.vectorbitpacking; + +import java.io.File; +import java.io.FileOutputStream; +import java.io.IOException; +import java.io.InputStream; +import java.io.OutputStream; + +/** + * This class generates vector bit packers that pack the most significant bit first. + * The result of the generation is checked in. To regenerate the code run this class and check in the result. + */ +public class BitPackingGenerator512Vector { + private static final String CLASS_NAME_PREFIX_FOR_INT = "ByteBitPacking512Vector"; + private static final String CLASS_NAME_PREFIX_FOR_LONG = "ByteBitPacking512VectorForLong"; + + public static void main(String[] args) throws Exception { + String basePath = args[0]; + //TODO: Int for Big Endian + //generateScheme(false, true, basePath); + + // Int for Little Endian + generateScheme(false, false, basePath); + + //TODO: Long for Big Endian + //generateScheme(true, true, basePath); + + //TODO: Long for Little Endian + //generateScheme(true, false, basePath); Review Comment: @gszadovszky As far as I know, most JVM depends on Little Endian, I haven't see that JVM depends on Big Endian, So I only finished the code of Little Endian. "Long for Little Endian" affects on parquet page v2 version, I have finished the code, I will submit it to parquet-mr community after this PR. Indeed, it has no side effects(can't benefit from Java Vector API) if we do not implement them, -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: dev-unsubscr...@parquet.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
