org.apache.parquet.hadoop.util.CompressionConverter Maven / Gradle / Ivy
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* 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
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package org.apache.parquet.hadoop.util;
import org.apache.parquet.ParquetReadOptions;
import org.apache.parquet.bytes.BytesInput;
import org.apache.parquet.format.PageHeader;
import org.apache.parquet.format.Util;
import org.apache.parquet.hadoop.ParquetFileReader;
import org.apache.parquet.hadoop.ParquetFileWriter;
import org.apache.parquet.hadoop.metadata.CompressionCodecName;
import org.apache.parquet.hadoop.metadata.ParquetMetadata;
import org.apache.parquet.hadoop.rewrite.ParquetRewriter;
import org.apache.parquet.io.InputFile;
import org.apache.parquet.io.SeekableInputStream;
import org.apache.parquet.schema.MessageType;
import java.io.IOException;
@Deprecated
public class CompressionConverter {
private ParquetRewriter rewriter;
public void processBlocks(TransParquetFileReader reader, ParquetFileWriter writer, ParquetMetadata meta, MessageType schema,
String createdBy, CompressionCodecName codecName) throws IOException {
rewriter = new ParquetRewriter(reader, writer, meta, schema, createdBy, codecName, null, null);
rewriter.processBlocks();
}
public BytesInput readBlock(int length, TransParquetFileReader reader) throws IOException {
return rewriter.readBlock(length, reader);
}
public BytesInput readBlockAllocate(int length, TransParquetFileReader reader) throws IOException {
return rewriter.readBlockAllocate(length, reader);
}
public static final class TransParquetFileReader extends ParquetFileReader {
public TransParquetFileReader(InputFile file, ParquetReadOptions options) throws IOException {
super(file, options);
}
public void setStreamPosition(long newPos) throws IOException {
f.seek(newPos);
}
public void blockRead(byte[] data, int start, int len) throws IOException {
f.readFully(data, start, len);
}
public PageHeader readPageHeader() throws IOException {
return Util.readPageHeader(f);
}
public long getPos() throws IOException {
return f.getPos();
}
public SeekableInputStream getStream() {
return f;
}
}
}