Package parquet.format

Examples of parquet.format.PageHeader

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    @Override
    public DictionaryPage readDictionaryPage() {
      if (dictionaryPage == null) {
        try {
          long pos = in.getPos();
          PageHeader pageHeader = Util.readPageHeader(in);
          if (pageHeader.getDictionary_page_header() == null) {
            in.seek(pos);
            return null;
          }
          dictionaryPage =
                  new DictionaryPage(
                          decompressor.decompress(BytesInput.from(in, pageHeader.compressed_page_size), pageHeader.getUncompressed_page_size()),
                          pageHeader.getDictionary_page_header().getNum_values(),
                          parquetMetadataConverter.getEncoding(pageHeader.dictionary_page_header.encoding)
                  );
        } catch (IOException e) {
          throw new RuntimeException(e);
        }
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        if (lastPage != null) {
          lastPage.release();
          lastPage = null;
        }
        while(valueReadSoFar < metaData.getValueCount()) {
          PageHeader pageHeader = Util.readPageHeader(in);
          switch (pageHeader.type) {
            case DICTIONARY_PAGE:
              if (dictionaryPage == null) {
                dictionaryPage =
                        new DictionaryPage(
                                decompressor.decompress(BytesInput.from(in, pageHeader.compressed_page_size), pageHeader.getUncompressed_page_size()),
                                pageHeader.uncompressed_page_size,
                                parquetMetadataConverter.getEncoding(pageHeader.dictionary_page_header.encoding)
                        );
              } else {
                in.skip(pageHeader.compressed_page_size);
              }
              break;
            case DATA_PAGE:
              valueReadSoFar += pageHeader.data_page_header.getNum_values();
              ByteBuf buf = allocator.buffer(pageHeader.compressed_page_size);
              lastPage = buf;
              ByteBuffer buffer = buf.nioBuffer(0, pageHeader.compressed_page_size);
              CompatibilityUtil.getBuf(in, buffer, pageHeader.compressed_page_size);
              return new Page(
                      decompressor.decompress(BytesInput.from(buffer, 0, pageHeader.compressed_page_size), pageHeader.getUncompressed_page_size()),
                      pageHeader.data_page_header.num_values,
                      pageHeader.uncompressed_page_size,
                      parquetMetadataConverter.fromParquetStatistics(pageHeader.data_page_header.statistics, columnDescriptor.getType()),
                      parquetMetadataConverter.getEncoding(pageHeader.data_page_header.repetition_level_encoding),
                      parquetMetadataConverter.getEncoding(pageHeader.data_page_header.definition_level_encoding),
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    try {
      FSDataInputStream f = fs.open(path);
      this.dataReader = new ColumnDataReader(f, start, totalByteLength);
      if (columnChunkMetaData.getDictionaryPageOffset() > 0) {
        f.seek(columnChunkMetaData.getDictionaryPageOffset());
        PageHeader pageHeader = Util.readPageHeader(f);
        assert pageHeader.type == PageType.DICTIONARY_PAGE;

        BytesInput bytesIn;
        ByteBuf uncompressedData=allocateBuffer(pageHeader.getUncompressed_page_size());
        allocatedDictionaryBuffers.add(uncompressedData);
        if(parentColumnReader.columnChunkMetaData.getCodec()==CompressionCodecName.UNCOMPRESSED) {
          dataReader.getPageAsBytesBuf(uncompressedData, pageHeader.compressed_page_size);
          bytesIn=parentColumnReader.parentReader.getCodecFactoryExposer().getBytesInput(uncompressedData,
            pageHeader.getUncompressed_page_size());
        }else{
          ByteBuf compressedData=allocateBuffer(pageHeader.compressed_page_size);
          dataReader.getPageAsBytesBuf(compressedData, pageHeader.compressed_page_size);
          bytesIn = parentColumnReader.parentReader.getCodecFactoryExposer()
            .decompress(parentColumnReader.columnChunkMetaData.getCodec(),
              compressedData,
              uncompressedData,
              pageHeader.compressed_page_size,
              pageHeader.getUncompressed_page_size());
          compressedData.release();
        }
        DictionaryPage page = new DictionaryPage(
            bytesIn,
            pageHeader.uncompressed_page_size,
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  • org.apache.drill.exec.store.parquet.columnreaders.PageReader
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