Examples with FileHeader org.apache.carbondata.format.FileHeader used on opensource projects

Example 1 with FileHeader

use of org.apache.carbondata.format.FileHeader in project carbondata by apache.

the class CarbonMetadataUtil method getFileHeader.

/**
   * Below method will be used to prepare the file header object for carbondata file
   *
   * @param isFooterPresent  is footer present in carbon data file
   * @param columnSchemaList list of column schema
   * @param schemaUpdatedTimeStamp  schema updated time stamp to be used for restructure scenarios
   * @return file header thrift object
   */
public static FileHeader getFileHeader(boolean isFooterPresent, List<ColumnSchema> columnSchemaList, long schemaUpdatedTimeStamp) {
    FileHeader fileHeader = new FileHeader();
    ColumnarFormatVersion version = CarbonProperties.getInstance().getFormatVersion();
    fileHeader.setIs_footer_present(isFooterPresent);
    fileHeader.setColumn_schema(columnSchemaList);
    fileHeader.setVersion(version.number());
    fileHeader.setTime_stamp(schemaUpdatedTimeStamp);
    return fileHeader;
}

Example 2 with FileHeader

use of org.apache.carbondata.format.FileHeader in project carbondata by apache.

the class DataFileFooterConverterV3 method readDataFileFooter.

/**
   * Below method will be used to convert thrift file meta to wrapper file meta
   * This method will read the footer from footer offset present in the data file
   * 1. It will read the header from carbon data file, header starts from 0 offset
   * 2. It will set the stream offset
   * 3. It will read the footer data from file
   * 4. parse the footer to thrift object
   * 5. convert to wrapper object
   *
   * @param tableBlockInfo
   *        table block info
   * @return data file footer
   */
@Override
public DataFileFooter readDataFileFooter(TableBlockInfo tableBlockInfo) throws IOException {
    DataFileFooter dataFileFooter = new DataFileFooter();
    CarbonHeaderReader carbonHeaderReader = new CarbonHeaderReader(tableBlockInfo.getFilePath());
    FileHeader fileHeader = carbonHeaderReader.readHeader();
    CarbonFooterReaderV3 reader = new CarbonFooterReaderV3(tableBlockInfo.getFilePath(), tableBlockInfo.getBlockOffset());
    FileFooter3 footer = reader.readFooterVersion3();
    dataFileFooter.setVersionId(ColumnarFormatVersion.valueOf((short) fileHeader.getVersion()));
    dataFileFooter.setNumberOfRows(footer.getNum_rows());
    dataFileFooter.setSegmentInfo(getSegmentInfo(footer.getSegment_info()));
    dataFileFooter.setSchemaUpdatedTimeStamp(fileHeader.getTime_stamp());
    List<ColumnSchema> columnSchemaList = new ArrayList<ColumnSchema>();
    List<org.apache.carbondata.format.ColumnSchema> table_columns = fileHeader.getColumn_schema();
    for (int i = 0; i < table_columns.size(); i++) {
        columnSchemaList.add(thriftColumnSchmeaToWrapperColumnSchema(table_columns.get(i)));
    }
    dataFileFooter.setColumnInTable(columnSchemaList);
    List<org.apache.carbondata.format.BlockletIndex> leaf_node_indices_Thrift = footer.getBlocklet_index_list();
    List<BlockletIndex> blockletIndexList = new ArrayList<BlockletIndex>();
    for (int i = 0; i < leaf_node_indices_Thrift.size(); i++) {
        BlockletIndex blockletIndex = getBlockletIndex(leaf_node_indices_Thrift.get(i));
        blockletIndexList.add(blockletIndex);
    }
    List<org.apache.carbondata.format.BlockletInfo3> leaf_node_infos_Thrift = footer.getBlocklet_info_list3();
    List<BlockletInfo> blockletInfoList = new ArrayList<BlockletInfo>();
    for (int i = 0; i < leaf_node_infos_Thrift.size(); i++) {
        BlockletInfo blockletInfo = getBlockletInfo(leaf_node_infos_Thrift.get(i), getNumberOfDimensionColumns(columnSchemaList));
        blockletInfo.setBlockletIndex(blockletIndexList.get(i));
        blockletInfoList.add(blockletInfo);
    }
    dataFileFooter.setBlockletList(blockletInfoList);
    dataFileFooter.setBlockletIndex(getBlockletIndexForDataFileFooter(blockletIndexList));
    return dataFileFooter;
}

Example 3 with FileHeader

use of org.apache.carbondata.format.FileHeader in project carbondata by apache.

the class CarbonHeaderReader method readHeader.

/**
   * It reads the metadata in FileFooter thrift object format.
   *
   * @return
   * @throws IOException
   */
public FileHeader readHeader() throws IOException {
    ThriftReader thriftReader = openThriftReader(filePath);
    thriftReader.open();
    FileHeader header = (FileHeader) thriftReader.read();
    thriftReader.close();
    return header;
}