Examples with FileMetadata org.apache.drill.exec.store.parquet.metadata.Metadata_V4.FileMetadata used on opensource projects

Example 1 with FileMetadata

use of org.apache.drill.exec.store.parquet.metadata.Metadata_V4.FileMetadata in project drill by apache.

the class Metadata method writeFile.

/**
 * Serialize parquet metadata to json and write to a file.
 *
 * @param parquetMetadata parquet table or directory metadata
 * @param p file path
 * @param fs Drill file system
 * @throws IOException if metadata can't be serialized
 */
private void writeFile(Object parquetMetadata, Path p, FileSystem fs) throws IOException {
    JsonFactory jsonFactory = new JsonFactory();
    jsonFactory.configure(Feature.AUTO_CLOSE_TARGET, false);
    jsonFactory.configure(JsonParser.Feature.AUTO_CLOSE_SOURCE, false);
    ObjectMapper mapper = new ObjectMapper(jsonFactory);
    SimpleModule module = new SimpleModule();
    module.addSerializer(Path.class, new PathSerDe.Se());
    if (parquetMetadata instanceof Metadata_V4.FileMetadata) {
        module.addSerializer(ColumnMetadata_v4.class, new ColumnMetadata_v4.Serializer());
    }
    mapper.registerModule(module);
    OutputStream os = fs.create(p);
    mapper.writerWithDefaultPrettyPrinter().writeValue(os, parquetMetadata);
    os.flush();
    os.close();
}