public void initialize(MessageType fileSchema,
Map<String, String> fileMetadata,
Path file, List<BlockMetaData> blocks, Configuration configuration)
throws IOException {
ReadSupport.ReadContext readContext = readSupport.init(new InitContext(
configuration, toSetMultiMap(fileMetadata), fileSchema));
this.requestedSchema = readContext.getRequestedSchema();
this.fileSchema = fileSchema;
this.file = file;
this.columnCount = requestedSchema.getPaths().size();
this.recordConverter = readSupport.prepareForRead(
configuration, fileMetadata, fileSchema, readContext);
this.strictTypeChecking = configuration.getBoolean(STRICT_TYPE_CHECKING, true);
List<ColumnDescriptor> columns = requestedSchema.getColumns();
reader = new ParquetFileReader(configuration, file, blocks, columns);
for (BlockMetaData block : blocks) {
total += block.getRowCount();
}
LOG.info("RecordReader initialized will read a total of " + total + " records.");
}