Serialized Form (Apache Parquet Format Structures 1.15.1 API)

Package org.apache.parquet.format
- Class org.apache.parquet.format.AesGcmCtrV1 extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - aad_prefix
```
ByteBuffer aad_prefix
```
      AAD prefix *
    - aad_file_unique
```
ByteBuffer aad_file_unique
```
      Unique file identifier part of AAD suffix *
    - supply_aad_prefix
```
boolean supply_aad_prefix
```
      In files encrypted with AAD prefix without storing it, readers must supply the prefix *
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.AesGcmV1 extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - aad_prefix
```
ByteBuffer aad_prefix
```
      AAD prefix *
    - aad_file_unique
```
ByteBuffer aad_file_unique
```
      Unique file identifier part of AAD suffix *
    - supply_aad_prefix
```
boolean supply_aad_prefix
```
      In files encrypted with AAD prefix without storing it, readers must supply the prefix *
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.BloomFilterAlgorithm extends org.apache.thrift.TUnion<BloomFilterAlgorithm,BloomFilterAlgorithm._Fields> implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.BloomFilterCompression extends org.apache.thrift.TUnion<BloomFilterCompression,BloomFilterCompression._Fields> implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.BloomFilterHash extends org.apache.thrift.TUnion<BloomFilterHash,BloomFilterHash._Fields> implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.BloomFilterHeader extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - numBytes
```
int numBytes
```
      The size of bitset in bytes *
    - algorithm
```
BloomFilterAlgorithm algorithm
```
      The algorithm for setting bits. *
    - hash
```
BloomFilterHash hash
```
      The hash function used for Bloom filter. *
    - compression
```
BloomFilterCompression compression
```
      The compression used in the Bloom filter *
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.BsonType extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.ColumnChunk extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - file_path
```
String file_path
```
      File where column data is stored. If not set, assumed to be same file as metadata. This path is relative to the current file.
    - file_offset
```
long file_offset
```
      Byte offset in file_path to the ColumnMetaData *
    - meta_data
```
ColumnMetaData meta_data
```
      Column metadata for this chunk. This is the same content as what is at file_path/file_offset. Having it here has it replicated in the file metadata.
    - offset_index_offset
```
long offset_index_offset
```
      File offset of ColumnChunk's OffsetIndex *
    - offset_index_length
```
int offset_index_length
```
      Size of ColumnChunk's OffsetIndex, in bytes *
    - column_index_offset
```
long column_index_offset
```
      File offset of ColumnChunk's ColumnIndex *
    - column_index_length
```
int column_index_length
```
      Size of ColumnChunk's ColumnIndex, in bytes *
    - crypto_metadata
```
ColumnCryptoMetaData crypto_metadata
```
      Crypto metadata of encrypted columns *
    - encrypted_column_metadata
```
ByteBuffer encrypted_column_metadata
```
      Encrypted column metadata for this chunk *
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.ColumnCryptoMetaData extends org.apache.thrift.TUnion<ColumnCryptoMetaData,ColumnCryptoMetaData._Fields> implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.ColumnIndex extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - null_pages
```
List<E> null_pages
```
      A list of Boolean values to determine the validity of the corresponding min and max values. If true, a page contains only null values, and writers have to set the corresponding entries in min_values and max_values to byte[0], so that all lists have the same length. If false, the corresponding entries in min_values and max_values must be valid.
    - min_values
```
List<E> min_values
```
      Two lists containing lower and upper bounds for the values of each page determined by the ColumnOrder of the column. These may be the actual minimum and maximum values found on a page, but can also be (more compact) values that do not exist on a page. For example, instead of storing ""Blart Versenwald III", a writer may set min_values[i]="B", max_values[i]="C". Such more compact values must still be valid values within the column's logical type. Readers must make sure that list entries are populated before using them by inspecting null_pages.
    - max_values
```
List<E> max_values
```
    - boundary_order
```
BoundaryOrder boundary_order
```
      Stores whether both min_values and max_values are ordered and if so, in which direction. This allows readers to perform binary searches in both lists. Readers cannot assume that max_values[i] <= min_values[i+1], even if the lists are ordered.
      
      See Also:
      
      BoundaryOrder
    - null_counts
```
List<E> null_counts
```
      A list containing the number of null values for each page *
    - repetition_level_histograms
```
List<E> repetition_level_histograms
```
      Contains repetition level histograms for each page concatenated together. The repetition_level_histogram field on SizeStatistics contains more details. When present the length should always be (number of pages * (max_repetition_level + 1)) elements. Element 0 is the first element of the histogram for the first page. Element (max_repetition_level + 1) is the first element of the histogram for the second page.
    - definition_level_histograms
```
List<E> definition_level_histograms
```
      Same as repetition_level_histograms except for definitions levels.
- Class org.apache.parquet.format.ColumnMetaData extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - type
```
Type type
```
      Type of this column *
      
      See Also:
      
      Type
    - encodings
```
List<E> encodings
```
      Set of all encodings used for this column. The purpose is to validate whether we can decode those pages. *
    - path_in_schema
```
List<E> path_in_schema
```
      Path in schema *
    - codec
```
CompressionCodec codec
```
      Compression codec *
      
      See Also:
      
      CompressionCodec
    - num_values
```
long num_values
```
      Number of values in this column *
    - total_uncompressed_size
```
long total_uncompressed_size
```
      total byte size of all uncompressed pages in this column chunk (including the headers) *
    - total_compressed_size
```
long total_compressed_size
```
      total byte size of all compressed, and potentially encrypted, pages in this column chunk (including the headers) *
    - key_value_metadata
```
List<E> key_value_metadata
```
      Optional key/value metadata *
    - data_page_offset
```
long data_page_offset
```
      Byte offset from beginning of file to first data page *
    - index_page_offset
```
long index_page_offset
```
      Byte offset from beginning of file to root index page *
    - dictionary_page_offset
```
long dictionary_page_offset
```
      Byte offset from the beginning of file to first (only) dictionary page *
    - statistics
```
Statistics statistics
```
      optional statistics for this column chunk
    - encoding_stats
```
List<E> encoding_stats
```
      Set of all encodings used for pages in this column chunk. This information can be used to determine if all data pages are dictionary encoded for example *
    - bloom_filter_offset
```
long bloom_filter_offset
```
      Byte offset from beginning of file to Bloom filter data. *
    - bloom_filter_length
```
int bloom_filter_length
```
      Size of Bloom filter data including the serialized header, in bytes. Added in 2.10 so readers may not read this field from old files and it can be obtained after the BloomFilterHeader has been deserialized. Writers should write this field so readers can read the bloom filter in a single I/O.
    - size_statistics
```
SizeStatistics size_statistics
```
      Optional statistics to help estimate total memory when converted to in-memory representations. The histograms contained in these statistics can also be useful in some cases for more fine-grained nullability/list length filter pushdown.
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.ColumnOrder extends org.apache.thrift.TUnion<ColumnOrder,ColumnOrder._Fields> implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.DataPageHeader extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - num_values
```
int num_values
```
      Number of values, including NULLs, in this data page. *
    - encoding
```
Encoding encoding
```
      Encoding used for this data page *
      
      See Also:
      
      Encoding
    - definition_level_encoding
```
Encoding definition_level_encoding
```
      Encoding used for definition levels *
      
      See Also:
      
      Encoding
    - repetition_level_encoding
```
Encoding repetition_level_encoding
```
      Encoding used for repetition levels *
      
      See Also:
      
      Encoding
    - statistics
```
Statistics statistics
```
      Optional statistics for the data in this page *
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.DataPageHeaderV2 extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - num_values
```
int num_values
```
      Number of values, including NULLs, in this data page. *
    - num_nulls
```
int num_nulls
```
      Number of NULL values, in this data page. Number of non-null = num_values - num_nulls which is also the number of values in the data section *
    - num_rows
```
int num_rows
```
      Number of rows in this data page. which means pages change on record boundaries (r = 0) *
    - encoding
```
Encoding encoding
```
      Encoding used for data in this page *
      
      See Also:
      
      Encoding
    - definition_levels_byte_length
```
int definition_levels_byte_length
```
      Length of the definition levels
    - repetition_levels_byte_length
```
int repetition_levels_byte_length
```
      Length of the repetition levels
    - is_compressed
```
boolean is_compressed
```
      Whether the values are compressed. Which means the section of the page between definition_levels_byte_length + repetition_levels_byte_length + 1 and compressed_page_size (included) is compressed with the compression_codec. If missing it is considered compressed
    - statistics
```
Statistics statistics
```
      Optional statistics for the data in this page *
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.DateType extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.DecimalType extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - scale
```
int scale
```
    - precision
```
int precision
```
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.DictionaryPageHeader extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - num_values
```
int num_values
```
      Number of values in the dictionary *
    - encoding
```
Encoding encoding
```
      Encoding using this dictionary page *
      
      See Also:
      
      Encoding
    - is_sorted
```
boolean is_sorted
```
      If true, the entries in the dictionary are sorted in ascending order *
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.EncryptionAlgorithm extends org.apache.thrift.TUnion<EncryptionAlgorithm,EncryptionAlgorithm._Fields> implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.EncryptionWithColumnKey extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - path_in_schema
```
List<E> path_in_schema
```
      Column path in schema *
    - key_metadata
```
ByteBuffer key_metadata
```
      Retrieval metadata of column encryption key *
- Class org.apache.parquet.format.EncryptionWithFooterKey extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.EnumType extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.FileCryptoMetaData extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - encryption_algorithm
```
EncryptionAlgorithm encryption_algorithm
```
      Encryption algorithm. This field is only used for files with encrypted footer. Files with plaintext footer store algorithm id inside footer (FileMetaData structure).
    - key_metadata
```
ByteBuffer key_metadata
```
      Retrieval metadata of key used for encryption of footer, and (possibly) columns *
- Class org.apache.parquet.format.FileMetaData extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - version
```
int version
```
      Version of this file *
    - schema
```
List<E> schema
```
      Parquet schema for this file. This schema contains metadata for all the columns. The schema is represented as a tree with a single root. The nodes of the tree are flattened to a list by doing a depth-first traversal. The column metadata contains the path in the schema for that column which can be used to map columns to nodes in the schema. The first element is the root *
    - num_rows
```
long num_rows
```
      Number of rows in this file *
    - row_groups
```
List<E> row_groups
```
      Row groups in this file *
    - key_value_metadata
```
List<E> key_value_metadata
```
      Optional key/value metadata *
    - created_by
```
String created_by
```
      String for application that wrote this file. This should be in the format version (build ). e.g. impala version 1.0 (build 6cf94d29b2b7115df4de2c06e2ab4326d721eb55)
    - column_orders
```
List<E> column_orders
```
      Sort order used for the min_value and max_value fields in the Statistics objects and the min_values and max_values fields in the ColumnIndex objects of each column in this file. Sort orders are listed in the order matching the columns in the schema. The indexes are not necessary the same though, because only leaf nodes of the schema are represented in the list of sort orders. Without column_orders, the meaning of the min_value and max_value fields in the Statistics object and the ColumnIndex object is undefined. To ensure well-defined behaviour, if these fields are written to a Parquet file, column_orders must be written as well. The obsolete min and max fields in the Statistics object are always sorted by signed comparison regardless of column_orders.
    - encryption_algorithm
```
EncryptionAlgorithm encryption_algorithm
```
      Encryption algorithm. This field is set only in encrypted files with plaintext footer. Files with encrypted footer store algorithm id in FileCryptoMetaData structure.
    - footer_signing_key_metadata
```
ByteBuffer footer_signing_key_metadata
```
      Retrieval metadata of key used for signing the footer. Used only in encrypted files with plaintext footer.
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.Float16Type extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.IndexPageHeader extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.IntType extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - bitWidth
```
byte bitWidth
```
    - isSigned
```
boolean isSigned
```
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.InvalidParquetMetadataException extends RuntimeException implements Serializable
- Class org.apache.parquet.format.JsonType extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.KeyValue extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - key
```
String key
```
    - value
```
String value
```
- Class org.apache.parquet.format.ListType extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.LogicalType extends org.apache.thrift.TUnion<LogicalType,LogicalType._Fields> implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.MapType extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.MicroSeconds extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.MilliSeconds extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.NanoSeconds extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.NullType extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.OffsetIndex extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - page_locations
```
List<E> page_locations
```
      PageLocations, ordered by increasing PageLocation.offset. It is required that page_locations[i].first_row_index < page_locations[i+1].first_row_index.
    - unencoded_byte_array_data_bytes
```
List<E> unencoded_byte_array_data_bytes
```
      Unencoded/uncompressed size for BYTE_ARRAY types. See documention for unencoded_byte_array_data_bytes in SizeStatistics for more details on this field.
- Class org.apache.parquet.format.PageEncodingStats extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - page_type
```
PageType page_type
```
      the page type (data/dic/...) *
      
      See Also:
      
      PageType
    - encoding
```
Encoding encoding
```
      encoding of the page *
      
      See Also:
      
      Encoding
    - count
```
int count
```
      number of pages of this type with this encoding *
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.PageHeader extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - type
```
PageType type
```
      the type of the page: indicates which of the *_header fields is set *
      
      See Also:
      
      PageType
    - uncompressed_page_size
```
int uncompressed_page_size
```
      Uncompressed page size in bytes (not including this header) *
    - compressed_page_size
```
int compressed_page_size
```
      Compressed (and potentially encrypted) page size in bytes, not including this header *
    - crc
```
int crc
```
      The 32-bit CRC checksum for the page, to be be calculated as follows: - The standard CRC32 algorithm is used (with polynomial 0x04C11DB7, the same as in e.g. GZip). - All page types can have a CRC (v1 and v2 data pages, dictionary pages, etc.). - The CRC is computed on the serialization binary representation of the page (as written to disk), excluding the page header. For example, for v1 data pages, the CRC is computed on the concatenation of repetition levels, definition levels and column values (optionally compressed, optionally encrypted). - The CRC computation therefore takes place after any compression and encryption steps, if any. If enabled, this allows for disabling checksumming in HDFS if only a few pages need to be read.
    - data_page_header
```
DataPageHeader data_page_header
```
    - index_page_header
```
IndexPageHeader index_page_header
```
    - dictionary_page_header
```
DictionaryPageHeader dictionary_page_header
```
    - data_page_header_v2
```
DataPageHeaderV2 data_page_header_v2
```
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.PageLocation extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - offset
```
long offset
```
      Offset of the page in the file *
    - compressed_page_size
```
int compressed_page_size
```
      Size of the page, including header. Sum of compressed_page_size and header length
    - first_row_index
```
long first_row_index
```
      Index within the RowGroup of the first row of the page; this means pages change on record boundaries (r = 0).
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.RowGroup extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - columns
```
List<E> columns
```
      Metadata for each column chunk in this row group. This list must have the same order as the SchemaElement list in FileMetaData.
    - total_byte_size
```
long total_byte_size
```
      Total byte size of all the uncompressed column data in this row group *
    - num_rows
```
long num_rows
```
      Number of rows in this row group *
    - sorting_columns
```
List<E> sorting_columns
```
      If set, specifies a sort ordering of the rows in this RowGroup. The sorting columns can be a subset of all the columns.
    - file_offset
```
long file_offset
```
      Byte offset from beginning of file to first page (data or dictionary) in this row group *
    - total_compressed_size
```
long total_compressed_size
```
      Total byte size of all compressed (and potentially encrypted) column data in this row group *
    - ordinal
```
short ordinal
```
      Row group ordinal in the file *
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.SchemaElement extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - type
```
Type type
```
      Data type for this field. Not set if the current element is a non-leaf node
      
      See Also:
      
      Type
    - type_length
```
int type_length
```
      If type is FIXED_LEN_BYTE_ARRAY, this is the byte length of the values. Otherwise, if specified, this is the maximum bit length to store any of the values. (e.g. a low cardinality INT col could have this set to 3). Note that this is in the schema, and therefore fixed for the entire file.
    - repetition_type
```
FieldRepetitionType repetition_type
```
      repetition of the field. The root of the schema does not have a repetition_type. All other nodes must have one
      
      See Also:
      
      FieldRepetitionType
    - name
```
String name
```
      Name of the field in the schema
    - num_children
```
int num_children
```
      Nested fields. Since thrift does not support nested fields, the nesting is flattened to a single list by a depth-first traversal. The children count is used to construct the nested relationship. This field is not set when the element is a primitive type
    - converted_type
```
ConvertedType converted_type
```
      DEPRECATED: When the schema is the result of a conversion from another model. Used to record the original type to help with cross conversion. This is superseded by logicalType.
      
      See Also:
      
      ConvertedType
    - scale
```
int scale
```
      DEPRECATED: Used when this column contains decimal data. See the DECIMAL converted type for more details. This is superseded by using the DecimalType annotation in logicalType.
    - precision
```
int precision
```
    - field_id
```
int field_id
```
      When the original schema supports field ids, this will save the original field id in the parquet schema
    - logicalType
```
LogicalType logicalType
```
      The logical type of this SchemaElement LogicalType replaces ConvertedType, but ConvertedType is still required for some logical types to ensure forward-compatibility in format v1.
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.SizeStatistics extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - unencoded_byte_array_data_bytes
```
long unencoded_byte_array_data_bytes
```
      The number of physical bytes stored for BYTE_ARRAY data values assuming no encoding. This is exclusive of the bytes needed to store the length of each byte array. In other words, this field is equivalent to the `(size of PLAIN-ENCODING the byte array values) - (4 bytes * number of values written)`. To determine unencoded sizes of other types readers can use schema information multiplied by the number of non-null and null values. The number of null/non-null values can be inferred from the histograms below. For example, if a column chunk is dictionary-encoded with dictionary ["a", "bc", "cde"], and a data page contains the indices [0, 0, 1, 2], then this value for that data page should be 7 (1 + 1 + 2 + 3). This field should only be set for types that use BYTE_ARRAY as their physical type.
    - repetition_level_histogram
```
List<E> repetition_level_histogram
```
      When present, there is expected to be one element corresponding to each repetition (i.e. size=max repetition_level+1) where each element represents the number of times the repetition level was observed in the data. This field may be omitted if max_repetition_level is 0 without loss of information.
    - definition_level_histogram
```
List<E> definition_level_histogram
```
      Same as repetition_level_histogram except for definition levels. This field may be omitted if max_definition_level is 0 or 1 without loss of information.
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.SortingColumn extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - column_idx
```
int column_idx
```
      The column index (in this row group) *
    - descending
```
boolean descending
```
      If true, indicates this column is sorted in descending order. *
    - nulls_first
```
boolean nulls_first
```
      If true, nulls will come before non-null values, otherwise, nulls go at the end.
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.SplitBlockAlgorithm extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.Statistics extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - max
```
ByteBuffer max
```
      DEPRECATED: min and max value of the column. Use min_value and max_value. Values are encoded using PLAIN encoding, except that variable-length byte arrays do not include a length prefix. These fields encode min and max values determined by signed comparison only. New files should use the correct order for a column's logical type and store the values in the min_value and max_value fields. To support older readers, these may be set when the column order is signed.
    - min
```
ByteBuffer min
```
    - null_count
```
long null_count
```
      count of null value in the column
    - distinct_count
```
long distinct_count
```
      count of distinct values occurring
    - max_value
```
ByteBuffer max_value
```
      Lower and upper bound values for the column, determined by its ColumnOrder. These may be the actual minimum and maximum values found on a page or column chunk, but can also be (more compact) values that do not exist on a page or column chunk. For example, instead of storing "Blart Versenwald III", a writer may set min_value="B", max_value="C". Such more compact values must still be valid values within the column's logical type. Values are encoded using PLAIN encoding, except that variable-length byte arrays do not include a length prefix.
    - min_value
```
ByteBuffer min_value
```
    - is_max_value_exact
```
boolean is_max_value_exact
```
      If true, max_value is the actual maximum value for a column
    - is_min_value_exact
```
boolean is_min_value_exact
```
      If true, min_value is the actual minimum value for a column
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.StringType extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.TimestampType extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - isAdjustedToUTC
```
boolean isAdjustedToUTC
```
    - unit
```
TimeUnit unit
```
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.TimeType extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
  - Serialized Fields
    - isAdjustedToUTC
```
boolean isAdjustedToUTC
```
    - unit
```
TimeUnit unit
```
    - __isset_bitfield
```
byte __isset_bitfield
```
- Class org.apache.parquet.format.TimeUnit extends org.apache.thrift.TUnion<TimeUnit,TimeUnit._Fields> implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.TypeDefinedOrder extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.Uncompressed extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.UUIDType extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException
- Class org.apache.parquet.format.XxHash extends Object implements Serializable
  - Serialization Methods
    - readObject
```
private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException
```
      Throws:
      
      IOException
      
      ClassNotFoundException
    - writeObject
```
private void writeObject(ObjectOutputStream out)
                  throws IOException
```
      Throws:
      
      IOException

Serialized Form

Package org.apache.parquet.format

Class org.apache.parquet.format.AesGcmCtrV1 extends Object implements Serializable

Serialization Methods

readObject

writeObject

Serialized Fields

aad_prefix

aad_file_unique

supply_aad_prefix

__isset_bitfield

Class org.apache.parquet.format.AesGcmV1 extends Object implements Serializable

Serialization Methods

readObject

writeObject

Serialized Fields

aad_prefix

aad_file_unique

supply_aad_prefix

__isset_bitfield

Class org.apache.parquet.format.BloomFilterAlgorithm extends org.apache.thrift.TUnion<BloomFilterAlgorithm,BloomFilterAlgorithm._Fields> implements Serializable

Serialization Methods

readObject

writeObject

Class org.apache.parquet.format.BloomFilterCompression extends org.apache.thrift.TUnion<BloomFilterCompression,BloomFilterCompression._Fields> implements Serializable

Serialization Methods

readObject

writeObject

Class org.apache.parquet.format.BloomFilterHash extends org.apache.thrift.TUnion<BloomFilterHash,BloomFilterHash._Fields> implements Serializable

Serialization Methods

readObject

writeObject

Class org.apache.parquet.format.BloomFilterHeader extends Object implements Serializable

Serialization Methods

readObject

writeObject

Serialized Fields

numBytes

algorithm

hash

compression

__isset_bitfield

Class org.apache.parquet.format.BsonType extends Object implements Serializable

Serialization Methods

readObject

writeObject

Class org.apache.parquet.format.ColumnChunk extends Object implements Serializable

Serialization Methods

readObject

writeObject

Serialized Fields

file_path

file_offset

meta_data

offset_index_offset

offset_index_length

column_index_offset

column_index_length

crypto_metadata

encrypted_column_metadata

__isset_bitfield

Class org.apache.parquet.format.ColumnCryptoMetaData extends org.apache.thrift.TUnion<ColumnCryptoMetaData,ColumnCryptoMetaData._Fields> implements Serializable

Serialization Methods

readObject

writeObject

Class org.apache.parquet.format.ColumnIndex extends Object implements Serializable

Serialization Methods

readObject

writeObject

Serialized Fields

null_pages

min_values

max_values

boundary_order

null_counts

repetition_level_histograms

definition_level_histograms

Class org.apache.parquet.format.ColumnMetaData extends Object implements Serializable

Serialization Methods

readObject