Record Class FileMetaData

java.lang.Object

java.lang.Record

dev.hardwood.metadata.FileMetaData

public record FileMetaData(int version, List<SchemaElement> schema, long numRows, List<RowGroup> rowGroups, String createdBy)
extends Record

Top-level file metadata for a Parquet file.

Constructor Summary

Constructors

Constructor	Description
FileMetaData(int version, List<SchemaElement> schema, long numRows, List<RowGroup> rowGroups, String createdBy)	Creates an instance of a FileMetaData record class.

Method Summary

Modifier and Type	Method	Description
String	createdBy()	Returns the value of the createdBy record component.
final boolean	equals(Object o)	Indicates whether some other object is "equal to" this one.
final int	hashCode()	Returns a hash code value for this object.
long	numRows()	Returns the value of the numRows record component.
List<RowGroup>	rowGroups()	Returns the value of the rowGroups record component.
List<SchemaElement>	schema()	Returns the value of the schema record component.
final String	toString()	Returns a string representation of this record class.
int	version()	Returns the value of the version record component.

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

FileMetaData

public FileMetaData(int version,
 List<SchemaElement> schema,
 long numRows,
 List<RowGroup> rowGroups,
 String createdBy)

Creates an instance of a FileMetaData record class.

Parameters:

version - the value for the version record component

schema - the value for the schema record component

numRows - the value for the numRows record component

rowGroups - the value for the rowGroups record component

createdBy - the value for the createdBy record component

Method Details

toString

public final String toString()

Returns a string representation of this record class. The representation contains the name of the class, followed by the name and value of each of the record components.

Specified by:

toString in class Record

Returns:

a string representation of this object

hashCode

public final int hashCode()

Returns a hash code value for this object. The value is derived from the hash code of each of the record components.

Specified by:

hashCode in class Record

Returns:

a hash code value for this object

equals

public final boolean equals(Object o)

Indicates whether some other object is "equal to" this one. The objects are equal if the other object is of the same class and if all the record components are equal. Reference components are compared with Objects::equals(Object,Object); primitive components are compared with the compare method from their corresponding wrapper classes.

Specified by:

equals in class Record

Parameters:

o - the object with which to compare

Returns:

true if this object is the same as the o argument; false otherwise.

version

public int version()

Returns the value of the version record component.

Returns:

the value of the version record component

schema

public List<SchemaElement> schema()

Returns the value of the schema record component.

Returns:

the value of the schema record component

numRows

public long numRows()

Returns the value of the numRows record component.

Returns:

the value of the numRows record component

rowGroups

public List<RowGroup> rowGroups()

Returns the value of the rowGroups record component.

Returns:

the value of the rowGroups record component

createdBy

public String createdBy()

Returns the value of the createdBy record component.

Returns:

the value of the createdBy record component