org.apache.parquet.internal.column.columnindex

Class OffsetIndexBuilder

java.lang.Object

org.apache.parquet.internal.column.columnindex.OffsetIndexBuilder

public class OffsetIndexBuilder
extends Object

Builder implementation to create OffsetIndex objects during writing a parquet file.

Method Summary

Modifier and Type	Method and Description
void	add(int compressedPageSize, long rowCount) Adds the specified parameters to this builder.
void	add(long offset, int compressedPageSize, long firstRowIndex) Adds the specified parameters to this builder.
OffsetIndex	build() Builds the offset index.
OffsetIndex	build(long firstPageOffset) Builds the offset index.
static OffsetIndexBuilder	getBuilder()
static OffsetIndexBuilder	getNoOpBuilder()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getNoOpBuilder

public static OffsetIndexBuilder getNoOpBuilder()

Returns:

a no-op builder that does not collect values and therefore returns null at build(long)

getBuilder

public static OffsetIndexBuilder getBuilder()

Returns:

an OffsetIndexBuilder instance to build an OffsetIndex object

add

public void add(int compressedPageSize,
                long rowCount)

Adds the specified parameters to this builder. Used by the writers to building up OffsetIndex objects to be written to the Parquet file.

Parameters:

compressedPageSize - the size of the page (including header)

rowCount - the number of rows in the page

add

public void add(long offset,
                int compressedPageSize,
                long firstRowIndex)

Adds the specified parameters to this builder. Used by the metadata converter to building up OffsetIndex objects read from the Parquet file.

Parameters:

offset - the offset of the page in the file

compressedPageSize - the size of the page (including header)

firstRowIndex - the index of the first row in the page (within the row group)

build

public OffsetIndex build()

Builds the offset index. Used by the metadata converter to building up OffsetIndex objects read from the Parquet file.

Returns:

the newly created offset index or null if the OffsetIndex object would be empty

build

public OffsetIndex build(long firstPageOffset)

Builds the offset index. Used by the writers to building up OffsetIndex objects to be written to the Parquet file.

Parameters:

firstPageOffset - the actual offset in the file to be used to translate all the collected offsets

Returns:

the newly created offset index or null if the OffsetIndex object would be empty