org.apache.parquet.internal.column.columnindex

Class ColumnIndexBuilder

java.lang.Object

org.apache.parquet.internal.column.columnindex.ColumnIndexBuilder

public abstract class ColumnIndexBuilder
extends Object

Builder implementation to create ColumnIndex objects.

Method Summary

Modifier and Type	Method and Description
void	add(Statistics<?> stats) Adds the data from the specified statistics to this builder
ColumnIndex	build()
static ColumnIndex	build(PrimitiveType type, BoundaryOrder boundaryOrder, List<Boolean> nullPages, List<Long> nullCounts, List<ByteBuffer> minValues, List<ByteBuffer> maxValues)
static ColumnIndexBuilder	getBuilder(PrimitiveType type, int truncateLength)
long	getMinMaxSize()
static ColumnIndexBuilder	getNoOpBuilder()
int	getPageCount()

Methods inherited from class java.lang.Object

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

Method Detail

getNoOpBuilder

public static ColumnIndexBuilder getNoOpBuilder()

Returns:

a no-op builder that does not collect statistics objects and therefore returns null at build().

getBuilder

public static ColumnIndexBuilder getBuilder(PrimitiveType type,
                                            int truncateLength)

Parameters:

type - the type this builder is to be created for

truncateLength - the length to be used for truncating binary values if possible

Returns:

a ColumnIndexBuilder instance to be used for creating ColumnIndex objects

build

public static ColumnIndex build(PrimitiveType type,
                                BoundaryOrder boundaryOrder,
                                List<Boolean> nullPages,
                                List<Long> nullCounts,
                                List<ByteBuffer> minValues,
                                List<ByteBuffer> maxValues)

Parameters:

type - the primitive type

boundaryOrder - the boundary order of the min/max values

nullPages - the null pages (one boolean value for each page that signifies whether the page consists of nulls entirely)

nullCounts - the number of null values for each page

minValues - the min values for each page

maxValues - the max values for each page

Returns:

the newly created ColumnIndex object based on the specified arguments

add

public void add(Statistics<?> stats)

Adds the data from the specified statistics to this builder

Parameters:

stats - the statistics to be added

build

public ColumnIndex build()

Returns:

the newly created column index or null if the ColumnIndex would be empty

getPageCount

public int getPageCount()

Returns:

the number of pages added so far to this builder

getMinMaxSize

public long getMinMaxSize()

Returns:

the sum of size in bytes of the min/max values added so far to this builder