Module org.apache.arrow.vector

Package org.apache.arrow.vector.dictionary

Class DictionaryProvider.MapDictionaryProvider

java.lang.Object

org.apache.arrow.vector.dictionary.DictionaryProvider.MapDictionaryProvider

All Implemented Interfaces:

AutoCloseable, DictionaryProvider

Enclosing interface:

DictionaryProvider

public static class DictionaryProvider.MapDictionaryProvider
extends Object
implements AutoCloseable, DictionaryProvider

Implementation of DictionaryProvider that is backed by a hash-map.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.arrow.vector.dictionary.DictionaryProvider

DictionaryProvider.MapDictionaryProvider

Constructor Summary

Constructors

Constructor	Description
MapDictionaryProvider(Dictionary... dictionaries)	Constructs a new instance from the given dictionaries.

Method Summary

Modifier and Type	Method	Description
void	close()
void	copyStructureFrom(DictionaryProvider other, BufferAllocator allocator)	Initialize the map structure from another provider, but with empty vectors.
final Set<Long>	getDictionaryIds()	Get all dictionary IDs.
Dictionary	lookup(long id)	Return the dictionary for the given ID.
void	put(Dictionary dictionary)

Methods inherited from class java.lang.Object

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

Constructor Details

MapDictionaryProvider

public MapDictionaryProvider(Dictionary... dictionaries)

Constructs a new instance from the given dictionaries.

Method Details

copyStructureFrom

public void copyStructureFrom(DictionaryProvider other,
 BufferAllocator allocator)

Initialize the map structure from another provider, but with empty vectors.

Parameters:

other - the DictionaryProvider to copy the ids and fields from

allocator - allocator to create the empty vectors

put

public void put(Dictionary dictionary)

getDictionaryIds

public final Set<Long> getDictionaryIds()

Description copied from interface: DictionaryProvider

Get all dictionary IDs.

Specified by:

getDictionaryIds in interface DictionaryProvider

lookup

public Dictionary lookup(long id)

Description copied from interface: DictionaryProvider

Return the dictionary for the given ID.

Specified by:

lookup in interface DictionaryProvider

close

public void close()

Specified by:

close in interface AutoCloseable