org.apache.flink.table.data

Interface MapData

All Known Implementing Classes:

BinaryMapData, ColumnarMapData, GenericMapData

@PublicEvolving
public interface MapData

Base interface of an internal data structure representing data of MapType or MultisetType.

Note: All keys and values of this data structure must be internal data structures. All keys must be of the same type; same for values. See RowData for more information about internal data structures.

Use GenericMapData to construct instances of this interface from regular Java maps.

Method Summary

Modifier and Type	Method and Description
ArrayData	keyArray() Returns an array view of the keys contained in this map.
int	size() Returns the number of key-value mappings in this map.
ArrayData	valueArray() Returns an array view of the values contained in this map.

Method Detail

size

int size()

Returns the number of key-value mappings in this map.

keyArray

ArrayData keyArray()

Returns an array view of the keys contained in this map.

A key-value pair has the same index in the key array and value array.

valueArray

ArrayData valueArray()

Returns an array view of the values contained in this map.

A key-value pair has the same index in the key array and value array.