Package 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
    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 Details

    • 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.