Package org.apache.kafka.streams.kstream

Interface ValueMapper<V,VR>

Type Parameters:
V - value type
VR - mapped value type
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface ValueMapper<V,VR>
The ValueMapper interface for mapping a value to a new value of arbitrary type. This is a stateless record-by-record operation, i.e, apply(Object) is invoked individually for each record of a stream (cf. FixedKeyProcessor for stateful value transformation). If ValueMapper is applied to a Record the record's key is preserved. If a record's key and value should be modified KeyValueMapper can be used.
See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    VR
    apply(V value)
    Map the given value to a new value.

  • Method Details

    • apply

      VR apply(V value)
      Map the given value to a new value.
      Parameters:
      value - the value to be mapped
      Returns:
      the new value