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. ValueTransformer for stateful value transformation). If ValueMapper is applied to a key-value pair record the record's key is preserved. If a record's key and value should be modified KeyValueMapper can be used.