Interface KeyExtractor<V,K>

Type Parameters:
V - value type
K - key type
All Known Subinterfaces:
DoubleVectorKeyExtractor<V>, FloatVectorKeyExtractor<V>, IntegerListDoubleVectorKeyExtractor, IntegerListFloatVectorKeyExtractor, StringDoubleVectorKeyExtractor, StringFloatVectorKeyExtractor, StringMapDoubleVectorKeyExtractor, StringMapFloatVectorKeyExtractor

public interface KeyExtractor<V,K>
Extracts key (e.g. a vector) from value (e.g. String)