org.op4j.operators.qualities
Interface ExtractableMapOperator<K,V>

All Known Subinterfaces:

ILevel0BuildingMapOperator<I,K,V>, ILevel0MapOperator<I,K,V>

All Known Implementing Classes:

Level0BuildingMapOperator, Level0MapOperator, Level0MapOperator

public interface ExtractableMapOperator<K,V>

This interface defines methods for extracting keys (discarding values) or values (discarding keys) in operators holding map target objects.

Since:

1.0

Author:

Daniel Fernández

Method Summary

Operator	extractKeys() Extracts only the keys of the map (discarding values) and creates an operator which will hold these keys as a target object of type Set.
Operator	extractValues() Extracts only the values of the map (discarding keys) and creates an operator which will hold these values as a target object of type List.

Method Detail

extractKeys

Operator extractKeys()

Extracts only the keys of the map (discarding values) and creates an operator which will hold these keys as a target object of type Set.

Returns:

an operator with the set of keys as a target object

extractValues

Operator extractValues()

Extracts only the values of the map (discarding keys) and creates an operator which will hold these values as a target object of type List.

Returns:

an operator with the list of values as a target object