stream.counter.Counter Maven / Gradle / Ivy
package stream.counter;
import java.io.Serializable;
import java.util.Set;
/**
*
* Extension of the {@link PredictionModel} interface to be able to provide
* additional information which seems to be common for count algorithms.
* Currently this is the total number of elements counted so far, available
* through {@link #getTotalCount()} and the "key set" the counting (so far)
* happened for, available through {@link #keySet()}.
*
* @author Benedikt Kulmann, [email protected]
*/
public interface Counter extends Serializable {
/**
* Returns the total number of elements counted so far.
*
* @return the total number of elements counted so far.
*/
public Long getTotalCount();
/**
* Returns the current "key set" of the counting algorithm which means the
* different elements that have occurred so far.
*
* @return The set of different elements which have occurred so far.
*/
public Set keySet();
public void count(T element);
public Long getCount(T element);
}