VariableProvider.java

package kernel.views.variables;

import exceptions.NegativeDurationException;

import java.time.Duration;
import java.util.List;

public interface VariableProvider<T extends Variable> {

    List<T> getValues();

    Duration getLengthOfHistory();

    Integer getNumberOfDataPoints();

    Boolean isProvidingVariables();

    void setNumberOfDataPoints(Integer numberOfDataPoints);

    void clearHistory();

    Duration getPollingInterval();

    void setPollingInterval(Duration pollingInterval) throws
            NegativeDurationException;

    void addOnChangeListener(VariableChangeEventListener<T> listener);

    void removeOnChangeListener(VariableChangeEventListener<T> listener);
}