/**
* Merges the specified date/value point into this builder.
*
* <p>The operator is invoked if the date already exists.
*
* @param date the date to be added
* @param value the value associated with the date
* @param operator the operator to use for merging
* @return this builder
*/
public LocalDateDoubleTimeSeriesBuilder merge(
LocalDate date, double value, DoubleBinaryOperator operator) {
ArgChecker.notNull(date, "date");
ArgChecker.notNull(operator, "operator");
entries.merge(date, value, (a, b) -> operator.applyAsDouble(a, b));
return this;
}
/**
* Merges the specified date/value point into this builder.
*
* <p>The operator is invoked if the date already exists.
*
* @param point the point to be added
* @param operator the operator to use for merging
* @return this builder
*/
public LocalDateDoubleTimeSeriesBuilder merge(
LocalDateDoublePoint point, DoubleBinaryOperator operator) {
ArgChecker.notNull(point, "point");
entries.merge(point.getDate(), point.getValue(), (a, b) -> operator.applyAsDouble(a, b));
return this;
}