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finmath lib is a Mathematical Finance Library in Java.
It provides algorithms and methodologies related to mathematical finance.
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/*
* (c) Copyright Christian P. Fries, Germany. Contact: [email protected].
*
* Created on 07.09.2013
*/
package net.finmath.time.daycount;
import java.time.LocalDate;
/**
* Interface for various day count conventions.
*
* Classes implementing this interface have to implement the methods
* {@link #getDaycount(LocalDate, LocalDate)} and {@link #getDaycountFraction(LocalDate, LocalDate)}.
*
* Classes implementing these methods then provide day counting and day count fractions for
* a given interval.
*
* @author Christian Fries
* @version 1.0
*/
public interface DayCountConvention {
/**
* Return the number of days between startDate and endDate given the
* specific daycount convention.
*
* @param startDate The start date given as a {@link java.time.LocalDate}.
* @param endDate The end date given as a {@link java.time.LocalDate}.
* @return The number of days within the given period.
*/
double getDaycount(LocalDate startDate, LocalDate endDate);
/**
* Return the daycount fraction (year fraction) corresponding to the period from
* startDate to endDate given the specific daycount convention.
*
* @param startDate The start date given as a {@link java.time.LocalDate}.
* @param endDate The end date given as a {@link java.time.LocalDate}.
* @return The daycount year fraction corresponding to the given period.
*/
double getDaycountFraction(LocalDate startDate, LocalDate endDate);
}