Java tutorial
/** * Copyright (C) 2011 - present by OpenGamma Inc. and the OpenGamma group of companies * * Please see distribution for license. */ package com.opengamma.analytics.financial.instrument.payment; import java.util.Arrays; import javax.time.calendar.ZonedDateTime; import org.apache.commons.lang.Validate; import com.opengamma.analytics.financial.instrument.index.IborIndex; import com.opengamma.analytics.financial.interestrate.payments.derivative.CouponIborRatchet; import com.opengamma.analytics.financial.interestrate.payments.derivative.Payment; import com.opengamma.analytics.financial.schedule.ScheduleCalculator; import com.opengamma.analytics.util.time.TimeCalculator; import com.opengamma.util.money.Currency; import com.opengamma.util.timeseries.DoubleTimeSeries; /** * Class describing a Ratchet on Ibor coupon. The coupon payment depends on the * previous coupon ($C_{i-1}$), the current Ibor fixing ($L_i$). The pay-off is: * $$ * \begin{equation*} * \alpha^M_i C_{i-1} + \beta^M_i L_i + \gamma^M_i * \end{equation*} * $$ * subject to the floor : * $$ * \begin{equation*} * \alpha^F_i C_{i-1} + \beta^F_i L_i + \gamma^F_i * \end{equation*} * $$ * and the cap: * $$ * \begin{equation*} * \alpha^C_i C_{i-1} + \beta^C_i L_i + \gamma^C_i * \end{equation*} * $$ */ public class CouponIborRatchetDefinition extends CouponFloatingDefinition { /** * Ibor-like index on which the coupon fixes. The index currency should be the same as the coupon currency. */ private final IborIndex _index; /** * The start date of the fixing period. */ private final ZonedDateTime _fixingPeriodStartDate; /** * The end date of the fixing period. */ private final ZonedDateTime _fixingPeriodEndDate; /** * The accrual factor (or year fraction) associated to the fixing period in the Index day count convention. */ private final double _fixingPeriodAccrualFactor; /** * The coefficients of the main payment (before floor and cap). Array of length 3. The first coefficient is the previous coupon factor, * the second is the Ibor factor and the third is the additive term. */ private final double[] _mainCoefficients; /** * The coefficients of the floor. Array of length 3. The first coefficient is the previous coupon factor, * the second is the Ibor factor and the third is the additive term. */ private final double[] _floorCoefficients; /** * The coefficients of the cap. Array of length 3. The first coefficient is the previous coupon factor, * the second is the Ibor factor and the third is the additive term. */ private final double[] _capCoefficients; /** * Constructor from all the details. * @param currency The payment currency. * @param paymentDate Coupon payment date. * @param accrualStartDate Start date of the accrual period. * @param accrualEndDate End date of the accrual period. * @param accrualFactor Accrual factor of the accrual period. * @param notional Coupon notional. * @param fixingDate The coupon fixing date. * @param index The coupon Ibor index. Should of the same currency as the payment. * @param mainCoefficients The coefficients of the main payment (before floor and cap). Array of length 3. * @param floorCoefficients The coefficients of the floor. Array of length 3. * @param capCoefficients The coefficients of the cap. Array of length 3. */ public CouponIborRatchetDefinition(final Currency currency, final ZonedDateTime paymentDate, final ZonedDateTime accrualStartDate, final ZonedDateTime accrualEndDate, final double accrualFactor, final double notional, final ZonedDateTime fixingDate, final IborIndex index, final double[] mainCoefficients, final double[] floorCoefficients, final double[] capCoefficients) { super(currency, paymentDate, accrualStartDate, accrualEndDate, accrualFactor, notional, fixingDate); Validate.notNull(index, "index"); Validate.isTrue(currency.equals(index.getCurrency()), "index currency different from payment currency"); _index = index; _fixingPeriodStartDate = ScheduleCalculator.getAdjustedDate(fixingDate, _index.getSpotLag(), _index.getCalendar()); _fixingPeriodEndDate = ScheduleCalculator.getAdjustedDate(_fixingPeriodStartDate, index.getTenor(), index.getBusinessDayConvention(), index.getCalendar(), index.isEndOfMonth()); _fixingPeriodAccrualFactor = index.getDayCount().getDayCountFraction(_fixingPeriodStartDate, _fixingPeriodEndDate); Validate.notNull(mainCoefficients, "Main coefficients"); Validate.notNull(floorCoefficients, "Floor coefficients"); Validate.notNull(capCoefficients, "Cap coefficients"); Validate.isTrue(mainCoefficients.length == 3, "Requires 3 main coefficients"); Validate.isTrue(floorCoefficients.length == 3, "Requires 3 floor coefficients"); Validate.isTrue(capCoefficients.length == 3, "Requires 3 cap coefficients"); _mainCoefficients = mainCoefficients; _floorCoefficients = floorCoefficients; _capCoefficients = capCoefficients; } /** * Gets the Ibor index of the instrument. * @return The index. */ public IborIndex getIndex() { return _index; } /** * Gets the start date of the fixing period. * @return The start date of the fixing period. */ public ZonedDateTime getFixingPeriodStartDate() { return _fixingPeriodStartDate; } /** * Gets the end date of the fixing period. * @return The end date of the fixing period. */ public ZonedDateTime getFixingPeriodEndDate() { return _fixingPeriodEndDate; } /** * Gets the accrual factor (or year fraction) associated to the fixing period in the Index day count convention. * @return The accrual factor. */ public double getFixingPeriodAccrualFactor() { return _fixingPeriodAccrualFactor; } /** * Gets the coefficients of the main payment (before floor and cap). * @return The coefficients of the main payment (before floor and cap). */ public double[] getMainCoefficients() { return _mainCoefficients; } /** * Gets the coefficients of the floor. * @return The coefficients of the floor. */ public double[] getFloorCoefficients() { return _floorCoefficients; } /** * Gets the coefficients of the cap. * @return The coefficients of the cap. */ public double[] getCapCoefficients() { return _capCoefficients; } @Override public int hashCode() { final int prime = 31; int result = super.hashCode(); result = prime * result + Arrays.hashCode(_capCoefficients); result = prime * result + Arrays.hashCode(_floorCoefficients); result = prime * result + Arrays.hashCode(_mainCoefficients); return result; } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (!super.equals(obj)) { return false; } if (getClass() != obj.getClass()) { return false; } CouponIborRatchetDefinition other = (CouponIborRatchetDefinition) obj; if (!Arrays.equals(_capCoefficients, other._capCoefficients)) { return false; } if (!Arrays.equals(_floorCoefficients, other._floorCoefficients)) { return false; } if (!Arrays.equals(_mainCoefficients, other._mainCoefficients)) { return false; } return true; } @Override public CouponIborRatchet toDerivative(final ZonedDateTime date, final String... yieldCurveNames) { Validate.notNull(date, "date"); Validate.isTrue(!date.isAfter(getFixingDate()), "Do not have any fixing data but are asking for a derivative after the fixing date " + getFixingDate() + " " + date); Validate.notNull(yieldCurveNames, "yield curve names"); Validate.isTrue(yieldCurveNames.length > 1, "at least two curves required"); Validate.isTrue(!date.isAfter(getPaymentDate()), "date is after payment date"); final String discountingCurveName = yieldCurveNames[0]; final String forwardCurveName = yieldCurveNames[1]; final double paymentTime = TimeCalculator.getTimeBetween(date, getPaymentDate()); final double fixingTime = TimeCalculator.getTimeBetween(date, getFixingDate()); final double fixingPeriodStartTime = TimeCalculator.getTimeBetween(date, getFixingPeriodStartDate()); final double fixingPeriodEndTime = TimeCalculator.getTimeBetween(date, getFixingPeriodEndDate()); return new CouponIborRatchet(getCurrency(), paymentTime, discountingCurveName, getPaymentYearFraction(), getNotional(), fixingTime, fixingPeriodStartTime, fixingPeriodEndTime, getFixingPeriodAccrualFactor(), forwardCurveName, getIndex(), _mainCoefficients, _floorCoefficients, _capCoefficients); } @Override public Payment toDerivative(ZonedDateTime date, DoubleTimeSeries<ZonedDateTime> data, String... yieldCurveNames) { return null; //TODO: coupon with fixing! } }