@Override
public Set<ComputedValue> execute(
final FunctionExecutionContext executionContext,
final FunctionInputs inputs,
final ComputationTarget target,
final Set<ValueRequirement> desiredValues) {
final Clock snapshotClock = executionContext.getValuationClock();
final ZonedDateTime now = ZonedDateTime.now(snapshotClock);
final Object volatilitySurfaceDataObject = inputs.getValue(_requirement);
if (volatilitySurfaceDataObject == null) {
throw new OpenGammaRuntimeException("Could not get " + _requirement);
}
@SuppressWarnings("unchecked")
final VolatilitySurfaceData<LocalDate, Double> volatilitySurfaceData =
(VolatilitySurfaceData<LocalDate, Double>) volatilitySurfaceDataObject;
final int n = volatilitySurfaceData.getXs().length;
final int m = volatilitySurfaceData.getYs().length;
final DoubleArrayList t = new DoubleArrayList();
final DoubleArrayList k = new DoubleArrayList();
final DoubleArrayList sigma = new DoubleArrayList();
final LocalDate[] xDates = volatilitySurfaceData.getXs();
final Double[] y = volatilitySurfaceData.getYs();
for (int i = 0; i < n; i++) {
final Double time = DateUtils.getDifferenceInYears(now.toLocalDate(), xDates[i]);
for (int j = 0; j < m; j++) {
final Double strike = y[j];
final Double vol = volatilitySurfaceData.getVolatility(xDates[i], y[j]);
if (time != null && strike != null && vol != null) {
t.add(time);
k.add(strike);
sigma.add(vol);
}
}
}
final Surface<Double, Double, Double> surface =
InterpolatedDoublesSurface.from(
t.toDoubleArray(), k.toDoubleArray(), sigma.toDoubleArray(), _interpolator);
final VolatilitySurface volatilitySurface = new VolatilitySurface(surface);
return Collections.singleton(new ComputedValue(_result, volatilitySurface));
}
@Override
public boolean equals(final Object o) {
if (o == null) {
return false;
}
if (!(o instanceof VolatilitySurfaceData)) {
return false;
}
final VolatilitySurfaceData<?, ?> other = (VolatilitySurfaceData<?, ?>) o;
return getDefinitionName().equals(other.getDefinitionName())
&& getSpecificationName().equals(other.getSpecificationName())
&& getTarget().equals(other.getTarget())
&& Arrays.equals(getXs(), other.getXs())
&& Arrays.equals(getYs(), other.getYs())
&& getXLabel().equals(other.getXLabel())
&& getYLabel().equals(other.getYLabel())
&& _values.equals(other._values);
}