@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 SecuritySource securitySource = OpenGammaExecutionContext.getSecuritySource(executionContext);
final SwaptionSecurity security = (SwaptionSecurity) target.getSecurity();
final ValueRequirement desiredValue = desiredValues.iterator().next();
final Currency currency = FinancialSecurityUtils.getCurrency(security);
final String surfaceName = desiredValue.getConstraint(ValuePropertyNames.SURFACE);
final String curveCalculationConfigName = desiredValue.getConstraint(ValuePropertyNames.CURVE_CALCULATION_CONFIG);
final ConfigSource configSource = OpenGammaExecutionContext.getConfigSource(executionContext);
final ConfigDBCurveCalculationConfigSource curveCalculationConfigSource = new ConfigDBCurveCalculationConfigSource(configSource);
final MultiCurveCalculationConfig curveCalculationConfig = curveCalculationConfigSource.getConfig(curveCalculationConfigName);
if (curveCalculationConfig == null) {
throw new OpenGammaRuntimeException("Could not find curve calculation configuration named " + curveCalculationConfigName);
}
String[] curveNames = curveCalculationConfig.getYieldCurveNames(); //TODO
if (curveNames.length == 1) {
curveNames = new String[] {curveNames[0], curveNames[0] };
}
final String[] fullCurveNames = new String[curveNames.length];
for (int i = 0; i < curveNames.length; i++) {
fullCurveNames[i] = curveNames[i] + "_" + currency.getCode();
}
final YieldCurveBundle curves = YieldCurveFunctionUtils.getYieldCurves(inputs, curveCalculationConfig);
final Object volatilitySurfaceObject = inputs.getValue(getVolatilityRequirement(surfaceName, currency));
if (volatilitySurfaceObject == null) {
throw new OpenGammaRuntimeException("Could not get volatility surface");
}
final VolatilitySurface volatilitySurface = (VolatilitySurface) volatilitySurfaceObject;
if (!(volatilitySurface.getSurface() instanceof InterpolatedDoublesSurface)) {
throw new OpenGammaRuntimeException("Expecting an InterpolatedDoublesSurface; got " + volatilitySurface.getSurface().getClass());
}
final InstrumentDefinition<?> definition = security.accept(_visitor);
final HistoricalTimeSeriesBundle timeSeries = HistoricalTimeSeriesFunctionUtils.getHistoricalTimeSeriesInputs(executionContext, inputs);
final InstrumentDerivative swaption = _definitionConverter.convert(security, definition, now, fullCurveNames, timeSeries);
final ValueProperties properties = getResultProperties(currency.getCode(), curveCalculationConfigName, surfaceName);
final ValueSpecification spec = new ValueSpecification(_valueRequirementName, target.toSpecification(), properties);
final BlackFlatSwaptionParameters parameters = new BlackFlatSwaptionParameters(volatilitySurface.getSurface(),