/**
* Copyright (C) 2009 - present by OpenGamma Inc. and the OpenGamma group of companies
*
* Please see distribution for license.
*/
package com.opengamma.analytics.math.surface;
import org.apache.commons.lang.Validate;
import com.opengamma.analytics.math.function.Function;
/**
* Shifts a {@link FunctionalDoublesSurface}. Only parallel shifts of the surface are supported.
*/
public class FunctionalSurfaceMultiplicativeShiftFunction implements SurfaceShiftFunction<FunctionalDoublesSurface> {
/**
* {@inheritDoc}
*/
@Override
public FunctionalDoublesSurface evaluate(final FunctionalDoublesSurface surface, final double percentage) {
Validate.notNull(surface, "surface");
return evaluate(surface, percentage, "CONSTANT_MULTIPLIER_" + surface.getName());
}
/**
* {@inheritDoc}
*/
@Override
public FunctionalDoublesSurface evaluate(final FunctionalDoublesSurface surface, final double percentage, final String newName) {
Validate.notNull(surface, "surface");
final Function<Double, Double> f = surface.getFunction();
final Function<Double, Double> shiftedFunction = new ShiftedFunction(percentage, f);
return FunctionalDoublesSurface.from(shiftedFunction, newName);
}
private static class ShiftedFunction implements Function<Double, Double> {
private final double _percentage;
private final Function<Double, Double> _f;
public ShiftedFunction(double percentage, Function<Double, Double> f) {
this._percentage = percentage;
this._f = f;
}
@Override
public Double evaluate(final Double... xy) {
return _f.evaluate(xy) * (1 + _percentage);
}
}
/**
* {@inheritDoc}
* @return Not supported
* @throws UnsupportedOperationException
*/
@Override
public FunctionalDoublesSurface evaluate(final FunctionalDoublesSurface surface, final double x, final double y, final double percentage) {
throw new UnsupportedOperationException();
}
/**
* {@inheritDoc}
* @return Not supported
* @throws UnsupportedOperationException
*/
@Override
public FunctionalDoublesSurface evaluate(final FunctionalDoublesSurface surface, final double x, final double y, final double percentage, final String newName) {
throw new UnsupportedOperationException();
}
/**
* {@inheritDoc}
* @return Not supported
* @throws UnsupportedOperationException
*/
@Override
public FunctionalDoublesSurface evaluate(final FunctionalDoublesSurface surface, final double[] xShift, final double[] yShift, final double[] percentage) {
throw new UnsupportedOperationException();
}
/**
* {@inheritDoc}
* @return Not supported
* @throws UnsupportedOperationException
*/
@Override
public FunctionalDoublesSurface evaluate(final FunctionalDoublesSurface surface, final double[] xShift, final double[] yShift, final double[] percentage, final String newName) {
throw new UnsupportedOperationException();
}
}