/**
 * Copyright (C) 2012 - present by OpenGamma Inc. and the OpenGamma group of companies
 * 
 * Please see distribution for license.
 */
package com.opengamma.financial.analytics.model.volatility.surface;

import java.util.Collections;
import java.util.Set;

import com.opengamma.engine.ComputationTarget;
import com.opengamma.engine.function.FunctionCompilationContext;
import com.opengamma.engine.target.ComputationTargetType;
import com.opengamma.engine.value.ValueRequirement;
import com.opengamma.engine.value.ValueRequirementNames;
import com.opengamma.financial.analytics.model.InterpolatedDataProperties;
import com.opengamma.financial.property.DefaultPropertyFunction;
import com.opengamma.util.ArgumentChecker;

/**
 * 
 */
public class ForexVolatilitySurfaceDefaultPropertiesFunction extends DefaultPropertyFunction {
  private final String _interpolatorName;
  private final String _leftExtrapolatorName;
  private final String _rightExtrapolatorName;

  public ForexVolatilitySurfaceDefaultPropertiesFunction(final String interpolatorName, final String leftExtrapolatorName, final String rightExtrapolatorName) {
    super(ComputationTargetType.UNORDERED_CURRENCY_PAIR, true);
    ArgumentChecker.notNull(interpolatorName, "interpolator name");
    ArgumentChecker.notNull(leftExtrapolatorName, "left extrapolator name");
    ArgumentChecker.notNull(rightExtrapolatorName, "right extrapolator name");
    _interpolatorName = interpolatorName;
    _leftExtrapolatorName = leftExtrapolatorName;
    _rightExtrapolatorName = rightExtrapolatorName;
  }

  @Override
  protected void getDefaults(final PropertyDefaults defaults) {
    defaults.addValuePropertyName(ValueRequirementNames.STANDARD_VOLATILITY_SURFACE_DATA, InterpolatedDataProperties.X_INTERPOLATOR_NAME);
    defaults.addValuePropertyName(ValueRequirementNames.STANDARD_VOLATILITY_SURFACE_DATA, InterpolatedDataProperties.LEFT_X_EXTRAPOLATOR_NAME);
    defaults.addValuePropertyName(ValueRequirementNames.STANDARD_VOLATILITY_SURFACE_DATA, InterpolatedDataProperties.RIGHT_X_EXTRAPOLATOR_NAME);
  }

  @Override
  protected Set<String> getDefaultValue(final FunctionCompilationContext context, final ComputationTarget target, final ValueRequirement desiredValue, final String propertyName) {
    if (InterpolatedDataProperties.X_INTERPOLATOR_NAME.equals(propertyName)) {
      return Collections.singleton(_interpolatorName);
    }
    if (InterpolatedDataProperties.LEFT_X_EXTRAPOLATOR_NAME.equals(propertyName)) {
      return Collections.singleton(_leftExtrapolatorName);
    }
    if (InterpolatedDataProperties.RIGHT_X_EXTRAPOLATOR_NAME.equals(propertyName)) {
      return Collections.singleton(_rightExtrapolatorName);
    }
    return null;
  }
}