/**
 * Copyright (C) 2009 - present by OpenGamma Inc. and the OpenGamma group of companies
 *
 * Please see distribution for license.
 */
package com.opengamma.financial.analytics.model.bond;

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

import org.apache.commons.lang.Validate;

import com.opengamma.OpenGammaRuntimeException;
import com.opengamma.engine.ComputationTarget;
import com.opengamma.engine.ComputationTargetSpecification;
import com.opengamma.engine.function.AbstractFunction.NonCompiledInvoker;
import com.opengamma.engine.function.FunctionCompilationContext;
import com.opengamma.engine.function.FunctionExecutionContext;
import com.opengamma.engine.function.FunctionInputs;
import com.opengamma.engine.target.ComputationTargetType;
import com.opengamma.engine.value.ComputedValue;
import com.opengamma.engine.value.ValueRequirement;
import com.opengamma.financial.security.FinancialSecurityTypes;
import com.opengamma.financial.security.bond.BondSecurity;

/**
 * 
 */
public abstract class BondMarketDataFunction extends NonCompiledInvoker {

  private final String _requirementName;

  public BondMarketDataFunction(final String requirementName) {
    Validate.notNull(requirementName, "requirementName");
    _requirementName = requirementName;
  }

  @Override
  public Set<ComputedValue> execute(final FunctionExecutionContext executionContext, final FunctionInputs inputs,
      final ComputationTarget target, final Set<ValueRequirement> desiredValues) {
    final BondSecurity security = target.getValue(FinancialSecurityTypes.BOND_SECURITY);
    final Object value = inputs.getValue(_requirementName);
    if (value == null) {
      throw new OpenGammaRuntimeException("Could not get " + _requirementName);
    }
    return getComputedValues(executionContext, (Double) value, security, target.toSpecification());
  }

  @Override
  public Set<ValueRequirement> getRequirements(final FunctionCompilationContext context,
      final ComputationTarget target, final ValueRequirement desiredValue) {
    return Collections.singleton(new ValueRequirement(_requirementName, target.toSpecification()));
  }

  @Override
  public ComputationTargetType getTargetType() {
    return FinancialSecurityTypes.BOND_SECURITY;
  }

  protected abstract Set<ComputedValue> getComputedValues(final FunctionExecutionContext context, final double value, final BondSecurity security, final ComputationTargetSpecification target);

}