Panzer_Product_impl.hpp

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#ifndef PANZER_PRODUCT_IMPL_HPP
#define PANZER_PRODUCT_IMPL_HPP

#include <cstddef>
#include <string>
#include <vector>

namespace panzer {

//**********************************************************************
template<typename EvalT, typename Traits>
Product<EvalT, Traits>::
Product(
  const Teuchos::ParameterList& p)
  : scaling(1.0)
{
  std::string product_name = p.get<std::string>("Product Name");
  Teuchos::RCP<std::vector<std::string> > value_names = 
    p.get<Teuchos::RCP<std::vector<std::string> > >("Values Names");
  Teuchos::RCP<PHX::DataLayout> data_layout = 
    p.get< Teuchos::RCP<PHX::DataLayout> >("Data Layout");

  if(p.isType<double>("Scaling"))
    scaling =  p.get<double>("Scaling");
  
  product = PHX::MDField<ScalarT>(product_name, data_layout);
  
  this->addEvaluatedField(product);
 
  values.resize(value_names->size());
  for (std::size_t i=0; i < value_names->size(); ++i) {
    values[i] = PHX::MDField<const ScalarT>( (*value_names)[i], data_layout);
    this->addDependentField(values[i]);
  }
 
  std::string n = "Product Evaluator";
  this->setName(n);
}

//**********************************************************************
template<typename EvalT, typename Traits>
void
Product<EvalT, Traits>::
evaluateFields(
  typename Traits::EvalData  /* workset */)
{ 
    product.deep_copy(ScalarT(scaling));
    for (std::size_t j = 0; j < values.size(); ++j)
      product.V_Multiply(values[j]);   

}

//**********************************************************************

}

#endif