inline_rotate_spin_w.cc

Go to the documentation of this file.

/*! \file
 * \brief Inline task to spin rotate to a Dirac basis
 *
 * Spin rotate a named object
 */
 
#include "singleton.h"
#include "funcmap.h"
#include "chromabase.h"
 
#include "meas/inline/abs_inline_measurement_factory.h"
#include "meas/inline/io/named_objmap.h"
#include "meas/inline/hadron/inline_rotate_spin_w.h"
#include "util/ferm/diractodr.h"
 
namespace Chroma 
{ 
  //! Object buffer
  void write(XMLWriter& xml, const std::string& path, const InlineRotateSpinEnv::Params::NamedObject_t& input)
  {
    push(xml, path);
 
    write(xml, "input_id", input.input_id);
    write(xml, "output_id", input.output_id);
    write(xml, "object_type", input.object_type);
 
    pop(xml);
  }
 
 
  //! Object buffer
  void read(XMLReader& xml, const std::string& path, InlineRotateSpinEnv::Params::NamedObject_t& input)
  {
    XMLReader inputtop(xml, path);
 
    read(inputtop, "input_id", input.input_id);
    read(inputtop, "output_id", input.output_id);
    read(inputtop, "object_type", input.object_type);
  }
 
 
  //! IO function std::map environment
  /*! \ingroup inlinehadron */
  namespace RotateSpinObjCallMapEnv
  { 
    // Anonymous namespace
    namespace
    {
      struct DumbDisambiguator {};
 
      //! RotateSpin function std::map
      /*! \ingroup inlinehadron */
      typedef SingletonHolder< 
        FunctionMap<DumbDisambiguator,
                    void,
                    std::string,
                    TYPELIST_2(const std::string&, const std::string&),
                    void (*)(const std::string& output_id, const std::string& input_id),
                    StringFunctionMapError> >
      TheRotateSpinObjFuncMap;
 
 
      //! Transform a wilson-like fermion object. This works only for non-array objects.
      // This only works for a fermion-like object. A propagator needs 2 spin rotations
      void rotateDRtoDiracFerm(const std::string& output_id, const std::string& input_id)
      {
        // Save some typing
        typedef LatticeFermion   T;
 
        // Grab the source
        const T& input_obj = 
          TheNamedObjMap::Instance().getData<T>(input_id);
 
        // The spin basis matrix to go from DR to Dirac
        SpinMatrix rotate_mat(adj(DiracToDRMat()));
 
        XMLReader input_file_xml, input_record_xml;
        TheNamedObjMap::Instance().get(input_id).getFileXML(input_file_xml);
        TheNamedObjMap::Instance().get(input_id).getRecordXML(input_record_xml);
 
        // Create space for the target
        TheNamedObjMap::Instance().create<T>(output_id);
        TheNamedObjMap::Instance().get(output_id).setFileXML(input_file_xml);
        TheNamedObjMap::Instance().get(output_id).setRecordXML(input_record_xml);
 
        // Do the actual rotation
        TheNamedObjMap::Instance().getData<T>(output_id) = rotate_mat * input_obj;
      }
 
      //! Transform a wilson-like fermion object. This works only for non-array objects.
      // This only works for a fermion-like object. A propagator needs 2 spin rotations
      void rotateDiractoDRFerm(const std::string& output_id, const std::string& input_id)
      {
        // Save some typing
        typedef LatticeFermion   T;
 
        // Grab the source
        const T& input_obj = 
          TheNamedObjMap::Instance().getData<T>(input_id);
 
        // The spin basis matrix to go from Dirac to DR
        SpinMatrix rotate_mat(DiracToDRMat());
 
        XMLReader input_file_xml, input_record_xml;
        TheNamedObjMap::Instance().get(input_id).getFileXML(input_file_xml);
        TheNamedObjMap::Instance().get(input_id).getRecordXML(input_record_xml);
 
        // Create space for the target
        TheNamedObjMap::Instance().create<T>(output_id);
        TheNamedObjMap::Instance().get(output_id).setFileXML(input_file_xml);
        TheNamedObjMap::Instance().get(output_id).setRecordXML(input_record_xml);
 
        // Do the actual rotation
        TheNamedObjMap::Instance().getData<T>(output_id) = rotate_mat * input_obj;
      }
 
 
      //! Local registration flag
      bool registered = false;
 
    }  // end namespace RotateSpinCallMap
 
    //! Register all the factories
    bool registerAll() 
    {
      bool success = true; 
      if (! registered)
      {
//      success &= TheRotateSpinObjFuncMap::Instance().registerFunction(std::string("LatticePropagator"), 
//                                                                       rotateSpinObj<LatticePropagator>);
        success &= TheRotateSpinObjFuncMap::Instance().registerFunction(std::string("LatticeFermion:DR-to-Dirac"), 
                                                                        rotateDRtoDiracFerm);
        success &= TheRotateSpinObjFuncMap::Instance().registerFunction(std::string("LatticeFermion:Dirac-to-DR"), 
                                                                        rotateDRtoDiracFerm);
        registered = true;
      }
      return success;
    }
  }  // end CallMap namespace
 
 
  namespace InlineRotateSpinEnv 
  { 
    namespace
    {
      AbsInlineMeasurement* createMeasurement(XMLReader& xml_in, 
                                              const std::string& path) 
      {
        return new InlineMeas(Params(xml_in, path));
      }
 
      //! Local registration flag
      bool registered = false;
    }
 
    const std::string name = "ROTATE_SPIN_NAMED_OBJECT";
 
    //! Register all the factories
    bool registerAll() 
    {
      bool success = true; 
      if (! registered)
      {
        // Rotation env
        success &= RotateSpinObjCallMapEnv::registerAll();
 
        // Inline measurement
        success &= TheInlineMeasurementFactory::Instance().registerObject(name, createMeasurement);
        registered = true;
      }
      return success;
    }
 
 
    // Param stuff
    Params::Params() { frequency = 0; }
 
    Params::Params(XMLReader& xml_in, const std::string& path) 
    {
      try 
      {
        XMLReader paramtop(xml_in, path);
 
        if (paramtop.count("Frequency") == 1)
          read(paramtop, "Frequency", frequency);
        else
          frequency = 1;
 
        // Ids
        read(paramtop, "NamedObject", named_obj);
      }
      catch(const std::string& e) 
      {
        QDPIO::cerr << __func__ << ": caught Exception reading XML: " << e << std::endl;
        QDP_abort(1);
      }
    }
 
 
    void
    Params::writeXML(XMLWriter& xml_out, const std::string& path) 
    {
      push(xml_out, path);
    
      // Ids
      write(xml_out, "NamedObject", named_obj);
 
      pop(xml_out);
    }
 
 
    void 
    InlineMeas::operator()(unsigned long update_no,
                           XMLWriter& xml_out) 
    {
      START_CODE();
 
      push(xml_out, "rotate_spin_object");
      write(xml_out, "update_no", update_no);
 
      QDPIO::cout << name << ": spin rotate an object of type "
                  << params.named_obj.object_type << std::endl;
 
      // Grab the input object
      try
      {
        // Spin rotate the object
        RotateSpinObjCallMapEnv::TheRotateSpinObjFuncMap::Instance().callFunction(params.named_obj.object_type,
                                                                                  params.named_obj.output_id,
                                                                                  params.named_obj.input_id);
      }
      catch (std::bad_cast) 
      {
        QDPIO::cerr << name << ": cast error" 
                    << std::endl;
        QDP_abort(1);
      }
      catch (const std::string& e) 
      {
        QDPIO::cerr << name << ": error message: " << e 
                    << std::endl;
        QDP_abort(1);
      }
    
      QDPIO::cout << name << ": ran successfully" << std::endl;
 
      pop(xml_out);
 
      END_CODE();
    } 
 
  } // namespace InlineRotateSpinEnv 
 
} // namespace Chroma