FEI Version of the Day
fei_ReverseMapper.cpp
00001 /*
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00004 //             FEI: Finite Element Interface to Linear Solvers
00005 //                  Copyright (2005) Sandia Corporation.
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00009 //
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00011 // modification, are permitted provided that the following conditions are
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00014 // 1. Redistributions of source code must retain the above copyright
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00016 //
00017 // 2. Redistributions in binary form must reproduce the above copyright
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00020 //
00021 // 3. Neither the name of the Corporation nor the names of the
00022 // contributors may be used to endorse or promote products derived from
00023 // this software without specific prior written permission.
00024 //
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00041 */
00042 
00043 
00044 #include <fei_ReverseMapper.hpp>
00045 #include <stdexcept>
00046 #include <sstream>
00047 #include <vector>
00048 #include <fei_VectorSpace.hpp>
00049 #include <snl_fei_RecordCollection.hpp>
00050 
00051 namespace fei {
00052 
00053 ReverseMapper::ReverseMapper(const VectorSpace& vspace)
00054  : eqnmap_()
00055 {
00056   std::vector<int> idTypes;
00057   vspace.getIDTypes(idTypes);
00058 
00059   const std::vector<int>& eqnNumbers = vspace.getEqnNumbers();
00060 
00061   for(size_t idt=0; idt<idTypes.size(); ++idt) {
00062     const snl_fei::RecordCollection* recordcollection = NULL;
00063     int err = vspace.getRecordCollection(idTypes[idt], recordcollection);
00064     if (err != 0) {
00065       throw std::runtime_error("fei::ReverseMapper ERROR, failed to retrieve record-collection.");
00066     }
00067 
00068     const std::vector<fei::Record<int> >&
00069         records = recordcollection->getRecords();
00070 
00071     for(size_t i=0; i<records.size(); ++i) {
00072       const fei::Record<int>* record = &records[i];
00073 
00074       const fei::FieldMask* fm = record->getFieldMask();
00075       const std::vector<int>& fieldIDs = fm->getFieldIDs();
00076       const std::vector<int>& fieldSizes = fm->getFieldSizes();
00077 
00078       int offsetIntoEqnNumbers = record->getOffsetIntoEqnNumbers();
00079 
00080       for(size_t i=0; i<fieldIDs.size(); ++i) {
00081         int offset2 = 0;
00082         fm->getFieldEqnOffset(fieldIDs[i], offset2);
00083 
00084         EqnRecord erec;
00085         erec.IDType = idTypes[idt];
00086         erec.ID = record->getID();
00087         erec.fieldID = fieldIDs[i];
00088 
00089         for(int j=0; j<fieldSizes[i]; ++j) {
00090           erec.offset = j;
00091           erec.global_eqn = eqnNumbers[offsetIntoEqnNumbers+offset2+j];
00092           eqnmap_.insert(std::make_pair(erec.global_eqn, erec));
00093         }
00094       }
00095     }
00096   }
00097 }
00098 
00099 ReverseMapper::~ReverseMapper()
00100 {
00101 }
00102 
00103 EqnRecord ReverseMapper::getEqnRecord(int global_eqn, int option) const
00104 {
00105   std::map<int,EqnRecord>::const_iterator
00106     iter = eqnmap_.find(global_eqn);
00107 
00108   if (iter == eqnmap_.end()) {
00109     if (option == 1) {
00110       EqnRecord erec;
00111       erec.IDType = -1;
00112       erec.ID = -1;
00113       erec.fieldID = -1;
00114       erec.offset = -1;
00115       erec.global_eqn = -1;
00116       return erec;
00117     }
00118 
00119     std::ostringstream osstr;
00120     osstr << "fei::ReverseMapper::getEqnRecord ERROR, global_eqn="<<global_eqn
00121        << " not found.";
00122     throw std::runtime_error(osstr.str());
00123   }
00124 
00125   return iter->second;
00126 }
00127 
00128 }//namespace fei
00129 
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