/*!
* \brief Read individual from a XML file. If several individuals are in file, read
* first tagged occurence of individual.
* \param inFileName Filename to read individual from.
* \param ioSystem Evolutionary system to read individual.
* \return True if an individual was found and read from file, false if nothing was found.
*/
bool Individual::readFromFile(std::string inFileName, System& ioSystem)
{
Beagle_StackTraceBeginM();
std::ifstream lIFS(inFileName.c_str());
PACC::XML::Document lParser(lIFS, inFileName);
lIFS.close();
PACC::XML::ConstFinder lIndivFinder(lParser.getFirstDataTag());
PACC::XML::ConstIterator lIndivTag = lIndivFinder.find("//Individual");
if(!lIndivTag) return false;
Context::Alloc::Handle lContextAlloc =
castHandleT<Context::Alloc>(ioSystem.getFactory().getConceptAllocator("Context"));
Context::Handle lContext = castHandleT<Context>(lContextAlloc->allocate());
lContext->setSystemHandle(&ioSystem);
lContext->setIndividualHandle(this);
lContext->setIndividualIndex(0);
readWithContext(lIndivTag, *lContext);
return true;
Beagle_StackTraceEndM();
}
/*!
* \brief Test the fitness of a given individual.
* \param inIndividual Handle to the individual to test.
* \param ioSystem Handle to the system to use to test the individual.
* \par Note:
* This method is provided as a mean to test some individuals after an evolution.
*/
Fitness::Handle Beagle::MPI::EvaluationOp::test(Individual::Handle inIndividual, System::Handle ioSystem)
{
Beagle_LogInfoM(
ioSystem->getLogger(),
"evaluation", "Beagle::MPIEvaluationOp",
std::string("Testing the following individual: ")+inIndividual->serialize()
);
Context::Alloc::Handle lContextAlloc =
castHandleT<Context::Alloc>(ioSystem->getContextAllocatorHandle());
Context::Handle lContext = castHandleT<Context>(lContextAlloc->allocate());
lContext->setSystemHandle(ioSystem);
lContext->setIndividualHandle(inIndividual);
Fitness::Handle lFitness = evaluate(*inIndividual, *lContext);
Beagle_LogInfoM(
ioSystem->getLogger(),
"evaluation", "Beagle::MPIEvaluationOp",
std::string("New fitness of the individual: ")+lFitness->serialize()
);
return lFitness;
}
/*!
* \brief Apply the evaluation process on the invalid individuals of the deme.
* \param ioDeme Deme to process.
* \param ioContext Context of the evolution.
*/
void EvaluationMultipleOp::operate(Deme& ioDeme, Context& ioContext)
{
Beagle_StackTraceBeginM();
Beagle_LogTraceM(
ioContext.getSystem().getLogger(),
"Evaluating the fitness of the individuals in the " <<
uint2ordinal(ioContext.getDemeIndex()+1) << " deme"
);
Beagle_AssertM( ioDeme.size()!=0 );
// Prepare stats
prepareStats(ioDeme,ioContext);
// Generate a vector of indicies into the population
std::vector<unsigned int> lEvalVector;
for(unsigned int i=0; i<ioDeme.size(); i++) {
if((ioDeme[i]->getFitness() == NULL) ||
(ioDeme[i]->getFitness()->isValid() == false)) {
lEvalVector.push_back(i);
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"Added " << uint2ordinal(i+1) << " individual for evaluation."
);
}
}
std::random_shuffle(lEvalVector.begin(), lEvalVector.end(),
ioContext.getSystem().getRandomizer());
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"There are " << lEvalVector.size() << " individuals to be evaluated."
);
History::Handle lHistory = castHandleT<History>(ioContext.getSystem().haveComponent("History"));
while ( !lEvalVector.empty() ) {
// Put individuals and context into bags.
Individual::Bag lIndividuals;
Context::Bag lContexts;
lIndividuals.resize( mIndisPerGroup );
lContexts.resize( mIndisPerGroup );
unsigned int lIndiCounter =0;
for (unsigned int i=0; i<mIndisPerGroup; i++) {
// Set individual
lIndividuals[i] = ioDeme[lEvalVector.back()];
lIndiCounter++;
// Set context
Context::Alloc::Handle lContextAlloc =
castHandleT<Context::Alloc>(ioContext.getSystem().getFactory().getConceptAllocator("Context"));
Context::Handle lContext = castHandleT<Context>(lContextAlloc->clone(ioContext));
lContext->setIndividualIndex( lEvalVector.back() );
lContext->setIndividualHandle( ioDeme[lEvalVector.back()] );
lContexts[i] = lContext;
// Remove this index from the evaluation vector
lEvalVector.pop_back();
if(lEvalVector.empty()) {
lIndividuals.resize( lIndiCounter );
lContexts.resize( lIndiCounter );
break;
}
}
// Evaluate individuals
std::ostringstream lOSS;
lOSS << "Evaluating the fitness of the ";
for(unsigned int i=0; i<lIndiCounter; i++) {
// Add to message
if (i==lIndiCounter-1) lOSS << " and ";
lOSS << uint2ordinal(lContexts[i]->getIndividualIndex()+1);
if (i<lIndiCounter-2) lOSS << ", ";
}
lOSS << " individuals";
Beagle_LogVerboseM(
ioContext.getSystem().getLogger(),
lOSS.str()
);
Fitness::Bag::Handle lFitnessBag = evaluateIndividuals(lIndividuals, lContexts);
// Assign fitnesses
for (unsigned int i=0; i<lIndiCounter; i++) {
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"Considering fitness of the " << uint2ordinal(lContexts[i]->getIndividualIndex()+1) << " individual"
);
Beagle_AssertM( i < lFitnessBag->size() );
Fitness::Handle lFitness = lFitnessBag->at(i);
Beagle_NonNullPointerAssertM( lFitness );
lIndividuals[i]->setFitness( lFitness );
lIndividuals[i]->getFitness()->setValid();
if(lHistory != NULL) {
lHistory->allocateID(*lIndividuals[i]);
lHistory->trace(ioContext, std::vector<HistoryID>(), lIndividuals[i], getName(), "evaluation");
}
Beagle_LogVerboseM(
ioContext.getSystem().getLogger(),
*lIndividuals[i]->getFitness()
);
}
// Update stats
updateStats(lIndividuals.size(),ioContext);
}
updateHallOfFameWithDeme(ioDeme,ioContext);
Beagle_StackTraceEndM();
}