/*!
* \brief Generate a new ADF primitive from the given specifications.
* \param inIndex Tree index for which the primitive is created.
* \param inName Name of the primitive generated.
* \param inArgsName Name of the arguments associated to the invoker created.
* \param ioContext Evolutionary context.
*/
GP::Invoker::Handle GP::ADF::generateInvoker(unsigned int inIndex,
std::string inName,
std::string inArgsName,
GP::Context& ioContext) const
{
Beagle_StackTraceBeginM();
if(inIndex == UINT_MAX) {
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"primitive selection","Beagle::GP::ADF::generateInvoker",
"Generated ADF with UINT_MAX"
);
return new GP::ADF(UINT_MAX, UINT_MAX, inName, inArgsName);
} else {
GP::Tree::Handle lTree = ioContext.getIndividual()[inIndex];
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"primitive selection","Beagle::GP::ADF::generateInvoker",
std::string("Generated ADF with index ")+uint2str(inIndex)+" ("+uint2str(lTree->getNumberArguments())+" args)"
);
return new GP::ADF(inIndex, lTree->getNumberArguments(), inName, inArgsName);
}
Beagle_StackTraceEndM("GP::Invoker::Handle GP::ADF::generateInvoker(unsigned int inIndex, string inName, string inArgsName, GP::Context& ioContext) const");
}
void TreeSTag::removeNOP(Individual& inIndividual, GP::Context& ioContext) {
// Beagle_LogDebugM(
// ioContext.getSystem().getLogger(),
// "individual", "TreeSTag",
// std::string("Individual before NOP removal: ")+inIndividual.serialize()
// );
TreeSTag::Handle lTree = castHandleT<TreeSTag>((inIndividual)[0]);
GP::Individual& lIndividual = castObjectT<GP::Individual&>(inIndividual);
GP::Individual::Handle lOldIndividualHandle = ioContext.getIndividualHandle();
unsigned int lOldGenotypeIndex = ioContext.getGenotypeIndex();
GP::Tree::Handle lOldGenotypeHandle = ioContext.getGenotypeHandle();
ioContext.setIndividualHandle(&lIndividual);
ioContext.setGenotypeIndex(0);
ioContext.setGenotypeHandle(lIndividual[0]);
ioContext.getCallStack().clear();
removeNOPLoop(0,ioContext);
ioContext.setIndividualHandle(lOldIndividualHandle);
ioContext.setGenotypeIndex(lOldGenotypeIndex);
ioContext.setGenotypeHandle(lOldGenotypeHandle);
// Beagle_LogDebugM(
// ioContext.getSystem().getLogger(),
// "individual", "TreeSTag",
// std::string("Individual after NOP removal: ")+inIndividual.serialize()
// );
}
/*!
* \brief Exchange two GP trees on given points.
* \param ioTree1 First tree to mate.
* \param inNode1 Node index of the swap subtree first point.
* \param ioContext1 Evolutionary context relatively to the first tree.
* \param ioTree2 Second tree to mate.
* \param inNode2 Node index of the swap subtree second point.
* \param ioContext2 Evolutionary context relatively to the second tree.
*/
void GP::MutationSwapSubtreeOp::exchangeSubTrees(GP::Tree& ioTree1,
unsigned int inNode1,
GP::Context& ioContext1,
GP::Tree& ioTree2,
unsigned int inNode2,
GP::Context& ioContext2)
{
Beagle_StackTraceBeginM();
Beagle_AssertM(&ioTree1 != &ioTree2);
unsigned int lSwapSize1 = ioTree1[inNode1].mSubTreeSize;
unsigned int lSwapSize2 = ioTree2[inNode2].mSubTreeSize;
if(lSwapSize1 <= lSwapSize2) {
std::swap_ranges(ioTree1.begin()+inNode1, ioTree1.begin()+inNode1+lSwapSize1, ioTree2.begin()+inNode2);
ioTree1.insert(ioTree1.begin()+inNode1+lSwapSize1,
ioTree2.begin()+inNode2+lSwapSize1,
ioTree2.begin()+inNode2+lSwapSize2);
ioTree2.erase(ioTree2.begin()+inNode2+lSwapSize1, ioTree2.begin()+inNode2+lSwapSize2);
} else {
std::swap_ranges(ioTree1.begin()+inNode1, ioTree1.begin()+inNode1+lSwapSize2, ioTree2.begin()+inNode2);
ioTree2.insert(ioTree2.begin()+inNode2+lSwapSize2,
ioTree1.begin()+inNode1+lSwapSize2,
ioTree1.begin()+inNode1+lSwapSize1);
ioTree1.erase(ioTree1.begin()+inNode1+lSwapSize2, ioTree1.begin()+inNode1+lSwapSize1);
}
int lDiffSize = lSwapSize1 - lSwapSize2;
for(unsigned int i=0; i<(ioContext1.getCallStackSize()-1); i++)
ioTree1[ioContext1.getCallStackElement(i)].mSubTreeSize -= lDiffSize;
for(unsigned int j=0; j<(ioContext2.getCallStackSize()-1); j++)
ioTree2[ioContext2.getCallStackElement(j)].mSubTreeSize += lDiffSize;
Beagle_StackTraceEndM();
}
/*!
* \brief Set the value of the named GP primitive of the primitive sets.
* \param inName Name of the variable to set.
* \param inValue Value of the primitive.
* \param ioContext Context of the evaluation.
* \throw Beagle::RunTimeException If the named primitive is not found in any sets.
*/
void Coev::GPEvaluationOp::setValue(std::string inName,
const Object& inValue,
GP::Context& ioContext) const
{
Beagle_StackTraceBeginM();
GP::PrimitiveSuperSet::Handle lSuperSet =
castHandleT<GP::PrimitiveSuperSet>(ioContext.getSystem().getComponent("GP-PrimitiveSuperSet"));
if(lSuperSet == NULL) {
throw Beagle_RunTimeExceptionM("There should be a GP::PrimitiveSuperSet component in the system");
}
bool lValueFound = false;
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
std::string("Setting the primitives named '")+inName+
std::string("' to the value: ")+inValue.serialize()
);
for(unsigned int i=0; i<lSuperSet->size(); i++) {
GP::Primitive::Handle lPrimitive = (*lSuperSet)[i]->getPrimitiveByName(inName);
if(!lPrimitive) continue;
lValueFound = true;
lPrimitive->setValue(inValue);
}
if(lValueFound == false) {
std::string lMessage = "The primitive named '";
lMessage += inName;
lMessage += "' was not found in any ";
lMessage += "of the primitive sets. Maybe the primitive was not properly inserted ";
lMessage += "or the name is mispelled.";
throw Beagle_RunTimeExceptionM(lMessage);
}
Beagle_StackTraceEndM();
}
/*!
* \brief Get reference the tree to invoke.
* \param ioContext Evolutionary context.
* \return Handle to the invoked tree.
*/
GP::Tree::Handle GP::ADF::getInvokedTree(GP::Context& ioContext) const
{
Beagle_StackTraceBeginM();
Beagle_AssertM(mIndex < ioContext.getIndividual().size());
return ioContext.getIndividual()[mIndex];
Beagle_StackTraceEndM("GP::Tree::Handle GP::ADF::getInvokedTree(GP::Context& ioContext) const");
}
/*!
* \brief Initialize a tree.
* \param outTree Tree to initialize.
* \param inMinDepth Minimum depth of to make tree.
* \param inMaxDepth Maximum depth of to make tree.
* \param ioContext Evolution context.
* \return Size of newly initialized tree.
*/
unsigned int GP::InitGrowOp::initTree(GP::Tree& outTree,
unsigned int inMinDepth,
unsigned int inMaxDepth,
GP::Context& ioContext) const
{
Beagle_StackTraceBeginM();
if (mKozaGrow->getWrappedValue()) {
Beagle_LogVerboseM(
ioContext.getSystem().getLogger(),
"initialization", "Beagle::GP::InitGrowConstrainedOp",
"Setting the minimum depth to 2 (as per 'gp.init.kozagrow')"
);
inMinDepth=2;
}
Beagle_AssertM(inMaxDepth >= inMinDepth);
Beagle_AssertM(inMinDepth>0);
Beagle_LogVerboseM(
ioContext.getSystem().getLogger(),
"initialization", "Beagle::GP::InitGrowOp",
std::string("Using the \'grow\' method (with maximum depth ")+uint2str(inMaxDepth)+
std::string(" and minimum depth ")+uint2str(inMinDepth)+std::string(") to initialize the ")+
uint2ordinal(ioContext.getGenotypeIndex()+1)+std::string(" tree")
);
return initSubTreeGrow(outTree, inMinDepth, inMaxDepth, ioContext);
Beagle_StackTraceEndM("unsigned int GP::InitGrowOp::initTree(GP::Tree &outTree, unsigned int inMinDepth, unsigned int inMaxDepth, GP::Context& ioContext) const");
}
/*!
* \brief Initialize a constrained GP tree of a specified depth using the "full" approach.
* \param outTree Tree to initialize.
* \param inMinDepth Minimum depth to make tree.
* \param inMaxDepth Maximum depth to make tree.
* \param ioContext Evolutionary context.
*/
unsigned int GP::InitFullConstrainedOp::initTree(GP::Tree& outTree,
unsigned int inMinDepth,
unsigned int inMaxDepth,
GP::Context &ioContext) const
{
Beagle_StackTraceBeginM();
const unsigned int lDepth = inMaxDepth;
Beagle_AssertM(lDepth>0);
Beagle_LogVerboseM(
ioContext.getSystem().getLogger(),
"initialization", "Beagle::GP::InitFullConstrainedOp",
std::string("Using the constrained \'full\' method (with depth ")+
uint2str(lDepth)+std::string(") to initialize the ")+
uint2ordinal(ioContext.getGenotypeIndex()+1)+std::string(" tree.")
);
unsigned int lSubTreeSize;
do {
lSubTreeSize = initConstrainedSubTreeFull(outTree, lDepth, ioContext);
} while (lSubTreeSize == 0);
return lSubTreeSize;
Beagle_StackTraceEndM("unsigned int GP::InitFullConstrainedOp::initTree(GP::Tree& outTree, unsigned int inMinDepth, unsigned int inMaxDepth, GP::Context &ioContext) const");
}
/*!
* \brief Evaluate the individual fitness for the spambase problem.
* \param inIndividual Individual to evaluate.
* \param ioContext Evolutionary context.
* \return Handle to the fitness measure,
*/
Fitness::Handle SpambaseEvalOp::evaluate(GP::Individual& inIndividual, GP::Context& ioContext)
{
// Get reference to data set
DataSetClassification::Handle lDataSet =
castHandleT<DataSetClassification>(ioContext.getSystem().getComponent("DataSet"));
if(lDataSet == NULL) {
throw Beagle_RunTimeExceptionM("Data set is not present in the system, could not proceed further!");
}
// Generate indices used as data subset for fitness evaluation
std::vector<unsigned int> lSubSet(lDataSet->size());
for(unsigned int i=0; i<lSubSet.size(); ++i) lSubSet[i] = i;
std::random_shuffle(lSubSet.begin(), lSubSet.end(),
ioContext.getSystem().getRandomizer());
if(Spambase_TestSize < lSubSet.size()) {
lSubSet.resize(Spambase_TestSize);
}
// Evaluate sampled test cases
unsigned int lCorrectCount = 0;
for(unsigned int i=0; i<Spambase_TestSize; ++i) {
const bool lPositiveID = ((*lDataSet)[lSubSet[i]].first == 1);
const Beagle::Vector& lData = (*lDataSet)[lSubSet[i]].second;
for(unsigned int j=0; j<lData.size(); ++j) {
std::ostringstream lOSS;
lOSS << "IN" << j;
setValue(lOSS.str(), Double(lData[j]), ioContext);
}
Bool lResult;
inIndividual.run(lResult, ioContext);
if(lResult.getWrappedValue() == lPositiveID) ++lCorrectCount;
}
double lFitness = double(lCorrectCount) / Spambase_TestSize;
return new EC::FitnessSimple(lFitness);
}
void TreeSTag::removeNOPLoop(unsigned int inN, GP::Context& ioContext) {
GP::Tree& lActualTree = ioContext.getGenotype();
if(lActualTree[inN].mPrimitive->getName() == "NOP") {
//Decrease the subtree size of the call stack
for(unsigned i = 0; i < ioContext.getCallStackSize(); ++i) {
lActualTree[ioContext.getCallStack()[i]].mSubTreeSize -= 1;
}
//Delete the primitive from the tree
std::vector< GP::Node,BEAGLE_STLALLOCATOR<GP::Node> >::iterator lPrimitiveIter = lActualTree.begin();
lPrimitiveIter += inN;
lActualTree.erase(lPrimitiveIter);
// cout << "Callstack: " << ioContext.getCallStack()[0];
// for(unsigned int i = 1; i < ioContext.getCallStackSize() ; ++i) {
// cout << ", " << ioContext.getCallStack()[0];
// } cout << endl;
// for(unsigned int i = 0; i < lActualTree.size(); ++i) {
// cout << i << " : " << lActualTree[i].mPrimitive->getName() << " : " << lActualTree[i].mSubTreeSize << endl;
// }
removeNOPLoop(inN, ioContext);
} else {
//Parse all arguments
ioContext.pushCallStack(inN);
for(unsigned int i = 0; i < lActualTree[inN].mPrimitive->getNumberArguments(); ++i) {
removeNOPLoop(lActualTree[inN].mPrimitive->getChildrenNodeIndex(i,ioContext), ioContext);
}
ioContext.popCallStack();
}
}
/*!
* \brief Return indices of the trees that can be invoked by the module.
* \param outCandidates Indices of tree that can be selected as invokable in the actual context.
* \param inNumberArguments Number of arguments for which the selection is desired.
* \param ioContext Evolutionary context.
*/
void GP::Module::getCandidatesToInvoke(std::vector<unsigned int>& outCandidates,
unsigned int inNumberArguments,
GP::Context& ioContext) const
{
Beagle_StackTraceBeginM();
outCandidates.clear();
for(unsigned int i=0; i<ioContext.getCallStackSize(); ++i) {
if(ioContext.getGenotype()[ioContext.getCallStackElement(i)].mPrimitive->getName() == getName())
return;
}
Component::Handle lComponent = ioContext.getSystem().getComponent("ModuleVector");
GP::ModuleVectorComponent::Handle lModVector =
castHandleT<GP::ModuleVectorComponent>(lComponent);
if(lModVector==NULL) {
throw Beagle_RunTimeExceptionM(std::string("GP system is not configured with a module vector. ")+
std::string("Consider adding a GP::ModuleVectorComponent object to the system."));
}
for(unsigned int i=0; i<lModVector->size(); ++i) {
if((*lModVector)[i]==NULL) continue;
const unsigned int lNbArgsTree = (*lModVector)[i]->getNumberArguments();
if(inNumberArguments == GP::Primitive::eAny) outCandidates.push_back(i);
else if((inNumberArguments==GP::Primitive::eBranch) && (lNbArgsTree>0))
outCandidates.push_back(i);
else if(inNumberArguments == lNbArgsTree) outCandidates.push_back(i);
}
Beagle_StackTraceEndM();
}
/*!
* \brief Validate the arguments position in the tree.
* \param ioContext Evolutionary context.
* \return True if the argument is correctly positioned, false if not.
* \throw Beagle::AssertException If the context is in a bad state.
*/
bool GP::Argument::validate(GP::Context& ioContext) const
{
Beagle_StackTraceBeginM();
if(GP::Primitive::validate(ioContext) == false) return false;
if(ioContext.getGenotypeIndex() == 0) return false;
if(mIndex >= ioContext.getGenotype().getNumberArguments()) return false;
return true;
Beagle_StackTraceEndM();
}
/*!
* \brief Generate a new random ephemeral Double constant between [-1,1].
* \param inName Name of the constant.
* \param ioContext Context to use to generate the value.
* \return Handle to the ephemeral Double constant generated.
*/
GP::Primitive::Handle EphemeralDoubleWide::generate(Beagle::string inName, GP::Context& ioContext)
{
Beagle_StackTraceBeginM();
double factor = ioContext.getSystem().getRandomizer().rollUniform(-1.,1.);
double exp = ioContext.getSystem().getRandomizer().rollUniform(-4.,3.);
Double::Handle lValue = new Double(factor*pow(10, exp));
return new EphemeralDoubleWide(lValue, inName);
Beagle_StackTraceEndM("GP::Primitive::Handle SinsGP::EphemeralDoubleWide::generate(string inName, GP::Context& ioContext)");
}
/*!
* \brief Return a reference to the actual argument.
* \param inNumberArguments
* \param ioContext Evolutionary context.
* \return Handle to argument.
*/
GP::Primitive::Handle GP::Argument::giveReference(unsigned int inNumberArguments, GP::Context& ioContext)
{
Beagle_StackTraceBeginM();
if(mIndex!=eGenerator) return this;
const unsigned int lTreeNbArgs = ioContext.getGenotype().getNumberArguments();
Beagle_AssertM(lTreeNbArgs > 0);
const unsigned int lGenIndex =
ioContext.getSystem().getRandomizer().rollInteger(0,(lTreeNbArgs-1));
return generateArgument(lGenIndex);
Beagle_StackTraceEndM();
}
/*!
* \brief Return selection weight of the argument primitive.
* \param inNumberArguments Number of arguments to get weight for.
* \param ioContext Evolutionary context.
* \return Selection weight for the given number of arguments.
*/
double GP::Argument::getSelectionWeight(unsigned int inNumberArguments,
GP::Context& ioContext) const
{
Beagle_StackTraceBeginM();
if(ioContext.getGenotypeIndex() == 0) return 0.0;
if((inNumberArguments==0) || (inNumberArguments==GP::Primitive::eAny)) {
const unsigned int lTreeNbArgs = ioContext.getGenotype().getNumberArguments();
if(lTreeNbArgs > 0) return double(lTreeNbArgs);
}
return 0.0;
Beagle_StackTraceEndM();
}
/*!
* \brief Initialize a GP sub-tree of a specified depth using the "grow" approach.
* \param ioTree Tree containing the sub-tree to initialize.
* \param inMinDepth Minimal depth of the sub-tree to initialize.
* \param inMaxDepth Maximal depth of the sub-tree to initialize.
* \param ioContext Evolutionary context.
* \return Generated sub-tree size.
*/
unsigned int GP::InitGrowOp::initSubTreeGrow(GP::Tree& ioTree,
unsigned int inMinDepth,
unsigned int inMaxDepth,
GP::Context& ioContext) const
{
Beagle_StackTraceBeginM();
Beagle_AssertM(inMaxDepth >= inMinDepth);
Beagle_AssertM(inMinDepth>0);
GP::PrimitiveSet& lPrimitSet = ioTree.getPrimitiveSet(ioContext);
GP::Primitive::Handle lPrimit = NULL;
if(inMinDepth > 1) {
lPrimit = lPrimitSet.select(GP::Primitive::eBranch, ioContext);
if(!lPrimit) {
std::string lMessage = "There is no branch (primitive with arguments) in the ";
lMessage += uint2ordinal(ioContext.getGenotypeIndex()+1);
lMessage += " primitive set!";
throw Beagle_RunTimeExceptionM(lMessage);
}
lPrimit = lPrimit->giveReference(GP::Primitive::eBranch, ioContext);
} else if(inMaxDepth == 1) {
lPrimit = lPrimitSet.select(GP::Primitive::eTerminal, ioContext);
if(!lPrimit) {
std::string lMessage = "There is no leaf (primitive without argument) in the ";
lMessage += uint2ordinal(ioContext.getGenotypeIndex()+1);
lMessage += " primitive set!";
throw Beagle_RunTimeExceptionM(lMessage);
}
lPrimit = lPrimit->giveReference(GP::Primitive::eTerminal, ioContext);
} else {
lPrimit = lPrimitSet.select(GP::Primitive::eAny, ioContext);
if(!lPrimit) {
std::string lMessage = "There is no primitive in the ";
lMessage += uint2ordinal(ioContext.getGenotypeIndex()+1);
lMessage += " primitive set!";
throw Beagle_RunTimeExceptionM(lMessage);
}
lPrimit = lPrimit->giveReference(GP::Primitive::eAny, ioContext);
}
unsigned int lNodeIndex = ioTree.size();
ioTree.push_back(GP::Node(lPrimit, 1));
unsigned int lSubTreeSize = 1;
unsigned int lMinDepth = (inMinDepth > 1) ? (inMinDepth-1) : 1;
for(unsigned int i=0; i<ioTree[lNodeIndex].mPrimitive->getNumberArguments(); i++) {
lSubTreeSize += initSubTreeGrow(ioTree, lMinDepth, inMaxDepth-1, ioContext);
}
ioTree[lNodeIndex].mSubTreeSize = lSubTreeSize;
return lSubTreeSize;
Beagle_StackTraceEndM("unsigned int GP::InitGrowOp::initSubTreeGrow(GP::Tree& ioTree, unsigned int inMinDepth, unsigned int inMaxDepth, GP::Context& ioContext) const");
}
/*!
* \brief Execute argument primitive.
* \param outResult Result containing value of argument.
* \param ioContext Evolutionary context.
*/
void GP::Argument::execute(GP::Datum& outResult, GP::Context& ioContext)
{
Beagle_StackTraceBeginM();
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"evaluation", "Beagle::GP::Argument",
std::string("Executing the ")+uint2ordinal(mIndex+1)+" argument"
);
switch (mSharedData->mEvalMode) {
case ePreCompute:
// The result of evaluating the argument has already been calculated.
Beagle_AssertM(mIndex < mSharedData->mCaches.back()->size());
mSharedData->mTypeAllocator->copy(outResult, *(*mSharedData->mCaches.back())[mIndex]);
break;
case eJustInTime:
// Evaluate the argument because we're not caching them.
forceEvaluation(outResult, ioContext);
break;
case eCaching:
// Check first if the argument has been evaluated (i.e. is it in the cache?)
// If it has been evaluated then get it from the cache; otherwise evaluate it.
Beagle_AssertM(mIndex < mSharedData->mCaches.back()->size());
if((*mSharedData->mCaches.back())[mIndex]!=NULL) {
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"evaluation", "Beagle::GP::Argument",
"Getting result from the cache"
);
mSharedData->mTypeAllocator->copy(outResult, *(*mSharedData->mCaches.back())[mIndex]);
} else {
Object::Bag::Handle lCurrentCache = mSharedData->mCaches.back();
mSharedData->mCaches.pop_back();
forceEvaluation(outResult, ioContext);
mSharedData->mCaches.push_back(lCurrentCache);
(*lCurrentCache)[mIndex] = mSharedData->mTypeAllocator->clone(outResult);
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"evaluation", "Beagle::GP::Argument",
"Result added to cache"
);
}
break;
default:
throw Beagle_InternalExceptionM(std::string("Undefined evaluation mode (")+
uint2str(mSharedData->mEvalMode)+std::string(") for arguments!"));
}
Beagle_StackTraceEndM();
}
/*!
* \brief Randomly select a node that takes arguments from a specific
* tree in the individual.
* \return Randomly selected tree
*/
unsigned int GP::Individual::chooseRandomNodeWithArgs(unsigned int inTree,
GP::Context& ioContext) const
{
Beagle_StackTraceBeginM();
const GP::Tree& lTree = *(operator[](inTree));
unsigned int lSize = lTree.size();
if (lSize < 2) {
std::ostringstream lOSS;
lOSS << "In GP::Individual::chooseRandomNodeWithArgs(): ";
lOSS << "Could not choose a node with arguments because the specified tree has fewer ";
lOSS << "than two (" << lSize << ") nodes, hence there are no such nodes";
lOSS << " in the tree. This occurred while calling chooseRandomNodeWithArgs() with an ";
lOSS << "inTree value of " << inTree;
throw Beagle_RunTimeExceptionM(lOSS.str());
}
// Loop through the tree adding appropriate nodes into the roulette
RouletteT<unsigned int> lRoulette;
for (unsigned int i=0; i<lSize; i++) {
if(lTree[i].mSubTreeSize > 1) lRoulette.insert(i);
}
// Select node with roulette
Beagle_AssertM(!lRoulette.empty());
return lRoulette.select(ioContext.getSystem().getRandomizer());
Beagle_StackTraceEndM();
}
/*!
* \brief Randomly select a node from a specific tree in the individual.
* \return Randomly selected tree
*
* Each node has an equal probability of being selected.
*/
unsigned int GP::Individual::chooseRandomNode(unsigned int inTree, GP::Context& ioContext) const
{
Beagle_StackTraceBeginM();
Beagle_AssertM(operator[](inTree)->size()!=0);
return ioContext.getSystem().getRandomizer().rollInteger(0, operator[](inTree)->size()-1);
Beagle_StackTraceEndM();
}
/*!
* \brief Return indices of the trees that can be invoked by the ADF.
* \param outCandidates Indices of tree that can be selected as invokable in the actual context.
* \param inNumberArguments Number of arguments for which the selection is desired.
* \param ioContext Evolutionary context.
*/
void GP::ADF::getCandidatesToInvoke(std::vector<unsigned int>& outCandidates,
unsigned int inNumberArguments,
GP::Context& ioContext) const
{
Beagle_StackTraceBeginM();
outCandidates.clear();
for(unsigned int i=(ioContext.getGenotypeIndex()+1); i<ioContext.getIndividual().size(); ++i) {
GP::Tree::Handle lTree = castHandleT<GP::Tree>(ioContext.getIndividual()[i]);
const unsigned int lNbArgsTree = lTree->getNumberArguments();
if(inNumberArguments == GP::Primitive::eAny) outCandidates.push_back(i);
else if((inNumberArguments == GP::Primitive::eBranch) && (lNbArgsTree>0))
outCandidates.push_back(i);
else if(inNumberArguments == lNbArgsTree) outCandidates.push_back(i);
}
Beagle_StackTraceEndM("void GP::ADF::getCandidatesToInvoke(std::vector<unsigned int>& outCandidates, unsigned int inNumberArguments, GP::Context& ioContext) const");
}
/*!
* \brief Invoke GP tree to execute as ADF.
* \param outResult Result of GP tree invocation
* \param ioTree Tree to invoke.
* \param ioContext Evolutionary context.
*/
void GP::ADF::invoke(GP::Datum& outResult, GP::Tree::Handle ioTree, GP::Context& ioContext)
{
Beagle_StackTraceBeginM();
GP::Tree::Handle lOldGenotypeHandle = ioContext.getGenotypeHandle();
unsigned int lOldGenotypeIndex = ioContext.getGenotypeIndex();
ioContext.setGenotypeHandle(ioTree);
ioContext.setGenotypeIndex(mIndex);
ioContext.incrementNodesExecuted();
ioContext.pushCallStack(0);
(*ioTree)[0].mPrimitive->execute(outResult, ioContext);
ioContext.popCallStack();
ioContext.checkExecutionTime();
ioContext.setGenotypeHandle(lOldGenotypeHandle);
ioContext.setGenotypeIndex(lOldGenotypeIndex);
Beagle_StackTraceEndM("void GP::ADF::invoke(GP::Datum& outResult, GP::Tree::Handle ioTree, GP::Context& ioContext)");
}
/*!
* \brief Validate the module position in the tree.
* \param ioContext Evolutionary context.
* \return True if the module is correctly positioned, false if not.
* \throw Beagle::AssertException If the context is in a bad state.
*/
bool GP::Module::validate(GP::Context& ioContext) const
{
Beagle_StackTraceBeginM();
for(unsigned int i=0; i<ioContext.getCallStackSize(); ++i) {
if(ioContext.getGenotype()[ioContext.getCallStackElement(i)].mPrimitive->getName() == getName())
return false;
}
Component::Handle lComponent = ioContext.getSystem().getComponent("ModuleVector");
GP::ModuleVectorComponent::Handle lModVector =
castHandleT<GP::ModuleVectorComponent>(lComponent);
if(lModVector==NULL) {
throw Beagle_RunTimeExceptionM(std::string("GP system is not configured with a module vector. ")+
std::string("Consider adding a GP::ModuleVectorComponent object to the system."));
}
Beagle_AssertM((*lModVector)[mIndex]!=NULL);
if((*lModVector)[mIndex]->getNumberArguments() != getNumberArguments()) return false;
return GP::Primitive::validate(ioContext);
Beagle_StackTraceEndM();
}
/*!
* \brief Build a roulette of nodes that can be selected following the constraints penalties.
* \param ioRoulette Roulette of nodes that can be selected following the constraints given.
* \param inSelectABranch True if node to select must be a branch, false if it must a leaf.
* \param inNodeReturnType Desired return type for the nodes to be selected.
* \param inMaxSubTreeDepth Maximum sub tree depth allowed of the node to be selected.
* \param inMaxSubTreeSize Maximum sub tree size allowed of the node to be selected.
* \param inActualIndex Index in actual tree of the node processed.
* \param inTree Tree processed.
* \param ioContext Evolutionary context.
* \return Max depth of subtree processed.
*/
unsigned int STGP::CrossoverConstrainedOp::buildRouletteWithType(
RouletteT< std::pair<unsigned int,unsigned int> >& ioRoulette,
bool inSelectABranch,
const std::type_info* inNodeReturnType,
unsigned int inMaxSubTreeDepth,
unsigned int inMaxSubTreeSize,
unsigned int inActualIndex,
GP::Tree& inTree,
GP::Context& ioContext) const
{
Beagle_StackTraceBeginM();
const unsigned int lNbArgs = inTree[inActualIndex].mPrimitive->getNumberArguments();
const unsigned int lSubTreeSize = inTree[inActualIndex].mSubTreeSize;
const bool lGoodArity = ((inTree.size()==1) || ((lNbArgs==0) != inSelectABranch));
ioContext.pushCallStack(inActualIndex);
const std::type_info* lNodeType = inTree[inActualIndex].mPrimitive->getReturnType(ioContext);
const bool lCompatibleTyping = ((inNodeReturnType==NULL) || (lNodeType==NULL) ||
(inNodeReturnType==lNodeType));
unsigned int lChildIndex = inActualIndex+1;
unsigned int lMaxDepthDown = 0;
for(unsigned int i=0; i<lNbArgs; ++i) {
unsigned int lChildDepth = buildRouletteWithType(ioRoulette,
inSelectABranch,
inNodeReturnType,
inMaxSubTreeDepth,
inMaxSubTreeSize,
lChildIndex,
inTree,
ioContext);
lChildIndex += inTree[lChildIndex].mSubTreeSize;
if(lChildDepth > lMaxDepthDown) lMaxDepthDown = lChildDepth;
}
++lMaxDepthDown;
const unsigned int lMaxDepthUp = ioContext.getCallStackSize();
ioContext.popCallStack();
if(lGoodArity && lCompatibleTyping && (lSubTreeSize<=inMaxSubTreeSize) &&
(lMaxDepthDown<=inMaxSubTreeDepth) && (lMaxDepthUp<=inMaxSubTreeDepth)) {
std::pair<unsigned int,unsigned int> lPair(ioContext.getGenotypeIndex(), inActualIndex);
ioRoulette.insert(lPair, 1.0);
}
return lMaxDepthDown;
Beagle_StackTraceEndM();
}
/*!
* \brief Initialize a tree.
* \param outTree Tree to initialize.
* \param inMinDepth Minimum depth to make tree.
* \param inMaxDepth Maximum depth to make tree.
* \param ioContext Evolution context.
* \return Size of newly initialized tree.
*/
unsigned int GP::InitHalfOp::initTree(GP::Tree &outTree,
unsigned int inMinDepth,
unsigned int inMaxDepth,
GP::Context &ioContext) const
{
Beagle_StackTraceBeginM();
if(ioContext.getSystem().getRandomizer().rollUniform(0.0, 1.0) < 0.5)
return mInitFullOp.initTree(outTree, inMinDepth, inMaxDepth, ioContext);
return mInitGrowOp.initTree(outTree, inMinDepth, inMaxDepth, ioContext);
Beagle_StackTraceEndM();
}
/*!
* \brief Read an argument primitive from XML subtree.
* \param inIter XML iterator to read primitive from.
* \param ioContext Evolutionary context.
*/
void GP::Argument::readWithContext(PACC::XML::ConstIterator inIter, GP::Context& ioContext)
{
Beagle_StackTraceBeginM();
GP::Primitive::readWithContext(inIter, ioContext);
std::string lIndexValue = inIter->getAttribute("id");
if(lIndexValue.empty()==false) {
mIndex = str2uint(lIndexValue);
Beagle_AssertM(mIndex < ioContext.getGenotype().getNumberArguments());
}
Beagle_StackTraceEndM();
}
/*!
* \brief Randomly select a tree from the individual.
* \return Randomly selected tree
*
* The selection is biased towards trees with a greater number of nodes
* (i.e. each node has an equal probability of being selected).
*/
unsigned int GP::Individual::chooseRandomTree(GP::Context& ioContext) const
{
Beagle_StackTraceBeginM();
unsigned int lChosenNode = ioContext.getSystem().getRandomizer().rollInteger(0, getTotalNodes()-1);
unsigned int lChosenTree = 0;
for(; (lChosenTree+1)<size(); lChosenTree++) {
if(lChosenNode < (*this)[lChosenTree]->size()) break;
else lChosenNode -= (*this)[lChosenTree]->size();
}
return lChosenTree;
Beagle_StackTraceEndM();
}
/*!
* \brief Push execution context to prepare the execution of the argument.
* \param inNumberArguments Number of arguments of called tree.
* \param ioContext Evolutionary context.
*/
void GP::Argument::pushExecutionContext(unsigned int inNumberArguments, GP::Context& ioContext)
{
Beagle_StackTraceBeginM();
switch(mSharedData->mEvalMode) {
case eCaching: {
Object::Bag::Handle lNewCache = new Object::Bag(inNumberArguments, NULL);
mSharedData->mCaches.push_back(lNewCache);
Context::Alloc::Handle lContextAlloc =
castHandleT<Context::Alloc>(ioContext.getSystem().getFactory().getConceptAllocator("Context"));
GP::Context::Handle lNewEvalContext =
castHandleT<GP::Context>(lContextAlloc->clone(ioContext));
mSharedData->mEvalContext.push_back(lNewEvalContext);
break;
}
case eJustInTime: {
Context::Alloc::Handle lContextAlloc =
castHandleT<Context::Alloc>(ioContext.getSystem().getFactory().getConceptAllocator("Context"));
GP::Context::Handle lNewEvalContext =
castHandleT<GP::Context>(lContextAlloc->clone(ioContext));
mSharedData->mEvalContext.push_back(lNewEvalContext);
break;
}
case ePreCompute: {
Object::Bag::Handle lNewCache = new Object::Bag(inNumberArguments, NULL);
lNewCache->resize(inNumberArguments);
for(unsigned int i=0; i<inNumberArguments; ++i) {
Object::Handle lArgI = mSharedData->mTypeAllocator->allocate();
getArgument(i, *lArgI, ioContext);
(*lNewCache)[i] = lArgI;
}
mSharedData->mCaches.push_back(lNewCache);
}
default: {
throw Beagle_InternalExceptionM(std::string("Undefined evaluation mode (")+
uint2str(mSharedData->mEvalMode)+std::string(") for the arguments!"));
}
}
Beagle_StackTraceEndM();
}
/*!
* \brief Get reference the tree to invoke.
* \param ioContext Evolutionary context.
* \return Handle to the invoked tree.
*/
GP::Tree::Handle GP::Module::getInvokedTree(GP::Context& ioContext) const
{
Beagle_StackTraceBeginM();
Component::Handle lComponent = ioContext.getSystem().getComponent("ModuleVector");
GP::ModuleVectorComponent::Handle lModVector =
castHandleT<GP::ModuleVectorComponent>(lComponent);
if(lModVector==NULL) {
throw Beagle_RunTimeExceptionM(std::string("GP system is not configured with a module vector. ")+
std::string("Consider adding a GP::ModuleVectorComponent object to the system."));
}
Beagle_AssertM(mIndex < lModVector->size());
Beagle_AssertM((*lModVector)[mIndex] != NULL);
return (*lModVector)[mIndex];
Beagle_StackTraceEndM();
}
void GP::Argument::forceEvaluation(GP::Datum& outResult, GP::Context& ioContext)
{
Beagle_LogDebugM(
ioContext.getSystem().getLogger(),
"evaluation", "Beagle::GP::Argument",
std::string("Evaluating the ")+uint2ordinal(mIndex+1)+" argument"
);
GP::Context::Handle lActualContext = mSharedData->mEvalContext.back();
mSharedData->mEvalContext.pop_back();
lActualContext->setAllowedNodesExecution(ioContext.getAllowedNodesExecution());
lActualContext->setAllowedExecutionTime(ioContext.getAllowedExecutionTime());
lActualContext->setNodesExecutionCount(ioContext.getNodesExecutionCount());
lActualContext->getExecutionTimer() = ioContext.getExecutionTimer();
getArgument(mIndex, outResult, *lActualContext);
ioContext.getExecutionTimer() = lActualContext->getExecutionTimer();
ioContext.setNodesExecutionCount(lActualContext->getNodesExecutionCount());
ioContext.setAllowedExecutionTime(lActualContext->getAllowedExecutionTime());
ioContext.setAllowedNodesExecution(lActualContext->getAllowedNodesExecution());
mSharedData->mEvalContext.push_back(lActualContext);
}
/*!
* \brief Randomly select a node that takes no argument from a specific
* tree in the individual.
* \return Randomly selected tree
*/
unsigned int GP::Individual::chooseRandomNodeWithoutArgs(unsigned int inTree,
GP::Context& ioContext) const
{
Beagle_StackTraceBeginM();
// Loop through the tree adding appropriate nodes into the roulette
unsigned int lSize = operator[](inTree)->size();
RouletteT<unsigned int> lRoulette;
for (unsigned int i=0; i<lSize; i++) {
if (operator[](inTree)->operator[](i).mSubTreeSize == 1) {
lRoulette.insert(i);
}
}
// Select node with roulette
Beagle_AssertM(!lRoulette.empty());
return lRoulette.select(ioContext.getSystem().getRandomizer());
Beagle_StackTraceEndM();
}
/*!
* \brief Generate a new Module primitive from the given specifications.
* \param inIndex Tree index for which the primitive is created.
* \param inName Name of the primitive generated.
* \param inArgsName Name of the arguments associated to the invoker created.
* \param ioContext Evolutionary context.
*/
GP::Invoker::Handle GP::Module::generateInvoker(unsigned int inIndex,
std::string inName,
std::string inArgsName,
GP::Context& ioContext) const
{
Beagle_StackTraceBeginM();
Component::Handle lComponent = ioContext.getSystem().getComponent("ModuleVector");
GP::ModuleVectorComponent::Handle lModVector =
castHandleT<GP::ModuleVectorComponent>(lComponent);
if(lModVector==NULL) {
throw Beagle_RunTimeExceptionM(std::string("GP system is not configured with a module vector. ")+
std::string("Consider adding a GP::ModuleVectorComponent object to the system."));
}
GP::Tree::Handle lTree = (*lModVector)[inIndex];
Beagle_AssertM(lTree != NULL);
return new GP::Module(inIndex, lTree->getNumberArguments(), inName, inArgsName);
Beagle_StackTraceEndM();
}
