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yap-6.3/packages/CLPBN/horus/FactorGraph.h
2012-12-27 22:25:45 +00:00

150 lines
3.0 KiB
C++

#ifndef HORUS_FACTORGRAPH_H
#define HORUS_FACTORGRAPH_H
#include <vector>
#include "Factor.h"
#include "BayesBallGraph.h"
#include "Horus.h"
using namespace std;
class FacNode;
class VarNode : public Var
{
public:
VarNode (VarId varId, unsigned nrStates,
int evidence = Constants::NO_EVIDENCE)
: Var (varId, nrStates, evidence) { }
VarNode (const Var* v) : Var (v) { }
void addNeighbor (FacNode* fn) { neighs_.push_back (fn); }
const FacNodes& neighbors (void) const { return neighs_; }
private:
FacNodes neighs_;
DISALLOW_COPY_AND_ASSIGN (VarNode);
};
class FacNode
{
public:
FacNode (const Factor& f) : factor_(f), index_(-1) { }
const Factor& factor (void) const { return factor_; }
Factor& factor (void) { return factor_; }
void addNeighbor (VarNode* vn) { neighs_.push_back (vn); }
const VarNodes& neighbors (void) const { return neighs_; }
size_t getIndex (void) const { return index_; }
void setIndex (size_t index) { index_ = index; }
string getLabel (void) { return factor_.getLabel(); }
private:
VarNodes neighs_;
Factor factor_;
size_t index_;
DISALLOW_COPY_AND_ASSIGN (FacNode);
};
class FactorGraph
{
public:
FactorGraph (void) : bayesFactors_(false) { }
FactorGraph (const FactorGraph&);
~FactorGraph (void);
const VarNodes& varNodes (void) const { return varNodes_; }
const FacNodes& facNodes (void) const { return facNodes_; }
void setFactorsAsBayesian (void) { bayesFactors_ = true; }
bool bayesianFactors (void) const { return bayesFactors_; }
size_t nrVarNodes (void) const { return varNodes_.size(); }
size_t nrFacNodes (void) const { return facNodes_.size(); }
VarNode* getVarNode (VarId vid) const
{
VarMap::const_iterator it = varMap_.find (vid);
return it != varMap_.end() ? it->second : 0;
}
void readFromUaiFormat (const char*);
void readFromLibDaiFormat (const char*);
void addFactor (const Factor& factor);
void addVarNode (VarNode*);
void addFacNode (FacNode*);
void addEdge (VarNode*, FacNode*);
bool isTree (void) const;
BayesBallGraph& getStructure (void);
void print (void) const;
void exportToGraphViz (const char*) const;
void exportToUaiFormat (const char*) const;
void exportToLibDaiFormat (const char*) const;
private:
void ignoreLines (std::ifstream&) const;
bool containsCycle (void) const;
bool containsCycle (const VarNode*, const FacNode*,
vector<bool>&, vector<bool>&) const;
bool containsCycle (const FacNode*, const VarNode*,
vector<bool>&, vector<bool>&) const;
VarNodes varNodes_;
FacNodes facNodes_;
BayesBallGraph structure_;
bool bayesFactors_;
typedef unordered_map<unsigned, VarNode*> VarMap;
VarMap varMap_;
DISALLOW_ASSIGN (FactorGraph);
};
struct sortByVarId
{
bool operator()(VarNode* vn1, VarNode* vn2) {
return vn1->varId() < vn2->varId();
}
};
#endif // HORUS_FACTORGRAPH_H