/data/refman/pasoursint/CMSSW_5_3_1/src/Fireworks/Core/src/FWExpressionValidator.cc

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// -*- C++ -*-
//
// Package:     Core
// Class  :     FWExpressionValidator
//
// Implementation:
//     <Notes on implementation>
//
// Original Author:  Chris Jones
//         Created:  Fri Aug 22 20:42:51 EDT 2008
// $Id: FWExpressionValidator.cc,v 1.7 2010/06/18 10:17:15 yana Exp $
//

// system include files
#include <ctype.h>
#include <algorithm>

#include "Reflex/Member.h"
#include "Reflex/Base.h"
#include <cstring>

// user include files
#include "Fireworks/Core/src/FWExpressionValidator.h"
#include "CommonTools/Utils/src/returnType.h"

//
// constants, enums and typedefs
//
typedef std::vector<boost::shared_ptr<fireworks::OptionNode> > Options;

namespace fireworks {
   template< class T>
   struct OptionNodePtrCompare {
      bool operator()(const T& iLHS,
                      const T& iRHS) const
      {
         return *iLHS < *iRHS;
      }
   };

   template< class T>
   struct OptionNodePtrEqual {
      bool operator()(const T& iLHS,
                      const T& iRHS) const
      {
         return iLHS->description() == iRHS->description();
      }
   };


   class OptionNode {
public:
      OptionNode(const ROOT::Reflex::Member& );
      OptionNode(const std::string& iDescription,
                 unsigned long iSubstitutionEnd,
                 const ROOT::Reflex::Type& iType);

      const std::string& description() const {
         return m_description;
      }
      unsigned long substitutionEnd() const {
         return m_endOfName;
      }
      const std::vector<boost::shared_ptr<OptionNode> >& options() const {
         if(m_hasSubOptions && m_subOptions.empty()) {
            fillOptionForType(m_type, m_subOptions);
            std::sort(m_subOptions.begin(),m_subOptions.end(),
                      fireworks::OptionNodePtrCompare<boost::shared_ptr<OptionNode> >());
            std::vector<boost::shared_ptr<OptionNode> >::iterator it=
               std::unique(m_subOptions.begin(),m_subOptions.end(),
                           fireworks::OptionNodePtrEqual<boost::shared_ptr<OptionNode> >());
            m_subOptions.erase(it,  m_subOptions.end());

            m_hasSubOptions = !m_subOptions.empty();
         }
         return m_subOptions;
      }

      bool operator<(const OptionNode& iRHS) const {
         return m_description.substr(0,m_endOfName) < iRHS.m_description.substr(0,iRHS.m_endOfName);
      }

      static void fillOptionForType( const ROOT::Reflex::Type&,
                                     std::vector<boost::shared_ptr<OptionNode> >& );
private:
      ROOT::Reflex::Type m_type;
      mutable std::string m_description;
      mutable std::string::size_type m_endOfName;
      mutable std::vector<boost::shared_ptr<OptionNode> > m_subOptions;
      mutable bool m_hasSubOptions;
      static bool typeHasOptions(const ROOT::Reflex::Type& iType);
   };

   OptionNode::OptionNode(const std::string& iDescription,
                          unsigned long iSubstitutionEnd,
                          const ROOT::Reflex::Type& iType) :
      m_type(iType),
      m_description(iDescription),
      m_endOfName(iSubstitutionEnd),
      m_hasSubOptions(typeHasOptions(iType) )
   {
   }

   namespace {
      std::string descriptionFromMember(const ROOT::Reflex::Member& iMember)
      {
         std::string typeString = iMember.TypeOf().Name();
         std::string::size_type index = typeString.find_first_of("(");
         if(index == std::string::npos) {
            return iMember.Name()+":"+typeString;
         } else {
            return iMember.Name()+typeString.substr(index,std::string::npos)+":"+
                   typeString.substr(0,index);
         }
      }
   }

   OptionNode::OptionNode(const ROOT::Reflex::Member& iMember) :
      m_type(reco::returnType(iMember)),
      m_description(descriptionFromMember(iMember)),
      m_endOfName(iMember.Name().size()),
      m_hasSubOptions(typeHasOptions(m_type))
   {
   }


   void OptionNode::fillOptionForType( const ROOT::Reflex::Type& iType,
                                       std::vector<boost::shared_ptr<OptionNode> >& oOptions)
   {
      ROOT::Reflex::Type type = iType;
      if(type.IsPointer()) {
         type = type.ToType();
      }
      // first look in base scope
      oOptions.reserve(oOptions.size()+type.FunctionMemberSize());
      for(ROOT::Reflex::Member_Iterator m = type.FunctionMember_Begin(); m != type.FunctionMember_End(); ++m ) {
         if(!m->TypeOf().IsConst() ||
            m->IsConstructor() ||
            m->IsDestructor() ||
            m->IsOperator() ||
            !m->IsPublic() ||
            m->Name().substr(0,2)=="__") {continue;}
         oOptions.push_back(boost::shared_ptr<OptionNode>(new OptionNode(*m)));
      }

      for(ROOT::Reflex::Base_Iterator b = type.Base_Begin(); b != type.Base_End(); ++b) {
         fillOptionForType(b->ToType(),oOptions);
      }
   }

   bool OptionNode::typeHasOptions(const ROOT::Reflex::Type& iType) {
      return iType.IsClass();
   }

}

//
// static data member definitions
//

//
// constructors and destructor
//
#define FUN1(_fun_) \
   m_builtins.push_back(boost::shared_ptr<OptionNode>( new OptionNode( # _fun_ "(float):float", strlen( # _fun_ )+1,s_float)))

#define FUN2(_fun_) \
   m_builtins.push_back(boost::shared_ptr<OptionNode>( new OptionNode( # _fun_ "(float,float):float", strlen( # _fun_ )+1,s_float)))

FWExpressionValidator::FWExpressionValidator()
{
   using  fireworks::OptionNode;
   static const ROOT::Reflex::Type s_float(ROOT::Reflex::Type::ByTypeInfo(typeid(float)));
   FUN1(abs);
   FUN1(acos);
   FUN1(asin);
   FUN1(atan);
   FUN1(cos);
   FUN1(cosh);
   FUN1(exp);
   FUN1(log);
   FUN1(log10);
   FUN1(sin);
   FUN1(sinh);
   FUN1(sqrt);
   FUN1(tan);
   FUN1(tanh);
   FUN2(atan2);
   FUN2(chi2prob);
   FUN2(pow);
   FUN2(min);
   FUN2(max);
   std::sort(m_builtins.begin(),m_builtins.end(),
             fireworks::OptionNodePtrCompare<boost::shared_ptr<OptionNode> >());

}

// FWExpressionValidator::FWExpressionValidator(const FWExpressionValidator& rhs)
// {
//    // do actual copying here;
// }

FWExpressionValidator::~FWExpressionValidator()
{
}

//
// assignment operators
//
// const FWExpressionValidator& FWExpressionValidator::operator=(const FWExpressionValidator& rhs)
// {
//   //An exception safe implementation is
//   FWExpressionValidator temp(rhs);
//   swap(rhs);
//
//   return *this;
// }

//
// member functions
//
void
FWExpressionValidator::setType(const ROOT::Reflex::Type& iType)
{
   using fireworks::OptionNode;
   m_type=iType;
   m_options.clear();
   m_options=m_builtins;
   OptionNode::fillOptionForType(iType, m_options);
   std::sort(m_options.begin(),m_options.end(),
             fireworks::OptionNodePtrCompare<boost::shared_ptr<OptionNode> >());
   std::vector<boost::shared_ptr<OptionNode> >::iterator it=
      std::unique(m_options.begin(),m_options.end(),
                  fireworks::OptionNodePtrEqual<boost::shared_ptr<OptionNode> >());
   m_options.erase(it,  m_options.end());
}

//
// const member functions
//
namespace {
   void dummyDelete(void*) {
   }

   void findTypeDelimiters(const char*& ioBegin,
                           const char* iEnd,
                           std::vector<const char*>& oDelimeters)
   {
      oDelimeters.clear();
      if(ioBegin==iEnd) { return; }
      const char* it = iEnd-1;
      const char* itEnd = ioBegin-1;
      for(; it != itEnd; --it) {
         if(isalnum(*it)) { continue;}
         bool shouldStop=false;
         switch(*it) {
            case '_': break;
            case '.':
               oDelimeters.push_back(it);
               break;
            default:
               shouldStop=true;
         }
         if(shouldStop) { break;}
      }
      ioBegin = it+1;
      std::reverse(oDelimeters.begin(),oDelimeters.end());
   }
}

void
FWExpressionValidator::fillOptions(const char* iBegin, const char* iEnd,
                                   std::vector<std::pair<boost::shared_ptr<std::string>, std::string> >& oOptions) const
{
   using fireworks::OptionNode;
   oOptions.clear();
   std::vector<const char*> delimeters;
   findTypeDelimiters(iBegin, iEnd, delimeters);
   //must find correct OptionNode
   const Options* nodes = &m_options;
   const char* begin = iBegin;
   for(std::vector<const char*>::iterator it = delimeters.begin(), itEnd = delimeters.end();
       it != itEnd; ++it) {
      OptionNode temp(std::string(begin,*it),
                      *it-begin,
                      ROOT::Reflex::Type());

      boost::shared_ptr<OptionNode> comp(&temp, dummyDelete);
      Options::const_iterator itFind =std::lower_bound(nodes->begin(),
                                                       nodes->end(),
                                                       comp,
                                                       fireworks::OptionNodePtrCompare<boost::shared_ptr<OptionNode> >());

      if(itFind == nodes->end() ||  *comp < *(*itFind) ) {
         //no match so we have an error
         return;
      }
      nodes = &((*itFind)->options());
      begin = (*it)+1;
   }

   //only use add items which begin with the part of the member we are trying to match
   std::string part(begin,iEnd);
   unsigned int part_size = part.size();
   for(Options::const_iterator it = nodes->begin(), itEnd = nodes->end();
       it != itEnd;
       ++it) {
      if(part == (*it)->description().substr(0,part_size) ) {
         oOptions.push_back(std::make_pair(boost::shared_ptr<std::string>(const_cast<std::string*>(&((*it)->description())), dummyDelete),
                                           (*it)->description().substr(part_size,(*it)->substitutionEnd()-part_size)));
      }
   }
}

//
// static member functions
//