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// -*- C++ -*-
//
// Package: Core
// Class : FWExpressionEvaluator
//
// Implementation:
// <Notes on implementation>
//
// Original Author: Chris Jones
// Created: Fri Feb 29 13:39:56 PST 2008
//
// system include files
#include <sstream>
#include "FWCore/Reflection/interface/ObjectWithDict.h"
// user include files
#include "Fireworks/Core/interface/FWExpressionEvaluator.h"
#include "Fireworks/Core/interface/FWExpressionException.h"
#include "CommonTools/Utils/interface/parser/Grammar.h"
#include "CommonTools/Utils/interface/parser/Exception.h"
#include "Fireworks/Core/src/expressionFormatHelpers.h"
//
// constants, enums and typedefs
//
//
// static data member definitions
//
//
// constructors and destructor
//
FWExpressionEvaluator::FWExpressionEvaluator(const std::string& iExpression, const std::string& iClassName)
: m_className(iClassName), m_type(edm::TypeWithDict::byName(iClassName)) {
setExpression(iExpression);
}
// FWExpressionEvaluator::FWExpressionEvaluator(const FWExpressionEvaluator& rhs)
// {
// // do actual copying here;
// }
FWExpressionEvaluator::~FWExpressionEvaluator() {}
//
// assignment operators
//
// const FWExpressionEvaluator& FWExpressionEvaluator::operator=(const FWExpressionEvaluator& rhs)
// {
// //An exception safe implementation is
// FWExpressionEvaluator temp(rhs);
// swap(rhs);
//
// return *this;
// }
//
// member functions
//
void FWExpressionEvaluator::setExpression(const std::string& iExpression) {
if (m_type != edm::TypeWithDict() && !iExpression.empty()) {
using namespace fireworks::expression;
//Backwards compatibility with old format
std::string temp = oldToNewFormat(iExpression);
//now setup the parser
using namespace boost::spirit::classic;
reco::parser::ExpressionPtr tmpPtr;
reco::parser::Grammar grammar(tmpPtr, m_type);
try {
if (parse(temp.c_str(), grammar.use_parser<1>() >> end_p, space_p).full) {
m_expr = tmpPtr;
m_expression = iExpression;
} else {
throw FWExpressionException("syntax error", -1);
//std::cout <<"failed to parse "<<iExpression<<" because of syntax error"<<std::endl;
}
} catch (const reco::parser::BaseException& e) {
//NOTE: need to calculate actual position before doing the regex
throw FWExpressionException(reco::parser::baseExceptionWhat(e),
indexFromNewFormatToOldFormat(temp, e.where - temp.c_str(), iExpression));
//std::cout <<"failed to parse "<<iExpression<<" because "<<reco::parser::baseExceptionWhat(e)<<std::endl;
}
} else {
m_expression = iExpression;
}
}
void FWExpressionEvaluator::setClassName(const std::string& iClassName) {
//NOTE: How do we handle the case where the filter was created before
// the library for the class was loaded and therefore we don't have
// a dictionary for it?
m_className = iClassName;
m_type = edm::TypeWithDict::byName(iClassName);
setExpression(m_expression);
}
//
// const member functions
//
const std::string& FWExpressionEvaluator::expression() const { return m_expression; }
double FWExpressionEvaluator::evalExpression(const void* iObject) const {
if (m_expression.empty() || !m_expr.get()) {
return 0;
}
edm::ObjectWithDict o(m_type, const_cast<void*>(iObject));
return m_expr->value(o);
}
//
// static member functions
//
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