DDConstant Class Reference

a named constant corresponding to the DDL-XML tag <Constant> and <ConstantsVector> More...

#include <DDConstant.h>

Inheritance diagram for DDConstant:

List of all members.

Public Member Functions
	DDConstant ()
	an uninitialized constant; one can assign an initialized constant to make it valid
	DDConstant (const DDName &name)
	a refenrence to a constant
	DDConstant (const DDName &name, double *value)
	creation of a new named constant; if it already existed with the given name, it's overwritten with new values
	operator double () const
	convert to a double
double	value () const
	return the first stored value; does not check boundaries!
Static Public Member Functions
static void	createConstantsFromEvaluator ()
	creates all DDConstants from the variables of the ClhepEvaluator

---

Detailed Description

a named constant corresponding to the DDL-XML tag <Constant> and <ConstantsVector>

Definition at line 15 of file DDConstant.h.

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Constructor & Destructor Documentation

DDConstant::DDConstant

(

)

an uninitialized constant; one can assign an initialized constant to make it valid

Definition at line 8 of file DDConstant.cc.

: DDBase<DDName,double*>() { }

DDConstant::DDConstant

(

const DDName &

name

)

a refenrence to a constant

Definition at line 11 of file DDConstant.cc.

References DDI::Singleton< I >::instance(), and DDBase< DDName, double * >::prep_.

                                          : DDBase<DDName,double*>() 
{
  prep_ = StoreT::instance().create(name);
}

DDConstant::DDConstant	(	const DDName &	name,
		double *	value
	)

creation of a new named constant; if it already existed with the given name, it's overwritten with new values

Definition at line 16 of file DDConstant.cc.

References DDI::Singleton< I >::instance(), and DDBase< DDName, double * >::prep_.

{
  prep_ = StoreT::instance().create(name,vals);
}  

---

Member Function Documentation

void DDConstant::createConstantsFromEvaluator

(

)

[static]

creates all DDConstants from the variables of the ClhepEvaluator

Definition at line 36 of file DDConstant.cc.

References ClhepEvaluator::eval(), i, DDI::Singleton< I >::instance(), DDBase< DDName, double * >::name(), asciidump::s, ClhepEvaluator::values(), and ClhepEvaluator::variables().

Referenced by DDLSAX2FileHandler::createDDConstants(), and DDStreamer::vars_read().

{
  ExprEvalInterface & ev = ExprEvalSingleton::instance();
  ClhepEvaluator * eval = dynamic_cast<ClhepEvaluator*>(&ev);
  if (eval){
    const std::vector<std::string> & vars = eval->variables();
    const std::vector<std::string> & vals = eval->values();
    if (vars.size() != vals.size()) {
      throw DDException("DDConstants::createConstansFromEvaluator(): different size of variable names & values!") ;
    }
    size_t i(0), s(vars.size());
    for (; i<s; ++i) {
      const std::string & sr = vars[i];
      typedef std::string::size_type ST;
      ST i1 = sr.find("___");
      DDName name(std::string(sr,i1+3,sr.size()-1),std::string(sr,0,i1));       
      double* dv = new double;
      *dv = eval->eval(sr.c_str());
      DDConstant cst(name,dv);//(ddname); 
    }  
  }
  else {
    throw DDException("DDConstants::createConstansFromEvaluator(): expression-evaluator is not a ClhepEvaluator-implementation!");
  }
}

DDConstant::operator double

(

)

const [inline]

convert to a double

Definition at line 34 of file DDConstant.h.

References DDBase< DDName, double * >::rep().

{ return rep(); }

double DDConstant::value

(

)

const [inline]

return the first stored value; does not check boundaries!

Definition at line 31 of file DDConstant.h.

References DDBase< DDName, double * >::rep().

Referenced by operator<<().

{ return rep(); }