command-direct-setter.h

//
// Copyright 2010 CNRS
//
// Author: Nicolas Mansard
//
 
#ifndef __dg_command_direct_setter_h__
#define __dg_command_direct_setter_h__
 
/* Define a setter command directly on the attribute (no need to pass by
 * an explicit function). A typical use is given here:
 *     addCommand("setSize",
 *                makeDirectSetter(*this,&_dimension,
 *                                 docDirectSetter("dimension","int")));
 *
 */
 
#include <boost/assign/list_of.hpp>
 
#include "dynamic-graph/command.h"
 
/* --- SETTER --------------------------------------------------------- */
namespace dynamicgraph {
namespace command {
 
template <class E, typename T>
class DirectSetter : public Command {
 public:
  DirectSetter(E &entity, T *ptr, const std::string &docString)
      : Command(entity, boost::assign::list_of(ValueHelper<T>::TypeID),
                docString),
        T_ptr(ptr) {}
 
 protected:
  virtual Value doExecute() {
    const std::vector<Value> &values = getParameterValues();
    T val = values[0].value();
    (*T_ptr) = val;
    return Value();  // void
  }
 
 private:
  T *T_ptr;
};
 
template <class E, typename T>
DirectSetter<E, T> *makeDirectSetter(E &entity, T *ptr,
                                     const std::string &docString) {
  return new DirectSetter<E, T>(entity, ptr, docString);
}
 
inline std::string docDirectSetter(const std::string &name,
                                   const std::string &type) {
  return std::string("\nSet the ") + name + ".\n\nInput:\n - a " + type +
         ".\nVoid return.\n\n";
}
 
}  // namespace command
}  // namespace dynamicgraph
 
#endif  // __dg_command_direct_setter_h__