src/filter_factory.cpp

   1 /* $Id: filter_factory.cpp,v 1.1 2005-11-10 23:10:42 adam Exp $
   2    Copyright (c) 2005, Index Data.
   3
   4 %LICENSE%
   5  */
   6
   7 #include "filter_factory.hpp"
   8
   9 #include <stdexcept>
  10 #include <iostream>
  11 #include <string>
  12 #include <map>
  13
  14 namespace yp2 {
  15     class FilterFactory::Rep {
  16     public:
  17         friend class FilterFactory;
  18         CallbackMap m_fcm;
  19         Rep();
  20         ~Rep();
  21     };
  22 }
  23
  24 yp2::FilterFactoryException::FilterFactoryException(const std::string message)
  25     : std::runtime_error("FilterException: " + message)
  26 {
  27 }
  28
  29 yp2::FilterFactory::Rep::Rep()
  30 {
  31 }
  32
  33 yp2::FilterFactory::Rep::~Rep()
  34 {
  35 }
  36
  37 yp2::FilterFactory::FilterFactory() : m_p(new yp2::FilterFactory::Rep)
  38 {
  39
  40 }
  41
  42 yp2::FilterFactory::~FilterFactory()
  43 {
  44
  45 }
  46
  47 bool yp2::FilterFactory::add_creator(std::string fi,
  48                                      CreateFilterCallback cfc)
  49 {
  50     return m_p->m_fcm.insert(CallbackMap::value_type(fi, cfc)).second;
  51 }
  52
  53
  54 bool yp2::FilterFactory::drop_creator(std::string fi)
  55 {
  56     return m_p->m_fcm.erase(fi) == 1;
  57 }
  58
  59 yp2::filter::Base* yp2::FilterFactory::create(std::string fi)
  60 {
  61     CallbackMap::const_iterator it = m_p->m_fcm.find(fi);
  62
  63     if (it == m_p->m_fcm.end()){
  64         std::string msg = "filter type '" + fi + "' not found";
  65             throw yp2::FilterFactoryException(msg);
  66     }
  67     // call create function
  68     return (it->second());
  69 }
  70
  71 /*
  72  * Local variables:
  73  * c-basic-offset: 4
  74  * indent-tabs-mode: nil
  75  * c-file-style: "stroustrup"
  76  * End:
  77  * vim: shiftwidth=4 tabstop=8 expandtab
  78  */