If your solution is generic i'm interested. Is it possible to look at code ? BTW, Your library may correlate with expected serialization library.
regards, bohdan "Rob & Lori" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > For those of you who are unfamiliar with pluggable factories, I suggest > reading the following C++ Report article: > http://www.adtmag.com/joop/crarticle.asp?ID=1520 > > To give a brief description, pluggable factories allow programmers to > create instances of a class by just referencing a class identifier. > Pluggable factories are extremely helpful anytime you wish to construct > a class based on outside input such as reconstructing classes sent over > a TCP/IP stream, constructing classes read from a file, constructing > classes to execute commands read in from a scripting/macro language, etc. > > The pluggable factory has these features: > 1. Classes can be registered and unregistered dynamically > 2. Any data type that implements the assignment and comparison operators > can be used as a class identifier type > 3. Classes can be registered with multiple class identifier's, even if > they are of different data types > 3. Instances of new classes can be created simply by passing the correct > class identifier > 4. The class identifier value can be retrieved for any given registered > class > > Let me know what you guys think. > > Rob Geiman > > > Example usage: > > typedef ObjectFactory<Command> CommandFactory; > > static std::string open_file_command = "open_file"; > static std::string close_file_command = "close_file"; > static std::string find_text_command = "find_text"; > > ... > > CommandFactory::Register<OpenFileCommand>(open_file_command); > CommandFactory::Register<CloseFileCommand>(close_file_command); > CommandFactory::Register<FindTextCommand>(find_text_command); > > ... > > // Loop through macro stream, reading in and executing all commands > std::string cmd_text; > > while (macro_stream.good() && !macro_stream.eof()) > { > macro_stream >> cmd_text; > > Command *cmd = CommandFactory::Create(cmd_text); > > if (cmd) > { > cmd->ExtractParams(macro_stream); > cmd->Execute(); > } > else > { > std::cout << "Unknown command: " << cmd_text << std::endl; > } > } > > ... > > std::cout << "Class OpenFileCommand registered with id " << > CommandFactory::GetClassId<OpenFileCommand, string>() << std::endl; > std::cout << "Class CloseFileCommand registered with id " << > CommandFactory::GetClassId<OpenFileCommand, string>() << std::endl; > std::cout << "Class FindTextCommand registered with id " << > CommandFactory::GetClassId<OpenFileCommand, string>() << std::endl; > > ... > > CommandFactory::Unregister(open_file_command); > CommandFactory::Unregister(close_file_command); > CommandFactory::Unregister(find_text_command); > > _______________________________________________ > Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost > _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
