PLearn 0.1
PLearnCommandRegistry.cc
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00001 // -*- C++ -*-
00002 
00003 // PLearnCommandRegistry.cc
00004 // Copyright (C) 2002 Pascal Vincent
00005 //
00006 // Redistribution and use in source and binary forms, with or without
00007 // modification, are permitted provided that the following conditions are met:
00008 // 
00009 //  1. Redistributions of source code must retain the above copyright
00010 //     notice, this list of conditions and the following disclaimer.
00011 // 
00012 //  2. Redistributions in binary form must reproduce the above copyright
00013 //     notice, this list of conditions and the following disclaimer in the
00014 //     documentation and/or other materials provided with the distribution.
00015 // 
00016 //  3. The name of the authors may not be used to endorse or promote
00017 //     products derived from this software without specific prior written
00018 //     permission.
00019 // 
00020 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
00021 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00022 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
00023 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00024 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00025 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00026 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00027 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00028 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00029 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00030 // 
00031 // This file is part of the PLearn library. For more information on the PLearn
00032 // library, go to the PLearn Web site at www.plearn.org
00033 
00034 
00035 /* *******************************************************      
00036  * $Id: PLearnCommandRegistry.cc 6834 2007-04-05 01:35:37Z saintmlx $
00037  * This file is part of the PLearn library.
00038  ******************************************************* */
00039 
00040 #include "PLearnCommandRegistry.h"
00041 #include <iostream>
00042 #include <vector>
00043 #include <plearn/base/HelpSystem.h>
00044 #include <plearn/io/PStream.h>
00045 
00046 namespace PLearn {
00047 using namespace std;
00048 
00049 PLearnCommandRegistry::command_map& PLearnCommandRegistry::commands()
00050 {
00051     static PLearnCommandRegistry::command_map commands_;
00052     return commands_;
00053 }
00054 
00055 void PLearnCommandRegistry::do_register(PLearnCommand* command)
00056 { commands()[command->name] = command; }
00057 
00058 bool PLearnCommandRegistry::is_registered(const string& commandname)
00059 { return commands().find(commandname)!=commands().end(); }
00060 
00061 /*  
00062 void PLearnCommandRegistry::print_command_summary(ostream& out)
00063 {
00064     command_map::iterator it = commands().begin();
00065     command_map::iterator itend = commands().end();
00066     while(it!=itend)
00067     {
00068         out << it->first << "\t:  " << it->second->description << endl;
00069         ++it;
00070     }
00071     out << endl;
00072 }
00073 */
00074 
00076 void PLearnCommandRegistry::badcommand(const string& commandname)
00077 {
00078     perr << "No '" << commandname << "' command available." << endl;
00079     perr << "Available commands are: " << endl;
00080     //print_command_summary(cerr);
00081     perr << HelpSystem::helpCommands() << flush;
00082     perr << "You can get more help for any of these commands by invoking the help command" << endl;
00083 }
00084 
00085 void PLearnCommandRegistry::run(const string& commandname, const vector<string>& args)
00086 { 
00087     command_map::iterator it = commands().find(commandname);
00088     if(it==commands().end())
00089         badcommand(commandname);
00090     else
00091         it->second->run(args);
00092 }
00093 
00094 PLearnCommand* PLearnCommandRegistry::getCommand(const string& commandname)
00095 {
00096     command_map::iterator it = commands().find(commandname);
00097     if(it==commands().end()) badcommand(commandname);
00098     return it->second;
00099 }
00100 
00101 
00102 /*  
00103 void PLearnCommandRegistry::help(const string& commandname, ostream& out)
00104 { 
00105     command_map::iterator it = commands().find(commandname);
00106     if(it==commands().end())
00107         badcommand(commandname);
00108     else
00109     {
00110         out << "*** Help for command '" << commandname << "' ***" << endl;
00111         out << it->second->description << endl;
00112         out << it->second->helpmsg << endl;        
00113     }
00114 }
00115 */
00116 
00117 } // end of namespace PLearn
00118 
00119 
00120 /*
00121   Local Variables:
00122   mode:c++
00123   c-basic-offset:4
00124   c-file-style:"stroustrup"
00125   c-file-offsets:((innamespace . 0)(inline-open . 0))
00126   indent-tabs-mode:nil
00127   fill-column:79
00128   End:
00129 */
00130 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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