Application.cc

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/*
 * Application.cc
 *
 * Smalltalk like class library for C++
 * Abstract application.
 *
 * Copyright (c) 2004 Milan Cermak
 */
/*
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include <stlib/tools/Application.h>

#include <stdlib.h>

#include <stlib/Character.h>
#include <stlib/EncodedStream.h>
#include <stlib/ExternalEncodedStreamFactory.h>
#include <stlib/FileAccessor.h>
#include <stlib/GenericException.h>
#include <stlib/tools/CmdLineParserError.h>

using namespace Tools;

Application *Application::_current = nil;

Application::Application(void)
{
    _current = this;
    cin  = (new FileAccessor(0))->withEncoding("default")->readStream();
    cout = (new FileAccessor(1))->withEncoding("default")->writeStream();
    dynamic_cast<EncodedStream *>(cout)->replacementCharacter(Character::value('?'));
    cerr = (new FileAccessor(2))->withEncoding("default")->writeStream();
    dynamic_cast<EncodedStream *>(cerr)->replacementCharacter(Character::value('?'));
}

Application::~Application(void)
{
    _current = nil;
}

/* Class-accessing protocol */
Application *Application::current(void)
{
    return _current;
}

/* Initialize/release protocol */
void Application::initialize(void)
{
    /* Nothing */
}

void Application::initialize(int argc, char **argv)
{
    /* Let the application initialize */
    initialize();
    /* Parse command line arguments */
    CommandLineParser *parser = new CommandLineParser;
    try {
        initializeCommandLineParser(parser);
        parser->process(argc, argv);
    }
    catch (CommandLineParserError *ex) {
        cerr->print(ex);
        cerr->flush();
        exit(1);
    }
}

void Application::initializeCommandLineParser(CommandLineParser *parser)
{
    /* nothing */
}

void Application::release(void)
{
    cout->flush();
    cerr->flush();
}

/* Error handling protocol */
void Application::defaultExceptionHandler(GenericException *ex)
{
    ex->printOn(cerr);
    ex->printStackOn(cerr);
    cerr->flush();
}

/* Processing protocol */
void Application::run(void)
{
    try {
        startUp();
        execute();
        shutDown();
    }
    catch (GenericException *ex) {
        defaultExceptionHandler(ex);
    }
}

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