/* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
#include <map>
#include <string>

#include "ImageLoader.h"
#include "ImageLoaderImpl.h"
#include "ImageLoaderFactory.h"
#include "Trace.h"

ImageLoaderFactory *ImageLoaderFactory::_instance = NULL;

ImageLoaderFactory::ImageLoaderFactory()
{
}

ImageLoaderFactory *ImageLoaderFactory::getInstance()
{
    if (_instance == NULL) {
        _instance = new ImageLoaderFactory();
    }

    return _instance;
}

void ImageLoaderFactory::addLoaderImpl(const std::string& ext, ImageLoaderImpl *loaderImpl)
{
    std::map<std::string, ImageLoaderImpl *>::iterator iter;
    iter = _loaderImpls.find(ext);
    if (iter == _loaderImpls.end()) {
        _loaderImpls[ext] = loaderImpl;
    } else {
        TRACE("conflicting data loader for .%s files\n", ext.c_str());
        return;
    }
}

ImageLoader *ImageLoaderFactory::createLoader(const std::string& ext)
{
    std::map<std::string, ImageLoaderImpl *>::iterator iter;
    iter = _loaderImpls.find(ext);
    if (iter != _loaderImpls.end()) {
        ImageLoader *imageLoader = new ImageLoader();
        imageLoader->setLoaderImpl((*iter).second);
        return imageLoader;
    } else {
        TRACE("%s file not supported\n", ext.c_str());
    }
    return 0;
}