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//
// VMime library (http://www.vmime.org)
// Copyright (C) 2002 Vincent Richard <vincent@vmime.org>
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 3 of
// the License, or (at your option) any later version.
//
// This program 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
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// Linking this library statically or dynamically with other modules is making
// a combined work based on this library. Thus, the terms and conditions of
// the GNU General Public License cover the whole combination.
//
#ifndef VMIME_UTILITY_ENCODER_ENCODERFACTORY_HPP_INCLUDED
#define VMIME_UTILITY_ENCODER_ENCODERFACTORY_HPP_INCLUDED
#include "vmime/utility/encoder/encoder.hpp"
#include "vmime/utility/stringUtils.hpp"
namespace vmime {
namespace utility {
namespace encoder {
/** A factory to create 'encoder' objects for the specified encoding.
*/
class VMIME_EXPORT encoderFactory
{
private:
encoderFactory();
~encoderFactory();
public:
static shared_ptr <encoderFactory> getInstance();
/** Information about a registered encoder. */
class VMIME_EXPORT registeredEncoder : public object {
protected:
virtual ~registeredEncoder() { }
public:
virtual shared_ptr <encoder> create() const = 0;
virtual const string& getName() const = 0;
};
private:
template <class E>
class registeredEncoderImpl : public registeredEncoder {
public:
registeredEncoderImpl(const string& name) : m_name(name) { }
shared_ptr <encoder> create() const {
return vmime::make_shared <E>();
}
const string& getName() const {
return m_name;
}
private:
const string m_name;
};
std::vector <shared_ptr <registeredEncoder> > m_encoders;
shared_ptr <encoder> m_defaultEncoder;
public:
/** Register a new encoder by its encoding name.
*
* @param name encoding name
*/
template <class E>
void registerName(const string& name) {
m_encoders.push_back(
vmime::make_shared <registeredEncoderImpl <E> >(utility::stringUtils::toLower(name))
);
}
/** Create a new encoder instance from an encoding name.
*
* @param name encoding name (eg. "base64")
* @return a new encoder instance for the specified encoding
* @throw exceptions::no_encoder_available if no encoder is registered
* for this encoding
*/
shared_ptr <encoder> create(const string& name);
/** Return information about a registered encoder.
*
* @param name encoding name
* @return information about this encoder
* @throw exceptions::no_encoder_available if no encoder is registered
* for this encoding
*/
const shared_ptr <const registeredEncoder> getEncoderByName(const string& name) const;
/** Return the number of registered encoders.
*
* @return number of registered encoders
*/
size_t getEncoderCount() const;
/** Return the registered encoder at the specified position.
*
* @param pos position of the registered encoder to return
* @return registered encoder at the specified position
*/
const shared_ptr <const registeredEncoder> getEncoderAt(const size_t pos) const;
/** Return a list of all registered encoders.
*
* @return list of registered encoders
*/
const std::vector <shared_ptr <const registeredEncoder> > getEncoderList() const;
/** Set the default encoder to use when no other encoder
* is registered for an encoding (fallback).
*
* @param enc default encoder
*/
void setDefaultEncoder(const shared_ptr <encoder>& enc);
/** Return the default encoder to use when no other encoder
* is registered for an encoding (fallback).
*
* @return default encoder
*/
shared_ptr <encoder> getDefaultEncoder() const;
};
} // encoder
} // utility
} // vmime
#endif // VMIME_UTILITY_ENCODER_ENCODERFACTORY_HPP_INCLUDED
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