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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems, Inc.
*
* 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; version 2 of the License.
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#pragma once
#include <drizzled/item/func.h>
#include <drizzled/plugin.h>
#include <drizzled/plugin/plugin.h>
#include <string>
#include <vector>
#include <functional>
#include <boost/unordered_map.hpp>
#include <drizzled/visibility.h>
namespace drizzled {
namespace plugin {
/**
* Functions in the server: AKA UDF
*/
class DRIZZLED_API Function : public Plugin
{
public:
Function(std::string in_name) : Plugin(in_name, "Function")
{ }
virtual Item_func* operator()(memory::Root*) const= 0;
/**
* Add a new Function factory to the list of factories we manage.
*/
static bool addPlugin(const plugin::Function *function_obj);
/**
* Remove a Function factory from the list of factory we manage.
*/
static void removePlugin(const plugin::Function *function_obj);
static const plugin::Function *get(const std::string &name);
typedef boost::unordered_map<std::string, const plugin::Function *, util::insensitive_hash, util::insensitive_equal_to> UdfMap;
typedef boost::unordered_map<std::string, const plugin::Function *, util::insensitive_hash, util::insensitive_equal_to> Map;
static const UdfMap &getMap();
};
template<class T>
class Create_function : public Function
{
public:
Create_function(const std::string& in_name) : Function(in_name)
{
}
virtual Item_func* operator()(memory::Root* root) const
{
return new (*root) T();
}
};
} /* namespace plugin */
} /* namespace drizzled */
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