~drizzle-trunk/drizzle/development : contents of drizzled/plugin/function.h at revision 1991.1.1

~drizzle-trunk/drizzle/development : (revision 1991.1.1)

/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
 *
 *  Copyright (C) 2008 Sun Microsystems
 *
 *  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
 */

#ifndef DRIZZLED_PLUGIN_FUNCTION_H
#define DRIZZLED_PLUGIN_FUNCTION_H


#include "drizzled/plugin/plugin.h"
#include "drizzled/item/func.h"

#include <string>
#include <vector>
#include <functional>

namespace drizzled
{

class Item_func;

namespace memory
{
  class Root;
}

namespace plugin
{

/**
 * Functions in the server: AKA UDF
 */
class Function
  : public Plugin,
    public std::unary_function<memory::Root*, Item_func *>
{
  Function();
  Function(const Function &);
  Function& operator=(const Function &);
public:
  Function(std::string in_name)
   : Plugin(in_name, "Function"),
     std::unary_function<memory::Root*, Item_func *>()
  { }
  virtual result_type operator()(argument_type root) const= 0;
  virtual ~Function() {}

  /**
   * 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);

  /**
   * Accept a new connection (Protocol object) on one of the configured
   * listener interfaces.
   */
  static const plugin::Function *get(const char *name, size_t len=0);

  typedef boost::unordered_map<std::string, const plugin::Function *, util::insensitive_hash, util::insensitive_equal_to> UdfMap;

  static const UdfMap &getMap();
};

template<class T>
class Create_function
 : public Function
{
public:
  typedef T FunctionClass;
  Create_function(std::string in_name)
    : Function(in_name)
  { }
  virtual result_type operator()(argument_type root) const
  {
    return new (root) FunctionClass();
  }
};

} /* namespace plugin */
} /* namespace drizzled */


#endif /* DRIZZLED_PLUGIN_FUNCTION_H */

942.1.12 by Monty Taylor Converted udf_func into a factory.	1	/* -- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; --
	2	* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
	3	*
	4	* Copyright (C) 2008 Sun Microsystems
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; version 2 of the License.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	18	*/
	19
1093.1.62 by Monty Taylor Moved UDFs to slot organization.	20	#ifndef DRIZZLED_PLUGIN_FUNCTION_H
1093.1.62 by Monty Taylor Moved UDFs to slot organization.	21	#define DRIZZLED_PLUGIN_FUNCTION_H
942.1.12 by Monty Taylor Converted udf_func into a factory.	22
942.1.12 by Monty Taylor Converted udf_func into a factory.	23
1130.2.1 by Monty Taylor Introduced plugin::Plugin class. Made Function use it.	24	#include "drizzled/plugin/plugin.h"
1241.10.1 by Monty Taylor Added ability to specify all of the meta information in the plugin.ini file. This allows us to have a streamlined out-of-tree build.	25	#include "drizzled/item/func.h"
1130.1.12 by Monty Taylor Moved service stuff into plugin/	26
942.1.12 by Monty Taylor Converted udf_func into a factory.	27	#include <string>
971.1.23 by Monty Taylor Add generalized registry to be used for case-insensitive mappings.	28	#include <vector>
942.1.12 by Monty Taylor Converted udf_func into a factory.	29	#include <functional>
942.1.12 by Monty Taylor Converted udf_func into a factory.	30
1280.1.10 by Monty Taylor Put everything in drizzled into drizzled namespace.	31	namespace drizzled
	32	{
	33
1241.10.1 by Monty Taylor Added ability to specify all of the meta information in the plugin.ini file. This allows us to have a streamlined out-of-tree build.	34	class Item_func;
1093.1.62 by Monty Taylor Moved UDFs to slot organization.	35
1253.1.3 by Monty Taylor MEM_ROOT == memory::Root	36	namespace memory
	37	{
	38	class Root;
	39	}
	40
1093.1.62 by Monty Taylor Moved UDFs to slot organization.	41	namespace plugin
	42	{
	43
	44	/**
	45	* Functions in the server: AKA UDF
	46	*/
	47	class Function
1130.2.16 by Monty Taylor Cleaned up the constructor initializer lists per Brian.	48	: public Plugin,
1280.1.10 by Monty Taylor Put everything in drizzled into drizzled namespace.	49	public std::unary_function<memory::Root, Item_func >
942.1.12 by Monty Taylor Converted udf_func into a factory.	50	{
1130.2.16 by Monty Taylor Cleaned up the constructor initializer lists per Brian.	51	Function();
	52	Function(const Function &);
	53	Function& operator=(const Function &);
942.1.12 by Monty Taylor Converted udf_func into a factory.	54	public:
1130.2.1 by Monty Taylor Introduced plugin::Plugin class. Made Function use it.	55	Function(std::string in_name)
1192.2.5 by Monty Taylor Replaced overridable virtual methods with passing name to constructor. Now individual plugins will not be allowed to set their own plugin type name. :)	56	: Plugin(in_name, "Function"),
1280.1.10 by Monty Taylor Put everything in drizzled into drizzled namespace.	57	std::unary_function<memory::Root, Item_func >()
1130.2.1 by Monty Taylor Introduced plugin::Plugin class. Made Function use it.	58	{ }
	59	virtual result_type operator()(argument_type root) const= 0;
1093.1.62 by Monty Taylor Moved UDFs to slot organization.	60	virtual ~Function() {}
942.1.12 by Monty Taylor Converted udf_func into a factory.	61
1130.1.12 by Monty Taylor Moved service stuff into plugin/	62	/**
	63	* Add a new Function factory to the list of factories we manage.
	64	*/
1130.1.19 by Monty Taylor Added error reporting to plugin registration.	65	static bool addPlugin(const plugin::Function *function_obj);
1130.1.12 by Monty Taylor Moved service stuff into plugin/	66
	67	/**
	68	* Remove a Function factory from the list of factory we manage.
	69	*/
1130.1.18 by Monty Taylor Changed ::add() and ::remove() to ::addPlugin() and ::removePlugin() so that	70	static void removePlugin(const plugin::Function *function_obj);
1130.1.12 by Monty Taylor Moved service stuff into plugin/	71
	72	/**
	73	* Accept a new connection (Protocol object) on one of the configured
	74	* listener interfaces.
	75	*/
	76	static const plugin::Function get(const char name, size_t len=0);
	77
1751.3.2 by Brian Aker Adding in data dictionary table to list out functions.	78	typedef boost::unordered_map<std::string, const plugin::Function *, util::insensitive_hash, util::insensitive_equal_to> UdfMap;
	79
	80	static const UdfMap &getMap();
942.1.12 by Monty Taylor Converted udf_func into a factory.	81	};
	82
	83	template<class T>
1130.2.1 by Monty Taylor Introduced plugin::Plugin class. Made Function use it.	84	class Create_function
	85	: public Function
942.1.12 by Monty Taylor Converted udf_func into a factory.	86	{
942.1.12 by Monty Taylor Converted udf_func into a factory.	87	public:
1130.2.1 by Monty Taylor Introduced plugin::Plugin class. Made Function use it.	88	typedef T FunctionClass;
	89	Create_function(std::string in_name)
	90	: Function(in_name)
	91	{ }
942.1.12 by Monty Taylor Converted udf_func into a factory.	92	virtual result_type operator()(argument_type root) const
942.1.12 by Monty Taylor Converted udf_func into a factory.	93	{
1130.2.1 by Monty Taylor Introduced plugin::Plugin class. Made Function use it.	94	return new (root) FunctionClass();
942.1.12 by Monty Taylor Converted udf_func into a factory.	95	}
	96	};
	97
1130.2.6 by Monty Taylor Merged in latest plugin-slot-reorg.	98	} /* namespace plugin */
	99	} /* namespace drizzled */
1093.1.62 by Monty Taylor Moved UDFs to slot organization.	100
	101
	102	#endif /* DRIZZLED_PLUGIN_FUNCTION_H */