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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Definitions required for TableFunction plugin
*
* Copyright (C) 2010 Sun Microsystems
* Copyright (C) 2010 Monty Taylor
*
* 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_TABLE_FUNCTION_H
#define DRIZZLED_PLUGIN_TABLE_FUNCTION_H
#include <drizzled/definitions.h>
#include "drizzled/plugin.h"
#include "drizzled/plugin/plugin.h"
#include "drizzled/table_identifier.h"
#include "drizzled/message/table.pb.h"
#include "drizzled/charset.h"
#include "drizzled/field.h"
#include <string>
#include <set>
#include <algorithm>
namespace drizzled
{
extern int wild_case_compare(const CHARSET_INFO * const cs,
const char *str,const char *wildstr);
namespace plugin
{
// Not thread safe, but plugins are just loaded in a single thread right
// now.
static const char *local_string_append(const char *arg1, const char *arg2)
{
static char buffer[1024];
char *buffer_ptr= buffer;
strcpy(buffer_ptr, arg1);
buffer_ptr+= strlen(arg1);
buffer_ptr[0]= '-';
buffer_ptr++;
strcpy(buffer_ptr, arg2);
return buffer;
}
class TableFunction : public Plugin
{
TableFunction();
TableFunction(const TableFunction &);
TableFunction& operator=(const TableFunction &);
message::Table proto;
TableIdentifier identifier;
std::string local_path;
std::string local_schema;
std::string local_table_name;
std::string original_table_label;
void setName(); // init name
void init();
public:
TableFunction(const char *schema_arg, const char *table_arg) :
Plugin(local_string_append(schema_arg, table_arg) , "TableFunction"),
identifier(schema_arg, table_arg),
original_table_label(table_arg)
{
init();
}
virtual ~TableFunction() {}
static bool addPlugin(TableFunction *function);
static void removePlugin(TableFunction *)
{ }
static TableFunction *getFunction(const std::string &arg);
static void getNames(const std::string &arg,
std::set<std::string> &set_of_names);
enum ColumnType {
BOOLEAN,
NUMBER,
STRING
};
class Generator
{
Field **columns;
Field **columns_iterator;
public:
const CHARSET_INFO *scs;
Generator(Field **arg);
virtual ~Generator()
{ }
/*
Return type is bool meaning "are there more rows".
*/
bool sub_populate(uint32_t field_size);
virtual bool populate()
{
return false;
}
void push(uint64_t arg);
void push(int64_t arg);
void push(const char *arg, uint32_t length= 0);
void push(const std::string& arg);
void push(bool arg);
void push();
bool isWild(const std::string &predicate);
};
void define(message::Table &arg)
{
arg.CopyFrom(proto);
}
const std::string &getTableLabel()
{
return original_table_label;
}
const std::string &getIdentifierTableName()
{
if (local_table_name.empty())
{
local_table_name= identifier.getTableName();
std::transform(local_table_name.begin(), local_table_name.end(),
local_table_name.begin(), ::tolower);
}
return local_table_name;
}
const std::string &getSchemaHome()
{
if (local_schema.empty())
{
local_schema= identifier.getSchemaName();
std::transform(local_schema.begin(), local_schema.end(),
local_schema.begin(), ::tolower);
}
return local_schema;
}
const std::string &getPath()
{
if (local_path.empty())
{
local_path= identifier.getPath();
std::transform(local_path.begin(), local_path.end(),
local_path.begin(), ::tolower);
}
return local_path;
}
virtual Generator *generator(Field **arg);
void add_field(const char *label,
message::Table::Field::FieldType type,
uint32_t length= 0);
void add_field(const char *label,
uint32_t field_length= 64);
void add_field(const char *label,
TableFunction::ColumnType type,
bool is_default_null= true);
void add_field(const char *label,
TableFunction::ColumnType type,
uint32_t field_length,
bool is_default_null= false);
};
} /* namespace plugin */
} /* namespace drizzled */
#endif /* DRIZZLED_PLUGIN_TABLE_FUNCTION_H */
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