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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2009 Artem Pavlenko
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*****************************************************************************/
#include <mapnik/noncopyable.hpp>
// boost
#include <boost/shared_ptr.hpp>
#include <boost/variant.hpp>
//sqlite3
#include <sqlite3.h>
//stl
//#ifdef MAPNIK_DEBUG
#include <iostream>
//#endif
#include <string>
#include <vector>
namespace mapnik { namespace sqlite {
class database : private mapnik::noncopyable
{
friend class prepared_statement;
struct database_closer
{
void operator () (sqlite3 * db)
{
#ifdef MAPNIK_DEBUG
std::cerr << "close database " << db << "\n";
#endif
sqlite3_close(db);
}
};
typedef boost::shared_ptr<sqlite3> sqlite_db;
sqlite_db db_;
public:
database(std::string const& name);
~database();
bool execute(std::string const& sql);
};
struct null_type {};
struct blob
{
blob(const char* buf, unsigned size)
: buf_(buf), size_(size) {}
const char * buf_;
unsigned size_;
};
typedef boost::variant<int,double,std::string, blob,null_type> value_type;
typedef std::vector<value_type> record_type;
class prepared_statement : mapnik::noncopyable
{
struct binder : public boost::static_visitor<bool>
{
binder(sqlite3_stmt * stmt, unsigned index)
: stmt_(stmt), index_(index) {}
bool operator() (null_type )
{
if (sqlite3_bind_null(stmt_, index_) != SQLITE_OK)
{
std::cerr << "cannot bind NULL\n";
return false;
}
return true;
}
bool operator() (int val)
{
if (sqlite3_bind_int(stmt_, index_ , val ) != SQLITE_OK)
{
std::cerr << "cannot bind " << val << "\n";
return false;
}
return true;
}
bool operator() (double val)
{
if (sqlite3_bind_double(stmt_, index_ , val ) != SQLITE_OK)
{
std::cerr << "cannot bind " << val << "\n";
return false;
}
return true;
}
bool operator() (std::string const& val)
{
if (sqlite3_bind_text(stmt_, index_, val.c_str(), val.length(), SQLITE_STATIC) != SQLITE_OK)
{
std::cerr << "cannot bind " << val << "\n";
return false;
}
return true;
}
bool operator() (blob const& val)
{
if (sqlite3_bind_blob(stmt_, index_, val.buf_, val.size_, SQLITE_STATIC) != SQLITE_OK)
{
std::cerr << "cannot bind BLOB\n";
return false;
}
return true;
}
sqlite3_stmt * stmt_;
unsigned index_;
};
public:
prepared_statement(database & db, std::string const& sql)
: db_(db.db_.get()), stmt_(0)
{
const char * tail;
//char * err_msg;
int res = sqlite3_prepare_v2(db_, sql.c_str(),-1, &stmt_,&tail);
if (res != SQLITE_OK)
{
std::cerr << "ERR:"<< res << "\n";
throw;
}
}
~prepared_statement()
{
int res = sqlite3_finalize(stmt_);
if (res != SQLITE_OK)
{
std::cerr << "ERR:" << res << "\n";
}
}
bool insert_record(record_type const& rec) const
{
#ifdef MAPNIK_DEBUG
assert( unsigned(sqlite3_bind_parameter_count(stmt_)) == rec.size());
#endif
record_type::const_iterator itr = rec.begin();
record_type::const_iterator end = rec.end();
int count = 1;
for (; itr!=end;++itr)
{
binder op(stmt_,count++);
if (!boost::apply_visitor(op,*itr))
{
return false;
}
}
sqlite3_step(stmt_);
sqlite3_reset(stmt_);
return true;
}
private:
sqlite3 * db_;
sqlite3_stmt * stmt_;
};
}
}
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