/***************************************************************************** * * This file is part of Mapnik (c++ mapping toolkit) * * Copyright (C) 2011 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 * *****************************************************************************/ #ifndef MAPNIK_SQLITE_PREPARED_HPP #define MAPNIK_SQLITE_PREPARED_HPP // mapnik #include <mapnik/datasource.hpp> #include <mapnik/params.hpp> #include <mapnik/box2d.hpp> // boost #include <boost/shared_ptr.hpp> #include <boost/utility.hpp> // stl #include <string.h> #include "sqlite_connection.hpp" // sqlite extern "C" { #include <sqlite3.h> } class prepared_index_statement : boost::noncopyable { public: prepared_index_statement(boost::shared_ptr<sqlite_connection> ds, std::string const& sql) : ds_(ds), stmt_(0) { const int rc = sqlite3_prepare_v2(*(*ds_), sql.c_str(), -1, &stmt_, 0); if (rc != SQLITE_OK) { std::ostringstream index_error; index_error << "Sqlite Plugin: auto-index table creation failed: '" << sqlite3_errmsg(*(*ds_)) << "' query was: " << sql; throw mapnik::datasource_exception(index_error.str()); } } ~prepared_index_statement() { if (stmt_) { int res = sqlite3_finalize(stmt_); if (res != SQLITE_OK) { if (*(*ds_)) { std::cerr << "ERR:" << sqlite3_errmsg(*(*ds_)) << "\n"; } else { std::cerr << "SQLite Plugin: " << res << "\n"; } } } } void bind(sqlite_int64 const pkid) { if (sqlite3_bind_int64(stmt_, 1, pkid) != SQLITE_OK) { throw mapnik::datasource_exception("SQLite Plugin: invalid value for for key field while generating index"); } } void bind(mapnik::box2d<double> const& bbox) { if ((sqlite3_bind_double(stmt_, 2, bbox.minx()) != SQLITE_OK) || (sqlite3_bind_double(stmt_, 3, bbox.maxx()) != SQLITE_OK) || (sqlite3_bind_double(stmt_, 4, bbox.miny()) != SQLITE_OK) || (sqlite3_bind_double(stmt_, 5, bbox.maxy()) != SQLITE_OK)) { throw mapnik::datasource_exception("SQLite Plugin: invalid value for for extent while generating index"); } } bool step_next () { const int status = sqlite3_step(stmt_); if (status != SQLITE_DONE) { std::ostringstream s; s << "SQLite Plugin: inserting bbox into rtree index failed"; std::string msg(sqlite3_errmsg(sqlite3_db_handle(stmt_))); if (msg != "unknown error") { s << ": " << msg; } throw mapnik::datasource_exception(s.str()); } sqlite3_clear_bindings(stmt_); if (sqlite3_reset(stmt_) != SQLITE_OK) { throw mapnik::datasource_exception("sqlite3_reset failed"); } return true; } private: boost::shared_ptr<sqlite_connection> ds_; sqlite3_stmt * stmt_; }; #endif // MAPNIK_SQLITE_PREPARED_HPP