512 lines
16 KiB
C++
512 lines
16 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2007 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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// $Id$
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#include "occi_datasource.hpp"
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#include "occi_featureset.hpp"
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// mapnik
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#include <mapnik/ptree_helpers.hpp>
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#include <mapnik/sql_utils.hpp>
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// boost
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#include <boost/algorithm/string.hpp>
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#include <boost/lexical_cast.hpp>
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#include <boost/tokenizer.hpp>
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// stl
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#include <string>
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#include <algorithm>
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#include <set>
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#include <sstream>
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#include <iomanip>
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using std::clog;
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using std::endl;
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using std::vector;
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using boost::lexical_cast;
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using boost::bad_lexical_cast;
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using mapnik::datasource;
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using mapnik::parameters;
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using mapnik::query;
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using mapnik::featureset_ptr;
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using mapnik::layer_descriptor;
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using mapnik::attribute_descriptor;
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using mapnik::datasource_exception;
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using mapnik::box2d;
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using mapnik::coord2d;
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using oracle::occi::Environment;
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using oracle::occi::Connection;
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using oracle::occi::Statement;
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using oracle::occi::ResultSet;
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using oracle::occi::MetaData;
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using oracle::occi::SQLException;
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using oracle::occi::Type;
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using oracle::occi::StatelessConnectionPool;
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DATASOURCE_PLUGIN(occi_datasource)
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occi_datasource::occi_datasource(parameters const& params, bool bind)
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: datasource (params),
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table_(*params_.get<std::string>("table","")),
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geometry_field_(*params_.get<std::string>("geometry_field","GEOLOC")),
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type_(datasource::Vector),
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extent_initialized_(false),
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row_limit_(*params_.get<int>("row_limit",0)),
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row_prefetch_(*params_.get<int>("row_prefetch",100)),
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desc_(*params_.get<std::string>("type"), *params_.get<std::string>("encoding","utf-8")),
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pool_(0)
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{
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multiple_geometries_ = *params_.get<mapnik::boolean>("multiple_geometries",false);
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use_spatial_index_ = *params_.get<mapnik::boolean>("use_spatial_index",true);
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boost::optional<std::string> ext = params_.get<std::string>("extent");
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if (ext) extent_initialized_ = extent_.from_string(*ext);
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if (bind)
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{
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this->bind();
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}
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}
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void occi_datasource::bind() const
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{
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if (is_bound_) return;
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boost::optional<int> initial_size = params_.get<int>("initial_size",1);
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boost::optional<int> max_size = params_.get<int>("max_size",10);
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// connect to environment
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try
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{
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Environment* env = occi_environment::get_environment();
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pool_ = env->createStatelessConnectionPool(
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*params_.get<std::string>("user"),
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*params_.get<std::string>("password"),
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*params_.get<std::string>("host"),
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*max_size,
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*initial_size,
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1,
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StatelessConnectionPool::HOMOGENEOUS);
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}
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catch (SQLException &ex)
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{
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throw datasource_exception(ex.getMessage());
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}
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std::string table_name = mapnik::table_from_sql(table_);
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// get SRID from geometry metadata
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{
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occi_connection_ptr conn (pool_);
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std::ostringstream s;
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s << "select srid from " << SDO_GEOMETRY_METADATA_TABLE << " where";
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s << " lower(table_name) = lower('" << table_name << "') and";
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s << " lower(column_name) = lower('" << geometry_field_ << "')";
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try
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{
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ResultSet* rs = conn.execute_query (s.str());
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if (rs && rs->next ())
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{
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srid_ = rs->getInt(1);
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}
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}
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catch (SQLException &ex)
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{
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throw datasource_exception(ex.getMessage());
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}
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}
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// get columns description
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{
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std::ostringstream s;
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s << "select * from (" << table_name << ") where rownum < 1";
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occi_connection_ptr conn (pool_);
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try
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{
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ResultSet* rs = conn.execute_query (s.str());
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if (rs)
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{
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std::vector<MetaData> listOfColumns = rs->getColumnListMetaData();
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for (unsigned int i=0;i<listOfColumns.size();++i)
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{
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MetaData columnObj = listOfColumns[i];
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std::string fld_name = columnObj.getString(MetaData::ATTR_NAME);
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int type_oid = columnObj.getInt(MetaData::ATTR_DATA_TYPE);
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#if 0
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int type_code = columnObj.getInt(MetaData::ATTR_TYPECODE);
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if (type_code == OCCI_TYPECODE_OBJECT)
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{
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desc_.add_descriptor(attribute_descriptor(fld_name,mapnik::Object));
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continue;
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}
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#endif
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switch (type_oid)
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{
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case oracle::occi::OCCIINT:
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case oracle::occi::OCCIUNSIGNED_INT:
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desc_.add_descriptor(attribute_descriptor(fld_name,mapnik::Integer));
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break;
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case oracle::occi::OCCIFLOAT:
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case oracle::occi::OCCIBFLOAT:
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case oracle::occi::OCCIDOUBLE:
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case oracle::occi::OCCIBDOUBLE:
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case oracle::occi::OCCINUMBER:
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case oracle::occi::OCCI_SQLT_NUM:
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desc_.add_descriptor(attribute_descriptor(fld_name,mapnik::Double));
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break;
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case oracle::occi::OCCICHAR:
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case oracle::occi::OCCISTRING:
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case oracle::occi::OCCI_SQLT_AFC:
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case oracle::occi::OCCI_SQLT_AVC:
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case oracle::occi::OCCI_SQLT_CHR:
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case oracle::occi::OCCI_SQLT_LVC:
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case oracle::occi::OCCI_SQLT_STR:
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case oracle::occi::OCCI_SQLT_VCS:
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case oracle::occi::OCCI_SQLT_VNU:
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case oracle::occi::OCCI_SQLT_VBI:
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case oracle::occi::OCCI_SQLT_VST:
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case oracle::occi::OCCI_SQLT_RDD:
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desc_.add_descriptor(attribute_descriptor(fld_name,mapnik::String));
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break;
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case oracle::occi::OCCIDATE:
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case oracle::occi::OCCITIMESTAMP:
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case oracle::occi::OCCI_SQLT_DAT:
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case oracle::occi::OCCI_SQLT_TIMESTAMP:
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case oracle::occi::OCCI_SQLT_TIMESTAMP_LTZ:
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case oracle::occi::OCCI_SQLT_TIMESTAMP_TZ:
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case oracle::occi::OCCIPOBJECT:
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#ifdef MAPNIK_DEBUG
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clog << "unsupported type_oid="<<type_oid<<endl;
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#endif
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break;
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default: // shouldn't get here
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#ifdef MAPNIK_DEBUG
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clog << "unknown type_oid="<<type_oid<<endl;
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#endif
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break;
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}
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}
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}
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}
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catch (SQLException &ex)
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{
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throw datasource_exception(ex.getMessage());
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}
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}
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is_bound_ = true;
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}
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occi_datasource::~occi_datasource()
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{
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if (is_bound_)
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{
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Environment* env = occi_environment::get_environment();
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env->terminateStatelessConnectionPool (pool_);
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}
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}
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std::string occi_datasource::name()
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{
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return "occi";
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}
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int occi_datasource::type() const
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{
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return type_;
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}
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box2d<double> occi_datasource::envelope() const
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{
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if (extent_initialized_) return extent_;
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if (!is_bound_) bind();
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double lox, loy, hix, hiy;
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occi_connection_ptr conn (pool_);
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boost::optional<mapnik::boolean> estimate_extent = params_.get<mapnik::boolean>("estimate_extent",false);
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if (estimate_extent && *estimate_extent)
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{
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std::ostringstream s;
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s << "select min(c.x), min(c.y), max(c.x), max(c.y) from ";
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s << " (select sdo_aggr_mbr(" << geometry_field_ << ") shape from " << table_ << ") a, ";
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s << " table (sdo_util.getvertices(a.shape)) c";
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try
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{
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ResultSet* rs = conn.execute_query (s.str());
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if (rs && rs->next ())
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{
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try
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{
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lox = lexical_cast<double>(rs->getDouble(1));
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loy = lexical_cast<double>(rs->getDouble(2));
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hix = lexical_cast<double>(rs->getDouble(3));
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hiy = lexical_cast<double>(rs->getDouble(4));
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extent_.init (lox,loy,hix,hiy);
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extent_initialized_ = true;
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}
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catch (bad_lexical_cast &ex)
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{
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clog << ex.what() << endl;
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}
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}
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}
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catch (SQLException &ex)
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{
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throw datasource_exception(ex.getMessage());
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}
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}
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else if (use_spatial_index_)
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{
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std::string table_name = mapnik::table_from_sql(table_);
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{
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std::ostringstream s;
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s << "select dim.sdo_lb as lx, dim.sdo_ub as ux from ";
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s << SDO_GEOMETRY_METADATA_TABLE << " m, table(m.diminfo) dim ";
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s << " where lower(m.table_name) = '" << table_name << "' and dim.sdo_dimname = 'X'";
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try
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{
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ResultSet* rs = conn.execute_query (s.str());
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if (rs && rs->next ())
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{
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try
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{
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lox = lexical_cast<double>(rs->getDouble(1));
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hix = lexical_cast<double>(rs->getDouble(2));
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}
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catch (bad_lexical_cast &ex)
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{
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clog << ex.what() << endl;
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}
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}
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}
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catch (SQLException &ex)
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{
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throw datasource_exception(ex.getMessage());
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}
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}
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{
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std::ostringstream s;
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s << "select dim.sdo_lb as ly, dim.sdo_ub as uy from ";
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s << SDO_GEOMETRY_METADATA_TABLE << " m, table(m.diminfo) dim ";
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s << " where lower(m.table_name) = '" << table_name << "' and dim.sdo_dimname = 'Y'";
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try
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{
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ResultSet* rs = conn.execute_query (s.str());
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if (rs && rs->next ())
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{
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try
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{
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loy = lexical_cast<double>(rs->getDouble(1));
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hiy = lexical_cast<double>(rs->getDouble(2));
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}
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catch (bad_lexical_cast &ex)
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{
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clog << ex.what() << endl;
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}
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}
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}
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catch (SQLException &ex)
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{
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throw datasource_exception(ex.getMessage());
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}
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}
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extent_.init (lox,loy,hix,hiy);
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extent_initialized_ = true;
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}
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return extent_;
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}
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layer_descriptor occi_datasource::get_descriptor() const
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{
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if (!is_bound_) bind();
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return desc_;
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}
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featureset_ptr occi_datasource::features(query const& q) const
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{
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if (!is_bound_) bind();
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if (pool_)
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{
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box2d<double> const& box=q.get_bbox();
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std::ostringstream s;
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s << "select " << geometry_field_ << " as geom";
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std::set<std::string> const& props=q.property_names();
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std::set<std::string>::const_iterator pos=props.begin();
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std::set<std::string>::const_iterator end=props.end();
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while (pos != end)
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{
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s <<",\""<<*pos<<"\"";
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++pos;
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}
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s << " from ";
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std::string query (table_);
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std::string table_name = mapnik::table_from_sql(query);
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if (use_spatial_index_)
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{
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std::ostringstream spatial_sql;
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spatial_sql << std::setprecision(16);
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spatial_sql << " where sdo_filter(" << geometry_field_ << ",";
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spatial_sql << " mdsys.sdo_geometry(" << SDO_GTYPE_2DPOLYGON << "," << srid_ << ",NULL,";
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spatial_sql << " mdsys.sdo_elem_info_array(1," << SDO_ETYPE_POLYGON << "," << SDO_INTERPRETATION_RECTANGLE << "),";
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spatial_sql << " mdsys.sdo_ordinate_array(";
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spatial_sql << box.minx() << "," << box.miny() << ", ";
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spatial_sql << box.maxx() << "," << box.maxy() << ")), 'querytype=WINDOW') = 'TRUE'";
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if (boost::algorithm::ifind_first(query,"where"))
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{
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boost::algorithm::ireplace_first(query, "where", spatial_sql.str() + " and");
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}
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else if (boost::algorithm::find_first(query,table_name))
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{
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boost::algorithm::ireplace_first(query, table_name , table_name + " " + spatial_sql.str());
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}
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}
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if (row_limit_ > 0)
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{
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std::string row_limit_string = "rownum < " + row_limit_;
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if (boost::algorithm::ifind_first(query,"where"))
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{
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boost::algorithm::ireplace_first(query, "where", row_limit_string + " and");
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}
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else if (boost::algorithm::find_first(query,table_name))
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{
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boost::algorithm::ireplace_first(query, table_name , table_name + " " + row_limit_string);
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}
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}
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s << query;
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#ifdef MAPNIK_DEBUG
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clog << s.str() << endl;
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#endif
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return featureset_ptr (new occi_featureset (pool_,
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s.str(),
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desc_.get_encoding(),
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multiple_geometries_,
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row_prefetch_,
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props.size()));
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}
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return featureset_ptr();
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}
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featureset_ptr occi_datasource::features_at_point(coord2d const& pt) const
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{
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if (!is_bound_) bind();
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if (pool_)
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{
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std::ostringstream s;
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s << "select " << geometry_field_ << " as geom";
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std::vector<attribute_descriptor>::const_iterator itr = desc_.get_descriptors().begin();
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std::vector<attribute_descriptor>::const_iterator end = desc_.get_descriptors().end();
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unsigned size=0;
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while (itr != end)
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{
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s <<",\""<< itr->get_name() << "\"";
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++itr;
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++size;
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}
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s << " from ";
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std::string query (table_);
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std::string table_name = mapnik::table_from_sql(query);
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std::ostringstream spatial_sql;
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spatial_sql << std::setprecision(16);
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spatial_sql << " where sdo_filter(" << geometry_field_ << ",";
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spatial_sql << " mdsys.sdo_geometry(" << SDO_GTYPE_2DPOINT << "," << srid_ << ",NULL,";
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spatial_sql << " mdsys.sdo_elem_info_array(1," << SDO_ETYPE_POINT << "," << SDO_INTERPRETATION_POINT << "),";
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spatial_sql << " mdsys.sdo_ordinate_array(";
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spatial_sql << pt.x << "," << pt.y << ")), 'querytype=WINDOW') = 'TRUE'";
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if (boost::algorithm::ifind_first(query,"where"))
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{
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boost::algorithm::ireplace_first(query, "where", spatial_sql.str() + " and");
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}
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else if (boost::algorithm::find_first(query,table_name))
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{
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boost::algorithm::ireplace_first(query, table_name , table_name + " " + spatial_sql.str());
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}
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if (row_limit_ > 0)
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{
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std::string row_limit_string = "rownum < " + row_limit_;
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if (boost::algorithm::ifind_first(query,"where"))
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{
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boost::algorithm::ireplace_first(query, "where", row_limit_string + " and");
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}
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else if (boost::algorithm::find_first(query,table_name))
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{
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boost::algorithm::ireplace_first(query, table_name , table_name + " " + row_limit_string);
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}
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}
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s << query;
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#ifdef MAPNIK_DEBUG
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clog << s.str() << endl;
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#endif
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return featureset_ptr (new occi_featureset (pool_,
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s.str(),
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desc_.get_encoding(),
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multiple_geometries_,
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row_prefetch_,
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size));
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}
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return featureset_ptr();
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}
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