feature_layer_desc.hpp

/*****************************************************************************
 * 
 * This file is part of Mapnik (c++ mapping toolkit)
 *
 * Copyright (C) 2006 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
 *
 *****************************************************************************/

//$Id$

#ifndef FEATURE_LAYER_DESC_HPP
#define FEATURE_LAYER_DESC_HPP

#include <string>
#include <vector>
#include <iostream>

namespace mapnik
{
    
   using std::string;
   using std::vector;
   using std::clog;
    
   enum {
      Integer=1,
      Float  =2,
      Double =3,
      String =4,
      Geometry=5,
      Object=6 
   };
    
   class attribute_descriptor
   {
      public:
         attribute_descriptor(string const& name,unsigned type,
                              bool primary_key=false,
                              int size=-1,
                              int precision=-1)
            : name_(name),
              type_(type),
              primary_key_(primary_key),
              size_(size),
              precision_(precision) {}
	      
         attribute_descriptor(attribute_descriptor const& other)
            : name_(other.name_),
              type_(other.type_),
              primary_key_(other.primary_key_),
              size_(other.size_),
              precision_(other.precision_) {}

         attribute_descriptor& operator=(attribute_descriptor const& other)
         {
            if (this == &other)
               return *this;	    
            name_=other.name_;
            type_=other.type_;
            primary_key_=other.primary_key_;
            size_=other.size_;
            precision_=other.precision_;
            return *this;
         }
         string const& get_name() const
         {
            return name_;
         }
         unsigned  get_type() const
         {
            return type_;
         }
         bool is_primary_key() const
         {
            return primary_key_;
         }
         int get_size() const
         {
            return size_;
         } 
	
         int get_precision() const
         {
            return precision_;
         }
      private:
         string name_;
         int type_;
         bool primary_key_;
         int size_;
         int precision_;
   };
     
   template <typename charT,typename traits>
   inline std::basic_ostream<charT,traits>&
   operator << (std::basic_ostream<charT,traits>& out,
                attribute_descriptor const& ad)
   {
      out << "name=" << ad.get_name() << "\n";
      out << "type=" << ad.get_type() << "\n";
      out << "size=" << ad.get_size() << "\n";
      return out;
   }

   class layer_descriptor 
   {
      public:
         layer_descriptor(string const& name,string const& encoding)
            : name_(name),
              encoding_(encoding) {}

         layer_descriptor(layer_descriptor const& other)
            : name_(other.name_),
              encoding_(other.encoding_),
              desc_ar_(other.desc_ar_) {}
	
         void set_name(string const& name)
         {
            name_=name;
         }
         
         string const& get_name() const
         {
            return name_;
         }
	
         void set_encoding(std::string const& encoding) 
         {
            encoding_=encoding;
         }
	
         std::string const& get_encoding() const
         {
            return encoding_;
         }

         void add_descriptor(attribute_descriptor const& desc)
         {
            desc_ar_.push_back(desc);
         }
	
         vector<attribute_descriptor> const& get_descriptors() const
         {
            return desc_ar_;
         }	
         vector<attribute_descriptor>& get_descriptors()
         {
            return desc_ar_;
         }
      private:
         string name_;
         string encoding_;
         vector<attribute_descriptor> desc_ar_;
   };
    
   template <typename charT,typename traits>
   inline std::basic_ostream<charT,traits>&
   operator << (std::basic_ostream<charT,traits>& out,
                layer_descriptor const& ld)
   {
      out << "name=" << ld.get_name() << "\n";
      out << "encoding=" << ld.get_encoding() << "\n";
      vector<attribute_descriptor> const& desc_ar=ld.get_descriptors();
      vector<attribute_descriptor>::const_iterator pos=desc_ar.begin();
      while (pos != desc_ar.end())
      {
         out << *pos++ << "\n";
	    
      }
      return out;
   }
}

#endif //FEATURE_LAYER_DESC_HPP