mapnik/include/mapnik/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 eAttributeType {
    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