DataFrame.h

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// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; indent-tabs-mode: nil; -*-
//
// DataFrame.h: Rcpp R/C++ interface class library -- data frames
//
// Copyright (C) 2010 - 2011 Dirk Eddelbuettel and Romain Francois
//
// This file is part of Rcpp.
//
// Rcpp is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// Rcpp 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Rcpp.  If not, see <http://www.gnu.org/licenses/>.

#ifndef Rcpp__DataFrame_h
#define Rcpp__DataFrame_h

#include <RcppCommon.h>
#include <Rcpp/Vector.h>

namespace Rcpp{
        
    namespace internal{
        inline SEXP empty_data_frame(){
            SEXP dataFrameSym = ::Rf_install( "data.frame"); // cannot be gc()ed once in symbol table
            return ::Rf_eval( ::Rf_lang1( dataFrameSym ), R_GlobalEnv ) ;       
        }
    }
        
    class DataFrame : public List {
    public:     
        DataFrame(): List( internal::empty_data_frame() ){}
                
        DataFrame(SEXP x) : List(){
            set(x) ;
        }
                
        DataFrame( const DataFrame& other): List(other.asSexp()) {}
                
        DataFrame( const RObject::SlotProxy& proxy ) { set(proxy); }
        DataFrame( const RObject::AttributeProxy& proxy ) { set(proxy); }
                
        DataFrame& operator=( DataFrame& other){
            setSEXP( other.asSexp() ) ;
            return *this ;
        }
                
        DataFrame& operator=( SEXP x) {
            set(x) ;
            return *this ;
        }
                
        ~DataFrame(){}

        static DataFrame create(){ return DataFrame() ; }
                
#include <Rcpp/DataFrame_generated.h>           

    private:
        void set(SEXP x) {
            if( ::Rf_inherits( x, "data.frame" )){
                setSEXP( x ) ;
            } else{
                SEXP y = internal::convert_using_rfunction( x, "as.data.frame" ) ;
                setSEXP( y ) ;
            }
        }
        
    } ;
        
}

#endif