DataFrameJoinVisitors::DataFrameJoinVisitors(const DataFrame& left_, const DataFrame& right_, const SymbolVector& names_left, const SymbolVector& names_right, bool warn_, bool na_match) :
left(left_), right(right_),
visitor_names_left(names_left),
visitor_names_right(names_right),
visitors(names_left.size()),
warn(warn_)
{
IntegerVector indices_left = names_left.match_in_table(RCPP_GET_NAMES(left));
IntegerVector indices_right = names_right.match_in_table(RCPP_GET_NAMES(right));
const int nvisitors = indices_left.size();
if (indices_right.size() != nvisitors) {
stop("Different size of join column index vectors");
}
for (int i = 0; i < nvisitors; i++) {
const SymbolString& name_left = names_left[i];
const SymbolString& name_right = names_right[i];
if (indices_left[i] == NA_INTEGER) {
stop("'%s' column not found in lhs, cannot join", name_left.get_utf8_cstring());
}
if (indices_right[i] == NA_INTEGER) {
stop("'%s' column not found in rhs, cannot join", name_right.get_utf8_cstring());
}
visitors[i] =
join_visitor(
Column(left[indices_left[i] - 1], name_left),
Column(right[indices_right[i] - 1], name_right),
warn, na_match
);
}
}
DataFrameJoinVisitors::DataFrameJoinVisitors(const Rcpp::DataFrame& left_, const Rcpp::DataFrame& right_, Rcpp::CharacterVector names_left, Rcpp::CharacterVector names_right, bool warn_ ) :
left(left_), right(right_),
visitor_names_left(names_left),
visitor_names_right(names_right),
nvisitors(names_left.size()),
visitors(nvisitors),
warn(warn_)
{
std::string name_left, name_right ;
IntegerVector indices_left = Language( "match", names_left, RCPP_GET_NAMES(left) ).fast_eval() ;
IntegerVector indices_right = Language( "match", names_right, RCPP_GET_NAMES(right) ).fast_eval() ;
for( int i=0; i<nvisitors; i++){
name_left = names_left[i] ;
name_right = names_right[i] ;
if( indices_left[i] == NA_INTEGER ){
stop( "'%s' column not found in lhs, cannot join" ) ;
}
if( indices_right[i] == NA_INTEGER ){
stop( "'%s' column not found in rhs, cannot join" ) ;
}
visitors[i] = join_visitor( left[indices_left[i]-1], right[indices_right[i]-1], name_left, name_right, warn ) ;
}
}
DataFrameSubsetVisitors::DataFrameSubsetVisitors( const Rcpp::DataFrame& data_, const Rcpp::CharacterVector& names ) :
data(data_),
visitors(),
visitor_names(names),
nvisitors(visitor_names.size())
{
std::string name ;
int n = names.size() ;
IntegerVector indices = Language( "match", names, RCPP_GET_NAMES(data) ).fast_eval() ;
for( int i=0; i<n; i++){
int pos = indices[i] ;
if( pos == NA_INTEGER ){
name = (String)names[i] ;
stop( "unknown column '%s' ", name ) ;
}
visitors.push_back(subset_visitor( data[pos-1] )) ;
}
}