/*
* R : A Computer Language for Statistical Data Analysis
* Copyright (C) 1995, 1996 Robert Gentleman and Ross Ihaka
* Copyright (C) 1997--2008 The R Development Core Team
* Copyright (C) 2003, 2004 The R Foundation
* Copyright (C) 2010 bedatadriven
*
* This program 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 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.renjin.primitives.special;
import org.renjin.eval.Context;
import org.renjin.eval.EvalException;
import org.renjin.primitives.Primitives;
import org.renjin.sexp.Environment;
import org.renjin.sexp.Function;
import org.renjin.sexp.FunctionCall;
import org.renjin.sexp.Null;
import org.renjin.sexp.PairList;
import org.renjin.sexp.SEXP;
import org.renjin.sexp.SpecialFunction;
import org.renjin.sexp.Symbol;
public class InternalFunction extends SpecialFunction {
public InternalFunction() {
super(".Internal");
}
@Override
public SEXP apply(Context context, Environment rho, FunctionCall call, PairList args) {
SEXP arg = call.getArgument(0);
assert arg!=null;
if(!(arg instanceof FunctionCall)) {
throw new EvalException("invalid .Internal() argument");
}
FunctionCall internalCall = (FunctionCall) arg;
Symbol internalName = (Symbol)internalCall.getFunction();
SEXP function = Primitives.getInternal(internalName);
if(function==null || function == Null.INSTANCE) {
throw new EvalException(String.format("no internal function \"%s\"", internalName.getPrintName()));
}
return ((Function)function).apply(context, rho, internalCall, internalCall.getArguments());
}
}