package org.nfunk.jep.function;

import java.util.Stack;
import org.nfunk.jep.ParseException;
import org.nfunk.jep.type.Complex;

public class Exp extends PostfixMathCommand {
  public void run(Stack paramStack) throws ParseException {
    checkStack(paramStack);
    Object object = paramStack.pop();
    paramStack.push(exp(object));
  }
  
  public Object exp(Object paramObject) throws ParseException {
    if (paramObject instanceof Complex) {
      Complex complex = (Complex)paramObject;
      double d1 = complex.re();
      double d2 = complex.im();
      double d3 = Math.exp(d1);
      return new Complex(d3 * Math.cos(d2), d3 * Math.sin(d2));
    } 
    if (paramObject instanceof Number)
      return new Double(Math.exp(((Number)paramObject).doubleValue())); 
    throw new ParseException("Invalid parameter type");
  }
}