package org.geogebra.common.kernel.commands;
import org.geogebra.common.kernel.Kernel;
import org.geogebra.common.kernel.arithmetic.Command;
import org.geogebra.common.kernel.geos.GeoElement;
import org.geogebra.common.kernel.geos.GeoNumberValue;
import org.geogebra.common.main.MyError;
/**
* abstract class for Commands with two numberical arguments eg Binomial[
* <Number>, <Number> ] Michael Borcherds 2008-04-12
*/
public abstract class CmdTwoNumFunction extends CommandProcessor {
/**
* Creates new command processor
*
* @param kernel
* kernel
*/
public CmdTwoNumFunction(Kernel kernel) {
super(kernel);
}
@Override
public GeoElement[] process(Command c) throws MyError {
int n = c.getArgumentNumber();
GeoElement[] arg;
switch (n) {
case 2:
arg = resArgs(c);
if ((arg[0] instanceof GeoNumberValue)
&& (arg[1] instanceof GeoNumberValue)) {
GeoElement[] ret = { doCommand(c.getLabel(),
(GeoNumberValue) arg[0], (GeoNumberValue) arg[1]) };
return ret;
}
throw argErr(app, c, arg[0]);
case 3: // return list of results
arg = resArgs(c);
if ((arg[0] instanceof GeoNumberValue)
&& (arg[1] instanceof GeoNumberValue)
&& (arg[2] instanceof GeoNumberValue)) {
GeoElement[] ret = { doCommand2(c, (GeoNumberValue) arg[0],
(GeoNumberValue) arg[1], (GeoNumberValue) arg[2]) };
return ret;
}
throw argErr(app, c, arg[0]);
default:
throw argNumErr(app, c, n);
}
}
/**
* Perform the actual command
*
* @param b
* first number
* @param c
* second number
* @param a
* label
* @return resulting element
*/
abstract protected GeoElement doCommand(String a, GeoNumberValue b,
GeoNumberValue c);
/**
* Perform the actual command
*
* @param c
* command
* @param a
* first arg
* @param b
* second arg
* @param d
* third arg
* @return resulting element
*/
protected GeoElement doCommand2(Command c, GeoNumberValue a,
GeoNumberValue b, GeoNumberValue d) {
throw argNumErr(app, c, 3);
}
}