CmdLimit.java

package org.geogebra.common.kernel.cas;

import org.geogebra.common.kernel.Kernel;
import org.geogebra.common.kernel.arithmetic.Command;
import org.geogebra.common.kernel.commands.CommandProcessor;
import org.geogebra.common.kernel.geos.GeoElement;
import org.geogebra.common.kernel.geos.GeoFunction;
import org.geogebra.common.kernel.geos.GeoNumberValue;
import org.geogebra.common.main.MyError;

/**
 * Limit
 */
public class CmdLimit extends CommandProcessor {

	/**
	 * Create new command processor
	 * 
	 * @param kernel
	 *            kernel
	 */
	public CmdLimit(Kernel kernel) {
		super(kernel);
	}

	@Override
	final public GeoElement[] process(Command c) throws MyError {
		int n = c.getArgumentNumber();
		boolean[] ok = new boolean[c.getArgumentNumber()];
		GeoElement[] arg;
		arg = resArgs(c);

		switch (n) {
		case 2:
			if ((ok[0] = arg[0].isGeoFunction())
					&& (ok[1] = arg[1] instanceof GeoNumberValue)) {

				AlgoLimit algo = new AlgoLimit(cons, c.getLabel(),
						(GeoFunction) arg[0], (GeoNumberValue) arg[1]);

				GeoElement[] ret = { algo.getResult() };
				return ret;
			}
			throw argErr(app, c, getBadArg(ok, arg));
		case 3:
			if ((ok[0] = arg[0].isGeoFunction())
					&& (ok[1] = arg[0].isGeoFunction())
					&& (ok[2] = arg[2] instanceof GeoNumberValue)) {

				AlgoLimit algo = new AlgoLimit(cons, c.getLabel(),
						(GeoFunction) arg[0], (GeoNumberValue) arg[2]);

				GeoElement[] ret = { algo.getResult() };
				return ret;
			}
			throw argErr(app, c, getBadArg(ok, arg));
			// more than one argument
		default:
			throw argNumErr(app, c, n);
		}
	}
}