CmdParseToNumber.java

package org.geogebra.common.kernel.scripting;

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.commands.EvalInfo;
import org.geogebra.common.kernel.geos.GeoElement;
import org.geogebra.common.kernel.geos.GeoNumeric;
import org.geogebra.common.kernel.geos.GeoText;
import org.geogebra.common.main.MyError;

/**
 * ParseToNumber
 */
public class CmdParseToNumber extends CommandProcessor {

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

	@Override
	final public GeoElement[] process(Command c, EvalInfo info) throws MyError {
		if (!info.isScripting()) {
			return new GeoElement[0];
		}
		int n = c.getArgumentNumber();
		GeoElement[] arg;

		boolean ok;

		switch (n) {
		case 2:
			arg = resArgs(c);
			if ((ok = arg[0].isGeoNumeric()) && arg[1].isGeoText()) {

				GeoNumeric num = (GeoNumeric) arg[0];
				String str = ((GeoText) arg[1]).getTextString();

				try {
					kernelA.getAlgebraProcessor().evaluateToDouble(str, true,
							num);
					num.updateCascade();
				} catch (Exception e) {
					num.setUndefined();
					num.updateCascade();
				}

				GeoElement[] ret = { num };
				return ret;
			} else if (!ok) {
				throw argErr(app, c, arg[0]);
			} else {
				throw argErr(app, c, arg[1]);
			}

		default:
			throw argNumErr(app, c, n);
		}
	}
}