| gvSIG desktop 1

package org.gvsig.operators;

import org.apache.bsf.BSFException;

import org.apache.bsf.BSFManager;

import org.gvsig.baseclasses.AbstractOperator;

import org.gvsig.baseclasses.IOperator;

import org.gvsig.expresions.EvalOperatorsTask;

/**

 * @author Vicente Caballero Navarro

 */

public class Asin extends AbstractOperator{

        public String addText(String s) {

                return toString()+"("+s+")";

        }

        public String toString() {

                return "asin";

        }

        public void eval(BSFManager interpreter) throws BSFException {

//                interpreter.eval(ExpressionFieldExtension.BEANSHELL,null,-1,-1,"double asin(double value){return java.lang.Math.asin(value);};");

                interpreter.exec(EvalOperatorsTask.JYTHON,null,-1,-1,"def asin(value):\n" +

                                "  import java.lang.Math\n" +

                                "  return java.lang.Math.asin(value)");

        }

        public boolean isEnable() {

                return (getType()==IOperator.NUMBER);

        }

        public String getDescription() {

        return "parameter" + ": " +

        "numeric_value" + "\n" +

        "returns" + ": " +

        "numeric_value" + "\n" +

        "description" + ": " +

        "Returns the arc sine of an angle, in the range of -pi/2 through pi/2. Special cases:\n" +

        "* If the argument is NaN or its absolute value is greater than 1, then the result is NaN.\n" +

        "* If the argument is zero, then the result is a zero with the same sign as the argument.\n";

    }

}