| 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 Acos extends AbstractOperator{

        public String addText(String s) {

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

        }

        public String toString() {

                return "acos";

        }

        public void eval(BSFManager interpreter) throws BSFException {

                interpreter.exec(EvalOperatorsTask.JYTHON, null, -1, -1,

                    "def acos(value):\n" +

                    "  import java.lang.Math\n"+

                    "  return java.lang.Math.acos(value)\n");

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

        }

        public boolean isEnable() {

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

        }

        public String getDescription() {

        return  "parameter" + ": " +

        "numeric_value" + "\n" +

        "returns" + ": " +

        "numeric_value" + "\n" +

        "description" + ": " +

        "Returns the arc cosine of an angle, in the range of 0.0 through pi. Special case:\n" +

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

    }

}