| 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 E extends AbstractOperator{

        public String addText(String s) {

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

        }

        public String toString() {

                return "e";

        }

        public void eval(BSFManager interpreter) throws BSFException {

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

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

                                "  import java.lang.Math\n" +

                                "  return java.lang.Math.E");

        }

        public boolean isEnable() {

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

        }

        public String getTooltip(){

                return "operator"+":  "+addText("")+"\n"+getDescription();

        }

        public String getDescription() {

        return  "returns" + ": " +

         "numeric_value" + "\n" +

         "description" + ": " +

        "The double value that is closer than any other to e, the base of the natural logarithms.";

    }

}