| gvSIG desktop 1

package org.gvsig.expressionfield.project.documents.table.operators;

import org.apache.bsf.BSFException;

import org.apache.bsf.BSFManager;

import org.gvsig.andami.PluginServices;

import org.gvsig.expressionfield.ExpressionFieldExtension;

import org.gvsig.expressionfield.project.documents.table.AbstractOperator;

import org.gvsig.expressionfield.project.documents.table.IOperator;

/**

 * @author Vicente Caballero Navarro

 */

public class Random extends AbstractOperator{

        public String addText(String s) {

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

        }

        public String toString() {

                return "random";

        }

        public void eval(BSFManager interpreter) throws BSFException {

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

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

                                "  import java.lang.Math\n" +

                                "  return java.lang.Math.random()");

        }

        public boolean isEnable() {

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

        }

        public String getTooltip(){

                return PluginServices.getText(this,"operator")+":  "+addText("")+"\n"+getDescription();

        }

        public String getDescription() {

        return PluginServices.getText(this, "returns") + ": " +

        PluginServices.getText(this, "numeric_value") + "\n" +

        PluginServices.getText(this, "description") + ": " +

        "Returns a double value with a positive sign, greater than or equal to 0.0 and less than 1.0. Returned values are chosen pseudorandomly with (approximately) uniform distribution from that range.";

    }

}