| gvSIG desktop 1

package com.iver.cit.gvsig.project.documents.table.operators;

import org.apache.bsf.BSFException;

import org.apache.bsf.BSFManager;

import com.iver.andami.PluginServices;

import com.iver.cit.gvsig.ExpressionFieldExtension;

import com.iver.cit.gvsig.project.documents.table.AbstractOperator;

import com.iver.cit.gvsig.project.documents.table.IOperator;

/**

 * @author Vicente Caballero Navarro

 */

public class IsNumber extends AbstractOperator{

        public String addText(String s) {

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

        }

        public String toString() {

                return "isNumber";

        }

        public void eval(BSFManager interpreter) throws BSFException {

//                interpreter.eval(ExpressionFieldExtension.BEANSHELL,null,-1,-1,"boolean isNumber (String value){try{java.lang.Double.parseDouble(value);}catch(java.lang.NumberFormatException e){return false;}return true;};");

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

                                "  import java.lang.Double\n" +

                                "  import java.lang.NumberFormatException\n" +

                                "  try:\n" +

                                "    java.lang.Double.parseDouble(value)\n" +

                                "  except java.lang.NumberFormatException:\n" +

                                "    return 0==1 #false\n" +

                                "  return 1==1 #true\n");

        }

        public boolean isEnable() {

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

        }

        public String getDescription() {

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

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

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

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

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

            "Returns true if the string parameter is a number.";

        }

}