struts form validation and sample action

reference : http://j2ee.masslight.com/Chapter7.html

package com.masslight.Employee;

import com.masslight.City.City;
import com.masslight.City.CityHome;

import com.masslight.Department.Department;
import com.masslight.Department.DepartmentHome;

import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.*;

public class EmployeeAddForm extends ActionForm {

 private Integer employeeid = new Integer(0);
 private String firstname = new String();
 private String lastname = new String();
 private String extension = new String();
 private Integer cityid = new Integer(0);
 private Integer departmentid = new Integer(0);

 public EmployeeAddForm() {
 }

 public void reset(ActionMapping mapping, HttpServletRequest request) {
 }

 public ActionErrors validate(ActionMapping mapping, HttpServletRequest request) {
   ActionErrors errors = new ActionErrors();

   // validate fields here

   /*
   try {
     if (getEmployeeid().intValue() == 0) {
       errors.add("employeeid", new ActionError("employee.employeeidrequired"));
     }

     Employee employee = new Employee();
     employee.setEmployeeid(getEmployeeid());
     if (employee.fetch() != false) {
       errors.add("employeeid", new ActionError("employee.employeeidalreadyused"));
     }
   } catch (Exception e) {
     errors.add("employeeid", new ActionError("employee.employeeidrequired"));
   }

   if (getFirstname() == null || getFirstname().length() < 1) {
     errors.add("firstname", new ActionError("employee.firstnamerequired"));
   }

   if (getLastname() == null || getLastname().length() < 1) {
     errors.add("lastname", new ActionError("employee.lastnamerequired"));
   }
   */

   return errors;
 }

 public Integer getEmployeeid() { return employeeid; }
 public void setEmployeeid(Integer value) { employeeid = value; }
 public String getLastname() { return lastname; }
 public void setLastname(String value) { lastname = new String(value); }
 public String getFirstname() { return firstname; }
 public void setFirstname(String value) { firstname = new String(value); }
 public String getExtension() { return extension; }
 public void setExtension(String value) { extension = new String(value); }
 public Integer getDepartmentid() { return departmentid; }
 public void setDepartmentid(Integer value) { departmentid = value; }
 public Integer getCityid() { return cityid; }
 public void setCityid(Integer value) { cityid = value; }

}

//----------------------------------------------------------------------

package com.masslight.Employee;

import com.masslight.City.City;
import com.masslight.City.CityHome;

import com.masslight.Department.Department;
import com.masslight.Department.DepartmentHome;

import java.util.Vector;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Locale;
import java.util.Hashtable;
import java.util.Collection;
import java.util.Properties;
import javax.servlet.*;
import javax.servlet.http.*;
import org.apache.struts.action.*;
import org.apache.struts.util.*;
import javax.rmi.PortableRemoteObject;
import javax.naming.*;

public final class EmployeeAddSetupAction extends Action {

 public EmployeeAddSetupAction() {
 }

 public ActionForward perform(ActionMapping mapping,
                              ActionForm form,
                              HttpServletRequest request,
                              HttpServletResponse response)
   throws IOException, ServletException {

   Locale locale = getLocale(request);
   MessageResources messages = getResources();
   HttpSession session = request.getSession();

   ActionErrors errors = new ActionErrors();

   // insert logic here

   Properties env = new Properties();
   env.setProperty("java.naming.factory.initial", 
		   "org.jnp.interfaces.NamingContextFactory");
   env.setProperty("java.naming.provider.url", "localhost:1099");
   env.setProperty("java.naming.factory.url.pkgs", "org.jboss.naming");

   try {
     InitialContext jndiContext = new InitialContext(env);
     Object ref = jndiContext.lookup("City");
     CityHome home = (CityHome)PortableRemoteObject.narrow(ref, CityHome.class);
     Collection cities = home.findAll();
     session.setAttribute("cities", cities);
   } catch (Exception e1) {
     return (mapping.findForward("employeeaddsetupfailure"));
   }

   try {
     InitialContext jndiContext = new InitialContext(env);
     Object ref = jndiContext.lookup("Department");
     DepartmentHome home = (DepartmentHome)PortableRemoteObject.narrow(
			       ref, DepartmentHome.class);
     Collection departments = home.findAll();
     session.setAttribute("departments", departments);
   } catch (Exception e2) {
     return (mapping.findForward("employeeaddsetupfailure"));
   }

   if (mapping.getAttribute() != null) {

     if ("request".equals(mapping.getScope()))
       request.removeAttribute(mapping.getAttribute());
     else
       session.removeAttribute(mapping.getAttribute());

   }

   return (mapping.findForward("employeeaddsetupsuccess"));

 }


}

//------------------------------------------------------------------------

package com.masslight.Employee;

import com.masslight.City.City;
import com.masslight.City.CityHome;

import com.masslight.Department.Department;
import com.masslight.Department.DepartmentHome;

import java.util.Vector;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Locale;
import java.util.Hashtable;
import java.util.Properties;
import javax.servlet.*;
import javax.servlet.http.*;
import org.apache.struts.action.*;
import org.apache.struts.util.*;
import javax.rmi.PortableRemoteObject;
import javax.naming.*;

public final class EmployeeDeleteAction extends Action {

 public EmployeeDeleteAction() {
 }

 public ActionForward perform(ActionMapping mapping,
                              ActionForm form,
                              HttpServletRequest request,
                              HttpServletResponse response)
   throws IOException, ServletException {

   Locale locale = getLocale(request);
   MessageResources messages = getResources();
   HttpSession session = request.getSession();
   EmployeeDeleteForm employeeDeleteForm = (EmployeeDeleteForm)form;

   ActionErrors errors = new ActionErrors();

   // insert logic here
   Properties env = new Properties();
   env.setProperty("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory");
   env.setProperty("java.naming.provider.url", "localhost:1099");
   env.setProperty("java.naming.factory.url.pkgs", "org.jboss.naming");

   try {
     InitialContext jndiContext = new InitialContext(env);
     Object ref = jndiContext.lookup("Employee");
     EmployeeHome home = (EmployeeHome)PortableRemoteObject.narrow(ref, EmployeeHome.class);
     Employee employee = home.findByPrimaryKey(employeeDeleteForm.getId());
     employee.remove();
   } catch (Exception e) {
     return (mapping.findForward("employeedeletefailure"));
   }

   if (mapping.getAttribute() != null) {

     if ("request".equals(mapping.getScope()))
       request.removeAttribute(mapping.getAttribute());
     else
       session.removeAttribute(mapping.getAttribute());

   }

   return (mapping.findForward("employeedeletesuccess"));

 }


}

//------------------------------------------------------------------------

package com.masslight.Employee;

import com.masslight.City.City;
import com.masslight.City.CityHome;

import com.masslight.Department.Department;
import com.masslight.Department.DepartmentHome;

import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.*;

public class EmployeeDeleteForm extends ActionForm {

 private Integer id;

 public EmployeeDeleteForm() {
 }

 public Integer getId() { return id; }
 public void setId(Integer value) { id = value; }

 public void reset(ActionMapping mapping, HttpServletRequest request) {
 }

 public ActionErrors validate(ActionMapping mapping, HttpServletRequest request) {
   ActionErrors errors = new ActionErrors();

   // validate fields here

   return errors;
 }

//---------------------------------------------------------------------

package com.masslight.Employee;

import com.masslight.City.*;
import com.masslight.Department.*;

import java.util.Vector;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Locale;
import java.util.Hashtable;
import javax.servlet.*;
import javax.servlet.http.*;
import org.apache.struts.action.*;
import org.apache.struts.util.*;
import java.util.Properties;
import javax.rmi.PortableRemoteObject;
import javax.naming.*;

import java.util.Collection;

public final class EmployeeViewAction extends Action {

 public EmployeeViewAction() {
 }

 public ActionForward perform(ActionMapping mapping,
                              ActionForm form,
                              HttpServletRequest request,
                              HttpServletResponse response)
   throws IOException, ServletException {

   Locale locale = getLocale(request);
   MessageResources messages = getResources();
   HttpSession session = request.getSession();

   ActionErrors errors = new ActionErrors();

   // insert logic here

   Properties env = new Properties();
   env.setProperty("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory");
   env.setProperty("java.naming.provider.url", "localhost:1099");
   env.setProperty("java.naming.factory.url.pkgs", "org.jboss.naming");

   try {
     InitialContext jndiContext = new InitialContext(env);
     Object ref = jndiContext.lookup("Employee");
     EmployeeHome home = (EmployeeHome)PortableRemoteObject.narrow(ref, EmployeeHome.class);
     Collection employees = home.findAll();
     session.setAttribute("employees", employees);
   } catch (Exception e) {
     return (mapping.findForward("employeeviewfailure"));
   }

   if (mapping.getAttribute() != null) {

     if ("request".equals(mapping.getScope()))
       request.removeAttribute(mapping.getAttribute());
     else
       session.removeAttribute(mapping.getAttribute());

   }

   return (mapping.findForward("employeeviewsuccess"));

 }

}

}

//------------------------------------------------------------------------------

<?xml version="1.0" encoding="ISO-8859-1" ?>

<!DOCTYPE struts-config PUBLIC
         "-//Apache Software Foundation//DTD Struts Configuration 1.0//EN"
         "http://jakarta.apache.org/struts/dtds/struts-config_1_0.dtd">

<struts-config>

 <!-- ========== Form Bean Definitions =================================== -->
 <form-beans>
   <form-bean name="employeeModifySetupForm"
     type="com.masslight.Employee.EmployeeModifySetupForm"/>
   <form-bean name="employeeModifyForm" type="com.masslight.Employee.EmployeeModifyForm"/>
   <form-bean name="employeeAddForm" type="com.masslight.Employee.EmployeeAddForm"/>
   <form-bean name="employeeDeleteForm" type="com.masslight.Employee.EmployeeDeleteForm"/>
 </form-beans>

 <!-- ========== Global Forward Definitions ============================== -->
 <global-forwards>
   <forward name="employeeaddsetupsuccess" path="/employeeadd.jsp"/>
   <forward name="employeeaddsuccess" path="/employeeaddsuccess.jsp"/>
   <forward name="employeeaddfailure" path="/employeeaddfailure.jsp"/>
   <forward name="employeeviewsuccess" path="/employeeviewsuccess.jsp"/>
   <forward name="employeeviewfailure" path="/employeeviewfailure.jsp"/>
   <forward name="employeedeletesuccess" path="/employeeview.do"/>
   <forward name="employeedeletefailure" path="/employeedeletefailure.jsp"/>
   <forward name="employeemodifysetupsuccess" path="/employeemodify.jsp"/>
   <forward name="employeemodifysuccess" path="/employeeview.do"/>
   <forward name="employeemodifyfailure" path="/employeemodifyfailure.jsp"/>
   <forward name="cityviewsuccess" path="/cityviewsuccess.jsp"/>
   <forward name="cityviewfailure" path="/cityviewfailure.jsp"/>
 </global-forwards>

 <!-- ========== Action Mapping Definitions ============================== -->
 <action-mappings>
   <action path="/employeeaddsetup" type="com.masslight.Employee.EmployeeAddSetupAction"/>
   <action path="/employeeadd" type="com.masslight.Employee.EmployeeAddAction"
     name="employeeAddForm" scope="request" input="/employeeadd.jsp"/>
   <action path="/employeeview" type="com.masslight.Employee.EmployeeViewAction"/>
   <action path="/employeedelete" type="com.masslight.Employee.EmployeeDeleteAction"
     name="employeeDeleteForm" scope="request" input="employeeviewsuccess.jsp"/>
   <action path="/employeemodifysetup"
     type="com.masslight.Employee.EmployeeModifySetupAction"
     name="employeeModifySetupForm" scope="request" input="/employeeviewsuccess.jsp"/>
   <action path="/employeemodify" type="com.masslight.Employee.EmployeeModifyAction"
     name="employeeModifyForm" scope="request" input="/employeemodify.jsp"/>
   <action path="/cityview" type="com.masslight.City.CityViewAction"/>
 </action-mappings>

//-------------------------------------------------------------------------------

<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
 PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
 "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">

<web-app>

 <!-- Action Servlet Configuration -->
 <servlet>
 <servlet-name>action</servlet-name>
 <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
 <init-param>
  <param-name>application</param-name>
  <param-value>ApplicationResources</param-value>
 </init-param>
 <init-param>
  <param-name>config</param-name>
  <param-value>/WEB-INF/struts-config.xml</param-value>
 </init-param>
 <init-param>
  <param-name>debug</param-name>
  <param-value>2</param-value>
 </init-param>
 <init-param>
  <param-name>detail</param-name>
  <param-value>2</param-value>
 </init-param>
 <init-param>
  <param-name>validate</param-name>
  <param-value>true</param-value>
 </init-param>
 <load-on-startup>2</load-on-startup>
 </servlet>

 <!-- Action Servlet Mapping -->
 <servlet-mapping>
 <servlet-name>action</servlet-name>
 <url-pattern>*.do</url-pattern>
 </servlet-mapping>

 <!-- The Welcome File List -->
 <welcome-file-list>
 <welcome-file>index.jsp</welcome-file>
 </welcome-file-list>

 <!-- Application Tag Library Descriptor -->
 <taglib>
 <taglib-uri>/WEB-INF/application.tld</taglib-uri>
 <taglib-location>/WEB-INF/app.tld</taglib-location>
 </taglib>

 <!-- Struts Tag Library Descriptors -->
 <taglib>
 <taglib-uri>/WEB-INF/struts-bean.tld</taglib-uri>
 <taglib-location>/WEB-INF/struts-bean.tld</taglib-location>
 </taglib>

 <taglib>
 <taglib-uri>/WEB-INF/struts-html.tld</taglib-uri>
 <taglib-location>/WEB-INF/struts-html.tld</taglib-location>
 </taglib>

 <taglib>
 <taglib-uri>/WEB-INF/struts-logic.tld</taglib-uri>
 <taglib-location>/WEB-INF/struts-logic.tld</taglib-location>
 </taglib>


</web-app>

</struts-config>