How to do validation using MultiActionController

[bdontu]

otherwise write the below function and call validator from with the controlelr



protected Errors bindObject(HttpServletRequest request,
Person personCommand,Validator validator) throws Exception {
Errors errors = new BindException(personCommand,
getCommandName(personCommand));
if (validator.supports(personCommand.getClass())) {
ValidationUtils.invokeValidator(validator, personCommand, errors);
}
logger.error("Errors Count : "+errors.getErrorCount());
return errors;
}

i think tis may help u...

and plz remove the validtor config from displatcher servlet ..

[prande]

I guess that it will not help me ..

my elementBean is the command object which contains ydgElements as property which is another class and it contains the elementTitle

still I tried and I got following error

LoggingInterceptor::afterThrowing Exception in method: handleRequest
Jun 29, 2009 1:20:03 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet ydg threw exception
org.springframework.validation.BindException: org.springframework.validation.BeanPropertyBinding Result: 1 errors
Error in object 'command': codes [error.elementTitleC.command,error.elementTitleC]; arguments []; default message [null]
at org.springframework.web.bind.ServletRequestDataBin der.closeNoCatch(ServletRequestDataBinder.java:121 )

even before calling the submitForm method

Type of varialbe I'm using

BindingResult errors;

[levis]

I think the code is already available in this thread, given by one of our friend jerry, thanks to him. Anyhow I will repaste the code here

The following is my multi action controller,

public class MyController extends MultiActionController
{

BindingResult errors; //Declaring errors as instance variable to catch error


/** My overidden bind() method */

protected void bind(HttpServletRequest request, Object command) throws Exception
{
ServletRequestDataBinder binder = createBinder(request, command);
binder.bind(request);
errors = binder.getBindingResult();
}



/** My validator */

public void MyValidator(Object command)
{
/** Invoking validator **/
Validator[] validators = getValidators();
if (validators != null)
{
for (int index = 0; index < validators.length; index++)
{
Validator validator = validators[index];
if (validator instanceof CustomerInfoValidator)
{
if (((CustomerInfoValidator)validator).supports(comma nd.getClass())) ValidationUtils.invokeValidator(validators[index], command, errors);
}
else if (validator.supports(command.getClass()))
ValidationUtils.invokeValidator(validators[index], command, errors);
}
}
}



/** this is my method handler */

public ModelAndView newcontactHandler(HttpServletRequest request, HttpServletResponse response)
{
if(errors.hasErrors())
{
return new ModelAndView("addcontact",errors.getModel());
}
return new ModelAndView("add-success");
}
}
}

}


I hope this help, If u can't understand let me know...

Hi,
Thnx for your reply, i m sorry i m lilbit late to reply you.. I understood your code but stilll something is missing.. Can you tell me from where are you going to use "newcontactHandler" and moreover cn i hv an overview of bean code and a jsp code so that i cn understand the variable used for binding.
Moreover.. Aren't you implementing the validator interface?
And are these methods written in the controller classes only?
Waiting for your reply
Waiting for your reply
Thnx

[awadhiya]

using BindingResult errors as instance variable can have undesirable consequences, if bean scope is not appropriate. A singleton will be shared across all users, so will be the instance variable.

[prande]

It will be great if somebody will provide some working sample application with all the files for validation in multiactioncontroller if possible provide validation for nested properties

[jerry.yan.mj]

if (null != errors && null != errors.getModel()) {
//check for existance of errors
mav.addObject("errorMap",errors.getModel());
return mav;
}

A better way to do this is the following.
BindingResult errors = getBindingResult(request, yourCommandBean);
if (errors.hasErrors()) {
return new ModelAndView(getFormView(), errors.getModel());
}

[prande]

Hi jerry.yan.mj,

I guess it is only possible with SimpleFormController and we are talking about

MultiActionController

Can you please tell us more..

[jerry.yan.mj]

Hi jerry.yan.mj,

I guess it is only possible with SimpleFormController and we are talking about

MultiActionController

Can you please tell us more..

Please do not jump to the conclusion before you actually try it.

I've been doing this for 3 different projects and it is proven to work fine.

[saravanansivaji]

Points to be noted:

I am using MultiActionController, with InternalPathMethodNameResolver


----------------------------------------------------------------------

my bean class Customer.java

package domain;

public class Customer
{
String firstName;
String surName;

public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getSurName() {
return surName;
}
public void setSurName(String surName) {
this.surName = surName;
}
}

-------------------------------------------------------------------------

my controller CustomerMultiController.java

package controllers;

public class CustomerMultiController extends MultiActionController
{

BindingResult errors;

public BindingResult getErrors() {
return errors;
}

public void setErrors(BindingResult errors) {
this.errors = errors;
}

public ModelAndView stage2_or_3Handler(HttpServletRequest request, HttpServletResponse response)
{
try
{
Customer newCustomer = (Customer)newCommandObject(Customer.class);
bind(request,newCustomer);
validate(newCustomer);

if(errors.hasErrors())
{

return new ModelAndView("Stage1_GetCustomerDetails",errors.ge tModel());
}
else
{
return new ModelAndView("Stage3");
}
catch(Exception expObj)
{
return new ModelAndView("ShowException");
}
}



protected void bind(HttpServletRequest request, Object command) throws Exception
{
ServletRequestDataBinder binder = createBinder(request, command);

binder.bind(request);

errors = binder.getBindingResult();
}


public void validate(Object command)
{
Validator[] validators = getValidators();
if (validators != null)
{
for (int index = 0; index < validators.length; index++)
{
Validator validator = validators[index];
if (validator instanceof CustomerInfoValidator)
{
if (((CustomerInfoValidator)validator).supports(comma nd.getClass()))
ValidationUtils.invokeValidator(validators[index], command, errors);
}

else if (validator.supports(command.getClass()))
ValidationUtils.invokeValidator(validators[index], command, errors);
}
}
}
}


-----------------------------------------------------------------------

my validator CustomerInfoValidator.java

package validation;
import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;

import domain.Customer;

public class CustomerInfoValidator implements Validator
{
public boolean supports(Class cls)
{
return Customer.class.equals(cls);
}

public void validate(Object arg0, Errors arg1)
{
//Is fields are empty validation
ValidationUtils.rejectIfEmpty(arg1, "firstName", "firstName.emptyerror");
ValidationUtils.rejectIfEmpty(arg1, "surName", "surName.emptyerror");
}
}

---------------------------------------------------------------------
here is my messages.properties

firstName.emptyerror=Enter first name.
surName.emptyerror=Enter surname.

-----------------------------------------------------------------------


my customer.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>

<form:form action="stage2_or_3.do">
<table>
<caption align="left"><font color="green"><b>Tell us about yourself</b></font></caption>
<tr>
<td align="left">First Name *</td>
<td></td>
<td></td>
<td></td>
<td align="left"><form:input path="firstName" maxlength="20" size="27"/></td>
<td></td>
<td colspan="2"><form:errors path="firstName" cssClass="errorBox"/></td>
</tr>
<tr></tr>
<tr></tr>

<!-- Field Surname -->
<tr>
<td align="left">Surname *</td>
<td></td>
<td></td>
<td></td>
<td align="left"><form:input path="surName" maxlength="20" size="27"/></td>
<td></td>
<td colspan="2"><form:errors path="surName" cssClass="errorBox"/></td>
</tr>
<!-- Submit button 'Next' -->
<tr></tr>
<tr></tr>
<tr></tr>
<tr>
<td></td>
<td></td>
<td colspan="2">
<input type="submit" value="Next"/>
</td>
</tr>
</table>

</form:form>


</body>
</html>

--------------------------------------------------------------------

finally here is my bean-definition file

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

<!-- ################################ View Resolver ################################ -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.Intern alResourceViewResolver">
<property name="prefix" value="/WEB-INF/jspfiles/"/>
<property name="suffix" value=".jsp"/>
</bean>

<!-- ################################ Handler Mappings ################################ -->
<bean class="org.springframework.web.servlet.handler.Sim pleUrlHandlerMapping">
<property name="mappings">
<value>

/stage2_or_3.do = customerMultiController


</value>
</property>
</bean>


<!-- ################################ Controller of this Insurance application ########## -->
<bean id="customerMultiController" class="controllers.CustomerMultiController">
<property name="methodNameResolver" ref="internalPathMethodNameResolver"/>
<property name="validators">
<list>
<bean class="validation.CustomerInfoValidator"></bean>
<bean class="validation.DependentInfoValidator"></bean>
</list>
</property>
</bean>

<!-- ################################ Defining Validator ################################ -->
<bean id="customerInfoValidator" class="validation.CustomerInfoValidator"/>
<!-- ################################ Defining type of the method name resolver used by the controller ########## -->
<bean id="internalPathMethodNameResolver" class="org.springframework.web.servlet.mvc.multiac tion.InternalPathMethodNameResolver">
<property name="suffix" value="Handler"/>
</bean>

<!-- ################################ Message Source ################################ -->
<bean id="messageSource" class="org.springframework.context.support.Resourc eBundleMessageSource">
<property name="basename" value="messages"/>
</bean>
</beans>

----------------------

I hope this help....Enjoy.....

regards
SARAVANAN SIVAJI

[prande]

Can you please check if your form tag contains attribute commandName?