Problem in using multiaction controller in spring

[sachin yadav]

I am trying to use MultiActionController first time. I had a user signup form where i have two buttons one is submit and one is cancel. onclick of submit my data get's inserted into database after validation checks and i want onclick of cancel my parent form i.e. login screen should apprear. If i use simple form controller i can't code cancel button so i try to change my sontroller to multication controller. My Controller is as follows:

 
package com.sachin.login;
 
import javax.servlet.ServletException;
import javax.servlet.http.*;
import com.sachin.login.SignIn;
import org.springframework.validation.BindException;
//import org.springframework.web.servlet.mvc.SimpleFormController;
import org.springframework.web.servlet.mvc.multiaction.MultiActionController;
import org.springframework.web.servlet.ModelAndView;
 
public class SignUpController extends MultiActionController{
 
private SignInDAO signInDao;
 
//checks if a user with same id exists in database
 
public void onBindAndValidate(
            HttpServletRequest request,
            Object command,
            BindException errors) throws Exception{
 
if (errors.hasErrors())return;
SignIn formEmployee = (SignIn) command;
 SignIn dbEmployee = (SignIn) command;
        if ((dbEmployee=signInDao.getCredExist(formEmployee)) != null)
            errors.reject("error.login.exist.invalid");
 
}
 
//should be called on click of button from view where button name is "Submit"
 
public ModelAndView Submit(HttpServletRequest request,
HttpServletResponse response,Object command) {
SignIn data = (SignIn) command;
signInDao.saveDataSheet(data);
return new ModelAndView("successsignup");
}
 
//should be called on click of button from view where button name is "Cancel"
public ModelAndView Cancel(HttpServletRequest request,
HttpServletResponse response) {
return new ModelAndView("signIn");
}
 
public SignInDAO getSignInDao() {
return signInDao;
}
 
public void setSignInDao(SignInDAO signInDao) {
this.signInDao = signInDao;
}
 
}

my configuration file os:

login-servlet.xml

 
<beans>
<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="mappings">
            <props>
    <prop key="/signIn.htm">signInController</prop>
    <prop key="/signupform.htm">signUpController</prop>
            </props>
        </property>
    </bean>
 
        <!-- Validator -->
        <bean id="signUpValidator" class="com.sachin.login.SignUpValidator"/>
      
      <!-- Controller-->
 
     <bean id="signUpController" class="com.sachin.login.SignUpController">
<property name="sessionForm"><value>true</value></property>
<property name="commandName"><value>SignIn</value></property>
<property name="commandClass"><value>com.sachin.login.SignIn</value></property>
<property name="validateOnBinding"><value>true</value></property>
<property name="validator"><ref bean="signUpValidator"/></property>
<property name="formView"><value>signupform</value></property>
<property name="successView"><value>successsignup</value></property>
<property name="bindOnNewForm"><value>false</value></property>
<property name="signInDao"><ref bean="signInDao" /></property>
<property name="methodNameResolver"><ref bean="methodNameResolver"/></property>
</bean>
 
<bean id="methodNameResolver" class="org.springframework.web.servlet.mvc.multiaction.ParameterMethodNameResolver">
<property name="paramName">
<value>action</value>
</property>
</bean>

now when i try to run this i got the following error :

 
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'signUpController' defined in ServletContext resource [/WEB-INF/login-servlet.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'sessionForm' of bean class [com.sachin.login.SignUpController]: Bean property 'sessionForm' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:870)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:624)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:411)
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:245)
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:141)
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:242)
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:156)
org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:642)
org.springframework.web.servlet.handler.AbstractUrlHandlerMapping.registerHandler(AbstractUrlHandlerMapping.java:194)
org.springframework.web.servlet.handler.SimpleUrlHandlerMapping.initApplicationContext(SimpleUrlHandlerMapping.java:98)
org.springframework.context.support.ApplicationObjectSupport.setApplicationContext(ApplicationObjectSupport.java:73)
org.springframework.context.support.ApplicationContextAwareProcessor.postProcessBeforeInitialization(ApplicationContextAwareProcessor.java:86)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:287)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:920)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:415)
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:245)
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:141)
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:242)
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:156)
org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:304)
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:348)
org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.refresh(AbstractRefreshableWebApplicationContext.java:156)
org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:308)
org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:252)
org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:221)
org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:115)
javax.servlet.GenericServlet.init(GenericServlet.java:211)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
java.lang.Thread.run(Unknown Source)

if i use this in the controller then my application loads fine :

 
 <bean id="signUpController" class="com.sachin.login.SignUpController">
<property name="methodNameResolver"><ref bean="methodNameResolver"/></property>
</bean>

but now i have no way to inject validator or command class, hence error whhile submitting the form. Please suggest....