Create a Validator using .properties file

[Anupam Dee]

I want to create a Validator class e.g PersonValidator that implements Validator interface. I want to get the error messages stored in the .properties file (for Internalization).
I am trying to autowire MessageResource to do the same.

public class PersonValidator implements Validator {

	@Autowired
	MessageSource messageSource;
	
	@Override
	public boolean supports(Class arg0) {
		return Person.class.equals(arg0);
	}

	@Override
	public void validate(Object arg0, Errors arg1) {
		System.out.println(messageSource);
		ValidationUtils.rejectIfEmptyOrWhitespace(arg1, "name", "name.required");
	}

}

this is the xml content
<bean class="org.springframework.context.support.ResourceBundleMessageSource" id="messageSource"> <property name="basenames"> <list> <value>message</value> </list> </property> </bean>

and this is main

public static void main(String[] args) {

		Person p= new Person();
		PersonValidator validator=new PersonValidator();
		ApplicationContext context=new ClassPathXmlApplicationContext("spring.xml");
		BeanPropertyBindingResult result=new BeanPropertyBindingResult(p, "person");
		ValidationUtils.invokeValidator(validator, p, result);
		System.out.println(result.getAllErrors());
		
	}		

and the output is
null
[Field error in object 'person' on field 'name': rejected value [null]; codes [name.required.person.name,name.required.name,name.required.java.lang.String,name.required]; arguments []; default message [null]]

the first null is messageSource getting printed and it is null !
I think i am not able to autowire the messagesource to the .properties file. How should i do it?
Any help would be appreciated.

Thanks in advance.

[Bill Gorder]

MessageSource is null because it is not a Spring managed bean you are creating it using the new operator. Get it from the context instead.

Validator validator= (Validator) context.getBean("personValidator");

Of course you will first have to make sure that the "personValidator" bean is defined in your context and you are wiring the messageSource into it. You could do this by adding an @Component to the PersonValidator class and adding a component scan or you could just wire it up manually.