How to display Error for a particular text box programaticaly

Question

Hello All,
I have 5 text boxes in a form and I have a requirement where if user click on any of the text boxes then i need to pass the id to class A and show the error description related to that text box in faces message.
I have created class A in which i need to pass the id and get the error description but the problem is that the error description is in array list so i have created list of type class B which contains description.
Right now in class A I have :-
id ||||||||| description <>
it1-------1.Invalid number
-------2.Number not in use
-------3.Number is out of range
it2------1.error1
2.error2
3.error3
and so on.....
*public class ClassA {*
public String Id;
public List<ClassB> desc = new ArrayList();
*public ClassA() {*
super();
*public void setId(String Id) {*
this.Id = Id;
*public String getId() {*
return Id;
*public void setDesc(List<ClassB> desc) {*
this.desc = desc;
*public List<ClassB> getDesc() {*
return desc;
*public class ClassB {*
public String Description;
*public ClassB() {*
super();
*public void setDescription(String Description) {*
this.Description = Description;
*public String getDescription() {*
return Description;
How do I pass the id and get the description for eg:- If id is it1 then How would I show all the 3 errors in faces message on value change.
Please Suggest.
Thanks in advance.

Answer 1

your case is not clear.
but this link may help you
http://mjabr.wordpress.com/2011/08/31/how-to-show-multi-lines-afmessage/