[jboss-user] [JBoss Seam] - How to write a validator that compares two fields
Hi,
I need to write a JSF validator which compares two fields. It could be used for example to
compare "new password" and "confirm password" fields.
To do this, I wrote the following class :
@Name (value="validator.compareFields")
| @org.jboss.seam.annotations.faces.Validator
|
| public class CompareFieldsValidator implements Validator {
|
| private @In FacesMessages facesMessages;
|
| public void validate(FacesContext context, UIComponent cmp, Object value)
| throws ValidatorException
| {
| String compareTo = (String)
cmp.getAttributes().get("compareTo");
| UIInput input = (UIInput) cmp.findComponent(compareTo);
| String otherValue = (String) input.getSubmittedValue();
| boolean error = false;
| if (value != null) {
| if (! value.equals(otherValue)) error = true;
| }
| else {
| if (otherValue != null) error = true;
| }
| if (error) {
| facesMessages.addToControlFromResourceBundle(cmp.getId(),
"error.fieldsNotEqual", null);
| throw new ValidatorException(new FacesMessage());
| }
| }
| }
Then in my JSF, I use it this way :
<h:outputLabel value="New password :" for="newPassword" />
| <h:inputSecret id="newPassword"
value="#{userCrud.newPassword}">
| <f:validator validatorId="validator.compareFields" />
| <f:attribute name="compareTo" value="confirmPassword"
/>
| </h:inputSecret>
|
| <h:outputLabel value="Confirm password :" for="confirmPassword"
/>
| <h:inputSecret id="confirmPassword"
value="#{userCrud.confirmPassword}" />
It works well except when my inputSecret fields are surrounded by <s:decorate>.
<s:decorate template="/decorateField.xhtml">
| <h:inputSecret id="newPassword"
value="#{userCrud.newPassword}">
| <f:validator validatorId="validator.compareFields" />
| <f:attribute name="compareTo"
value="confirmPassword" />
| </h:inputSecret>
| </s:decorate>
In this case, the UIComponent.findComponent() can't find the field corresponding to
"compareTo" attribute. For what I understood, it works only if the two fields to
compare have the same parent in JSF components tree (while I thought findComponent was
searching recursively the component). Anyone knows how I could make it work ?
Note also that I'm not sure the way I used facesMessages object, especially the way I
throw ValidatorException. I couldn't find an example with message in a resource
bundle. So please tell me if there's a better way to write it.
Thanks in advance
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