Re: Re-use field validations?

[Leo Asanov <le...@yahoo.com>]

Hi!

I was looking for this kind of functionality some time
ago and didn't find any standard way of doing reusable
validators. 
What I did was more like a hack, but it worked:

1. For server side validation.

Overwrite validate() method of FormBean class with
something like this:

public ActionErrors validate(ActionMapping
mapping,HttpServletRequest request) {

ServletContext application =
getServlet().getServletContext();

ActionErrors errors = new ActionErrors();

String validationKey = "validationNameIn
Validation.xml";

Validator validator =
Resources.initValidator(validationKey,this,application,
request,errors, page);

try {validatorResults = validator.validate();} 
catch (ValidatorException e) {
logger.error(e.getMessage(), e);
}
return errors;
}	

Just change validationKey to whatever is in your
validation.xml.

2. Client-side validation.

Put the following code at the top of your page:

<script type="text/javascript">
var
realFormName_required=formNameFromValidationXMLFile_required;

</script>

Again replace "realFormName" with the form name how it
appears in your struts-config.xml. And replace
"formNameFromValidationXMLFile" to the validator name
(should be the same one you used for server-side
validation).

Hope this will help.

Cheers,
Leo

> Quinn Stone wrote:
> > Is there any way to define the validation for a
> common form field once in
> > validation.xml and re-use the validation in other
> <form> blocks?


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RE: Re-use field validations?

["David G. Friedman" <hu...@ix.netcom.com>]

Leo,

You could also check out Niall's server-side validator
add-on to "extend" a field.  Be aware that doesn't work
for client-side Javascript or any version before 1.2.X.
http://www.niallp.pwp.blueyonder.co.uk/strutsvalidatorextends.html
Again, his extension does allow for adding different 
'groups' (one or more from what I've read) of validations
to any <?form....?><?/form?> set.

Regards,
David

-----Original Message-----
From: Leo Asanov [mailto:leonidasanov@yahoo.com]
Sent: Sunday, September 04, 2005 10:56 PM
To: Struts Users Mailing List
Subject: Re: Re-use field validations?


Hi!

I was looking for this kind of functionality some time
ago and didn't find any standard way of doing reusable
validators. 
What I did was more like a hack, but it worked:

1. For server side validation.

Overwrite validate() method of FormBean class with
something like this:

public ActionErrors validate(ActionMapping
mapping,HttpServletRequest request) {

ServletContext application =
getServlet().getServletContext();

ActionErrors errors = new ActionErrors();

String validationKey = "validationNameIn
Validation.xml";

Validator validator =
Resources.initValidator(validationKey,this,application,
request,errors, page);

try {validatorResults = validator.validate();} 
catch (ValidatorException e) {
logger.error(e.getMessage(), e);
}
return errors;
}	

Just change validationKey to whatever is in your
validation.xml.

2. Client-side validation.

Put the following code at the top of your page:

<script type="text/javascript">
var
realFormName_required=formNameFromValidationXMLFile_required;

</script>

Again replace "realFormName" with the form name how it
appears in your struts-config.xml. And replace
"formNameFromValidationXMLFile" to the validator name
(should be the same one you used for server-side
validation).

Hope this will help.

Cheers,
Leo

> Quinn Stone wrote:
> > Is there any way to define the validation for a
> common form field once in
> > validation.xml and re-use the validation in other
> <form> blocks?


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