Surely someone has an example of this?
On 18/06/2010, at 12:51 PM, Geoff Callender wrote:
> Thanks, Thiago, but it lacks AJAX. I'd like the validator to behave like any
> other client-side validator except that it asks the server to help, eg. to
> validate that a name has not already been used.
>
> Geoff
>
> On 18/06/2010, at 12:24 PM, Thiago H. de Paula Figueiredo wrote:
>
>> On Thu, 17 Jun 2010 22:20:45 -0300, Geoff Callender
>> <geoff.callender.jumpst...@gmail.com> wrote:
>>
>>> Hi all,
>>
>> Hi!
>>
>> This is an example of a RGB string validator that I created for my Tapestry
>> courses (basic and advanced):
>>
>> public class RGBValidator extends AbstractValidator<Void, String> {
>>
>> final private static Pattern PATTERN =
>> Pattern.compile("[0-9A-Fa-f]{6}");
>>
>> final private RenderSupport renderSupport;
>>
>> final private Asset javascript;
>>
>> public RGBValidator(
>> AssetSource assetSource, RenderSupport renderSupport) {
>>
>> super(null, String.class, "rgb-validation");
>> this.renderSupport = renderSupport;
>> javascript = assetSource.getClasspathAsset(
>>
>> "br/com/arsmachina/cursotapestry/validacao/rgb.js");
>>
>> }
>>
>> public void render(Field field, Void constraintValue,
>> MessageFormatter formatter, MarkupWriter writer,
>> FormSupport formSupport) {
>>
>> String message = buildMessage(field, formatter);
>>
>> // adds JavaScript validation
>> formSupport.addValidation(field, "rgb", message, null);
>>
>> // includes rgb.js in the page
>> renderSupport.addScriptLink(javascript);
>>
>> // adds a hint to the user. just an example of generating
>> // HTML inside a validator.
>> writer.element("span", "class", "hint");
>> writer.write("Must be filled with 6 digits or letters from A to
>> F.");
>> writer.end();
>>
>> }
>>
>> @Override
>> public void validate(Field field, Void constraintValue,
>> MessageFormatter formatter, String value)
>> throws ValidationException {
>>
>> if (PATTERN.matcher(value).matches() == false) {
>> String message = buildMessage(field, formatter);
>> throw new ValidationException(mensagem);
>> }
>>
>> }
>>
>> private String buildMesssage(Field field, MessageFormatter formatter) {
>> return formatter.format(field.getLabel());
>> }
>>
>> }
>>
>> rgb.js:
>>
>> Tapestry.Validator.rgb = function(field, message) {
>> var regexp = /[0-9A-F]{6}/i;
>> field.addValidator(function(value) {
>> if (regexp.test(value) == false && value.length > 0) {
>> throw message;
>> }
>> });
>> };
>>
>> --
>> Thiago H. de Paula Figueiredo
>> Independent Java, Apache Tapestry 5 and Hibernate consultant, developer, and
>> instructor
>> Owner, Ars Machina Tecnologia da Informação Ltda.
>> http://www.arsmachina.com.br
>>
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