On Thu, 17 Jun 2010 23:51:40 -0300, Geoff Callender
<geoff.callender.jumpst...@gmail.com> 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.
Yep, I just noticed you wanted an AJAX example after I hit "send". :P
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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--
Thiago H. de Paula Figueiredo
Independent Java, Apache Tapestry 5 and Hibernate consultant, developer,
and instructor
Owner, Ars Machina Tecnologia da Informação Ltda.
Consultor, desenvolvedor e instrutor em Java, Tapestry e Hibernate
Coordenador e professor da Especialização em Engenharia de Software com
Ênfase em Java da Faculdade Pitágoras
http://www.arsmachina.com.br
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