Cool !
Thx

Hello,

fileUpload is a EditableValueHolder true and validate all attach a modelvalidator to it.
But the file upload occur during the update model phase so the data is not validated.

Cheers,
Bruno

I've submitted a patch for UIFileUpload.
http://jira.jboss.com/jira/browse/JBSEAM-1981

With this patch you can use the hibernate validator framework.
For example I've done an Image annotation which check if a byte[] can be read by ImageIO.

@ValidatorClass(ImageValidator.class)
@Target({ElementType.FIELD, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Image {
 String message() default "not a valid image";
}

public class ImageValidator implements Validator<Image> {

 public void initialize(Image parameters) {
 }

 public boolean isValid(Object value) {
 if( value == null ) return true;
 if( ! (value instanceof byte[]) ) return false;

 byte[] data = (byte[])value;

 try {
 BufferedImage img =
 ImageIO.read( new ByteArrayInputStream( data ) );

 return img == null ? false : true;
 } catch (IOException e) {
 return false;
 }
 }
}

@Entity
public class AnEntity {
 @Lob
 @Image
 private byte[] data;

 ...
}

<s:fileUpload id="uplEditedImage" value="#{image.data}"/>