In the previous blog entry titled "Writing your own validator" you learned how to write a validator and hook it up for validation. At that time we made it all work using the faces-config.xml file. There is however another way, which we will describe below!
package nohelloworld; @FacesValidator(value="NoHelloWorldValidator") public class NoHelloWorldValidator implements Validator { public void validate(FacesContext context, UIComponent component, Object value) throws ValidatorException if (value != null && "Hello World".equals(value.toString()) { throw new ValidatorException(new FacesMessage( "Hello World is invalid")); } } }
In the faces-config.xml file you had to define the validator-id and the validator-class to register the validator. When using the annotation the value of the FacesValidator annotation defines the validator-id, and the validator-class is going to be the class that was annotated.
Posted September 17, 2012