hibernate - javax.validation.validationException : 必须创建至少一条自定义消息

Question

根据用hibernate JSR 303 chackCase contraintValidator编写的checkCase约束验证器

public boolean isValid(Group group, ConstraintValidatorContext constraintValidatorContext) {
    boolean isValid = false;
    ...

    if(!isValid) {
        constraintContext.disableDefaultConstraintViolation();
        constraintValidatorContext
            .buildConstraintViolationWithTemplate( "{my.custom.template}" )
            .addNode( "myProperty" ).addConstraintViolation();
    }
    return isValid;
}

在 JSF using 中应用此验证器<f:validateBean>将导致此异常： javax.validation.validationException：如果在使用此验证器时
默认错误消息被禁用，则必须创建至少一条自定义消息

package com.mycompany;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;

public class CheckCaseValidator implements ConstraintValidator<CheckCase, String> {

    private CaseMode caseMode;

    public void initialize(CheckCase constraintAnnotation) {
        this.caseMode = constraintAnnotation.value();
    }

    public boolean isValid(String object, ConstraintValidatorContext constraintContext) {

        if (object == null)
            return true;

        if (caseMode == CaseMode.UPPER)
            return object.equals(object.toUpperCase());
        else
            return object.equals(object.toLowerCase());
    }

}

没有constraintValidatorContext会在<h:messages>