java类javax.validation.ConstraintValidator的实例源码

protected ConstraintDescriptorImpl(final T annotation, final Set<Class<?>> groups,
    final Set<Class<? extends Payload>> payload,
    final List<Class<? extends ConstraintValidator<T, ?>>> constraintValidatorClasses,
    final Map<String, Object> attributes, final Set<ConstraintDescriptor<?>> composingConstraints,
    final boolean reportAsSingleViolation, final ElementType elementType,
    final ConstraintOrigin definedOn) {
  super();
  this.annotation = annotation;
  this.groups = groups;
  this.payload = payload;
  this.constraintValidatorClasses = constraintValidatorClasses;
  this.attributes = attributes;
  this.composingConstraints = composingConstraints;
  this.reportAsSingleViolation = reportAsSingleViolation;
  this.elementType = elementType;
  this.definedOn = definedOn;
}

/**
 * Finds the type that a constraint validator will check.
 *
 * <p>
 * This type comes from the first parameter of the isValid() method on the constraint validator.
 * However, this is a bit tricky because ConstraintValidator has a parameterized type. When using
 * Java reflection, we will see multiple isValid() methods, including one that checks
 * java.lang.Object.
 * </p>
 *
 * <p>
 * Strategy: for now, assume there are at most two isValid() methods. If there are two, assume one
 * of them has a type that is assignable from the other. (Most likely, one of them will be
 * java.lang.Object.)
 * </p>
 *
 * @throws IllegalStateException if there isn't any isValid() method or there are more than two.
 */
static <T extends Annotation> Class<?> getTypeOfConstraintValidator(
    final Class<? extends ConstraintValidator<T, ?>> constraintClass) {

  int candidateCount = 0;
  Class<?> result = null;
  for (final Method method : constraintClass.getMethods()) {
    if (method.getName().equals("isValid") && method.getParameterTypes().length == 2
        && method.getReturnType().isAssignableFrom(Boolean.TYPE)) {
      final Class<?> firstArgType = method.getParameterTypes()[0];
      if (result == null || result.isAssignableFrom(firstArgType)) {
        result = firstArgType;
      }
      candidateCount++;
    }
  }

  if (candidateCount == 0) {
    throw new IllegalStateException("ConstraintValidators must have a isValid method");
  } else if (candidateCount > 2) {
    throw new IllegalStateException(
        "ConstraintValidators must have no more than two isValid methods");
  }

  return result;
}

static <A extends Annotation> ImmutableSet<Class<? extends ConstraintValidator<A, ?>>> //
    getValidatorForType(final Class<?> ptype,
        final List<Class<? extends ConstraintValidator<A, ?>>> constraintValidatorClasses) {
  final Class<?> type = Primitives.wrap(ptype);
  final Map<Class<?>, Class<? extends ConstraintValidator<A, ?>>> map = Maps.newHashMap();
  for (final Class<? extends ConstraintValidator<A, ?>> conClass : constraintValidatorClasses) {
    final Class<?> aType = Primitives.wrap(getTypeOfConstraintValidator(conClass));
    if (aType.isAssignableFrom(type)) {
      map.put(aType, conClass);
    }
  }
  // TODO(nchalko) implement per spec
  // Handle Arrays and Generics

  final Set<Class<?>> best = Util.findBestMatches(type, map.keySet());

  final Predicate<Class<?>> inBest = key -> best.contains(key);
  return ImmutableSet.copyOf(Maps.filterKeys(map, inBest).values());
}

/**
 * Gets the best {@link ConstraintValidator}.
 *
 * <p>
 * The ConstraintValidator chosen to validate a declared type {@code targetType} is the one where
 * the type supported by the ConstraintValidator is a supertype of {@code targetType} and where
 * there is no other ConstraintValidator whose supported type is a supertype of {@code type} and
 * not a supertype of the chosen ConstraintValidator supported type.
 * </p>
 *
 * @param constraint the constraint to find ConstraintValidators for.
 * @param targetType The type to find a ConstraintValidator for.
 * @return ConstraintValidator
 *
 * @throws UnexpectedTypeException if there is not exactly one maximally specific constraint
 *         validator for targetType.
 */
private static <A extends Annotation> Class<? extends ConstraintValidator<A, ?>> //
    getValidatorForType(final ConstraintDescriptor<A> constraint, final Class<?> targetType)
        throws UnexpectedTypeException {
  final List<Class<? extends ConstraintValidator<A, ?>>> constraintValidatorClasses =
      constraint.getConstraintValidatorClasses();
  if (constraintValidatorClasses.isEmpty()) {
    throw new UnexpectedTypeException(
        "No ConstraintValidator found for  " + constraint.getAnnotation());
  }
  final ImmutableSet<Class<? extends ConstraintValidator<A, ?>>> best =
      getValidatorForType(targetType, constraintValidatorClasses);
  if (best.isEmpty()) {
    throw new UnexpectedTypeException(
        "No " + constraint.getAnnotation() + " ConstraintValidator for type " + targetType);
  }
  if (best.size() > 1) {
    throw new UnexpectedTypeException("More than one maximally specific "
        + constraint.getAnnotation() + " ConstraintValidator for type " + targetType + ", found "
        + Ordering.usingToString().sortedCopy(best));
  }
  return Iterables.get(best, 0);
}

@Bean
public LocalValidatorFactoryBean localValidatorFactoryBean() {
    HibernateValidatorConfigurationStrategy strategy = Optional.ofNullable(hibernateValidatorConfigurationStrategy)
                                                               .orElseGet(() -> configuration -> {
                                                               });
    List<? extends ConstraintValidator> validators = Optional.ofNullable(this.validators)
                                                             .orElseGet(Collections::emptyList);
    return new CustomLocalValidatorFactoryBean(strategy, validators);
}

private void addConstraint(ConstraintMapping mapping, ConstraintValidator validator) {
    Stream.of(validator.getClass().getGenericInterfaces())
          .filter(genericInterface -> genericInterface instanceof ParameterizedType)
          .map(genericInterface -> (ParameterizedType) genericInterface)
          .filter(genericInterface -> isConstraintValidator(genericInterface.getRawType()))
          .forEach(constraintValidatorInterface -> {
              @SuppressWarnings("unchecked")
              Class<? extends Annotation> a = (Class<? extends Annotation>) constraintValidatorInterface.getActualTypeArguments()[0];
              mapping.constraintDefinition(a).validatedBy(getValidatorClass(validator));
          });
}

private JDefinedClass buildTemplateConstraintValidator(String name, JDefinedClass constraint, Class<?> param) {
    try {
        JClass cv = (JClass) codeModel._ref(ConstraintValidator.class);
        cv = cv.narrow(constraint, (JClass) codeModel._ref(param));
        JDefinedClass validator = constraint._class(JMod.STATIC | JMod.PUBLIC, name);
        validator._implements(cv);
        validator.method(JMod.PUBLIC, void.class, "initialize").param(constraint, "parameters");
        JMethod isValid = validator.method(JMod.PUBLIC, boolean.class, "isValid");
        isValid.param(Object.class, "value");
        isValid.param(ConstraintValidatorContext.class, "context");
        return validator;
    } catch (JClassAlreadyExistsException e) {
        throw new RuntimeException("Tried to create an already existing class: " + name, e);
    }
}

@SuppressWarnings({ "rawtypes", "unchecked" })
private <T> void validatePropertyConstraints(
        final MinijaxConstraintValidatorContext<T> context,
        final PropertyDescriptor property,
        final Object value) {

    for (final ConstraintDescriptor constraint : property.getConstraintDescriptors()) {
        final ConstraintValidator validator = ((MinijaxConstraintDescriptor) constraint).getValidator();
        if (!validator.isValid(value, context)) {
            context.buildViolation(constraint, value);
        }
    }
}

@SuppressWarnings("rawtypes")
private <T> void validatePropertyElementConstraints(
        final MinijaxConstraintValidatorContext<T> context,
        final PropertyDescriptor property,
        final Object value) {

    for (final ContainerElementTypeDescriptor descriptor : property.getConstrainedContainerElementTypes()) {
        for (final ConstraintDescriptor constraint : descriptor.getConstraintDescriptors()) {
            final ConstraintValidator validator = ((MinijaxConstraintDescriptor) constraint).getValidator();

            if (value instanceof List) {
                validateList(context, constraint, validator, (List) value);

            } else if (value instanceof Iterable) {
                validateIterable(context, constraint, validator, (Iterable) value);

            } else if (value instanceof Map && descriptor.getTypeArgumentIndex() == 0) {
                validateMapKeys(context, constraint, validator, (Map<?, ?>) value);

            } else if (value instanceof Map) {
                validateMapValues(context, constraint, validator, (Map<?, ?>) value);

            } else if (value instanceof Optional) {
                validateOptional(context, constraint, validator, (Optional) value);
            }
        }
    }
}

@SuppressWarnings({ "rawtypes", "unchecked" })
private <T> void validateList(
        final MinijaxConstraintValidatorContext<T> context,
        final ConstraintDescriptor constraint,
        final ConstraintValidator validator,
        final List list) {

    for (int i = 0; i < list.size(); i++) {
        if (!validator.isValid(list.get(i), context)) {
            context.buildViolation(constraint, list.get(i), "[" + i + "].<list element>");
        }
    }
}

@SuppressWarnings({ "rawtypes", "unchecked" })
private <T> void validateIterable(
        final MinijaxConstraintValidatorContext<T> context,
        final ConstraintDescriptor constraint,
        final ConstraintValidator validator,
        final Iterable iterable) {

    for (final Object element : iterable) {
        if (!validator.isValid(element, context)) {
            context.buildViolation(constraint, element, "[].<iterable element>");
        }
    }
}

@SuppressWarnings({ "rawtypes", "unchecked" })
private <T> void validateMapKeys(
        final MinijaxConstraintValidatorContext<T> context,
        final ConstraintDescriptor constraint,
        final ConstraintValidator validator,
        final Map<?, ?> map) {

    for (final Object element : map.keySet()) {
        if (!validator.isValid(element, context)) {
            context.buildViolation(constraint, element, "<K>[].<map key>");
        }
    }
}

@SuppressWarnings({ "rawtypes", "unchecked" })
private <T> void validateMapValues(
        final MinijaxConstraintValidatorContext<T> context,
        final ConstraintDescriptor constraint,
        final ConstraintValidator validator,
        final Map<?, ?> map) {

    for (final Entry<?, ?> entry : map.entrySet()) {
        if (!validator.isValid(entry.getValue(), context)) {
            context.buildViolation(constraint, entry.getValue(), "[" + entry.getKey() + "].<map value>");
        }
    }
}

@SuppressWarnings({ "rawtypes", "unchecked" })
private <T> void validateOptional(
        final MinijaxConstraintValidatorContext<T> context,
        final ConstraintDescriptor constraint,
        final ConstraintValidator validator,
        final Optional optional) {

    if (optional.isPresent() && !validator.isValid(optional.get(), context)) {
        context.buildViolation(constraint, optional.get());
    }
}

@SuppressWarnings({ "unchecked", "rawtypes" })
private static <T extends Annotation> MinijaxConstraintDescriptor<T> buildDeclaredValidator(final T annotation, final Class validatedBy) {
    final Class<? extends ConstraintValidator<T, ?>> c = validatedBy;
    try {
        return new MinijaxConstraintDescriptor<>(annotation, c.getConstructor().newInstance());
    } catch (final ReflectiveOperationException ex) {
        throw new ValidationException(ex);
    }
}

@Override
public <T extends ConstraintValidator<?, ?>> T getInstance(Class<T> type) {
  T result = null;
  try {
    result = this.beanFactory.getBean(type);
  } catch(BeansException e) {
    // ignore, as we initialize the validator below
  }
  if( result == null ) {
    result = this.delegate.getInstance(type);
    this.beanFactory.initializeBean(result, result.getClass() + "#" + result.hashCode());
  }
  return result;
}

@Test
public void test() {
    final ConstraintValidatorContext context = mock(ConstraintValidatorContext.class);
    final ConstraintViolationBuilder builder = mock(ConstraintViolationBuilder.class);
    final NodeBuilderCustomizableContext node = mock(NodeBuilderCustomizableContext.class);
    when(context.buildConstraintViolationWithTemplate(anyString())).thenReturn(builder);
    when(builder.addPropertyNode(anyString())).thenReturn(node);
    mockCountToReturn(2l);
    final ConstraintValidator<Unique, Object> validator = new UniqueValidator();
    final Unique annotation = Model2.class.getAnnotation(Unique.class);
    validator.initialize(annotation);
    assertFalse(validator.isValid("somevalue", context));
}

/**
 * setter for constraint validator class.
 *
 * @param constraintValidatorClasses value to set
 * @return this class
 */
public Builder<T> setConstraintValidatorClasses(
    final Class<? extends ConstraintValidator<T, ?>>[] constraintValidatorClasses) {
  final List<Class<? extends ConstraintValidator<T, ?>>> list =
      Arrays.asList(constraintValidatorClasses);
  this.setConstraintValidatorClasses(list);
  return this;
}

/**
 * Perform the actual validation of a single {@link ConstraintValidator}.
 * <p>
 * As a side effect {@link ConstraintViolation}s may be added to {@code violations}.
 * </p>
 *
 * @return true if there was any constraint violations
 */
protected <A extends Annotation, T, V> boolean validate(final GwtValidationContext<T> context,
    final Set<ConstraintViolation<T>> violations, final G object, final V value,
    final ConstraintValidator<A, ? super V> validator,
    final ConstraintDescriptorImpl<A> constraintDescriptor, final Class<?>... groups) {
  validator.initialize(constraintDescriptor.getAnnotation());
  final ConstraintValidatorContextImpl<A, V> constraintValidatorContext =
      context.createConstraintValidatorContext(constraintDescriptor);

  final List<Class<?>> groupsList = Arrays.asList(groups);
  final ValidationGroupsMetadata validationGroupsMetadata =
      context.getValidator().getValidationGroupsMetadata();
  final Set<Class<?>> constraintGroups = constraintDescriptor.getGroups();

  // check groups requested are in the set of constraint groups (including the implicit group)
  if (!this.containsAny(groupsList, constraintGroups)
      && !groupsList.contains(this.getConstraints(validationGroupsMetadata).getElementClass())) {
    return false;
  }

  if (!validator.isValid(value, constraintValidatorContext)) {
    this.addViolations(//
        context, //
        violations, //
        object, //
        value, //
        constraintDescriptor, //
        constraintValidatorContext);
    return true;
  }
  return false;
}

private void writeClassLevelConstraintsValidation(final SourceWriter sw,
    final String groupsVarName) throws UnableToCompleteException {
  // all class level constraints
  int count = 0;
  final Class<?> clazz = this.beanHelper.getClazz();
  for (final ConstraintDescriptor<?> constraint : this.beanHelper.getBeanDescriptor()
      .getConstraintDescriptors()) {
    if (this.areConstraintDescriptorGroupsValid(constraint)) {
      if (this.hasMatchingAnnotation(constraint)) {

        if (!constraint.getConstraintValidatorClasses().isEmpty()) { // NOPMD
          final Class<? extends ConstraintValidator<? extends Annotation, ?>> validatorClass =
              getValidatorForType(constraint, clazz);

          // validate(context, violations, null, object,
          sw.print("validate(context, violations, null, object, ");

          // new MyValidtor(),
          sw.print("new ");
          sw.print(validatorClass.getCanonicalName());
          sw.print("(), "); // TODO(nchalko) use ConstraintValidatorFactory

          // this.aConstraintDescriptor, groups);
          sw.print(this.constraintDescriptorVar("this", count));
          sw.print(", ");
          sw.print(groupsVarName);
          sw.println(");");
        } else if (constraint.getComposingConstraints().isEmpty()) {
          // TODO(nchalko) What does the spec say to do here.
          this.logger.log(TreeLogger.WARN,
              "No ConstraintValidator of " + constraint + " for type " + clazz);
        }
        // TODO(nchalko) handle constraint.isReportAsSingleViolation() and
        // hasComposingConstraints
      }
      count++;
    }
  }
}

protected ConstraintDescriptorImpl(final T pannotation, final Set<Class<?>> pgroups,
    final Set<Class<? extends Payload>> ppayload,
    final List<Class<? extends ConstraintValidator<T, ?>>> pconstraintValidatorClasses,
    final Map<String, Object> pattributes,
    final Set<ConstraintDescriptor<?>> pcomposingConstraints,
    final boolean preportAsSingleViolation, final ElementType pelementType,
    final ConstraintOrigin pdefinedOn) {
  super(pannotation, pgroups, ppayload, pconstraintValidatorClasses, pattributes,
      pcomposingConstraints, preportAsSingleViolation, pelementType, pdefinedOn);
}

private boolean processViolations(Set<ConstraintViolation<Object>> violations, Class<? extends ConstraintValidator> validator) {
    boolean result = false;
    for (ConstraintViolation<Object> violation : violations) {
        List<?> validatorClasses = violation.getConstraintDescriptor().getConstraintValidatorClasses();
        if (validatorClasses.contains(validator)) {
            showMessage(violation.getMessage());
            result = true;
        }
    }
    return result;
}

public static List<Class<? extends ConstraintValidator<?, ?>>> getBeanConstraintValidator(String annotationName) {
    List<Class<? extends ConstraintValidator<?, ?>>> result = new ArrayList<>();
    try {
        Class<?> annotationClass = Class.forName(annotationName);
        result = getBeanConstraintValidator(annotationClass);
    } catch (ClassNotFoundException e) {
        ; // TODO At least log this, probably some class loading issue that we have to solve
    }
    return result;

}

private static List<Class<? extends ConstraintValidator<?, ?>>> getBeanConstraintValidator(Class annotationClass) {
    Constraint annotation = (Constraint) annotationClass.getAnnotation(Constraint.class);

    List<Class<? extends ConstraintValidator<?, ?>>> result = new ArrayList<>();
    if (annotation != null) {
        result = Arrays.asList(annotation.validatedBy());
    }

    return result;

}

public static List<RecordValueInfo> getClassLevelBeanValidationInfo(Class clazz) {
    List<RecordValueInfo> result = new ArrayList<>();

    for (Annotation annotation : clazz.getDeclaredAnnotations()) {
        List<Class<? extends ConstraintValidator<?, ?>>> beanValidationConstraints = getBeanConstraintValidator(annotation.annotationType());
        for (Class<? extends ConstraintValidator<?, ?>> validationConstraint : beanValidationConstraints) {
            result.add(new RecordValueInfo(clazz, validationConstraint));
        }
    }

    if (!Object.class.equals(clazz.getSuperclass())) {
        result.addAll(getClassLevelBeanValidationInfo(clazz.getSuperclass()));
    }
    return result;
}

@Override
public boolean isValid(List<?> entries,
        ConstraintValidatorContext context) {
    boolean valid = true;

    if(entries == null){
        return valid;
    }

    if(ArrayUtils.getLength(constraints) != ArrayUtils.getLength(messages)){
        throw new ConstraintDeclarationException("Number of messages must be the same as number of constraints");
    }

    ValidatorFactory validatorFactory = Validation.buildDefaultValidatorFactory();
    ConstraintValidatorFactory constraintValidatorFactory = validatorFactory.getConstraintValidatorFactory();

    for(Object element : entries) {
        for(Class<?> constraint : constraints) {
            Constraint constraintAnnotation = constraint.getAnnotation(Constraint.class);
            Class<? extends ConstraintValidator<?, ?>>[] constraintValidators = constraintAnnotation.validatedBy();
            for (int i = 0; i < constraintValidators.length; i++) {
                ConstraintValidator constraintValidator = constraintValidatorFactory.getInstance(constraintValidators[i]);
                if(!constraintValidator.isValid(element, context)){
                    context.buildConstraintViolationWithTemplate(messages[i]).addConstraintViolation().disableDefaultConstraintViolation();
                    valid = false;
                }
            }
        }

    }

    return valid;
}

@Override
public <T extends ConstraintValidator<?, ?>> T getInstance(Class<T> key) {
  try {
    String beanName = getBeanName(key);
    if (!beanFactory.isPrototype(beanName)) {
      String msg = "Bean [%s] must be of prototype scope.";
      throw new IllegalArgumentException(String.format(msg, beanName));
    }
    return beanFactory.getBean(beanName, key);
  } catch (NoSuchElementException e) {
    // The factory does not know about the bean it creates it.
    return beanFactory.createBean(key);
  }
}

@Override
public <T extends ConstraintValidator<?, ?>> T getInstance(final Class<T> key) {
    /* By default, all beans are in prototype scope, so new instance will be obtained each time.
     Validator implementer may declare it as singleton and manually maintain internal state
     (to re-use validators and simplify life for GC) */
    return injector.getInstance(key);
}

@Override
public void releaseInstance(final ConstraintValidator<?, ?> instance) {
  if (instance instanceof Closeable) {
    try {
      ((Closeable) instance).close();
    } catch (IOException ex) {
      log.debug("Can't close constraint validator", ex);
    }
  }
}

@Test
public void getInstance() throws Exception {
  new MockUnit(Injector.class, ConstraintValidator.class)
      .expect(unit -> {
        Injector injector = unit.get(Injector.class);
        expect(injector.getInstance(ConstraintValidator.class)).andReturn(
            unit.get(ConstraintValidator.class));
      })
      .run(unit -> {
        assertEquals(unit.get(ConstraintValidator.class),
            new HbvConstraintValidatorFactory(unit.get(Injector.class))
                .getInstance(ConstraintValidator.class));
      });
}