/*
* Copyright 2004-2005 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springmodules.validation.bean.conf.loader.annotation.handler.hibernate;
import java.beans.PropertyDescriptor;
import java.lang.annotation.Annotation;
import java.lang.reflect.InvocationTargetException;
import org.hibernate.validator.Valid;
import org.hibernate.validator.Validator;
import org.hibernate.validator.ValidatorClass;
import org.springframework.beans.BeanUtils;
import org.springmodules.validation.bean.conf.CascadeValidation;
import org.springmodules.validation.bean.conf.MutableBeanValidationConfiguration;
import org.springmodules.validation.bean.conf.loader.annotation.handler.PropertyValidationAnnotationHandler;
import org.springmodules.validation.bean.rule.DefaultValidationRule;
import org.springmodules.validation.util.condition.AbstractCondition;
import org.springmodules.validation.util.condition.Condition;
import org.springmodules.validation.util.condition.Conditions;
/**
* A {@link org.springmodules.validation.bean.conf.loader.annotation.handler.PropertyValidationAnnotationHandler} that handles Hibernate-Annotation validation annotations.
*
* @author Uri Boness
*/
public class HibernatePropertyValidationAnnotationHandler implements PropertyValidationAnnotationHandler {
/**
* Checks whether the annnotation is one of the annotations defined by hibernate-annotations lib.
*
* @see PropertyValidationAnnotationHandler#supports(java.lang.annotation.Annotation, Class, java.beans.PropertyDescriptor)
*/
public boolean supports(Annotation annotation, Class clazz, PropertyDescriptor descriptor) {
Class annotationClass = annotation.annotationType();
ValidatorClass validatorClassAnnotation = (ValidatorClass) annotationClass.getAnnotation(ValidatorClass.class);
if (validatorClassAnnotation != null) {
return true;
}
if (annotation instanceof Valid) {
return true;
}
return false;
}
/**
* Handles the given property level annotation and manipulates the given bean validation configuration accordingly.
*
* @param annotation The annotation to handle.
* @param clazz The annotated class.
* @param descriptor The property descriptor of the annotated property.
* @param configuration The bean validation configuration to manipulate.
*/
public void handleAnnotation(Annotation annotation, Class clazz, PropertyDescriptor descriptor, MutableBeanValidationConfiguration configuration) {
if (annotation instanceof Valid) {
configuration.addCascadeValidation(new CascadeValidation(descriptor.getName()));
return;
}
Class annotationClass = annotation.annotationType();
ValidatorClass validatorClassAnnotation = (ValidatorClass) annotationClass.getAnnotation(ValidatorClass.class);
Class<? extends Validator> validatorClass = validatorClassAnnotation.value();
Validator validator = (Validator) BeanUtils.instantiateClass(validatorClass);
validator.initialize(annotation);
Condition condition = Conditions.property(descriptor.getName(), new HibernateValidatorCondition(validator));
String message;
try {
message = (String) annotationClass.getMethod("message").invoke(annotation);
} catch (NoSuchMethodException nsme) {
message = annotationClass.getSimpleName() + ".error";
} catch (IllegalAccessException e) {
message = annotationClass.getSimpleName() + ".error";
} catch (InvocationTargetException e) {
message = annotationClass.getSimpleName() + ".error";
}
configuration.addPropertyRule(descriptor.getName(), new DefaultValidationRule(condition, message, message, new Object[0]));
}
/**
* A {@link Condition} implementation that delegates checking to a Hibernate validator.
*/
protected static class HibernateValidatorCondition extends AbstractCondition {
private Validator validator;
public HibernateValidatorCondition(Validator validator) {
this.validator = validator;
}
public boolean doCheck(Object object) {
return validator.isValid(object);
}
}
}