/**
* Copyright 2011 Gunnar Morling (http://www.gunnarmorling.de/)
*
* 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 de.gmorling.methodvalidation.guice;
import java.util.Set;
import javax.validation.ValidatorFactory;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.hibernate.validator.MethodConstraintViolation;
import org.hibernate.validator.MethodConstraintViolationException;
import org.hibernate.validator.MethodValidator;
import com.google.inject.Inject;
public class ValidationInterceptor implements MethodInterceptor {
@Inject
private ValidatorFactory validatorFactory;
@Override
public Object invoke(MethodInvocation invocation) throws Throwable {
MethodValidator validator = validatorFactory.getValidator().unwrap(
MethodValidator.class);
Set<MethodConstraintViolation<Object>> violations = validator
.validateParameters(
invocation.getThis(), invocation.getMethod(),
invocation.getArguments());
if (!violations.isEmpty()) {
throw new MethodConstraintViolationException(violations);
}
Object result = invocation.proceed();
violations = validator.validateReturnValue(
invocation.getThis(),
invocation.getMethod(),
result);
if (!violations.isEmpty()) {
throw new MethodConstraintViolationException(violations);
}
return result;
}
}