/**
* 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.spring;
import java.util.Set;
import javax.inject.Inject;
import javax.validation.Validator;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.reflect.MethodSignature;
import org.hibernate.validator.MethodConstraintViolation;
import org.hibernate.validator.MethodConstraintViolationException;
import org.hibernate.validator.MethodValidator;
/**
* @author Kevin Pollet
*/
@Aspect
public class ValidationInterceptor {
@Inject
private Validator validator;
//Match any public methods in a class annotated with @AutoValidating
@Around("execution(public * *(..)) && @within(de.gmorling.methodvalidation.spring.AutoValidating)")
public Object validateMethodInvocation(ProceedingJoinPoint pjp) throws Throwable {
Object result;
MethodSignature signature = (MethodSignature) pjp.getSignature();
MethodValidator methodValidator = validator.unwrap( MethodValidator.class );
Set<MethodConstraintViolation<Object>> parametersViolations = methodValidator.validateParameters(
pjp.getTarget(), signature.getMethod(), pjp.getArgs()
);
if ( !parametersViolations.isEmpty() ) {
throw new MethodConstraintViolationException( parametersViolations );
}
result = pjp.proceed(); //Execute the method
Set<MethodConstraintViolation<Object>> returnValueViolations = methodValidator.validateReturnValue(
pjp.getTarget(), signature.getMethod(), result
);
if ( !returnValueViolations.isEmpty() ) {
throw new MethodConstraintViolationException( returnValueViolations );
}
return result;
}
}