/**
* 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.dynamicproxy;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.util.Set;
import org.hibernate.validator.MethodConstraintViolation;
import org.hibernate.validator.MethodConstraintViolationException;
import org.hibernate.validator.MethodValidator;
/**
* An invocation handler used to test method-level validation.
*
* @author Gunnar Morling
*/
public class ValidationInvocationHandler implements InvocationHandler {
private final Object wrapped;
private final MethodValidator validator;
public ValidationInvocationHandler(Object wrapped, MethodValidator validator) {
this.wrapped = wrapped;
this.validator = validator;
}
@Override
public Object invoke(Object proxy, Method method, Object[] args)
throws Throwable {
Set<MethodConstraintViolation<Object>> constraintViolations = validator
.validateParameters(wrapped, method, args);
if (!constraintViolations.isEmpty()) {
throw new MethodConstraintViolationException(constraintViolations);
}
Object result = method.invoke(wrapped, args);
constraintViolations = validator.validateReturnValue(wrapped, method,
result);
if (!constraintViolations.isEmpty()) {
throw new MethodConstraintViolationException(constraintViolations);
}
return result;
}
}