/*
* JBoss, Home of Professional Open Source
* Copyright 2013, Red Hat Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.connector.util;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.ServiceConfigurationError;
import java.util.ServiceLoader;
import javax.validation.ValidationProviderResolver;
import javax.validation.spi.ValidationProvider;
import org.wildfly.security.manager.WildFlySecurityManager;
/**
* A {@link ValidationProviderResolver} to be used within WildFly. If several BV providers are available,
* {@code HibernateValidator} will be the first element of the returned provider list.
* <p/>
* The providers are loaded via the current thread's context class loader; If no providers are found, the loader of this class
* will be tried as fallback.
* </p>
* Note: This class is a copy of {@code org.jboss.as.ee.beanvalidation.WildFlyProviderResolver}.
*
* @author Hardy Ferentschik
* @author Gunnar Morling
*/
public class WildFlyProviderResolver implements ValidationProviderResolver {
/**
* Returns a list with all {@link ValidationProvider} validation providers.
*
* @return a list with all {@link ValidationProvider} validation providers
*/
@Override
public List<ValidationProvider<?>> getValidationProviders() {
// first try the TCCL
List<ValidationProvider<?>> providers = loadProviders(WildFlySecurityManager.getCurrentContextClassLoaderPrivileged());
if (providers != null && !providers.isEmpty()) {
return providers;
}
// otherwise use the loader of this class
else {
return loadProviders(WildFlySecurityManager.getClassLoaderPrivileged(WildFlyProviderResolver.class));
}
}
/**
* Retrieves the providers from the given loader, using the service loader mechanism.
*
* @param classLoader the class loader to use
* @return a list with providers retrieved via the given loader. May be empty but never {@code null}
*/
private List<ValidationProvider<?>> loadProviders(ClassLoader classLoader) {
@SuppressWarnings("rawtypes")
Iterator<ValidationProvider> providerIterator = ServiceLoader.load(ValidationProvider.class, classLoader).iterator();
LinkedList<ValidationProvider<?>> providers = new LinkedList<ValidationProvider<?>>();
while (providerIterator.hasNext()) {
try {
ValidationProvider<?> provider = providerIterator.next();
// put Hibernate Validator to the beginning of the list
if (provider.getClass().getName().equals("org.hibernate.validator.HibernateValidator")) {
providers.addFirst(provider);
} else {
providers.add(provider);
}
} catch (ServiceConfigurationError e) {
// ignore, because it can happen when multiple
// providers are present and some of them are not class loader
// compatible with our API.
}
}
return providers;
}
}