/*
* JBoss, Home of Professional Open Source
* Copyright 2010, 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.ee.beanvalidation;
import org.wildfly.security.manager.WildFlySecurityManager;
import javax.validation.ConstraintValidatorFactory;
import javax.validation.MessageInterpolator;
import javax.validation.ParameterNameProvider;
import javax.validation.TraversableResolver;
import javax.validation.Validation;
import javax.validation.Validator;
import javax.validation.ValidatorContext;
import javax.validation.ValidatorFactory;
/**
* This class lazily initialize the ValidatorFactory on the first usage One benefit is that no domain class is loaded until the
* ValidatorFactory is really needed. Useful to avoid loading classes before JPA is initialized and has enhanced its classes.
*
* @author Emmanuel Bernard
* @author Stuart Douglas
*/
public class LazyValidatorFactory implements ValidatorFactory {
private final ClassLoader classLoader;
private volatile ValidatorFactory delegate; // use as a barrier
public LazyValidatorFactory(ClassLoader classLoader) {
this.classLoader = classLoader;
}
private ValidatorFactory getDelegate() {
ValidatorFactory result = delegate;
if (result == null) {
synchronized (this) {
result = delegate;
if (result == null) {
delegate = result = initFactory();
}
}
}
return result;
}
public void replaceDelegate(ValidatorFactory validatorFactory) {
synchronized (this) {
delegate = validatorFactory;
}
}
@Override
public Validator getValidator() {
return getDelegate().getValidator();
}
private ValidatorFactory initFactory() {
final ClassLoader oldTCCL = WildFlySecurityManager.getCurrentContextClassLoaderPrivileged();
try {
WildFlySecurityManager.setCurrentContextClassLoaderPrivileged(classLoader);
return Validation.byDefaultProvider().providerResolver(new WildFlyProviderResolver()).configure()
.buildValidatorFactory();
} finally {
WildFlySecurityManager.setCurrentContextClassLoaderPrivileged(oldTCCL);
}
}
@Override
public ValidatorContext usingContext() {
final ClassLoader oldTCCL = WildFlySecurityManager.getCurrentContextClassLoaderPrivileged();
try {
// Make sure the deployment's CL is set
WildFlySecurityManager.setCurrentContextClassLoaderPrivileged(classLoader);
return getDelegate().usingContext();
} finally {
WildFlySecurityManager.setCurrentContextClassLoaderPrivileged(oldTCCL);
}
}
@Override
public MessageInterpolator getMessageInterpolator() {
return getDelegate().getMessageInterpolator();
}
@Override
public TraversableResolver getTraversableResolver() {
return getDelegate().getTraversableResolver();
}
@Override
public ConstraintValidatorFactory getConstraintValidatorFactory() {
return getDelegate().getConstraintValidatorFactory();
}
@Override
public ParameterNameProvider getParameterNameProvider() {
return getDelegate().getParameterNameProvider();
}
@Override
public <T> T unwrap(Class<T> clazz) {
return getDelegate().unwrap(clazz);
}
@Override
public void close() {
// Avoid initializing delegate if closing it
if (delegate != null) {
getDelegate().close();
}
}
}