/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* JBoss, Home of Professional Open Source
* Copyright 2008-2012 Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the @authors tag. All rights reserved.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* 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,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
package org.hibernate.search.impl;
import org.hibernate.annotations.common.annotationfactory.AnnotationDescriptor;
import org.hibernate.annotations.common.annotationfactory.AnnotationProxy;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Proxy;
/**
* Creates live annotations (actually <code>AnnotationProxies</code>) from <code>AnnotationDescriptors</code>.
*
* @author Paolo Perrotta
* @author Davide Marchignoli
* @author Emmanuel Bernard <emmanuel@hibernate.org>
*
* @see org.hibernate.annotations.common.annotationfactory.AnnotationProxy
*/
//FIXME remove when HSEARCH-1085 is fixed
class AnnotationFactory {
@SuppressWarnings("unchecked")
public static <T extends Annotation> T create(AnnotationDescriptor descriptor, ClassLoader classLoader) {
//TODO round 34ms to generate the proxy, hug! is Javassist Faster?
//TODO prebuild the javax.persistence and org.hibernate.annotations classes?
Class<T> proxyClass = (Class<T>) Proxy.getProxyClass( classLoader, descriptor.type() );
InvocationHandler handler = new AnnotationProxy( descriptor );
try {
return getProxyInstance( proxyClass, handler );
}
catch (RuntimeException e) {
throw e;
}
catch (Exception e) {
throw new RuntimeException( e );
}
}
private static <T extends Annotation> T getProxyInstance(Class<T> proxyClass, InvocationHandler handler) throws
SecurityException, NoSuchMethodException, IllegalArgumentException, InstantiationException,
IllegalAccessException, InvocationTargetException {
Constructor<T> constructor = proxyClass.getConstructor( new Class[]{InvocationHandler.class} );
return constructor.newInstance( new Object[]{handler} );
}
}