/*
* Hibernate Search, full-text search for your domain model
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.search.engine.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
*
* @see org.hibernate.annotations.common.annotationfactory.AnnotationProxy
*/
//FIXME remove when HSEARCH-1085 is fixed
class AnnotationFactory {
private AnnotationFactory() {
//now allowed
}
@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
NoSuchMethodException, InstantiationException,
IllegalAccessException, InvocationTargetException {
Constructor<T> constructor = proxyClass.getConstructor( new Class[]{InvocationHandler.class} );
return constructor.newInstance( new Object[]{handler} );
}
}