/*
* 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.ejb3.component.interceptors;
import org.jboss.as.ee.component.ComponentView;
import org.jboss.invocation.Interceptor;
import org.jboss.invocation.InterceptorContext;
import org.jboss.invocation.InterceptorFactory;
import org.jboss.invocation.InterceptorFactoryContext;
/**
* Interceptor for equals / hashCode for SLSB's and Singleton beans
*
* @author Stuart Douglas
*/
public class ComponentTypeIdentityInterceptorFactory implements InterceptorFactory {
public static final ComponentTypeIdentityInterceptorFactory INSTANCE = new ComponentTypeIdentityInterceptorFactory();
private ComponentTypeIdentityInterceptorFactory() {
}
@Override
public Interceptor create(final InterceptorFactoryContext context) {
final ComponentView componentView = (ComponentView) context.getContextData().get(ComponentView.class);
return new ProxyTypeEqualsInterceptor(componentView);
}
private static class ProxyTypeEqualsInterceptor implements Interceptor {
private final ComponentView componentView;
public ProxyTypeEqualsInterceptor(final ComponentView componentView) {
this.componentView = componentView;
}
@Override
public Object processInvocation(final InterceptorContext context) throws Exception {
if ((context.getMethod().getName().equals("equals"))
|| context.getMethod().getName().equals("isIdentical")) {
final Object other = context.getParameters()[0];
if (other == null) {
return false;
}
final Class<?> proxyType = componentView.getProxyClass();
return proxyType.isAssignableFrom(other.getClass());
} else if (context.getMethod().getName().equals("hashCode")) {
//use the identity of the component view as a hash code
return componentView.hashCode();
} else {
return context.proceed();
}
}
}
}