VetoExtension.java

/*
 * JBoss, Home of Professional Open Source
 * Copyright 2013, Red Hat, Inc. and/or its affiliates, and individual
 * contributors by the @authors tag. See the copyright.txt in the
 * distribution for a full listing of individual contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jboss.as.quickstart.cdi.veto;

import java.util.logging.Logger;

import javax.enterprise.event.Observes;
import javax.enterprise.inject.spi.Extension;
import javax.enterprise.inject.spi.ProcessAnnotatedType;
import javax.persistence.Entity;

/**
 * Very basic CDI veto extension.
 */
public class VetoExtension implements Extension {

    private final Logger log = Logger.getLogger("VetoExtension");

    /**
     * CDI observer method, listens to the {@link ProcessAnnotatedType} event to apply a veto to all JPA entities.
     * @param pat Payload of the bootstrap event.
     */
    public void vetoEnties(@Observes ProcessAnnotatedType pat) {
        // Look to see if the AnnotatedType also contains the JPA Entity annotation
        if (pat.getAnnotatedType().getAnnotation(Entity.class) != null) {
            // Veto the JPA entity to avoid developers injecting entities without allowing JPA to
            // manage the entity lifecycle.
            pat.veto();
            log.info("Vetoed class " + pat.getAnnotatedType().getJavaClass());
        }
    }
}