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1   /*
2    * JBoss, Home of Professional Open Source
3    * Copyright 2014, Red Hat, Inc. and/or its affiliates, and individual
4    * contributors by the @authors tag. See the copyright.txt in the
5    * distribution for a full listing of individual contributors.
6    *
7    * Licensed under the Apache License, Version 2.0 (the "License");
8    * you may not use this file except in compliance with the License.
9    * You may obtain a copy of the License at
10   * http://www.apache.org/licenses/LICENSE-2.0
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.jboss.as.quickstart.cdi.veto;
18  
19  import java.util.logging.Logger;
20  
21  import javax.enterprise.event.Observes;
22  import javax.enterprise.inject.spi.Extension;
23  import javax.enterprise.inject.spi.ProcessAnnotatedType;
24  import javax.persistence.Entity;
25  
26  /**
27   * Very basic CDI veto extension.
28   */
29  public class VetoExtension implements Extension {
30  
31      private final Logger log = Logger.getLogger("VetoExtension");
32  
33      /**
34       * CDI observer method, listens to the {@link ProcessAnnotatedType} event to apply a veto to all JPA entities.
35       * @param pat Payload of the bootstrap event.
36       */
37      public <T> void vetoEnties(@Observes ProcessAnnotatedType<T> pat) {
38          // Look to see if the AnnotatedType also contains the JPA Entity annotation
39          if (pat.getAnnotatedType().getAnnotation(Entity.class) != null) {
40              // Veto the JPA entity to avoid developers injecting entities without allowing JPA to
41              // manage the entity lifecycle.
42              pat.veto();
43              log.info("Vetoed class " + pat.getAnnotatedType().getJavaClass());
44          }
45      }
46  }