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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.quickstarts.cdi.decorator;
18  
19  import java.util.logging.Logger;
20  
21  import javax.decorator.Decorator;
22  import javax.decorator.Delegate;
23  import javax.inject.Inject;
24  
25  /**
26   * CDI decorator class.
27   * 
28   * The {@link Decorator} qualifier tells CDI this is a decorator of the {@link StaffService}.
29   * 
30   * We inject {@link StaffService} and identify the delegate injection point of a decorator, using {@link Delegate} annotation.
31   * By default decorators are disabled. So this class will not be touched. To activate decorator, it must be specified in
32   * beans.xml descriptor.
33   * 
34   * @author Ievgen Shulga
35   */
36  @Decorator
37  public abstract class StaffServiceDecorator implements StaffService {
38  
39      @Inject
40      @Delegate
41      private StaffService staffService;
42      private final Logger log = Logger.getLogger(StaffServiceDecorator.class.getName());
43  
44      /**
45       * We wrap {@link StaffServiceImpl#getStaff()} method of delegate object and decorate it with additional functionality. In
46       * this case after call to delegated method, we change {@link Staff} attributes and log information.
47       * 
48       */
49      @Override
50      public Staff getStaff() {
51          Staff staff = staffService.getStaff();
52          staff.setBonus(200);
53          staff.setPosition("Team Lead");
54          log.info("CDI decorator method was called!");
55          return staff;
56      }
57  
58  }