AnnotationMatcher


1   /*
2   * JBoss, Home of Professional Open Source
3   * Copyright 2006, JBoss Inc., and individual contributors as indicated
4   * by the @authors tag. See the copyright.txt in the distribution for a
5   * full listing of individual contributors.
6   *
7   * This is free software; you can redistribute it and/or modify it
8   * under the terms of the GNU Lesser General Public License as
9   * published by the Free Software Foundation; either version 2.1 of
10  * the License, or (at your option) any later version.
11  *
12  * This software is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with this software; if not, write to the Free
19  * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20  * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21  */
22  package org.jboss.metadata.annotation;
23  
24  import java.lang.annotation.Annotation  ;
25  
26  import org.jboss.metadata.spi.retrieval.AnnotationItem;
27  
28  /**
29   * AnnotationMatcher.
30   * 
31   * @author <a HREF="adrian@jboss.com">Adrian Brock</a>
32   * @version $Revision: 57133 $
33   */
34  public final class AnnotationMatcher
35  {
36     /**
37      * Match an annotation
38      * 
39      * @param <T> the annotation type
40      * @param annotations the annotations
41      * @param annotationType the annotation type
42      * @return the matched annotation or null if no match
43      */
44     @SuppressWarnings  ("unchecked")
45     public static final <T extends Annotation  > T matchAnnotation(Annotation  [] annotations, Class  <T> annotationType)
46     {
47        if (annotations != null)
48        {
49           for (Annotation   a : annotations)
50           {
51              if (annotationType.equals(a.annotationType()))
52                 return (T) a;
53           }
54        }
55        
56        return null;
57     }
58  
59     /**
60      * Match an annotation item
61      * 
62      * @param <T> the annotation type
63      * @param annotations the annotation items
64      * @param annotationType the annotation type
65      * @return the matched annotation item or null if no match
66      */
67     @SuppressWarnings  ("unchecked")
68     public static final <T extends Annotation  > AnnotationItem<T> matchAnnotationItem(AnnotationItem[] annotations, Class  <T> annotationType)
69     {
70        if (annotations != null)
71        {
72           for (AnnotationItem item : annotations)
73           {
74              Annotation   a = item.getAnnotation();
75              if (annotationType.equals(a.annotationType()))
76                 return item;
77           }
78        }
79        
80        return null;
81     }
82  }
83
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags