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Java > Open Source Codes > com > sun > enterprise > deployment > annotation > introspection > AnnotationScanner


1 /*
2  * The contents of this file are subject to the terms
3  * of the Common Development and Distribution License
4  * (the License). You may not use this file except in
5  * compliance with the License.
6  *
7  * You can obtain a copy of the license at
8  * https://glassfish.dev.java.net/public/CDDLv1.0.html or
9  * glassfish/bootstrap/legal/CDDLv1.0.txt.
10  * See the License for the specific language governing
11  * permissions and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL
14  * Header Notice in each file and include the License file
15  * at glassfish/bootstrap/legal/CDDLv1.0.txt.
16  * If applicable, add the following below the CDDL Header,
17  * with the fields enclosed by brackets [] replaced by
18  * you own identifying information:
19  * "Portions Copyrighted [year] [name of copyright owner]"
20  *
21  * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
22  */
23 package com.sun.enterprise.deployment.annotation.introspection;
24
25 import java.nio.channels.ReadableByteChannel JavaDoc;
26 import java.nio.ByteBuffer JavaDoc;
27 import java.io.IOException JavaDoc;
28
29 import java.util.Set JavaDoc;
30 import java.util.HashSet JavaDoc;
31 import java.util.List JavaDoc;
32 import java.util.Vector JavaDoc;
33
34 import com.sun.enterprise.deployment.annotation.factory.SJSASFactory;
35
36
37 /**
38  * This class contains the list of all annotations types name
39  * which can be present at the class level (Type.TYPE).
40  *
41  * @author Jerome Dochez
42  */
43 public class AnnotationScanner {
44
45     private static Set JavaDoc<String JavaDoc> annotations=null;
46     
47     /** Creates a new instance of AnnotationScanner */
48     private AnnotationScanner() {
49     }
50         
51     /**
52      * Test if the passed constant pool string is a reference to
53      * a Type.TYPE annotation of a J2EE component
54      *
55      * @String the constant pool info string
56      * @return true if it is a J2EE annotation reference
57      */
58     public static boolean isAnnotation(String JavaDoc value) {
59         if (annotations==null) {
60             synchronized(AnnotationScanner.class) {
61                 if (annotations==null)
62                    init();
63             }
64         }
65         return annotations.contains(value);
66     }
67     
68     private static void init() {
69         annotations = SJSASFactory.getAnnotations();
70     }
71 }
72
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