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Java > Open Source Codes > org > netbeans > modules > java > source > JavaSourceTaskFactoryManager


1 /*
2  * The contents of this file are subject to the terms of the Common Development
3  * and Distribution License (the License). You may not use this file except in
4  * compliance with the License.
5  *
6  * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
7  * or http://www.netbeans.org/cddl.txt.
8  *
9  * When distributing Covered Code, include this CDDL Header Notice in each file
10  * and include the License file at http://www.netbeans.org/cddl.txt.
11  * If applicable, add the following below the CDDL Header, with the fields
12  * enclosed by brackets [] replaced by your own identifying information:
13  * "Portions Copyrighted [year] [name of copyright owner]"
14  *
15  * The Original Software is NetBeans. The Initial Developer of the Original
16  * Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun
17  * Microsystems, Inc. All Rights Reserved.
18  */
19 package org.netbeans.modules.java.source;
20
21 import org.netbeans.api.java.source.JavaSourceTaskFactory;
22 import org.openide.util.Lookup;
23 import org.openide.util.LookupEvent;
24 import org.openide.util.LookupListener;
25 import org.openide.util.RequestProcessor;
26
27 /**
28  *
29  * @author Jan Lahoda
30  */
31 public final class JavaSourceTaskFactoryManager {
32     
33     private static JavaSourceTaskFactoryManager INSTANCE;
34     
35     public static synchronized void register() {
36         INSTANCE = new JavaSourceTaskFactoryManager();
37     }
38     
39     private Lookup.Result<JavaSourceTaskFactory> factories;
40     
41     /** Creates a new instance of JavaSourceTaskFactoryManager */
42     private JavaSourceTaskFactoryManager() {
43         final RequestProcessor.Task updateTask = new RequestProcessor("JavaSourceTaskFactoryManager Worker", 1).create(new Runnable JavaDoc() {
44             public void run() {
45                 update();
46             }
47         });
48         
49         factories = Lookup.getDefault().lookupResult(JavaSourceTaskFactory.class);
50         factories.addLookupListener(new LookupListener() {
51             public void resultChanged(LookupEvent ev) {
52                 updateTask.schedule(0);
53             }
54         });
55         
56         update();
57     }
58     
59     private void update() {
60         for (JavaSourceTaskFactory f : factories.allInstances()) {
61             ACCESSOR.fireChangeEvent(f);
62         }
63     }
64     
65     public static interface Accessor {
66         public abstract void fireChangeEvent(JavaSourceTaskFactory f);
67     }
68     
69     public static Accessor ACCESSOR;
70     
71 }
72
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