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Java > Open Source Codes > org > netbeans > modules > editor > lib2 > highlighting > HighlightingSpiPackageAccessor


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 1997-2006 Sun
17  * Microsystems, Inc. All Rights Reserved.
18  */
19
20 package org.netbeans.modules.editor.lib2.highlighting;
21
22 import java.util.Collection JavaDoc;
23 import java.util.List JavaDoc;
24 import javax.swing.text.Document JavaDoc;
25 import javax.swing.text.JTextComponent JavaDoc;
26 import org.netbeans.spi.editor.highlighting.HighlightsLayer;
27 import org.netbeans.spi.editor.highlighting.HighlightsLayerFactory;
28 import org.openide.util.TopologicalSortException;
29
30 /**
31  *
32  * @author vita
33  */
34 public abstract class HighlightingSpiPackageAccessor {
35     
36     private static HighlightingSpiPackageAccessor ACCESSOR = null;
37     
38     public static synchronized void register(HighlightingSpiPackageAccessor accessor) {
39         assert ACCESSOR == null : "Can't register two package accessors!";
40         ACCESSOR = accessor;
41     }
42     
43     public static synchronized HighlightingSpiPackageAccessor get() {
44         // Trying to wake up HighlightsLayer ...
45 try {
46             Class JavaDoc clazz = Class.forName(HighlightsLayer.class.getName());
47         } catch (ClassNotFoundException JavaDoc e) {
48             // ignore
49 }
50         
51         assert ACCESSOR != null : "There is no package accessor available!";
52         return ACCESSOR;
53     }
54     
55     /** Creates a new instance of HighlightingSpiPackageAccessor */
56     protected HighlightingSpiPackageAccessor() {
57     }
58     
59     public abstract HighlightsLayerFactory.Context createFactoryContext(Document JavaDoc document, JTextComponent JavaDoc component);
60     
61     public abstract List JavaDoc<? extends HighlightsLayer> sort(Collection JavaDoc<? extends HighlightsLayer> layers) throws TopologicalSortException;
62     
63     public abstract HighlightsLayerAccessor getHighlightsLayerAccessor(HighlightsLayer layer);
64 }
65
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