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Java > Open Source Codes > org > netbeans > core > startup > layers > NonCacheManager


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.core.startup.layers;
21
22 import java.beans.PropertyVetoException JavaDoc;
23 import java.io.IOException JavaDoc;
24 import java.net.URL JavaDoc;
25 import java.util.List JavaDoc;
26 import org.openide.filesystems.FileSystem;
27 import org.openide.filesystems.XMLFileSystem;
28
29 /**
30  * Fake cache manager that does not in fact cache anything.
31  * Just uses an in-memory XMLFileSystem.
32  * @author Jesse Glick
33  */
34 final class NonCacheManager extends LayerCacheManager {
35
36     public NonCacheManager() {
37         super(null);
38     }
39
40     public boolean cacheExists() {
41         return false;
42     }
43     
44     public void cleanupCache() throws IOException JavaDoc {
45         // do nothing
46 }
47     
48     public boolean supportsLoad() {
49         return true;
50     }
51     
52     public FileSystem createEmptyFileSystem() throws IOException JavaDoc {
53         return new XMLFileSystem();
54     }
55     
56     public void load(FileSystem fs) throws IOException JavaDoc {
57         throw new IllegalStateException JavaDoc();
58     }
59     
60     public void store(FileSystem fs, List JavaDoc<URL JavaDoc> urls) throws IOException JavaDoc {
61         try {
62             ((XMLFileSystem)fs).setXmlUrls(urls.toArray(new URL JavaDoc[urls.size()]));
63         } catch (PropertyVetoException JavaDoc pve) {
64             throw (IOException JavaDoc) new IOException JavaDoc(pve.toString()).initCause(pve);
65         }
66     }
67     
68 }
69
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