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Java > Open Source Codes > org > netbeans > core > registry > InstanceBinding


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.registry;
21
22 import org.netbeans.core.registry.oldformats.InstanceUtils;
23 import org.netbeans.spi.registry.BasicContext;
24 import org.openide.filesystems.FileObject;
25
26 import java.io.IOException JavaDoc;
27
28
29 /**
30  * Provides ObjectBinding.Reader for ObjectBinding implementation.
31  * (copy & pasted & refactored from original org.netbeans.core.registry.ObjectBinding)
32  */
33 final class InstanceBinding {
34     private static final String JavaDoc INSTANCE_EXTENSION = "instance";//NOI18N
35 static final ObjectBinding.Reader READER = new ObjectBinding.Reader() {
36         boolean canRead(FileObject fo) {
37             return fo.getExt().equalsIgnoreCase(INSTANCE_EXTENSION);
38         }
39
40         String JavaDoc getFileExtension() {
41             return INSTANCE_EXTENSION;
42         }
43
44         ObjectBinding getObjectBinding(BasicContext ctx, FileObject fo) {
45             return new ObjectBindingImpl(fo);
46         }
47     };
48
49     private InstanceBinding() {
50     }
51
52     private static class ObjectBindingImpl extends ObjectBinding {
53         protected ObjectBindingImpl(FileObject fo) {
54             super(fo);
55         }
56
57         public Object JavaDoc createInstance() throws IOException JavaDoc {
58             try {
59                 return read(getFile());
60             } catch (ClassNotFoundException JavaDoc e) {
61                 throw new IOException JavaDoc(e.getLocalizedMessage());
62             } catch (UnsupportedOperationException JavaDoc e) {
63                 throw new IOException JavaDoc(e.getLocalizedMessage());
64             }
65         }
66
67         public boolean isEnabled() {
68             return (getFile() != null && getFile().isValid());
69         }
70     }
71
72     private static Object JavaDoc read(FileObject fo)
73             throws ClassNotFoundException JavaDoc, UnsupportedOperationException JavaDoc {
74         Object JavaDoc o = fo.getAttribute("instanceCreate");
75         if (o != null) {
76             return o;
77         }
78
79         o = fo.getAttribute("instanceClass");
80         if (o != null) {
81             if (o instanceof String JavaDoc) {
82                 return InstanceUtils.newValue((String JavaDoc) o);
83             } else {
84                 return o;
85             }
86         }
87
88         String JavaDoc s = fo.getName();
89         if (s.indexOf('[') >= 0) {
90             s = s.substring(s.indexOf('[')+1, s.indexOf(']'));
91         }
92         s = s.replace('-', '.');
93         return InstanceUtils.newValue(s);
94     }
95
96 }
97
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