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Java > Open Source Codes > org > netbeans > modules > java > debug > TreeNavigatorJavaSourceFactory


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 package org.netbeans.modules.java.debug;
20
21 import java.util.Collections JavaDoc;
22 import java.util.List JavaDoc;
23 import org.netbeans.api.java.source.CancellableTask;
24 import org.netbeans.api.java.source.CompilationInfo;
25 import org.netbeans.api.java.source.JavaSource;
26 import org.netbeans.api.java.source.JavaSource.Phase;
27 import org.netbeans.api.java.source.JavaSource.Priority;
28 import org.netbeans.api.java.source.support.LookupBasedJavaSourceTaskFactory;
29 import org.openide.filesystems.FileObject;
30 import org.openide.util.Lookup;
31
32 /**
33  *
34  * @author Jan Lahoda
35  */
36 public final class TreeNavigatorJavaSourceFactory extends LookupBasedJavaSourceTaskFactory {
37     
38     private CancellableTask<CompilationInfo> task;
39     
40     static TreeNavigatorJavaSourceFactory getInstance() {
41         return Lookup.getDefault().lookup(TreeNavigatorJavaSourceFactory.class);
42     }
43     
44     public TreeNavigatorJavaSourceFactory() {
45         super(Phase.UP_TO_DATE, Priority.NORMAL);
46     }
47
48     public synchronized CancellableTask<CompilationInfo> createTask(FileObject file) {
49         //XXX: should not be necessary to do the wrapper task, but for some reason it is necessary:
50 return new WrapperTask(task);
51     }
52
53     public List JavaDoc<FileObject> getFileObjects() {
54         List JavaDoc<FileObject> result = super.getFileObjects();
55
56         if (result.size() == 1)
57             return result;
58
59         return Collections.emptyList();
60     }
61
62     public FileObject getFile() {
63         List JavaDoc<FileObject> result = super.getFileObjects();
64         
65         if (result.size() == 1)
66             return result.get(0);
67         
68         return null;
69     }
70
71     public synchronized void setLookup(Lookup l, CancellableTask<CompilationInfo> task) {
72         this.task = task;
73         super.setLookup(l);
74     }
75
76     static class WrapperTask implements CancellableTask<CompilationInfo> {
77         
78         private CancellableTask<CompilationInfo> delegate;
79         
80         public WrapperTask(CancellableTask<CompilationInfo> delegate) {
81             this.delegate = delegate;
82         }
83
84         public void cancel() {
85             delegate.cancel();
86         }
87
88         public void run(CompilationInfo parameter) throws Exception JavaDoc {
89             delegate.run(parameter);
90         }
91         
92     }
93 }
94
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