|
1
19
20 package org.netbeans.modules.j2ee.sun.share.config;
21
22 import java.io.File  ;
23 import java.util.HashMap ;
24 import java.util.Iterator ;
25
26 import org.openide.filesystems.FileAttributeEvent;
27 import org.openide.filesystems.FileChangeListener;
28 import org.openide.filesystems.FileEvent;
29 import org.openide.filesystems.FileObject;
30 import org.openide.filesystems.FileRenameEvent;
31 import org.openide.filesystems.FileUtil;
32
33 import org.netbeans.modules.j2ee.deployment.devmodules.spi.J2eeModuleProvider;
34
35
36
42 public abstract class AbstractFilesListener {
43 protected J2eeModuleProvider provider;
44 private HashMap fileListeners = new HashMap ();
45
46 private FileChangeListener listener = new FileListener();
47
48
49 public AbstractFilesListener(J2eeModuleProvider provider) {
50 this.provider = provider;
51 startListening();
52 }
53
54 protected abstract File [] getTargetFiles();
55 protected abstract boolean isTarget(FileObject fo);
56 protected abstract boolean isTarget(String fileName);
57 protected abstract void targetCreated(FileObject fo);
58 protected abstract void targetDeleted(FileObject fo);
59 protected abstract void targetChanged(FileObject fo);
60
61 private synchronized void startListening() {
62 File [] targets = getTargetFiles();
63 for (int i=0; i<targets.length; i++) {
64 startListening(targets[i]);
65 }
66 }
67 public synchronized void stopListening() {
68 for (Iterator i = fileListeners.keySet().iterator(); i.hasNext();) {
69 FileObject fo = (FileObject) i.next();
70 removeFileListenerFrom(fo);
71 }
72 }
73 private void startListening(File target) {
74 FileObject targetFO = FileUtil.toFileObject(target);
75 while (targetFO == null) {
76 target = target.getParentFile();
77 if (target == null)
78 return;
79 targetFO = FileUtil.toFileObject(target);
80 }
81 if (!fileListeners.containsKey(targetFO)) {
82 addFileListenerTo(targetFO);
83 }
84 }
85
86 private void addFileListenerTo(FileObject fo) {
87 FileChangeListener l = FileUtil.weakFileChangeListener(listener, fo);
88 fileListeners.put(fo, l);
89 fo.addFileChangeListener(l);
90
91 }
92
93 private void removeFileListenerFrom(FileObject fo) {
94 FileChangeListener l = (FileChangeListener)fileListeners.remove(fo);
95 if (l != null) {
96 fo.removeFileChangeListener(l);
97 }
98 }
99
100 private final class FileListener implements FileChangeListener {
101
102 public void fileFolderCreated(FileEvent e) {
103 startListening();
104 }
105 public void fileDeleted(FileEvent e) {
106 FileObject fo = e.getFile();
107 if (isTarget(fo)) {
108 synchronized(fileListeners) {
109 removeFileListenerFrom(fo);
110 }
111 targetDeleted(fo);
112 }
113 startListening();
114 }
115
116 public void fileDataCreated(FileEvent e) {
117 FileObject fo = e.getFile();
118
119 if (isTarget(fo)) {
120 synchronized(fileListeners) {
121 addFileListenerTo(fo);
122 }
123 targetCreated(fo);
124 }
125 }
126 public void fileRenamed(FileRenameEvent e) {
127 FileObject fo = e.getFile();
128 if (isTarget(fo)) {
129 synchronized(fileListeners) {
130 if (!fileListeners.containsKey(fo)) {
131 addFileListenerTo(fo);
132 }
133 }
134 targetCreated(fo);
135 } else {
136 if (isTarget(e.getName() + "." + e.getExt())) {
137 synchronized(fileListeners) {
138 removeFileListenerFrom(fo);
139 }
140 targetDeleted(fo);
141 }
142 }
143 startListening();
144 }
145
146 public void fileAttributeChanged(FileAttributeEvent e) {
147 }
148
149 public void fileChanged(FileEvent e) {
150 FileObject fo = e.getFile();
151 if (isTarget(fo)) {
152 fo.refresh(true);
153 targetChanged(fo);
154 }
155 }
156 }
157 }
158 |
Popular Tags |
Java API By Example, From Geeks To Geeks.