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1
19
20 package org.netbeans.upgrade.systemoptions;
21
22 import java.io.FilterOutputStream  ;
23 import java.io.IOException ;
24 import java.io.InputStream ;
25 import java.io.OutputStream ;
26 import java.util.ArrayList ;
27 import java.util.Collections ;
28 import java.util.Date ;
29 import java.util.Iterator ;
30 import java.util.List ;
31 import java.util.Properties ;
32 import org.openide.filesystems.FileLock;
33 import org.openide.filesystems.FileObject;
34 import org.openide.filesystems.FileUtil;
35 import org.openide.filesystems.Repository;
36
37
40 class PropertiesStorage {
41 private static final String USERROOT_PREFIX = "/Preferences"; private final static FileObject SFS_ROOT =
43 Repository.getDefault().getDefaultFileSystem().getRoot();
44
45 private final String folderPath;
46 private String filePath;
47
48 static PropertiesStorage instance(final String absolutePath) {
49 return new PropertiesStorage(absolutePath);
50 }
51
52 FileObject preferencesRoot() throws IOException {
53 return FileUtil.createFolder(SFS_ROOT, USERROOT_PREFIX);
54 }
55
56
57
58 private PropertiesStorage(final String absolutePath) {
59 StringBuffer sb = new StringBuffer ();
60 sb.append(USERROOT_PREFIX).append(absolutePath);
61 folderPath = sb.toString();
62 }
63
64
65 public Properties load() throws IOException {
66 try {
67 Properties retval = new Properties ();
68 InputStream is = inputStream();
69 if (is != null) {
70 try {
71 retval.load(is);
72 } finally {
73 if (is != null) is.close();
74 }
75 }
76 return retval;
77 } finally {
78 }
79 }
80
81 public void save(final Properties properties) throws IOException {
82 if (!properties.isEmpty()) {
83 OutputStream os = null;
84 try {
85 os = outputStream();
86 properties.store(os,new Date ().toString()); } finally {
88 if (os != null) os.close();
89 }
90 } else {
91 FileObject file = toPropertiesFile();
92 if (file != null) {
93 file.delete();
94 }
95 FileObject folder = toFolder();
96 while (folder != null && folder != preferencesRoot() && folder.getChildren().length == 0) {
97 folder.delete();
98 folder = folder.getParent();
99 }
100 }
101 }
102
103 private InputStream inputStream() throws IOException {
104 FileObject file = toPropertiesFile(false);
105 return (file == null) ? null : file.getInputStream();
106 }
107
108 private OutputStream outputStream() throws IOException {
109 FileObject fo = toPropertiesFile(true);
110 final FileLock lock = fo.lock();
111 final OutputStream os = fo.getOutputStream(lock);
112 return new FilterOutputStream (os) {
113 public void close() throws IOException {
114 super.close();
115 lock.releaseLock();
116 }
117 };
118 }
119
120 private String folderPath() {
121 return folderPath;
122 }
123
124 private String filePath() {
125 if (filePath == null) {
126 String [] all = folderPath().split("/"); StringBuilder sb = new StringBuilder ();
128 for (int i = 0; i < all.length-1; i++) {
129 sb.append(all[i]).append("/"); }
131 if (all.length > 0) {
132 sb.append(all[all.length-1]).append(".properties"); } else {
134 sb.append("root.properties"); }
136 filePath = sb.toString();
137 }
138 return filePath;
139 }
140
141 protected FileObject toFolder() {
142 return SFS_ROOT.getFileObject(folderPath);
143 }
144
145 protected FileObject toPropertiesFile() {
146 return SFS_ROOT.getFileObject(filePath());
147 }
148
149 protected FileObject toFolder(boolean create) throws IOException {
150 FileObject retval = toFolder();
151 if (retval == null && create) {
152 retval = FileUtil.createFolder(SFS_ROOT, folderPath);
153 }
154 assert (retval == null && !create) || (retval != null && retval.isFolder());
155 return retval;
156 }
157
158 protected FileObject toPropertiesFile(boolean create) throws IOException {
159 FileObject retval = toPropertiesFile();
160 if (retval == null && create) {
161 retval = FileUtil.createData(SFS_ROOT,filePath()); }
163 assert (retval == null && !create) || (retval != null && retval.isData());
164 return retval;
165 }
166 } |
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