1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183

/**
 *  BlueCove - Java library for Bluetooth
 *  Copyright (C) 2006-2009 Vlad Skarzhevskyy
 * 
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 *
 *  @author vlads
 *  @version $Id$
 */
package net.sf.bluecove.obex;

import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.LineNumberReader;
import java.io.Reader;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Properties;

public class Persistence {

	private static final String configFileName = "obex-install.cfg";

	private static final String devicePrefix = "device:";

	private static final String selectedPrefix = "selected:";

	private static final Properties properties = new Properties();

	private static File homePath() {
		String path = ".bluecove";
		boolean isWindows = false;
		String sysName = System.getProperty("os.name");
		if (sysName != null) {
			sysName = sysName.toLowerCase();
			if (sysName.indexOf("windows") != -1) {
				isWindows = true;
				path = "Application Data";
			}
		}
		File dir;
		try {
			dir = new File(System.getProperty("user.home"), path);
			if (!dir.exists()) {
				if (!dir.mkdirs()) {
					throw new SecurityException();
				}
			}
		} catch (SecurityException e) {
			dir = new File(new File(System.getProperty("java.io.tmpdir"), System.getProperty("user.name")), path);
		}
		if (isWindows) {
			dir = new File(dir, "BlueCove");
		}
		if (!dir.exists()) {
			if (!dir.mkdirs()) {
				return null;
			}
		} else if (!dir.isDirectory()) {
			dir.delete();
			if (!dir.mkdirs()) {
				return null;
			}
		}
		return dir;
	}

	private static File getConfigFile() {
		File home = homePath();
		if (home == null) {
			return null;
		}
		return new File(home, configFileName);
	}

	public static String loadDevices(Hashtable devices) {
		File cf = getConfigFile();
		if (cf == null || !cf.exists()) {
			return null;
		}
		Reader fr = null;
		LineNumberReader lnr = null;
		try {
			lnr = new LineNumberReader(fr = new FileReader(cf));
			devices.clear();
			String line = lnr.readLine();
			String selected = null;
			while (line != null) {
				if (line.startsWith(devicePrefix)) {
					DeviceInfo di = new DeviceInfo();
					di.loadFromLine(line.substring(devicePrefix.length()));
					if (di.isValid()) {
						devices.put(di.btAddress.toLowerCase(), di);
					}
				} else if (line.startsWith(selectedPrefix)) {
					selected = line.substring(selectedPrefix.length());
				} else {
					int p = line.indexOf('=');
					if (p != -1) {
						properties.put(line.substring(0, p), line.substring(p + 1));
					}
				}
				line = lnr.readLine();
			}
			return selected;
		} catch (Throwable e) {
			Logger.debug(e);
			return null;
		} finally {
			if (lnr != null) {
				try {
					lnr.close();
				} catch (IOException e) {
				}
			}
			if (fr != null) {
				try {
					fr.close();
				} catch (IOException e) {
				}
			}
		}
	}

	public static void storeDevices(Hashtable devices, String selected) {
		File cf = getConfigFile();
		if (cf == null) {
			return;
		}
		FileWriter fw = null;
		try {
			fw = new FileWriter(cf, false);
			for (Enumeration i = devices.keys(); i.hasMoreElements();) {
				String addr = (String) i.nextElement();
				DeviceInfo di = (DeviceInfo) devices.get(addr);
				fw.write(devicePrefix + di.saveAsLine() + "\n");
			}
			if (selected != null) {
				fw.write(selectedPrefix + selected + "\n");
			}
			for (Enumeration en = properties.propertyNames(); en.hasMoreElements();) {
				String name = (String) en.nextElement();
				fw.write(name + "=" + properties.getProperty(name) + "\n");
			}
			fw.flush();
		} catch (Throwable e) {
			Logger.debug(e);
			return;
		} finally {
			if (fw != null) {
				try {
					fw.close();
				} catch (IOException e) {
				}
			}
		}
	}

	public static String getProperty(String key, String defaultValue) {
		return properties.getProperty(key, defaultValue);
	}

	public static void setProperty(String key, String value) {
		properties.setProperty(key, value);
	}
}