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1 package com.tonbeller.tbutils.res;
2
3 import java.io.File  ;
4 import java.io.FileInputStream ;
5 import java.io.FileOutputStream ;
6 import java.io.IOException ;
7 import java.io.InputStream ;
8 import java.io.OutputStream ;
9 import java.util.Collection ;
10 import java.util.Properties ;
11
12 import org.apache.log4j.Logger;
13
14
20 class FilePersistentResourceProvider implements PersistentResourceProvider {
21 Properties props;
22 File file;
23
24 private static Logger logger = Logger.getLogger(FilePersistentResourceProvider.class);
25
26 public FilePersistentResourceProvider(File file) {
27 this.file = file;
28 load();
29 }
30
31 private void load() {
32 props = new Properties ();
33 InputStream is = null;
34 try {
35 if (!file.exists())
36 return;
37 is = new FileInputStream (file);
38 props.load(is);
39 } catch (IOException e) {
40 logger.error(null, e);
41 } finally {
42 if (is != null) {
43 try {
44 is.close();
45 } catch (IOException e) {
46 logger.error(null, e);
47 }
48 }
49 }
50 }
51
52 private void store() {
53 OutputStream os = null;
54 try {
55 os = new FileOutputStream (file);
56 props.store(os, "## TONBELLER");
57 } catch (IOException e) {
58 logger.error(null, e);
59 } finally {
60 if (os != null) {
61 try {
62 os.close();
63 } catch (IOException e1) {
64 logger.error(null, e1);
65 }
66 }
67 }
68
69 }
70
71 public String getString(String key) {
72 return props.getProperty(key);
73 }
74
75 public void store(String key, String value) {
76 props.setProperty(key, value);
77 }
78
79 public void remove(String key) {
80 props.remove(key);
81 }
82
83 public Collection keySet() {
84 return props.keySet();
85 }
86
87 public void flush() {
88 store();
89 }
90
91 public void close() {
92 store();
93 }
94
95 public void dump(Dumper d) {
96 d.dump(this);
97 }
98
99 public String getName() {
100 return "FileResouceProvider " + file;
101 }
102 } |
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