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1
21
22 package org.armedbear.j.mail;
23
24 import java.io.BufferedInputStream  ;
25 import java.io.InvalidClassException ;
26 import java.io.IOException ;
27 import java.io.ObjectInputStream ;
28 import java.io.ObjectOutputStream ;
29 import java.io.Serializable ;
30 import java.util.ArrayList ;
31 import java.util.List ;
32 import org.armedbear.j.File;
33 import org.armedbear.j.Log;
34 import org.armedbear.j.Utilities;
35
36 public final class MboxSummary implements Serializable
37 {
38 private final ArrayList entries;
39 private final String path;
40 private long lastModified;
41 private long length;
42
43 public MboxSummary(File mailboxFile, List entries)
44 {
45 this.entries = new ArrayList (entries);
46 path = mailboxFile.canonicalPath();
47 lastModified = mailboxFile.lastModified();
48 length = mailboxFile.length();
49 }
50
51 public synchronized ArrayList getEntries()
52 {
53 return entries;
54 }
55
56 public synchronized long length()
57 {
58 return length;
59 }
60
61 public synchronized long lastModified()
62 {
63 return lastModified;
64 }
65
66 public synchronized void write(File file)
67 {
68 try {
69 Log.debug("MboxSummary.write");
70 long start = System.currentTimeMillis();
71 File temp = Utilities.getTempFile();
72 ObjectOutputStream objectOut = new ObjectOutputStream (temp.getOutputStream());
73 objectOut.writeObject(this);
74 objectOut.flush();
75 objectOut.close();
76 Utilities.deleteRename(temp, file);
77 long elapsed = System.currentTimeMillis() - start;
78 Log.debug("MboxSummary.write completed " + elapsed + " ms");
79 }
80 catch (Exception e) {
81 Log.error(e);
82 }
83 }
84
85 public static MboxSummary read(File file)
86 {
87 Log.debug("MboxSummary.read");
88 if (file == null || !file.isFile())
89 return null;
90 ObjectInputStream in = null;
91 try {
92 in = new ObjectInputStream (new BufferedInputStream (file.getInputStream()));
93 MboxSummary summary = (MboxSummary) in.readObject();
94 File mailboxFile = File.getInstance(summary.path);
95 if (mailboxFile != null && mailboxFile.isFile()) {
96 if (summary.length == mailboxFile.length())
97 if (summary.lastModified == mailboxFile.lastModified())
98 return summary;
99 }
100 }
101 catch (InvalidClassException e) {
102 Log.debug(e);
105 }
106 catch (Exception e) {
107 Log.error(e);
108 }
109 finally {
110 if (in != null) {
111 try {
112 in.close();
113 }
114 catch (IOException e) {
115 Log.error(e);
116 }
117 }
118 }
119 return null;
120 }
121 }
122 |
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