source: trunk/CrossPare/src/de/ugoe/cs/cpdp/decentApp/FileWatcher.java @ 34

Last change on this file since 34 was 32, checked in by ftrautsch, 10 years ago

integrating decent into crosspare

  • Property svn:mime-type set to text/plain
File size: 745 bytes
Line 
1package de.ugoe.cs.cpdp.decentApp;
2
3import java.util.*;
4import java.io.*;
5
6/**
7 * Helper class for watching if a file was changed
8 *
9 * @author Philip Makedonski
10 *
11 */
12public abstract class FileWatcher extends TimerTask {
13        // Last timestamp
14        private long timeStamp;
15       
16        // File to watch
17        private File file;
18
19        /**
20         * Constructor
21         * @param file
22         */
23        public FileWatcher(File file) {
24                this.file = file;
25                this.timeStamp = file.lastModified();
26        }
27
28        /**
29         * Watches a file and executes the onChange Method
30         * if a file is changed
31         */
32        public final void run() {
33                long timeStamp = file.lastModified();
34
35                if (this.timeStamp != timeStamp) {
36                        this.timeStamp = timeStamp;
37                        onChange(file);
38                }
39        }
40
41        protected abstract void onChange(File file);
42}
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