TextFile


1   package hudson.util;
2   
3   import java.io.BufferedReader  ;
4   import java.io.File  ;
5   import java.io.FileInputStream  ;
6   import java.io.IOException  ;
7   import java.io.InputStreamReader  ;
8   import java.io.PrintWriter  ;
9   import java.io.StringWriter  ;
10  
11  /**
12   * Represents a text file.
13   *
14   * Provides convenience methods for reading and writing to it.
15   *
16   * @author Kohsuke Kawaguchi
17   */
18  public class TextFile {
19      private final File   file;
20  
21      public TextFile(File   file) {
22          this.file = file;
23      }
24  
25      public boolean exists() {
26          return file.exists();
27      }
28  
29      /**
30       * Reads the entire contents and returns it.
31       */
32      public String   read() throws IOException   {
33          StringWriter   out = new StringWriter  ();
34          PrintWriter   w = new PrintWriter  (out);
35          BufferedReader   in = new BufferedReader  (new InputStreamReader  (new FileInputStream  (file),"UTF-8"));
36          try {
37              String   line;
38              while((line=in.readLine())!=null)
39                  w.println(line);
40          } finally{
41              in.close();
42          }
43          return out.toString();
44      }
45  
46      /**
47       * Overwrites the file by the given string.
48       */
49      public void write(String   text) throws IOException   {
50          AtomicFileWriter w = new AtomicFileWriter(file);
51          w.write(text);
52          w.commit();
53      }
54  
55      public String   readTrim() throws IOException   {
56          return read().trim();
57      }
58  
59      public String   toString() {
60          return file.toString();
61      }
62  }
63
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