src/tim/prune/load/FileCacher.java

   1 package tim.prune.load;
   2
   3 import java.io.BufferedReader;
   4 import java.io.File;
   5 import java.io.FileReader;
   6 import java.io.IOException;
   7 import java.util.ArrayList;
   8
   9 /**
  10  * Class to load the contents of a file
  11  * into an array for later retrieval
  12  */
  13 public class FileCacher extends ContentCacher
  14 {
  15         /**
  16          * Constructor
  17          * @param inFile File object to cache
  18          */
  19         public FileCacher(File inFile)
  20         {
  21                 loadFile(inFile);
  22         }
  23
  24
  25         /**
  26          * Load the specified file into memory
  27          */
  28         private void loadFile(File inFile)
  29         {
  30                 ArrayList<String> contentList = new ArrayList<String>();
  31                 if (inFile != null && inFile.exists() && inFile.canRead())
  32                 {
  33                         BufferedReader reader = null;
  34                         try
  35                         {
  36                                 reader = new BufferedReader(new FileReader(inFile));
  37                                 String currLine = reader.readLine();
  38                                 if (currLine != null && currLine.startsWith("<?xml")) {
  39                                         return; // it's an xml file, it shouldn't use this cacher
  40                                 }
  41                                 while (currLine != null)
  42                                 {
  43                                         if (currLine.indexOf('\0') >= 0)
  44                                         {
  45                                                 reader.close();
  46                                                 return; // it's a binary file, shouldn't use this cacher
  47                                         }
  48                                         if (currLine.trim().length() > 0)
  49                                                 contentList.add(currLine);
  50                                         currLine = reader.readLine();
  51                                 }
  52                         }
  53                         catch (IOException ioe) {}
  54                         finally
  55                         {
  56                                 // close file ignoring errors
  57                                 try
  58                                 {
  59                                         if (reader != null) reader.close();
  60                                 }
  61                                 catch (Exception e) {}
  62                         }
  63                 }
  64                 setContents(contentList);
  65         }
  66 }