util/TextDB.java

   1
   2 package org.de.metux.util;
   3
   4 import java.util.Properties;
   5 import java.util.Hashtable;
   6 import java.io.FileNotFoundException;
   7 import java.io.BufferedReader;
   8 import java.io.FileReader;
   9 import java.net.URLDecoder;
  10
  11 /*
  12     Note: URLDecoder.decode(String text) is deprecated.
  13     Instead .decode(String text, String enc) should be used.
  14     Have to think about it carefully.
  15 */
  16
  17 public class TextDB
  18 {
  19     Properties hash = new Properties();
  20
  21     public Hashtable getHashtable ()
  22     {
  23         return hash;
  24     }
  25
  26     public Hashtable Load(String filename)
  27     {
  28         Hashtable h = new Hashtable ();
  29         if (LoadIntoHashtable(filename,h))
  30             return h;
  31         else
  32             return null;
  33     }
  34
  35     public static boolean LoadIntoHashtable(String filename, Hashtable table)
  36     {
  37         BufferedReader in;
  38
  39         try
  40         {
  41             in = new BufferedReader(new FileReader(filename));
  42         }
  43         catch (FileNotFoundException e)
  44         {
  45             return false;
  46         }
  47
  48         try
  49         {
  50             String line;
  51             while ((line=in.readLine())!=null)
  52             {
  53                 int x;
  54                 int len;
  55
  56                 /* strip off comments */
  57                 if ((x=line.indexOf('#'))>=0)
  58                     line = line.substring(0,x);
  59
  60                 line = line.trim();
  61                 if ((len=line.length())>0)
  62                 {
  63                     /* -- split into key and value -- */
  64                     if ((x = line.indexOf(':'))>0)
  65                     {
  66                         String key;
  67                         String value;
  68                         String str;
  69
  70                         key = (line.substring(0,x)).trim();
  71                         value = (line.substring(x+1)).trim();
  72                         value = URLDecoder.decode(value);
  73
  74                         if (table.containsKey(key))
  75                             table.put(key,table.get(key)+"\n"+value);
  76                         else
  77                             table.put(key,value);
  78                     }
  79                     else
  80                         System.err.println ( "CORRUPT LINE "+line );
  81                 }
  82             }
  83             return true;
  84         }
  85         catch(Exception e)
  86         {
  87             System.err.println("File input error");
  88             return false;
  89         }
  90     }
  91
  92     public TextDB ( String filename ) throws FileNotFoundException
  93     {
  94         if (this.hash==null)
  95             this.hash = new Properties();
  96
  97         LoadIntoHashtable(filename,this.hash);
  98     }
  99 }