util/TextTable.java

   1
   2 package org.de.metux.util;
   3
   4 import java.util.Hashtable;
   5 import java.util.Properties;
   6 import java.io.*;
   7 import java.util.Enumeration;
   8
   9 public class TextTable
  10 {
  11     public static Hashtable Load(String filename,String pkey)
  12     {
  13         Hashtable h = new Hashtable ();
  14         if (LoadIntoHashtable(filename,h, pkey))
  15             return h;
  16         else
  17             return null;
  18     }
  19
  20     public static boolean LoadIntoHashtable(String filename, Hashtable table, String pkey)
  21     {
  22         BufferedReader in;
  23
  24         try
  25         {
  26             in = new BufferedReader(new FileReader(filename));
  27         }
  28         catch (FileNotFoundException e)
  29         {
  30             return false;
  31         }
  32
  33         try
  34         {
  35             String line;
  36             Hashtable record = new Properties();
  37             int linecnt = 0;
  38
  39             while ((line=in.readLine())!=null)
  40             {
  41                 int x;
  42                 int len;
  43
  44                 /* strip off comments */
  45                 if ((x=line.indexOf('#'))>=0)
  46                     line = line.substring(0,x);
  47
  48                 line = line.trim();
  49                 if ((len=line.length())>0)
  50                 {
  51                     /* -- split into key and value -- */
  52                     if ((x = line.indexOf(':'))>0)
  53                     {
  54                         String key;
  55                         String value;
  56                         String str;
  57
  58                         key = (line.substring(0,x)).trim();
  59                         value = (line.substring(x+1)).trim();
  60
  61                         if (record.containsKey(key))
  62                             record.put(key,record.get(key)+"\n"+value);
  63                         else
  64                             record.put(key,value);
  65                     }
  66                     else if ((line.indexOf("--")==0)&&(!record.isEmpty()))
  67                     {
  68                         String k = (String)record.get(pkey);
  69                         if (k.length()>0)
  70                             table.put(k,record);
  71                         else
  72                             table.put(record,record);
  73
  74                         record = new Hashtable();
  75                     }
  76                     else
  77                         System.err.println(
  78                             "CORRUPT LINE ("+
  79                             filename+":"+linecnt+"): "+line);
  80                 }
  81                 linecnt++;
  82             }
  83             return true;
  84         }
  85         catch(IOException e)
  86         {
  87             System.err.println("File input error");
  88             return false;
  89         }
  90     }
  91
  92     public static String DumpTable ( Hashtable table )
  93     {
  94         if (table==null)
  95             return "<NULL>";
  96
  97         String res = "";
  98         for (Enumeration e = table.keys(); e.hasMoreElements(); )
  99         {
 100             String key = (String)e.nextElement();
 101             res += "#PKEY: "+key+"\n";
 102             Hashtable record = (Hashtable)table.get(key);
 103             for (Enumeration re = record.keys(); re.hasMoreElements(); )
 104             {
 105                 String rk = (String)re.nextElement();
 106                 res += rk+": "+record.get(rk)+"\n";
 107             }
 108             res += "-- \n";
 109         }
 110         return res;
 111     }
 112 }