Workspace/Siman/src/org/splat/launcher/WindowsRegistry.java

   1 package org.splat.launcher;
   2
   3 import java.io.BufferedReader;
   4 import java.io.IOException;
   5 import java.io.InputStream;
   6 import java.io.InputStreamReader;
   7 import java.io.StringWriter;
   8
   9 public class WindowsRegistry {
  10
  11         private static final String REG_SZ = "REG_SZ";
  12
  13         static class StreamReader extends Thread { //RKV: NOPMD: TODO: Clarify the purpose of this class and then fix
  14                 private transient final InputStream _is;
  15                 private transient final StringWriter _sw = new StringWriter();;
  16
  17                 public StreamReader(final InputStream is) {
  18                         super();
  19                         this._is = is;
  20                 }
  21
  22                 @Override
  23                 public void run() {
  24                         try {
  25                                 int c = _is.read();
  26                                 while (c != -1) {
  27                                         _sw.write(c);
  28                                         c = _is.read();
  29                                 }
  30                         } catch (IOException e) {
  31                                 e.printStackTrace(); // RKV: NOPMD: TODO: try to use logger
  32                         }
  33                 }
  34
  35                 public String getResult() {
  36                         return _sw.toString();
  37                 }
  38         }
  39
  40         public static final String readValue(final String location, final String key) {
  41                 String res = null;
  42                 try {
  43                         // Run reg query, then read output with StreamReader (internal class)
  44                         String aKey;
  45                         if (key.length() == 0) {
  46                                 aKey = "/ve"; // Looking for the default key
  47                         } else {
  48                                 aKey = "/v " + key;
  49                         }
  50
  51                         Process process = Runtime.getRuntime().exec(
  52                                         "reg query " + location + " " + aKey);
  53                         BufferedReader buffer = new BufferedReader(new InputStreamReader(
  54                                         process.getInputStream()));
  55
  56                         // Output has the following format:
  57                         // \n<Version information>\n\n<key>\t<registry type>\t<value>
  58                         String output = buffer.readLine();
  59                         while (output != null) {
  60                                 if (output.contains(REG_SZ)) {
  61                                         int index = output.indexOf(REG_SZ) + REG_SZ.length() + 1;
  62                                         res = output.substring(index).trim();
  63                                         break;
  64                                 }
  65                                 output = buffer.readLine();
  66                         }
  67                         // StreamReader reader = new StreamReader(process.getInputStream());
  68
  69                         // reader.start();
  70                         // process.waitFor();
  71                         // reader.join();
  72                         // String output = reader.getResult();
  73
  74                         // Output has the following format:
  75                         // \n<Version information>\n\n<key>\t<registry type>\t<value>
  76                         // if( ! output.contains("\t") ){
  77                         // return null;
  78                         // }
  79                         // Parse out the value
  80                         // String[] parsed = output.split("\t");
  81                         // return parsed[parsed.length-1];
  82                 } catch (Exception e) {
  83                         e.printStackTrace(); // RKV: NOPMD: TODO: try to use logger
  84                 }
  85                 return res;
  86         }
  87 }