tim/prune/ExternalTools.java

   1 package tim.prune;
   2
   3 import java.io.IOException;
   4
   5
   6 /**
   7  * Class to manage interfaces to external tools, like exiftool
   8  */
   9 public abstract class ExternalTools
  10 {
  11         /** Constant for Exiftool */
  12         public static final int TOOL_EXIFTOOL = 0;
  13         /** Constant for Gpsbabel */
  14         public static final int TOOL_GPSBABEL = 1;
  15         /** Constant for Gnuplot */
  16         public static final int TOOL_GNUPLOT  = 2;
  17         /** Config keys in order that the tools are defined above */
  18         private static final String[] CONFIG_KEYS = {Config.KEY_EXIFTOOL_PATH, Config.KEY_GPSBABEL_PATH, Config.KEY_GNUPLOT_PATH};
  19         /** Verification flags for the tools in the order defined above */
  20         private static final String[] VERIFY_FLAGS = {"-v", "-V", "-V"};
  21
  22
  23         /**
  24          * Check if the selected tool is installed
  25          * @param inToolNum number of tool, from constants
  26          * @return true if selected tool is installed
  27          */
  28         public static boolean isToolInstalled(int inToolNum)
  29         {
  30                 switch (inToolNum) {
  31                         case TOOL_EXIFTOOL:
  32                         case TOOL_GPSBABEL:
  33                         case TOOL_GNUPLOT:
  34                                 String toolPath = Config.getConfigString(CONFIG_KEYS[inToolNum]);
  35                                 if (toolPath != null && toolPath.length() > 0) {
  36                                         return check(toolPath + " " + VERIFY_FLAGS[inToolNum]);
  37                                 }
  38                 }
  39                 // Not found
  40                 return false;
  41         }
  42
  43         /**
  44          * Check if the selected tool is installed using the given path
  45          * @param inToolNum number of tool, from constants
  46          * @param inPath selected path to use instead of configured one
  47          * @return true if selected tool is installed
  48          */
  49         public static boolean isToolInstalled(int inToolNum, String inPath)
  50         {
  51                 if (inPath == null || inPath.equals("")) {return false;}
  52                 switch (inToolNum) {
  53                         case TOOL_EXIFTOOL:
  54                         case TOOL_GPSBABEL:
  55                         case TOOL_GNUPLOT:
  56                                 return check(inPath + " " + VERIFY_FLAGS[inToolNum]);
  57                 }
  58                 // Not found
  59                 return false;
  60         }
  61
  62         /**
  63          * Attempt to call the specified command
  64          * @return true if found, false otherwise
  65          */
  66         private static boolean check(String inCommand)
  67         {
  68                 // System.out.println("Checking tool '" + inCommand + "'");
  69                 try
  70                 {
  71                         Runtime.getRuntime().exec(inCommand);
  72                         return true;
  73                 }
  74                 catch (IOException ioe)
  75                 {
  76                         // exception thrown, command not found
  77                         return false;
  78                 }
  79         }
  80 }