tim/prune/ExternalTools.java

   1 package tim.prune;
   2
   3 import java.io.IOException;
   4
   5 import tim.prune.config.Config;
   6
   7
   8 /**
   9  * Class to manage interfaces to external tools, like exiftool
  10  */
  11 public abstract class ExternalTools
  12 {
  13         /** Constant for Exiftool */
  14         public static final int TOOL_EXIFTOOL = 0;
  15         /** Constant for Gpsbabel */
  16         public static final int TOOL_GPSBABEL = 1;
  17         /** Constant for Gnuplot */
  18         public static final int TOOL_GNUPLOT  = 2;
  19         /** Config keys in order that the tools are defined above */
  20         private static final String[] CONFIG_KEYS = {Config.KEY_EXIFTOOL_PATH, Config.KEY_GPSBABEL_PATH, Config.KEY_GNUPLOT_PATH};
  21         /** Verification flags for the tools in the order defined above */
  22         private static final String[] VERIFY_FLAGS = {"-v", "-V", "-V"};
  23
  24
  25         /**
  26          * Check if the selected tool is installed
  27          * @param inToolNum number of tool, from constants
  28          * @return true if selected tool is installed
  29          */
  30         public static boolean isToolInstalled(int inToolNum)
  31         {
  32                 switch (inToolNum) {
  33                         case TOOL_EXIFTOOL:
  34                         case TOOL_GPSBABEL:
  35                         case TOOL_GNUPLOT:
  36                                 String toolPath = Config.getConfigString(CONFIG_KEYS[inToolNum]);
  37                                 if (toolPath != null && toolPath.length() > 0) {
  38                                         return check(toolPath + " " + VERIFY_FLAGS[inToolNum]);
  39                                 }
  40                 }
  41                 // Not found
  42                 return false;
  43         }
  44
  45         /**
  46          * Check if the selected tool is installed using the given path
  47          * @param inToolNum number of tool, from constants
  48          * @param inPath selected path to use instead of configured one
  49          * @return true if selected tool is installed
  50          */
  51         public static boolean isToolInstalled(int inToolNum, String inPath)
  52         {
  53                 if (inPath == null || inPath.equals("")) {return false;}
  54                 switch (inToolNum) {
  55                         case TOOL_EXIFTOOL:
  56                         case TOOL_GPSBABEL:
  57                         case TOOL_GNUPLOT:
  58                                 return check(inPath + " " + VERIFY_FLAGS[inToolNum]);
  59                 }
  60                 // Not found
  61                 return false;
  62         }
  63
  64         /**
  65          * Attempt to call the specified command
  66          * @return true if found, false otherwise
  67          */
  68         private static boolean check(String inCommand)
  69         {
  70                 try
  71                 {
  72                         Runtime.getRuntime().exec(inCommand);
  73                         return true;
  74                 }
  75                 catch (IOException ioe)
  76                 {
  77                         // exception thrown, command not found
  78                         return false;
  79                 }
  80         }
  81 }