runtime/org.argeo.slc.osgiboot/src/main/java/org/argeo/slc/osgiboot/Launcher.java

   1 package org.argeo.slc.osgiboot;
   2
   3 import java.lang.reflect.Method;
   4 import java.util.List;
   5 import java.util.Properties;
   6 import java.util.Vector;
   7
   8 import org.eclipse.core.runtime.adaptor.EclipseStarter;
   9 import org.osgi.framework.BundleContext;
  10
  11 public class Launcher {
  12
  13         public static void main(String[] args) {
  14                 startMainClass();
  15
  16                 BundleContext bundleContext = null;
  17                 try {
  18                         bundleContext = EclipseStarter.startup(args, null);
  19                 } catch (Exception e) {
  20                         throw new RuntimeException("Cannot start Equinox.", e);
  21                 }
  22
  23                 OsgiBoot osgiBoot = new OsgiBoot(bundleContext);
  24                 osgiBoot.bootstrap();
  25         }
  26
  27         protected static void startMainClass() {
  28                 Properties config = System.getProperties();
  29                 String className = config.getProperty("slc.osgiboot.appclass");
  30                 if (className == null)
  31                         return;
  32
  33                 String[] uiArgs = readArgumentsFromLine(config.getProperty(
  34                                 "slc.osgiboot.appargs", ""));
  35                 try {
  36                         // Launch main method using reflection
  37                         Class clss = Class.forName(className);
  38                         Class[] mainArgsClasses = new Class[] { uiArgs.getClass() };
  39                         Object[] mainArgs = { uiArgs };
  40                         Method mainMethod = clss.getMethod("main", mainArgsClasses);
  41                         mainMethod.invoke(null, mainArgs);
  42                 } catch (Exception e) {
  43                         throw new RuntimeException("Cannot start main class.", e);
  44                 }
  45
  46         }
  47
  48         /**
  49          * Transform a line into an array of arguments, taking "" as single
  50          * arguments. (nested \" are not supported)
  51          */
  52         private static String[] readArgumentsFromLine(String lineOrig) {
  53
  54                 String line = lineOrig.trim();// remove trailing spaces
  55                 // System.out.println("line=" + line);
  56                 List args = new Vector();
  57                 StringBuffer curr = new StringBuffer("");
  58                 boolean inQuote = false;
  59                 char[] arr = line.toCharArray();
  60                 for (int i = 0; i < arr.length; i++) {
  61                         char c = arr[i];
  62                         switch (c) {
  63                         case '\"':
  64                                 inQuote = !inQuote;
  65                                 break;
  66                         case ' ':
  67                                 if (!inQuote) {// otherwise, no break: goes to default
  68                                         if (curr.length() > 0) {
  69                                                 args.add(curr.toString());
  70                                                 curr = new StringBuffer("");
  71                                         }
  72                                         break;
  73                                 }
  74                         default:
  75                                 curr.append(c);
  76                                 break;
  77                         }
  78                 }
  79
  80                 // Add last arg
  81                 if (curr.length() > 0) {
  82                         args.add(curr.toString());
  83                         curr = null;
  84                 }
  85
  86                 String[] res = new String[args.size()];
  87                 for (int i = 0; i < args.size(); i++) {
  88                         res[i] = args.get(i).toString();
  89                         // System.out.println("res[i]=" + res[i]);
  90                 }
  91                 return res;
  92         }
  93
  94 }