org.argeo.osgi.boot/src/org/argeo/osgi/boot/Launcher.java

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.osgi.boot;
  17
  18 import java.io.FileInputStream;
  19 import java.io.IOException;
  20 import java.lang.reflect.Method;
  21 import java.util.List;
  22 import java.util.Vector;
  23
  24 import org.eclipse.core.runtime.adaptor.EclipseStarter;
  25 import org.osgi.framework.BundleContext;
  26
  27 /** Command line interface. */
  28 @SuppressWarnings({ "rawtypes", "unchecked", "restriction" })
  29 public class Launcher {
  30
  31         public static void main(String[] args) {
  32                 // Try to load system properties
  33                 String systemPropertiesFilePath = OsgiBootUtils
  34                                 .getProperty(OsgiBoot.PROP_ARGEO_OSGI_BOOT_SYSTEM_PROPERTIES_FILE);
  35                 if (systemPropertiesFilePath != null) {
  36                         FileInputStream in;
  37                         try {
  38                                 in = new FileInputStream(systemPropertiesFilePath);
  39                                 System.getProperties().load(in);
  40                         } catch (IOException e1) {
  41                                 throw new RuntimeException(
  42                                                 "Cannot load system properties from "
  43                                                                 + systemPropertiesFilePath, e1);
  44                         }
  45                         if (in != null) {
  46                                 try {
  47                                         in.close();
  48                                 } catch (Exception e) {
  49                                         // silent
  50                                 }
  51                         }
  52                 }
  53
  54                 // Start main class
  55                 startMainClass();
  56
  57                 // Start Equinox
  58                 BundleContext bundleContext = null;
  59                 try {
  60                         bundleContext = EclipseStarter.startup(args, null);
  61                 } catch (Exception e) {
  62                         throw new RuntimeException("Cannot start Equinox.", e);
  63                 }
  64
  65                 // OSGi bootstrap
  66                 OsgiBoot osgiBoot = new OsgiBoot(bundleContext);
  67                 osgiBoot.bootstrap();
  68         }
  69
  70         protected static void startMainClass() {
  71                 String className = OsgiBootUtils
  72                                 .getProperty(OsgiBoot.PROP_ARGEO_OSGI_BOOT_APPCLASS);
  73                 if (className == null)
  74                         return;
  75
  76                 String line = System.getProperty(OsgiBoot.PROP_ARGEO_OSGI_BOOT_APPARGS,
  77                                 "");
  78
  79                 String[] uiArgs = readArgumentsFromLine(line);
  80
  81                 try {
  82                         // Launch main method using reflection
  83                         Class clss = Class.forName(className);
  84                         Class[] mainArgsClasses = new Class[] { uiArgs.getClass() };
  85                         Object[] mainArgs = { uiArgs };
  86                         Method mainMethod = clss.getMethod("main", mainArgsClasses);
  87                         mainMethod.invoke(null, mainArgs);
  88                 } catch (Exception e) {
  89                         throw new RuntimeException("Cannot start main class.", e);
  90                 }
  91
  92         }
  93
  94         /**
  95          * Transform a line into an array of arguments, taking "" as single
  96          * arguments. (nested \" are not supported)
  97          */
  98         private static String[] readArgumentsFromLine(String lineOrig) {
  99                 String line = lineOrig.trim();// remove trailing spaces
 100                 List args = new Vector();
 101                 StringBuffer curr = new StringBuffer("");
 102                 boolean inQuote = false;
 103                 char[] arr = line.toCharArray();
 104                 for (int i = 0; i < arr.length; i++) {
 105                         char c = arr[i];
 106                         switch (c) {
 107                         case '\"':
 108                                 inQuote = !inQuote;
 109                                 break;
 110                         case ' ':
 111                                 if (!inQuote) {// otherwise, no break: goes to default
 112                                         if (curr.length() > 0) {
 113                                                 args.add(curr.toString());
 114                                                 curr = new StringBuffer("");
 115                                         }
 116                                         break;
 117                                 }
 118                         default:
 119                                 curr.append(c);
 120                                 break;
 121                         }
 122                 }
 123
 124                 // Add last arg
 125                 if (curr.length() > 0) {
 126                         args.add(curr.toString());
 127                         curr = null;
 128                 }
 129
 130                 String[] res = new String[args.size()];
 131                 for (int i = 0; i < args.size(); i++) {
 132                         res[i] = args.get(i).toString();
 133                 }
 134                 return res;
 135         }
 136
 137 }