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    1   /*
    2    $Id: GroovyStarter.java,v 1.4 2005/08/29 10:49:42 blackdrag Exp $
    3
    4    Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
    5
    6    Redistribution and use of this software and associated documentation
    7    ("Software"), with or without modification, are permitted provided
    8    that the following conditions are met:
    9
    10   1. Redistributions of source code must retain copyright
    11      statements and notices.  Redistributions must also contain a
    12      copy of this document.
    13
    14   2. Redistributions in binary form must reproduce the
    15      above copyright notice, this list of conditions and the
    16      following disclaimer in the documentation and/or other
    17      materials provided with the distribution.
    18
    19   3. The name "groovy" must not be used to endorse or promote
    20      products derived from this Software without prior written
    21      permission of The Codehaus.  For written permission,
    22      please contact info@codehaus.org.
    23
    24   4. Products derived from this Software may not be called "groovy"
    25      nor may "groovy" appear in their names without prior written
    26      permission of The Codehaus. "groovy" is a registered
    27      trademark of The Codehaus.
    28
    29   5. Due credit should be given to The Codehaus -
    30      http://groovy.codehaus.org/
    31
    32   THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
    33   ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
    34   NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
    35   FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
    36   THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
    37   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
    38   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
    39   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    40   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
    41   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    42   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
    43   OF THE POSSIBILITY OF SUCH DAMAGE.
    44
    45   */
    46  package org.codehaus.groovy.tools;
    47
    48  import java.lang.reflect .*;
    49  import java.io.FileInputStream;
    50
    51
    52
    53  /***
    54   * Helper class to help classworlds to load classes.
    55   */
    56  public class GroovyStarter {
    57
    58      static void printUsage() {
    59          System.out.println("possible programs are 'groovyc','groovy','console','grok' and 'groovysh'");
    60          System.exit(1);
    61      }
    62
    63
    64      public static void rootLoader(String args[]) {
    65          String conf = System.getProperty("groovy.launcher.conf",null);
    66          LoaderConfiguration lc = new LoaderConfiguration();
    67
    68          // evaluate parameters
    69          boolean hadMain=false, hadConf=false, hadCP=false;
    70          int argsOffset = 0;
    71          while (args.length-argsOffset>0 && !(hadMain && hadConf && hadCP)) {
    72              if (args[argsOffset].equals("--classpath")) {
    73                  if (hadCP) break;
    74                  if (args.length==argsOffset+1) {
    75                      exit("classpath parameter needs argument");
    76                  }
    77                  lc.addClassPath(args[argsOffset+1]);
    78                  argsOffset+=2;
    79              } else if (args[argsOffset].equals("--main")) {
    80                  if (hadMain) break;
    81                  if (args.length==argsOffset+1) {
    82                      exit("main parameter needs argument");
    83                  }
    84                  lc.setMainClass(args[argsOffset+1]);
    85                  argsOffset+=2;
    86              } else if (args[argsOffset].equals("--conf")) {
    87                  if (hadConf) break;
    88                  if (args.length==argsOffset+1) {
    89                      exit("conf parameter needs argument");
    90                  }
    91                  conf=args[argsOffset+1];
    92                  argsOffset+=2;
    93              } else {
    94                  break;
    95              }
    96          }
    97
    98          // we need to know the class we want to start
    99          if (lc.getMainClass()==null && conf==null) {
    100             exit("no configuration file or main class specified");
    101         }
    102
    103         // copy arguments for main class
    104         String[] newArgs = new String[args.length-argsOffset];
    105         for (int i=0; i<newArgs.length; i++) {
    106             newArgs[i] = args[i+argsOffset];
    107         }
    108         // load configuration file
    109         if (conf!=null) {
    110             try {
    111                 lc.configure(new FileInputStream(conf));
    112             } catch (Exception e) {
    113                 System.err.println("exception while configuring main class loader:");
    114                 exit(e);
    115             }
    116         }
    117         // create loader and execute main class
    118         ClassLoader loader = new RootLoader(lc);
    119         Method m=null;
    120         try {
    121             Class c = loader.loadClass(lc.getMainClass());
    122             m = c.getMethod("main", new Class[]{String[].class});
    123         } catch (ClassNotFoundException e1) {
    124             exit(e1);
    125         } catch (SecurityException e2) {
    126             exit(e2);
    127         } catch (NoSuchMethodException e2) {
    128             exit(e2);
    129         }
    130         try {
    131             m.invoke(null, new Object[]{newArgs});
    132         } catch (IllegalArgumentException e3) {
    133             exit(e3);
    134         } catch (IllegalAccessException e3) {
    135             exit(e3);
    136         } catch (InvocationTargetException e3) {
    137             exit(e3);
    138         }
    139     }
    140
    141     private static void exit(Exception e) {
    142         e.printStackTrace();
    143         System.exit(1);
    144     }
    145
    146     private static void exit(String msg) {
    147         System.err.println(msg);
    148         System.exit(1);
    149     }
    150
    151     // after migration from classworlds to the rootloader rename
    152     // the rootLoader method to main and remove this method as
    153     // well as the classworlds method
    154    /* public static void main(String args[],ClassWorld classWorld ) {
    155         classworlds(args,classWorld);
    156     }*/
    157
    158     public static void main(String args[]) {
    159         try {
    160             rootLoader(args);
    161         } catch (Throwable t) {
    162             t.printStackTrace();
    163         }
    164     }
    165
    166     /*public static void classworlds(String oldArgs[],ClassWorld classWorld ) {
    167         try {
    168             // Creates a realm with *just* the system classloader
    169             ClassRealm system = classWorld.newRealm("system");
    170
    171             // Get the groovy realm
    172             ClassRealm groovy = classWorld.getRealm("groovy");
    173
    174             // import everything from the system realm, because imports
    175             // are searched *first* in Classworlds
    176             groovy.importFrom("system", "");
    177
    178             //add tools.jar to classpath
    179             String tools = System.getProperty("tools.jar");
    180             if (tools!=null) {
    181             	URL ref = (new File(tools)).toURI().toURL();
    182             	groovy.addConstituent(ref);
    183             }
    184
    185             if (oldArgs.length==0) {
    186                 printUsage();
    187                 System.exit(1);
    188             }
    189
    190             String program = oldArgs[0].toLowerCase();
    191             String[] args = new String[oldArgs.length-1];
    192             for (int i=0; i<args.length; i++) {
    193                 args[i] = oldArgs[i+1];
    194             }
    195
    196             if (program.equals("groovyc")) {
    197                 org.codehaus.groovy.tools.FileSystemCompiler.main(args);
    198             } else if (program.equals("groovy")) {
    199                 GroovyMain.main(args);
    200             } else if (program.equals("console")) {
    201                 // work around needed, because the console is compiled after this files
    202                 Class c = Class.forName("groovy.ui.Console");
    203                 Method m= c.getMethod("main", new Class[]{String[].class});
    204                 m.invoke(null, new Object[]{args});
    205             } else if (program.equals("groovysh")) {
    206                 InteractiveShell.main(args);
    207              } else if (program.equals("grok")) {
    208                 org.codehaus.groovy.tools.Grok.main(args);
    209             } else {
    210                 System.out.println("unknown program "+program);
    211                 printUsage();
    212                 System.exit(1);
    213             }
    214
    215         } catch (Exception e) {
    216             e.printStackTrace();
    217             System.exit(1);
    218         }
    219
    220     }*/
    221
    222 }