Source for gnu.classpath.jdwp.transport.TransportFactory

   1: /* TransportFactory.java -- Factory for transports
   2:    Copyright (C) 2005 Free Software Foundation
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: terms of your choice, provided that you also meet, for each linked
  32: independent module, the terms and conditions of the license of that
  33: module.  An independent module is a module which is not derived from
  34: or based on this library.  If you modify this library, you may extend
  35: this exception to your version of the library, but you are not
  36: obligated to do so.  If you do not wish to do so, delete this
  37: exception statement from your version. */
  38: 
  39: 
  40: package gnu.classpath.jdwp.transport;
  41: 
  42: import java.util.HashMap;
  43: 
  44: /**
  45:  * A factory class that constructs transports for use by
  46:  * the JDWP back-end.
  47:  *
  48:  * @author Keith Seitz  <keiths@redhat.com>
  49:  */
  50: public class TransportFactory
  51: {
  52:   // Keyword in configspec that specifies transport method
  53:   private static final String _TRANSPORT_PROPERTY = "transport";
  54: 
  55:   // A single transport method mapping
  56:   private static class TransportMethod
  57:   {
  58:     String name;
  59:     Class clazz;
  60:     public TransportMethod (String name, Class clazz)
  61:     {
  62:       this.name = name;
  63:       this.clazz = clazz;
  64:     }
  65:   }
  66: 
  67:   // List of all supported transport methods
  68:   private static TransportMethod[] _transportMethods = new TransportMethod[]
  69:   {
  70:     new TransportMethod (SocketTransport.NAME, SocketTransport.class)
  71:     //new TransportMethod (ShmemTransport.NAME, ShmemTransport.class)
  72:   };
  73: 
  74:   /**
  75:    * Get a transport configured as specified in the properties
  76:    *
  77:    * @param   properties  a <code>HashMap</code> specifying the JDWP
  78:    *                      configuration properties
  79:    * @returns             the created and configured transport
  80:    * @throws  TransportException for invalid configurations
  81:    */
  82:   public static ITransport newInstance (HashMap properties)
  83:     throws TransportException
  84:   {
  85:     String name = null;
  86:     if (properties != null)
  87:       name = (String) properties.get (_TRANSPORT_PROPERTY);
  88:     if (name == null)
  89:       throw new TransportException ("no transport specified");
  90: 
  91:     for (int i = 0; i < _transportMethods.length; ++i)
  92:       {
  93:         if (_transportMethods[i].name.equals (name))
  94:           {
  95:             try
  96:               {
  97:                 ITransport t;
  98:                 t = (ITransport) _transportMethods[i].clazz.newInstance ();
  99:                 t.configure (properties);
 100:                 return t;
 101:               }
 102:             catch (TransportException te)
 103:               {
 104:                 throw te;
 105:               }
 106:             catch (Exception e)
 107:               {
 108:                 throw new TransportException (e);
 109:               }
 110:           }
 111:       }
 112: 
 113:     throw new TransportException ("transport \"" + name + "\" not found");
 114:   }
 115: }