Source for gnu.classpath.jdwp.id.ReferenceTypeId

   1: /* ReferenceTypeId.java -- a base class for all reference type IDs
   2:    Copyright (C) 2005, 2006 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.id;
  41: 
  42: import gnu.classpath.jdwp.exception.InvalidClassException;
  43: 
  44: import java.io.DataOutputStream;
  45: import java.io.IOException;
  46: 
  47: /**
  48:  * Base class for reference type IDs. This class usurps
  49:  * <code>JdwpId</code>'s tag member for its own use (type tag).
  50:  *
  51:  * @author Keith Seitz  <keiths@redhat.com>
  52:  */
  53: public class ReferenceTypeId
  54:   extends JdwpId
  55: {
  56:   /**
  57:    * Constructor used by {Array,Interface,Class}ReferenceTypeId
  58:    */
  59:   public ReferenceTypeId (byte tag)
  60:   {
  61:     super (tag);
  62:   }
  63: 
  64:   /**
  65:    * Gets the class associated with this ID
  66:    *
  67:    * @returns the class
  68:    * @throws InvalidClassException if the class is not valid
  69:    */
  70:   public Class getType ()
  71:     throws InvalidClassException
  72:   {
  73:     Class clazz = (Class) _reference.get ();
  74:     if (clazz == null)
  75:       throw new InvalidClassException (_id);
  76: 
  77:     return clazz;
  78:   }
  79: 
  80:   /**
  81:    * Outputs the reference type ID to the given output stream
  82:    *
  83:    * @param  outStream    the stream to which to write the data
  84:    * @throws IOException  for errors writing to the stream
  85:    */
  86:   public void write (DataOutputStream outStream)
  87:     throws IOException
  88:   {
  89:     outStream.writeLong (_id);
  90:   }
  91: }