[RFA/JDWP] Exceptions

[Keith Seitz <keiths at redhat dot com>]

Hi,

Okay, this is another mean-spirited patch. It contains a bunch of
exception types used by the JDWP back-end. Sadly, it does not contain
all of them -- JDWP defines new errors for every little thing. The rest
will be added as we go along.

Unlike the last mega-patch I sent, I have put the most important class
at the top of the patch (JdwpException), which is a base class for all
the other files in the patch (which simply differ by constructor).

I am in the process of rewriting and testing the one last class in
gnu.classpath.jdwp.id, so expect to see that one soon, too.

Problems/comments/concerns?
Keith

ChangeLog
2005-06-16  Keith Seitz  <keiths@redhat.com>

        * gnu/classpath/jdwp/exception/VmDeadException.java: New file.
        * gnu/classpath/jdwp/exception/NotImplementedException.java: New file.
        * gnu/classpath/jdwp/exception/JdwpInternalErrorException.java: New
        file.
        * gnu/classpath/jdwp/exception/JdwpException.java: New file.
        * gnu/classpath/jdwp/exception/InvalidThreadGroupException.java: New
        file.
        * gnu/classpath/jdwp/exception/InvalidThreadException.java: New file.
        * gnu/classpath/jdwp/exception/InvalidStringException.java: New file
        * gnu/classpath/jdwp/exception/InvalidObjectException.java: New file.
        * gnu/classpath/jdwp/exception/InvalidEventTypeException.java: New
        file.
        * gnu/classpath/jdwp/exception/InvalidCountException.java: New file.
        * gnu/classpath/jdwp/exception/InvalidClassException.java: New file.

Index: gnu/classpath/jdwp/exception/JdwpException.java
--- /dev/null
+++ gnu/classpath/jdwp/exception/JdwpException.java
@@ -0,0 +1,86 @@
+/* JdwpException.java -- an exception base class for all JDWP exceptions
+   Copyright (C) 2005 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.classpath.jdwp.exception;
+
+/**
+ * A base class exception for all JDWP back-end exceptions
+ *
+ * @author Keith Seitz  (keiths@redhat.com)
+ */
+public class JdwpException
+  extends Exception
+{
+  // The integer error code defined by JDWP
+  private short _errorCode;
+
+  /**
+   * Constructs a new <code>JdwpException</code> with the
+   * given error code and given cause
+   *
+   * @param code  the JDWP error code
+   * @param t     the cause of the exception
+   */
+  public JdwpException (short code, Throwable t)
+  {
+    super (t);
+    _errorCode = code;
+  }
+
+  /**
+   * Constructs a new <code>JdwpException</code> with the
+   * given error code and string error message
+   *
+   * @param code  the JDWP error code
+   * @param str   an error message
+   */
+  public JdwpException (short code, String str)
+  {
+    super (str);
+    _errorCode = code;
+  }
+
+  /**
+   * Returns the JDWP error code represented by this exception
+   */
+  public short getErrorCode ()
+  {
+    return _errorCode;
+  }
+}
Index: gnu/classpath/jdwp/exception/InvalidClassException.java
--- /dev/null
+++ gnu/classpath/jdwp/exception/InvalidClassException.java
@@ -0,0 +1,63 @@
+/* InvalidClassException.java -- invalid/unknown class reference id exception
+   Copyright (C) 2005 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.classpath.jdwp.exception;
+
+import gnu.classpath.jdwp.JdwpConstants;
+
+/**
+ * An exception thrown by the JDWP back-end when an invalid reference
+ * type id is used by the debugger.
+ *
+ * @author Keith Seitz  (keiths@redhat.com)
+ */
+public class InvalidClassException
+  extends JdwpException
+{
+  public InvalidClassException (long id)
+  {
+    super (JdwpConstants.Error.INVALID_CLASS,
+	   "invalid class id (" + id + ")");
+  }
+
+  public InvalidClassException (Throwable t)
+  {
+    super (JdwpConstants.Error.INVALID_CLASS, t);
+  }
+}
Index: gnu/classpath/jdwp/exception/InvalidCountException.java
--- /dev/null
+++ gnu/classpath/jdwp/exception/InvalidCountException.java
@@ -0,0 +1,61 @@
+/* InvalidCountException -- an invalid count exception
+   Copyright (C) 2005 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.classpath.jdwp.exception;
+
+import gnu.classpath.jdwp.JdwpConstants;
+
+/**
+ * An exception thrown when a count filter is given an invalid count.
+ *
+ * @author Keith Seitz  (keiths@redhat.com)
+ */
+public class InvalidCountException
+  extends JdwpException
+{
+  public InvalidCountException (int id)
+  {
+    super (JdwpConstants.Error.INVALID_COUNT, "invalid count (" + id + ")");
+  }
+
+  public InvalidCountException (Throwable t)
+  {
+    super (JdwpConstants.Error.INVALID_COUNT, t);
+  }
+}
Index: gnu/classpath/jdwp/exception/InvalidEventTypeException.java
--- /dev/null
+++ gnu/classpath/jdwp/exception/InvalidEventTypeException.java
@@ -0,0 +1,63 @@
+/* InvalidEventTypeException.java -- an invalid event kind exception
+   Copyright (C) 2005 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.classpath.jdwp.exception;
+
+import gnu.classpath.jdwp.JdwpConstants;
+
+/**
+ * An exception thrown when the debugger asks for an event request
+ * for a non-existant event
+ *
+ * @author Keith Seitz  (keiths@redhat.com)
+ */
+public class InvalidEventTypeException
+  extends JdwpException
+{
+  public InvalidEventTypeException (byte kind)
+  {
+    super (JdwpConstants.Error.INVALID_EVENT_TYPE,
+	   "invalid event type (" + kind + ")");
+  }
+
+  public InvalidEventTypeException (Throwable t)
+  {
+    super (JdwpConstants.Error.INVALID_EVENT_TYPE, t);
+  }
+}
Index: gnu/classpath/jdwp/exception/InvalidObjectException.java
--- /dev/null
+++ gnu/classpath/jdwp/exception/InvalidObjectException.java
@@ -0,0 +1,63 @@
+/* InvalidObjectException.java -- an invalid object id exception
+   Copyright (C) 2005 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.classpath.jdwp.exception;
+
+import gnu.classpath.jdwp.JdwpConstants;
+
+/**
+ * An exception thrown when an invalid object id is used by
+ * the debugger
+ *
+ * @author Keith Seitz  (keiths@redhat.com)
+ */
+public class InvalidObjectException
+  extends JdwpException
+{
+  public InvalidObjectException (long id)
+  {
+    super (JdwpConstants.Error.INVALID_OBJECT,
+	   "invalid object id (" + id + ")");
+  }
+
+  public InvalidObjectException (Throwable t)
+  {
+    super (JdwpConstants.Error.INVALID_OBJECT, t);
+  }
+}
Index: gnu/classpath/jdwp/exception/InvalidStringException.java
--- /dev/null
+++ gnu/classpath/jdwp/exception/InvalidStringException.java
@@ -0,0 +1,62 @@
+/* InvalidStringException.java -- an invalid string exception
+   Copyright (C) 2005 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.classpath.jdwp.exception;
+
+import gnu.classpath.jdwp.JdwpConstants;
+
+/**
+ * An exception thrown when the debugger uses an invalid String.
+ *
+ * @author Keith Seitz  (keiths@redhat.com)
+ */
+public class InvalidStringException
+  extends JdwpException
+{
+  public InvalidStringException (String str)
+  {
+    super (JdwpConstants.Error.INVALID_STRING,
+	   "invalid string (" + str + ")");
+  }
+
+  public InvalidStringException (Throwable t)
+  {
+    super (JdwpConstants.Error.INVALID_STRING, t);
+  }
+}
Index: gnu/classpath/jdwp/exception/InvalidThreadException.java
--- /dev/null
+++ gnu/classpath/jdwp/exception/InvalidThreadException.java
@@ -0,0 +1,63 @@
+/* InvalidThreadException.java -- an invalid thread exception
+   Copyright (C) 2005 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.classpath.jdwp.exception;
+
+import gnu.classpath.jdwp.JdwpConstants;
+
+/**
+ * An exception thrown when an invalid thread is used
+ * by the debugger
+ *
+ * @author Keith Seitz  (keiths@redhat.com)
+ */
+public class InvalidThreadException
+  extends JdwpException
+{
+  public InvalidThreadException (long id)
+  {
+    super (JdwpConstants.Error.INVALID_THREAD,
+	   "invalid thread id (" + id + ")");
+  }
+
+  public InvalidThreadException (Throwable t)
+  {
+    super (JdwpConstants.Error.INVALID_THREAD, t);
+  }
+}
Index: gnu/classpath/jdwp/exception/InvalidThreadGroupException.java
--- /dev/null
+++ gnu/classpath/jdwp/exception/InvalidThreadGroupException.java
@@ -0,0 +1,63 @@
+/* InvalidThreadGroupException.java -- an invalid thread group exception
+   Copyright (C) 2005 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.classpath.jdwp.exception;
+
+import gnu.classpath.jdwp.JdwpConstants;
+
+/**
+ * An exception thrown when an invalid thread group is used
+ * by the debugger
+ *
+ * @author Keith Seitz  (keiths@redhat.com)
+ */
+public class InvalidThreadGroupException
+  extends JdwpException
+{
+  public InvalidThreadException (long id)
+  {
+    super (JdwpConstants.Error.INVALID_THREAD_GROUP,
+	   "invalid thread id (" + id + ")");
+  }
+
+  public InvalidThreadException (Throwable t)
+  {
+    super (JdwpConstants.Error.INVALID_THREAD, t);
+  }
+}
Index: gnu/classpath/jdwp/exception/JdwpInternalErrorException.java
--- /dev/null
+++ gnu/classpath/jdwp/exception/JdwpInternalErrorException.java
@@ -0,0 +1,57 @@
+/* JdwpInternalErrorException.java -- an internal error exception
+   Copyright (C) 2005 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.classpath.jdwp.exception;
+
+import gnu.classpath.jdwp.JdwpConstants;
+
+/**
+ * An exception thrown by the JDWP back-end when an unusual runtime
+ * error occurs internally
+ *
+ * @author Keith Seitz  (keiths@redhat.com)
+ */
+public class JdwpInternalErrorException
+  extends JdwpException
+{
+  public JdwpInternalErrorException (Throwable cause)
+  {
+    super (JdwpConstants.Error.INTERNAL, cause);
+  }
+}
Index: gnu/classpath/jdwp/exception/NotImplementedException.java
--- /dev/null
+++ gnu/classpath/jdwp/exception/NotImplementedException.java
@@ -0,0 +1,58 @@
+/* NotImplementedException.java -- an exception for unimplemented JDWP
+   Copyright (C) 2005 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.classpath.jdwp.exception;
+
+import gnu.classpath.jdwp.JdwpConstants;
+
+/**
+ * An exception thrown by virtual machines when functionality
+ * or features are not implemented
+ *
+ * @author Keith Seitz  (keiths@redhat.com)
+ */
+public class NotImplementedException
+  extends JdwpException
+{
+  public NotImplementedException (String feature)
+  {
+    super (JdwpConstants.Error.NOT_IMPLEMENTED,
+	   feature + " is not yet implemented");
+  }
+}
Index: gnu/classpath/jdwp/exception/VmDeadException.java
--- /dev/null
+++ gnu/classpath/jdwp/exception/VmDeadException.java
@@ -0,0 +1,55 @@
+/* VmDeadException.java -- dead virtual machine exception
+   Copyright (C) 2005 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.classpath.jdwp.exception;
+
+import gnu.classpath.jdwp.JdwpConstants;
+
+/**
+ * An exception thrown when the virtual machine is dead
+ *
+ * @author Keith Seitz  (keiths@redhat.com)
+ */
+public class VmDeadException
+  extends JdwpException
+{
+  public VmDeadException ()
+  {
+    super (JdwpConstants.Error.VM_DEAD, "Virtual machine is dead");
+  }
+}