+++ /dev/null
-/* Externalizable.java -- Interface for saving and restoring object data
- Copyright (C) 1998 Free Software Foundation, Inc.
-
-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
-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 java.io;
-
-/**
- * This interface provides a way that classes can completely control how
- * the data of their object instances are written and read to and from
- * streams. It has two methods which are used to write the data to a stream
- * and to read the data from a stream. The read method must read the data
- * in exactly the way it was written by the write method.
- * <p>
- * Note that classes which implement this interface must take into account
- * that all superclass data must also be written to the stream as well.
- * The class implementing this interface must figure out how to make that
- * happen.
- * <p>
- * This interface can be used to provide object persistence. When an
- * object is to be stored externally, the <code>writeExternal</code> method is
- * called to save state. When the object is restored, an instance is
- * created using the default no-argument constructor and the
- * <code>readExternal</code> method is used to restore the state.
- *
- * @version 0.0
- *
- * @author Aaron M. Renn (arenn@urbanophile.com)
- */
-public interface Externalizable extends Serializable
-{
-
-/**
- * This method restores an object's state by reading in the instance data
- * for the object from the passed in stream. Note that this stream is not
- * a subclass of <code>InputStream</code>, but rather is a class that implements
- * the <code>ObjectInput</code> interface. That interface provides a mechanism for
- * reading in Java data types from a stream.
- * <p>
- * Note that this method must be compatible with <code>writeExternal</code>.
- * It must read back the exact same types that were written by that
- * method in the exact order they were written.
- * <p>
- * If this method needs to read back an object instance, then the class
- * for that object must be found and loaded. If that operation fails,
- * then this method throws a <code>ClassNotFoundException</code>
- *
- * @param in An <code>ObjectInput</code> instance for reading in the object state
- *
- * @exception ClassNotFoundException If the class of an object being restored cannot be found
- * @exception IOException If any other error occurs
- */
-public abstract void
-readExternal(ObjectInput in) throws ClassNotFoundException, IOException;
-
-/*************************************************************************/
-
-/**
- * This method is responsible for writing the instance data of an object
- * to the passed in stream. Note that this stream is not a subclass of
- * <code>OutputStream</code>, but rather is a class that implements the
- * <code>ObjectOutput</code> interface. That interface provides a number of methods
- * for writing Java data values to a stream.
- * <p>
- * Not that the implementation of this method must be coordinated with
- * the implementation of <code>readExternal</code>.
- *
- * @param out An <code>ObjectOutput</code> instance for writing the object state
- *
- * @exception IOException If an error occurs
- */
-public abstract void
-writeExternal(ObjectOutput out) throws IOException;
-
-} // interface Externalizable
-
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