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Diffstat (limited to 'libjava/java/io/Externalizable.java')
| -rw-r--r-- | libjava/java/io/Externalizable.java | 98 |
1 files changed, 0 insertions, 98 deletions
diff --git a/libjava/java/io/Externalizable.java b/libjava/java/io/Externalizable.java deleted file mode 100644 index 045df8660e1..00000000000 --- a/libjava/java/io/Externalizable.java +++ /dev/null @@ -1,98 +0,0 @@ -/* 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. - -As a special exception, if you link this library with other files to -produce an executable, this library does not by itself cause the -resulting executable to be covered by the GNU General Public License. -This exception does not however invalidate any other reasons why the -executable file might be covered by the GNU General Public License. */ - - -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 abstract 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 - |