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jeremybenn |
/* Cloneable.java -- Interface for marking objects cloneable by Object.clone()
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Copyright (C) 1998, 1999, 2001, 2002, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.lang;
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/**
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* This interface should be implemented by classes wishing to
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* support of override <code>Object.clone()</code>. The default
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* behaviour of <code>clone()</code> performs a shallow copy, but
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* subclasses often change this to perform a deep copy. Therefore,
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* it is a good idea to document how deep your clone will go.
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* If <code>clone()</code> is called on an object which does not
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* implement this interface, a <code>CloneNotSupportedException</code>
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* will be thrown.
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*
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* <p>This interface is simply a tagging interface; it carries no
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* requirements on methods to implement. However, it is typical for
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* a Cloneable class to implement at least <code>equals</code>,
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* <code>hashCode</code>, and <code>clone</code>, sometimes
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* increasing the accessibility of clone to be public. The typical
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* implementation of <code>clone</code> invokes <code>super.clone()</code>
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* rather than a constructor, but this is not a requirement.
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*
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* <p>If an object that implement Cloneable should not be cloned,
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* simply override the <code>clone</code> method to throw a
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* <code>CloneNotSupportedException</code>.
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*
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* <p>All array types implement Cloneable, and have a public
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* <code>clone</code> method that will never fail with a
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* <code>CloneNotSupportedException</code>.
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*
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* @author Paul Fisher
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* @author Eric Blake (ebb9@email.byu.edu)
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* @author Warren Levy (warrenl@cygnus.com)
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* @see Object#clone()
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* @see CloneNotSupportedException
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* @since 1.0
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* @status updated to 1.4
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*/
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public interface Cloneable
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{
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// Tagging interface only.
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}
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