/* * Copyright (c) 2003, 2006, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.nio; import java.nio.ByteBuffer;import java.io.IOException; /** This is an interface to adapt existing APIs to use {@link java.nio.ByteBuffer *  <tt>ByteBuffers</tt>} as the underlying *  data format.  Only the initial producer and final consumer have to be changed.<p> * *  For example, the Zip/Jar code supports {@link java.io.InputStream <tt>InputStreams</tt>}. *  To make the Zip code use {@link java.nio.MappedByteBuffer <tt>MappedByteBuffers</tt>} as *  the underlying data structure, it can create a class of InputStream that wraps the ByteBuffer, *  and implements the ByteBuffered interface. A co-operating class several layers *  away can ask the InputStream if it is an instance of ByteBuffered, then *  call the {@link #getByteBuffer()} method. */public interface ByteBuffered {      /**     * Returns the <tt>ByteBuffer</tt> behind this object, if this particular     * instance has one. An implementation of <tt>getByteBuffer()</tt> is allowed     * to return <tt>null</tt> for any reason.     *     * @return  The <tt>ByteBuffer</tt>, if this particular instance has one,     *          or <tt>null</tt> otherwise.     *     * @throws  IOException     *          If the ByteBuffer is no longer valid.     *     * @since  1.5     */    public ByteBuffer getByteBuffer() throws IOException;}