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| 1 | +/* | |
| 2 | + * Copyright (c) 2000, 2005, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package java.nio.channels; | |
| 27 | + | |
| 28 | +import java.io.IOException; | |
| 29 | +import java.nio.ByteBuffer; | |
| 30 | + | |
| 31 | + | |
| 32 | +/** | |
| 33 | + * A channel that can write bytes. | |
| 34 | + * | |
| 35 | + * <p> Only one write operation upon a writable channel may be in progress at | |
| 36 | + * any given time. If one thread initiates a write operation upon a channel | |
| 37 | + * then any other thread that attempts to initiate another write operation will | |
| 38 | + * block until the first operation is complete. Whether or not other kinds of | |
| 39 | + * I/O operations may proceed concurrently with a write operation depends upon | |
| 40 | + * the type of the channel. </p> | |
| 41 | + * | |
| 42 | + * | |
| 43 | + * @author Mark Reinhold | |
| 44 | + * @author JSR-51 Expert Group | |
| 45 | + * @since 1.4 | |
| 46 | + */ | |
| 47 | + | |
| 48 | +public interface WritableByteChannel | |
| 49 | + extends Channel | |
| 50 | +{ | |
| 51 | + | |
| 52 | + /** | |
| 53 | + * Writes a sequence of bytes to this channel from the given buffer. | |
| 54 | + * | |
| 55 | + * <p> An attempt is made to write up to <i>r</i> bytes to the channel, | |
| 56 | + * where <i>r</i> is the number of bytes remaining in the buffer, that is, | |
| 57 | + * <tt>src.remaining()</tt>, at the moment this method is invoked. | |
| 58 | + * | |
| 59 | + * <p> Suppose that a byte sequence of length <i>n</i> is written, where | |
| 60 | + * <tt>0</tt> <tt><=</tt> <i>n</i> <tt><=</tt> <i>r</i>. | |
| 61 | + * This byte sequence will be transferred from the buffer starting at index | |
| 62 | + * <i>p</i>, where <i>p</i> is the buffer's position at the moment this | |
| 63 | + * method is invoked; the index of the last byte written will be | |
| 64 | + * <i>p</i> <tt>+</tt> <i>n</i> <tt>-</tt> <tt>1</tt>. | |
| 65 | + * Upon return the buffer's position will be equal to | |
| 66 | + * <i>p</i> <tt>+</tt> <i>n</i>; its limit will not have changed. | |
| 67 | + * | |
| 68 | + * <p> Unless otherwise specified, a write operation will return only after | |
| 69 | + * writing all of the <i>r</i> requested bytes. Some types of channels, | |
| 70 | + * depending upon their state, may write only some of the bytes or possibly | |
| 71 | + * none at all. A socket channel in non-blocking mode, for example, cannot | |
| 72 | + * write any more bytes than are free in the socket's output buffer. | |
| 73 | + * | |
| 74 | + * <p> This method may be invoked at any time. If another thread has | |
| 75 | + * already initiated a write operation upon this channel, however, then an | |
| 76 | + * invocation of this method will block until the first operation is | |
| 77 | + * complete. </p> | |
| 78 | + * | |
| 79 | + * @param src | |
| 80 | + * The buffer from which bytes are to be retrieved | |
| 81 | + * | |
| 82 | + * @return The number of bytes written, possibly zero | |
| 83 | + * | |
| 84 | + * @throws NonWritableChannelException | |
| 85 | + * If this channel was not opened for writing | |
| 86 | + * | |
| 87 | + * @throws ClosedChannelException | |
| 88 | + * If this channel is closed | |
| 89 | + * | |
| 90 | + * @throws AsynchronousCloseException | |
| 91 | + * If another thread closes this channel | |
| 92 | + * while the write operation is in progress | |
| 93 | + * | |
| 94 | + * @throws ClosedByInterruptException | |
| 95 | + * If another thread interrupts the current thread | |
| 96 | + * while the write operation is in progress, thereby | |
| 97 | + * closing the channel and setting the current thread's | |
| 98 | + * interrupt status | |
| 99 | + * | |
| 100 | + * @throws IOException | |
| 101 | + * If some other I/O error occurs | |
| 102 | + */ | |
| 103 | + public int write(ByteBuffer src) throws IOException; | |
| 104 | + | |
| 105 | +} | |