Showing the changes to java/pkg/sun/nio/ch/ChannelInputStream.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 2001, 2002, 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 sun.nio.ch; | |
| 27 | + | |
| 28 | +import java.io.*; | |
| 29 | +import java.nio.*; | |
| 30 | +import java.nio.channels.*; | |
| 31 | +import java.nio.channels.spi.*; | |
| 32 | + | |
| 33 | + | |
| 34 | +/** | |
| 35 | + * This class is defined here rather than in java.nio.channels.Channels | |
| 36 | + * so that code can be shared with SocketAdaptor. | |
| 37 | + * | |
| 38 | + * @author Mike McCloskey | |
| 39 | + * @author Mark Reinhold | |
| 40 | + * @since 1.4 | |
| 41 | + */ | |
| 42 | + | |
| 43 | +public class ChannelInputStream | |
| 44 | + extends InputStream | |
| 45 | +{ | |
| 46 | + | |
| 47 | + public static int read(ReadableByteChannel ch, ByteBuffer bb, | |
| 48 | + boolean block) | |
| 49 | + throws IOException | |
| 50 | + { | |
| 51 | + if (ch instanceof SelectableChannel) { | |
| 52 | + SelectableChannel sc = (SelectableChannel)ch; | |
| 53 | + synchronized (sc.blockingLock()) { | |
| 54 | + boolean bm = sc.isBlocking(); | |
| 55 | + if (!bm) | |
| 56 | + throw new IllegalBlockingModeException(); | |
| 57 | + if (bm != block) | |
| 58 | + sc.configureBlocking(block); | |
| 59 | + int n = ch.read(bb); | |
| 60 | + if (bm != block) | |
| 61 | + sc.configureBlocking(bm); | |
| 62 | + return n; | |
| 63 | + } | |
| 64 | + } else { | |
| 65 | + return ch.read(bb); | |
| 66 | + } | |
| 67 | + } | |
| 68 | + | |
| 69 | + protected final ReadableByteChannel ch; | |
| 70 | + private ByteBuffer bb = null; | |
| 71 | + private byte[] bs = null; // Invoker's previous array | |
| 72 | + private byte[] b1 = null; | |
| 73 | + | |
| 74 | + public ChannelInputStream(ReadableByteChannel ch) { | |
| 75 | + this.ch = ch; | |
| 76 | + } | |
| 77 | + | |
| 78 | + public synchronized int read() throws IOException { | |
| 79 | + if (b1 == null) | |
| 80 | + b1 = new byte[1]; | |
| 81 | + int n = this.read(b1); | |
| 82 | + if (n == 1) | |
| 83 | + return b1[0] & 0xff; | |
| 84 | + return -1; | |
| 85 | + } | |
| 86 | + | |
| 87 | + public synchronized int read(byte[] bs, int off, int len) | |
| 88 | + throws IOException | |
| 89 | + { | |
| 90 | + if ((off < 0) || (off > bs.length) || (len < 0) || | |
| 91 | + ((off + len) > bs.length) || ((off + len) < 0)) { | |
| 92 | + throw new IndexOutOfBoundsException(); | |
| 93 | + } else if (len == 0) | |
| 94 | + return 0; | |
| 95 | + | |
| 96 | + ByteBuffer bb = ((this.bs == bs) | |
| 97 | + ? this.bb | |
| 98 | + : ByteBuffer.wrap(bs)); | |
| 99 | + bb.limit(Math.min(off + len, bb.capacity())); | |
| 100 | + bb.position(off); | |
| 101 | + this.bb = bb; | |
| 102 | + this.bs = bs; | |
| 103 | + return read(bb); | |
| 104 | + } | |
| 105 | + | |
| 106 | + protected int read(ByteBuffer bb) | |
| 107 | + throws IOException | |
| 108 | + { | |
| 109 | + return ChannelInputStream.read(ch, bb, true); | |
| 110 | + } | |
| 111 | + | |
| 112 | + public int available() throws IOException { | |
| 113 | + // special case where the channel is to a file | |
| 114 | + if (ch instanceof SeekableByteChannel) { | |
| 115 | + SeekableByteChannel sbc = (SeekableByteChannel)ch; | |
| 116 | + long rem = Math.max(0, sbc.size() - sbc.position()); | |
| 117 | + return (rem > Integer.MAX_VALUE) ? Integer.MAX_VALUE : (int)rem; | |
| 118 | + } | |
| 119 | + return 0; | |
| 120 | + } | |
| 121 | + | |
| 122 | + public void close() throws IOException { | |
| 123 | + ch.close(); | |
| 124 | + } | |
| 125 | + | |
| 126 | +} | |