Showing the changes to java/pkg/sun/nio/ch/ChannelInputStream.java (1 of 18352 files). Show all
Unified · Split
| @@ -0,0 +1,126 @@ | |||
| 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 | } | ||