Showing the changes to java/pkg/sun/rmi/transport/proxy/HttpSendInputStream.java (1 of 18352 files). Show all
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| 1 | /* | ||
| 2 | * Copyright (c) 1996, 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 | package sun.rmi.transport.proxy; | ||
| 26 | |||
| 27 | import java.io.*; | ||
| 28 | |||
| 29 | /** | ||
| 30 | * The HttpSendInputStream class is used by the HttpSendSocket class as | ||
| 31 | * a layer on the top of the InputStream it returns so that it can be | ||
| 32 | * notified of attempts to read from it. This allows the HttpSendSocket | ||
| 33 | * to know when it should push across its output message. | ||
| 34 | */ | ||
| 35 | class HttpSendInputStream extends FilterInputStream { | ||
| 36 | |||
| 37 | /** the HttpSendSocket object that is providing this stream */ | ||
| 38 | HttpSendSocket owner; | ||
| 39 | |||
| 40 | /** | ||
| 41 | * Create new filter on a given input stream. | ||
| 42 | * @param in the InputStream to filter from | ||
| 43 | * @param owner the HttpSendSocket that is providing this stream | ||
| 44 | */ | ||
| 45 | public HttpSendInputStream(InputStream in, HttpSendSocket owner) | ||
| 46 | throws IOException | ||
| 47 | { | ||
| 48 | super(in); | ||
| 49 | |||
| 50 | this.owner = owner; | ||
| 51 | } | ||
| 52 | |||
| 53 | /** | ||
| 54 | * Mark this stream as inactive for its owner socket, so the next time | ||
| 55 | * a read is attempted, the owner will be notified and a new underlying | ||
| 56 | * input stream obtained. | ||
| 57 | */ | ||
| 58 | public void deactivate() | ||
| 59 | { | ||
| 60 | in = null; | ||
| 61 | } | ||
| 62 | |||
| 63 | /** | ||
| 64 | * Read a byte of data from the stream. | ||
| 65 | */ | ||
| 66 | public int read() throws IOException | ||
| 67 | { | ||
| 68 | if (in == null) | ||
| 69 | in = owner.readNotify(); | ||
| 70 | return in.read(); | ||
| 71 | } | ||
| 72 | |||
| 73 | /** | ||
| 74 | * Read into an array of bytes. | ||
| 75 | * @param b the buffer into which the data is to be read | ||
| 76 | * @param off the start offset of the data | ||
| 77 | * @param len the maximum number of bytes to read | ||
| 78 | */ | ||
| 79 | public int read(byte b[], int off, int len) throws IOException | ||
| 80 | { | ||
| 81 | if (len == 0) | ||
| 82 | return 0; | ||
| 83 | if (in == null) | ||
| 84 | in = owner.readNotify(); | ||
| 85 | return in.read(b, off, len); | ||
| 86 | } | ||
| 87 | |||
| 88 | /** | ||
| 89 | * Skip bytes of input. | ||
| 90 | * @param n the number of bytes to be skipped | ||
| 91 | */ | ||
| 92 | public long skip(long n) throws IOException | ||
| 93 | { | ||
| 94 | if (n == 0) | ||
| 95 | return 0; | ||
| 96 | if (in == null) | ||
| 97 | in = owner.readNotify(); | ||
| 98 | return in.skip(n); | ||
| 99 | } | ||
| 100 | |||
| 101 | /** | ||
| 102 | * Return the number of bytes that can be read without blocking. | ||
| 103 | */ | ||
| 104 | public int available() throws IOException | ||
| 105 | { | ||
| 106 | if (in == null) | ||
| 107 | in = owner.readNotify(); | ||
| 108 | return in.available(); | ||
| 109 | } | ||
| 110 | |||
| 111 | /** | ||
| 112 | * Close the stream. | ||
| 113 | */ | ||
| 114 | public void close() throws IOException | ||
| 115 | { | ||
| 116 | owner.close(); | ||
| 117 | } | ||
| 118 | |||
| 119 | /** | ||
| 120 | * Mark the current position in the stream. | ||
| 121 | * @param readlimit how many bytes can be read before mark becomes invalid | ||
| 122 | */ | ||
| 123 | public synchronized void mark(int readlimit) | ||
| 124 | { | ||
| 125 | if (in == null) { | ||
| 126 | try { | ||
| 127 | in = owner.readNotify(); | ||
| 128 | } | ||
| 129 | catch (IOException e) { | ||
| 130 | return; | ||
| 131 | } | ||
| 132 | } | ||
| 133 | in.mark(readlimit); | ||
| 134 | } | ||
| 135 | |||
| 136 | /** | ||
| 137 | * Reposition the stream to the last marked position. | ||
| 138 | */ | ||
| 139 | public synchronized void reset() throws IOException | ||
| 140 | { | ||
| 141 | if (in == null) | ||
| 142 | in = owner.readNotify(); | ||
| 143 | in.reset(); | ||
| 144 | } | ||
| 145 | |||
| 146 | /** | ||
| 147 | * Return true if this stream type supports mark/reset. | ||
| 148 | */ | ||
| 149 | public boolean markSupported() | ||
| 150 | { | ||
| 151 | if (in == null) { | ||
| 152 | try { | ||
| 153 | in = owner.readNotify(); | ||
| 154 | } | ||
| 155 | catch (IOException e) { | ||
| 156 | return false; | ||
| 157 | } | ||
| 158 | } | ||
| 159 | return in.markSupported(); | ||
| 160 | } | ||
| 161 | } | ||