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 | +} | |