| /* |
| * Copyright (c) 1996, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package sun.rmi.transport.proxy; |
| |
| import java.io.*; |
| |
| /** |
| * The HttpSendInputStream class is used by the HttpSendSocket class as |
| * a layer on the top of the InputStream it returns so that it can be |
| * notified of attempts to read from it. This allows the HttpSendSocket |
| * to know when it should push across its output message. |
| */ |
| class HttpSendInputStream extends FilterInputStream { |
| |
| /** the HttpSendSocket object that is providing this stream */ |
| HttpSendSocket owner; |
| |
| /** |
| * Create new filter on a given input stream. |
| * @param in the InputStream to filter from |
| * @param owner the HttpSendSocket that is providing this stream |
| */ |
| public HttpSendInputStream(InputStream in, HttpSendSocket owner) |
| throws IOException |
| { |
| super(in); |
| |
| this.owner = owner; |
| } |
| |
| /** |
| * Mark this stream as inactive for its owner socket, so the next time |
| * a read is attempted, the owner will be notified and a new underlying |
| * input stream obtained. |
| */ |
| public void deactivate() |
| { |
| in = null; |
| } |
| |
| /** |
| * Read a byte of data from the stream. |
| */ |
| public int read() throws IOException |
| { |
| if (in == null) |
| in = owner.readNotify(); |
| return in.read(); |
| } |
| |
| /** |
| * Read into an array of bytes. |
| * @param b the buffer into which the data is to be read |
| * @param off the start offset of the data |
| * @param len the maximum number of bytes to read |
| */ |
| public int read(byte b[], int off, int len) throws IOException |
| { |
| if (len == 0) |
| return 0; |
| if (in == null) |
| in = owner.readNotify(); |
| return in.read(b, off, len); |
| } |
| |
| /** |
| * Skip bytes of input. |
| * @param n the number of bytes to be skipped |
| */ |
| public long skip(long n) throws IOException |
| { |
| if (n == 0) |
| return 0; |
| if (in == null) |
| in = owner.readNotify(); |
| return in.skip(n); |
| } |
| |
| /** |
| * Return the number of bytes that can be read without blocking. |
| */ |
| public int available() throws IOException |
| { |
| if (in == null) |
| in = owner.readNotify(); |
| return in.available(); |
| } |
| |
| /** |
| * Close the stream. |
| */ |
| public void close() throws IOException |
| { |
| owner.close(); |
| } |
| |
| /** |
| * Mark the current position in the stream. |
| * @param readlimit how many bytes can be read before mark becomes invalid |
| */ |
| public synchronized void mark(int readlimit) |
| { |
| if (in == null) { |
| try { |
| in = owner.readNotify(); |
| } |
| catch (IOException e) { |
| return; |
| } |
| } |
| in.mark(readlimit); |
| } |
| |
| /** |
| * Reposition the stream to the last marked position. |
| */ |
| public synchronized void reset() throws IOException |
| { |
| if (in == null) |
| in = owner.readNotify(); |
| in.reset(); |
| } |
| |
| /** |
| * Return true if this stream type supports mark/reset. |
| */ |
| public boolean markSupported() |
| { |
| if (in == null) { |
| try { |
| in = owner.readNotify(); |
| } |
| catch (IOException e) { |
| return false; |
| } |
| } |
| return in.markSupported(); |
| } |
| } |