KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > jruby > util > IOHandlerSocket


1 /***** BEGIN LICENSE BLOCK *****
2  * Version: CPL 1.0/GPL 2.0/LGPL 2.1
3  *
4  * The contents of this file are subject to the Common Public
5  * License Version 1.0 (the "License"); you may not use this file
6  * except in compliance with the License. You may obtain a copy of
7  * the License at http://www.eclipse.org/legal/cpl-v10.html
8  *
9  * Software distributed under the License is distributed on an "AS
10  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
11  * implied. See the License for the specific language governing
12  * rights and limitations under the License.
13  *
14  * Copyright (C) 2006 Evan <evan@heron.sytes.net>
15  *
16  * Alternatively, the contents of this file may be used under the terms of
17  * either of the GNU General Public License Version 2 or later (the "GPL"),
18  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
19  * in which case the provisions of the GPL or the LGPL are applicable instead
20  * of those above. If you wish to allow use of your version of this file only
21  * under the terms of either the GPL or the LGPL, and not to allow others to
22  * use your version of this file under the terms of the CPL, indicate your
23  * decision by deleting the provisions above and replace them with the notice
24  * and other provisions required by the GPL or the LGPL. If you do not delete
25  * the provisions above, a recipient may use your version of this file under
26  * the terms of any one of the CPL, the GPL or the LGPL.
27  ***** END LICENSE BLOCK *****/

28 package org.jruby.util;
29
30 import java.io.EOFException JavaDoc;
31 import java.io.IOException JavaDoc;
32 import java.io.InputStream JavaDoc;
33 import java.io.OutputStream JavaDoc;
34
35 import org.jruby.Ruby;
36 import org.jruby.util.IOHandlerUnseekable;
37
38 public class IOHandlerSocket extends IOHandlerUnseekable {
39     public IOHandlerSocket(Ruby runtime, InputStream JavaDoc inStream, OutputStream JavaDoc outStream)
40         throws IOException JavaDoc {
41         super(runtime, inStream, outStream);
42     }
43
44     public ByteList recv(int len) throws IOException JavaDoc, BadDescriptorException {
45         if(!isOpen()) {
46             throw new IOException JavaDoc("Socket not open");
47         }
48         if(len < 1) {
49             return new ByteList(ByteList.NULL_ARRAY);
50         }
51
52         // this should provide blocking until data is available...
53
int c = sysread();
54         if (c == -1) {
55             throw new EOFException JavaDoc();
56         }
57         int available = getInputStream().available();
58         len = len - 1 < available ? len - 1 : available;
59         ByteList buf = new ByteList(len + 1);
60         buf.append(c);
61         sysread(buf, 1, len);
62         return buf;
63     }
64 }
65
Popular Tags