01: /***** BEGIN LICENSE BLOCK *****
02: * Version: CPL 1.0/GPL 2.0/LGPL 2.1
03: *
04: * The contents of this file are subject to the Common Public
05: * License Version 1.0 (the "License"); you may not use this file
06: * except in compliance with the License. You may obtain a copy of
07: * the License at http://www.eclipse.org/legal/cpl-v10.html
08: *
09: * 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 Ola Bini <Ola.Bini@ki.se>
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 *****/package org.jruby.util;
28:
29: import java.io.OutputStream;
30: import java.io.IOException;
31: import org.jruby.RubyString;
32: import org.jruby.runtime.builtin.IRubyObject;
33:
34: /**
35: * This class wraps a IRubyObject in an OutputStream. Depending on which messages
36: * the IRubyObject answers to, it will have different functionality.
37: *
38: * The point is that the IRubyObject could exhibit duck typing, in the style of IO versus StringIO, for example.
39: *
40: * At the moment, the only functionality supported is writing, and the only requirement on the io-object is
41: * that it responds to write() and close() like IO.
42: *
43: * @author <a href="mailto:Ola.Bini@ki.se">Ola Bini</a>
44: */
45: public class IOOutputStream extends OutputStream {
46: private IRubyObject io;
47:
48: /**
49: * Creates a new OutputStream with the object provided.
50: *
51: * @param io the ruby object
52: */
53: public IOOutputStream(final IRubyObject io) {
54: if (!io.respondsTo("write")) {
55: throw new IllegalArgumentException(
56: "Object: "
57: + io
58: + " is not a legal argument to this wrapper, cause it doesn't respond to \"write\".");
59: }
60: this .io = io;
61: }
62:
63: public void write(final int bite) throws IOException {
64: io.callMethod(io.getRuntime().getCurrentContext(), "write",
65: RubyString.newString(io.getRuntime(), new ByteList(
66: new byte[] { (byte) bite }, false)));
67: }
68:
69: public void write(final byte[] b) throws IOException {
70: write(b, 0, b.length);
71: }
72:
73: public void write(final byte[] b, final int off, final int len)
74: throws IOException {
75: io.callMethod(io.getRuntime().getCurrentContext(), "write",
76: RubyString.newString(io.getRuntime(), new ByteList(b,
77: off, len, false)));
78: }
79:
80: public void close() throws IOException {
81: io.callMethod(io.getRuntime().getCurrentContext(), "close");
82: }
83: }
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