/src/lib/io/filter/monitored_output_stream.e

 1-- This file is part of a Liberty Eiffel library.
 2-- See the full copyright at the end.
 3--
 4class MONITORED_OUTPUT_STREAM
 5   --
 6   -- An output stream monitor. Monitored data goes to another output stream.
 7   --
 8   -- See also MONITORED_INPUT_STREAM
 9   --
10
11inherit
12   FILTER_OUTPUT_STREAM
13      rename
14         connect_to as reconnect_to
15      end
16
17create {ANY}
18   connect_to
19
20feature {ANY}
21   monitor: OUTPUT_STREAM
22
23feature {}
24   local_can_disconnect: BOOLEAN True
25
26feature {FILTER_OUTPUT_STREAM}
27   filtered_put_character (c: CHARACTER)
28      do
29         stream.filtered_put_character(c)
30         if monitor.is_connected then
31            monitor.put_character(c)
32         end
33      end
34
35   filtered_flush
36      do
37         stream.filtered_flush
38      end
39
40feature {}
41   connect_to (a_stream: like stream; a_monitor: like monitor)
42      require
43         a_stream /= Void
44         a_monitor /= Void
45      do
46         a_stream.set_filter(Current)
47         stream := a_stream
48         monitor := a_monitor
49      ensure
50         stream = a_stream
51         monitor = a_monitor
52      end
53
54invariant
55   stream /= Void
56   monitor /= Void
57
58end -- class MONITORED_OUTPUT_STREAM
59--
60-- Copyright (C) 2009-2017: by all the people cited in the AUTHORS file.
61--
62-- Permission is hereby granted, free of charge, to any person obtaining a copy
63-- of this software and associated documentation files (the "Software"), to deal
64-- in the Software without restriction, including without limitation the rights
65-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
66-- copies of the Software, and to permit persons to whom the Software is
67-- furnished to do so, subject to the following conditions:
68--
69-- The above copyright notice and this permission notice shall be included in
70-- all copies or substantial portions of the Software.
71--
72-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
73-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
74-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
75-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
76-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
77-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
78-- THE SOFTWARE.