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comparison tango/example/conduits/composite.d @ 132:1700239cab2e trunk

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[svn r136] MAJOR UNSTABLE UPDATE!!! Initial commit after moving to Tango instead of Phobos. Lots of bugfixes... This build is not suitable for most things.
author lindquist
date Fri, 11 Jan 2008 17:57:40 +0100
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131:5825d48b27d1 132:1700239cab2e
1
2 private import tango.io.protocol.Reader,
3 tango.io.protocol.Writer,
4 tango.io.FileConduit;
5
6 /*******************************************************************************
7
8 Use cascading reads & writes to handle a composite class. There is
9 just one primary call for output, and just one for input, but the
10 classes propogate the request as appropriate.
11
12 Note that the class instances don't know how their content will be
13 represented; that is dictated by the caller (via the reader/writer
14 implementation).
15
16 Note also that this only serializes the content. To serialize the
17 classes too, take a look at the Pickle.d example.
18
19 *******************************************************************************/
20
21 void main()
22 {
23 // define a serializable class (via interfaces)
24 class Wumpus : IReadable, IWritable
25 {
26 private int a = 11,
27 b = 112,
28 c = 1024;
29
30 void read (IReader input)
31 {
32 input (a) (b) (c);
33 }
34
35 void write (IWriter output)
36 {
37 output (a) (b) (c);
38 }
39 }
40
41
42 // define a serializable class (via interfaces)
43 class Wombat : IReadable, IWritable
44 {
45 private Wumpus wumpus;
46 private char[] x = "xyz";
47 private bool y = true;
48 private float z = 3.14159;
49
50 this (Wumpus wumpus)
51 {
52 this.wumpus = wumpus;
53 }
54
55 void read (IReader input)
56 {
57 input (x) (y) (z) (wumpus);
58 }
59
60 void write (IWriter output)
61 {
62 output (x) (y) (z) (wumpus);
63 }
64 }
65
66 // construct a Wombat
67 auto wombat = new Wombat (new Wumpus);
68
69 // open a file for IO
70 auto file = new FileConduit ("random.bin", FileConduit.ReadWriteCreate);
71
72 // construct reader & writer upon the file, with binary IO
73 auto output = new Writer (file);
74 auto input = new Reader (file);
75
76 // write both Wombat & Wumpus (and flush them)
77 output (wombat) ();
78
79 // rewind to file start
80 file.seek (0);
81
82 // read both back again
83 input (wombat);
84 }
85