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/src/lib/design_patterns/factory.e

http://github.com/tybor/Liberty
Specman e | 47 lines | 8 code | 2 blank | 37 comment | 0 complexity | dcaadbf970f6e9e4f77d4272c1d87f61 MD5 | raw file
 1-- This file is part of a Liberty Eiffel library.
 2-- See the full copyright at the end.
 3--
 4deferred class FACTORY[O_]
 5   --
 6   -- The ''Abstract Factory'' Design Pattern.
 7   --
 8   -- Usage: usually, write one FACTORY per concrete class. Several can be merged in a single class using
 9   -- Eiffel renaming facilities:
10   --
11   --  class FRUIT_FACTORY
12   --  insert
13   --     FACTORY[APPLE] rename new as new_apple end
14   --     FACTORY[PEAR]  rename new as new_pear end
15   --     ...
16   --  end
17   --
18
19feature {ANY}
20   new: O_
21         -- Create a new object.
22      deferred
23      ensure
24         Result /= Void
25      end
26
27end -- class FACTORY
28--
29-- Copyright (C) 2009-2017: by all the people cited in the AUTHORS file.
30--
31-- Permission is hereby granted, free of charge, to any person obtaining a copy
32-- of this software and associated documentation files (the "Software"), to deal
33-- in the Software without restriction, including without limitation the rights
34-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
35-- copies of the Software, and to permit persons to whom the Software is
36-- furnished to do so, subject to the following conditions:
37--
38-- The above copyright notice and this permission notice shall be included in
39-- all copies or substantial portions of the Software.
40--
41-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
42-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
43-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
44-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
45-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
46-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
47-- THE SOFTWARE.