/src/lib/design_patterns/chain_handler.e

http://github.com/tybor/Liberty · Specman e · 45 lines · 14 code · 3 blank · 28 comment · 0 complexity · a4800ee928ff0cae631c99cb1f81b9d7 MD5 · raw file

  1. -- This file is part of a Liberty Eiffel library.
  2. -- See the full copyright at the end.
  3. --
  4. deferred class CHAIN_HANDLER[C_ -> CHAIN_OF_RESPONSIBILITY]
  5. --
  6. -- Part of a chain of responsibility. It must tell if it is able to handle a request, and then handle it.
  7. --
  8. feature {CHAIN_OF_RESPONSIBILITY}
  9. can_handle (chain: C_): BOOLEAN
  10. -- True if the handler can indeed handle a request from the given chain of responsibility.
  11. require
  12. chain /= Void
  13. deferred
  14. end
  15. handle (chain: C_)
  16. -- Handle a request from the given chain of responsibility.
  17. require
  18. chain /= Void
  19. can_handle(chain)
  20. deferred
  21. end
  22. end -- class CHAIN_HANDLER
  23. --
  24. -- Copyright (C) 2009-2017: by all the people cited in the AUTHORS file.
  25. --
  26. -- Permission is hereby granted, free of charge, to any person obtaining a copy
  27. -- of this software and associated documentation files (the "Software"), to deal
  28. -- in the Software without restriction, including without limitation the rights
  29. -- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  30. -- copies of the Software, and to permit persons to whom the Software is
  31. -- furnished to do so, subject to the following conditions:
  32. --
  33. -- The above copyright notice and this permission notice shall be included in
  34. -- all copies or substantial portions of the Software.
  35. --
  36. -- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  37. -- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  38. -- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  39. -- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  40. -- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  41. -- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  42. -- THE SOFTWARE.