note description: "[ The service interface for retrieving the global service provider. ]" legal: "See notice at end of class." status: "See notice at end of class."; date: "$Date$"; revision: "$Revision$" frozen class SERVICE_PROVIDER_S inherit SERVICE_I SERVICE_PROVIDER_I DISPOSABLE_SAFE redefine is_interface_usable end create make feature {NONE} -- Initialization make (a_provider: like provider) -- Initializes the service provider service with an actual provider. -- -- `a_provider': The actual service provider use to delegate calls to. require a_provider_attached: a_provider /= Void do provider := a_provider ensure provider_set: provider = a_provider end feature {NONE} -- Clean up safe_dispose (a_explicit: BOOLEAN) -- do end feature {NONE} -- Access provider: SERVICE_PROVIDER_I -- Actual service provider to perform operations on. feature -- Status report is_interface_usable: BOOLEAN -- do Result := Precursor and then (attached {USABLE_I} provider as l_usable) implies l_usable.is_interface_usable ensure then provider_is_interface_usable: (attached {USABLE_I} provider as l_usable) implies l_usable.is_interface_usable end feature -- Query service (a_type: TYPE [SERVICE_I]): detachable SERVICE_I -- do Result := provider.service (a_type) end invariant provider_attached: provider /= Void ;note copyright: "Copyright (c) 1984-2009, Eiffel Software" license: "GPL version 2 (see http://www.eiffel.com/licensing/gpl.txt)" licensing_options: "http://www.eiffel.com/licensing" copying: "[ This file is part of Eiffel Software's Eiffel Development Environment. Eiffel Software's Eiffel Development Environment is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2 of the License (available at the URL listed under "license" above). Eiffel Software's Eiffel Development Environment is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Eiffel Software's Eiffel Development Environment; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA ]" source: "[ Eiffel Software 5949 Hollister Ave., Goleta, CA 93117 USA Telephone 805-685-1006, Fax 805-685-6869 Website http://www.eiffel.com Customer support http://support.eiffel.com ]" end