111 lines
3.8 KiB
Plaintext
111 lines
3.8 KiB
Plaintext
-- Copyright (c) 2003-2007 ETH Zurich, Switzerland
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-- 2016 The University of Sheffield, UK
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--
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-- All rights reserved.
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--
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-- Redistribution and use in source and binary forms, with or without
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-- modification, are permitted provided that the following conditions are met:
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--
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-- * Redistributions of source code must retain the above copyright notice, this
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-- list of conditions and the following disclaimer.
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--
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-- * Redistributions in binary form must reproduce the above copyright notice,
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-- this list of conditions and the following disclaimer in the documentation
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-- and/or other materials provided with the distribution.
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--
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-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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-- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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-- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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-- DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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-- FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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-- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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-- SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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-- CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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-- OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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-- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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--
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-- SPDX-License-Identifier: BSD-2-Clause
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--
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package ISP
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--
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-- Consitency
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-- ==========
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-- For the service ``1GB'' the free download variable should be
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-- invariant and be set to 1.
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context Max1GB
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inv : self.oclAsType(ISP.Service).freedownload = 1024
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-- [Enc] inv : self.freedownload = 1024
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-- A customer can only have a service from his service provider
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context Provider
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inv onlyOfferedService: self.services->includesAll(self.customer
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->collect(c:Customer | c.service)->asSet())
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-- If the download rate of a customer (in Surf-Record) is lower than the
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-- freedownload of his service, then the amount_of_money in his bill is
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-- equal to the price in the service.
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context Bill
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inv: self.surfRecord.downloadRate <= self.service.freedownload
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implies self.amount = self.service.price
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-- If the bill has not been paid for 30 days, the customer's flag active
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-- will be set to false
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context Customer
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inv: self.bill.send_date.durationInDays(self.bill.paid_date.today()) > 30
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and
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self.bill.send_date.durationInDays(self.bill.paid_date) > 30
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implies not self.active
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--
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--
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context SurfRecord::setRate(rate:Integer):Integer
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pre: true
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post: (result = if rate > downloadRate then rate
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else downloadRate endif)
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and
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(rate > downloadRate implies downloadRate = rate)
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and
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(rate <= downloadRate implies downloadRate = downloadRate@pre)
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--
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--
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context Customer
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-- [Enc] inv: self.allInstances()->isUnique(self.id)
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inv: self.allInstances()->forAll(
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c1:Customer, c2:Customer | c1.id = c2.id implies c1 =c2)
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--
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--
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context Provider::reenableCustomer(c:Customer):void
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pre: not c.active
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post: c.active
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--
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-- Security
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-- ==========
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--
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--
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context Customer::changeService(s:Service):Boolean
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pre perm0: s.customer.oclAsType(oclLib.OclAny) = environment.caller.oclAsType(oclLib.OclAny)
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-- pre perm0: s.customer = environment.caller
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--
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-- A customer can only view his own downloadrate
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context SurfRecord::getRate():Integer
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pre perm1: environment.caller.oclAsType(oclLib.OclAny) = self.customer.oclAsType(oclLib.OclAny)
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-- pre perm1: environment.caller = self.customer
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--
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context SurfRecord::setRate(rate:Integer):Integer
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pre perm2: environment.caller.role = 'Provider'
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--
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context Bill::confirm_payment():Boolean
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pre prem3: environment.caller.role = 'Provider'
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endpackage
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