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|
note
description: "Summary description for {ACCOUNT}."
author: ""
date: "$Date$"
revision: "$Revision$"
class
ACCOUNT
create
make
-- TODO
-- interest should defined by bank (via make?)
-- add more checks to invariant (like balance >= creditline) ?
-- check if balance is a getter and not a setter (doesn't has an assign)
-- + check if authorized_signers is a getter and not a setter (it doesn't has an assign)
-- -> if not: add a getter (via Result or so..) and move them to {NONE}
-- much other stuff to test like: lower creditline so that balance will be invalid
feature -- Access
transfer_minamount: REAL_64 assign set_transfer_minamount
-- Mindestbetrag für jede Einzahlung, Auszahlung und Überweisung
authorized_signers: ARRAYED_SET [PERSON]
-- Zeichnungsberechtigte
attribute Result := ({like authorized_signers}).default end --| Remove line when Void Safety is properly set
creditline: REAL_64 assign set_creditline
-- Kreditrahmen
interest_deposit: REAL_64 assign set_interest_deposit
-- Habenverzinsung
interest_debit: REAL_64 assign set_interest_debit
-- Sollverzinsung
balance: REAL_64
-- Kontostand
feature {NONE} -- Initialization
make (an_authorized_signer: PERSON)
do
create authorized_signers.make(1)
add_authorized_signer (an_authorized_signer)
transfer_minamount := 2
balance := 0
end
feature -- Basic operations
deposit (an_amount: like transfer_minamount; an_authorized_signer: PERSON)
require
an_authorized_signer_authorized: authorized_signers.has (an_authorized_signer)
an_amount_positive: an_amount > 0.0
transfer_minamount_ok: an_amount >= transfer_minamount
do
balance := balance + an_amount
ensure
balance_increased: balance > old balance
deposited: balance = old balance + an_amount
end
withdraw (an_amount: like transfer_minamount; an_authorized_signer: PERSON)
require
an_authorized_signer_authorized: authorized_signers.has (an_authorized_signer)
an_amount_positive: an_amount > 0.0
transfer_minamount_ok: an_amount >= transfer_minamount
do
balance := balance - an_amount
ensure
balance_decreased: balance < old balance
withdrawed: balance = old balance - an_amount
creditline_ok: balance >= creditline
end
transfer(an_amount: like transfer_minamount; an_authorized_signer: PERSON; an_account: like Current; another_authorized_signer: PERSON;)
require
an_account_attached: an_account /= Void
do
withdraw (an_amount, an_authorized_signer)
an_account.deposit (an_amount, another_authorized_signer)
end
add_authorized_signer (an_authorized_signer: PERSON)
require
an_authorized_signer_attached: an_authorized_signer /= Void
an_authorized_signer_notinlist: not authorized_signers.has (an_authorized_signer)
do
authorized_signers.put (an_authorized_signer)
ensure
authorized_signers_assigned: authorized_signers.has (an_authorized_signer)
end
remove_authorized_signer (an_authorized_signer: PERSON)
require
an_authorized_signer_attached: an_authorized_signer /= Void
an_authorized_signer_inlist: authorized_signers.has (an_authorized_signer)
authorized_signers_never_empty: authorized_signers.count >= 2
do
authorized_signers.prune (an_authorized_signer)
ensure
authorized_signers_assigned: not authorized_signers.has (an_authorized_signer)
end
feature {NONE} -- Implementation
set_transfer_minamount (a_transfer_minamount: like transfer_minamount)
-- Assign `transfer_minamount' with `a_transfer_minamount'.
require
a_transfer_minamount_positive: a_transfer_minamount > 0.0
do
transfer_minamount := a_transfer_minamount
ensure
transfer_minamount_assigned: transfer_minamount = a_transfer_minamount
end
set_creditline (a_creditline: like creditline)
-- Assign `creditline' with `a_creditline'.
do
creditline := a_creditline
ensure
creditline_assigned: creditline = a_creditline
end
set_interest_deposit (an_interest_deposit: like interest_deposit)
-- Assign `interest_deposit' with `an_interest_deposit'.
require
an_interest_deposit_within_bounds: an_interest_deposit >= 0.0 and an_interest_deposit <= 1.0
do
interest_deposit := an_interest_deposit
ensure
interest_deposit_assigned: interest_deposit = an_interest_deposit
end
set_interest_debit (an_interest_debit: like interest_debit)
-- Assign `interest_debit' with `an_interest_debit'.
require
an_interest_debit_within_bounds: an_interest_debit >= 0.0 and an_interest_debit <= 1.0
do
interest_debit := an_interest_debit
ensure
interest_debit_assigned: interest_debit = an_interest_debit
end
invariant
interest_debit_within_bounds: interest_debit >= 0.0 and interest_debit <= 1.0
interest_deposit_within_bounds: interest_deposit >= 0.0 and interest_deposit <= 1.0
authorized_signers_attached: authorized_signers /= Void
authorized_signers_not_empty: authorized_signers.count > 0
transfer_minamount_positive: transfer_minamount > 0.0
end
|
