68 lines
2.2 KiB
Java
68 lines
2.2 KiB
Java
/*
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* Copyright (C) 2019 The Dagger Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dagger.example.atm;
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import dagger.example.atm.Database.Account;
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import java.math.BigDecimal;
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import javax.inject.Inject;
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/** Withdraws money from the ATM. */
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final class WithdrawCommand extends BigDecimalCommand {
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private final Outputter outputter;
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private final Account account;
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private final BigDecimal minimumBalance;
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private final WithdrawalLimiter withdrawalLimiter;
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@Inject
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WithdrawCommand(
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Outputter outputter,
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Account account,
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@MinimumBalance BigDecimal minimumBalance,
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WithdrawalLimiter withdrawalLimiter) {
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super(outputter);
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this.outputter = outputter;
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this.account = account;
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this.minimumBalance = minimumBalance;
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this.withdrawalLimiter = withdrawalLimiter;
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}
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@Override
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protected void handleAmount(BigDecimal amount) {
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BigDecimal remainingWithdrawalLimit = withdrawalLimiter.remainingWithdrawalLimit();
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if (amount.compareTo(remainingWithdrawalLimit) > 0) {
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outputter.output(
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String.format(
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"you may not withdraw %s; you may withdraw %s more in this session",
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amount, remainingWithdrawalLimit));
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return;
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}
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BigDecimal newBalance = account.balance().subtract(amount);
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if (newBalance.compareTo(minimumBalance) < 0) {
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outputter.output(
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String.format(
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"you don't have sufficient funds to withdraw %s. "
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+ "your balance is %s and the minimum balance is %s",
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amount, account.balance(), minimumBalance));
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} else {
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account.withdraw(amount);
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withdrawalLimiter.recordWithdrawal(amount);
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outputter.output("your new balance is: " + account.balance());
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}
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}
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}
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