java/dagger/example/atm/Database.java

/*
 * Copyright (C) 2019 The Dagger Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package dagger.example.atm;

import java.math.BigDecimal;

/** An ATM database. */
interface Database {
  Account getAccount(String username);

  /** An individual user's account. */
  interface Account {
    String username();

    void deposit(BigDecimal amount);

    void withdraw(BigDecimal amount);

    BigDecimal balance();
  }
}