1 /* 2 * Copyright (C) 2019 The Dagger Authors. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package dagger.example.atm; 18 19 import java.util.List; 20 21 /** Abstract command that accepts a single argument. */ 22 abstract class SingleArgCommand implements Command { 23 24 @Override handleInput(List<String> input)25 public final Result handleInput(List<String> input) { 26 return input.size() == 1 ? handleArg(input.get(0)) : Result.invalid(); 27 } 28 29 /** Handles the single argument to the command. */ handleArg(String arg)30 protected abstract Result handleArg(String arg); 31 } 32