/*

* 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.util.List;

/** Abstract command that accepts a single argument. */

abstract class SingleArgCommand implements Command {

@Override

public final Result handleInput(List<String> input) {

return input.size() == 1 ? handleArg(input.get(0)) : Result.invalid();

}

/** Handles the single argument to the command. */

protected abstract Result handleArg(String arg);

}