1 /* 2 * Copyright (C) 2017 The Android Open Source Project 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 com.android.dialer.assisteddialing; 18 19 import android.annotation.TargetApi; 20 import android.os.Build.VERSION_CODES; 21 import android.support.annotation.NonNull; 22 import java.util.Optional; 23 24 /** A stub assisted dialing implementation. */ 25 public final class AssistedDialingMediatorStub implements AssistedDialingMediator { 26 27 /** Always returns an empty Optional. */ 28 @Override 29 @SuppressWarnings("AndroidApiChecker") // Use of optional 30 @TargetApi(VERSION_CODES.N) attemptAssistedDial(@onNull String numberToTransform)31 public Optional<TransformationInfo> attemptAssistedDial(@NonNull String numberToTransform) { 32 return Optional.empty(); 33 } 34 35 /** Always returns an empty Optional. */ 36 @Override 37 @SuppressWarnings("AndroidApiChecker") // Use of optional 38 @TargetApi(VERSION_CODES.N) userHomeCountryCode()39 public Optional<String> userHomeCountryCode() { 40 return Optional.empty(); 41 } 42 43 @Override isPlatformEligible()44 public boolean isPlatformEligible() { 45 return false; 46 } 47 } 48