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UserRepository.java
/* * Copyright (C) 2017 The Android Open Source Project * * 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 com.android.example.github.repository; import com.android.example.github.AppExecutors; import com.android.example.github.api.ApiResponse; import com.android.example.github.api.GithubService; import com.android.example.github.db.UserDao; import com.android.example.github.vo.Resource; import com.android.example.github.vo.User; import android.arch.lifecycle.LiveData; import android.support.annotation.NonNull; import android.support.annotation.Nullable; import javax.inject.Inject; import javax.inject.Singleton; /** * Repository that handles User objects. */ @Singleton public class UserRepository { private final UserDao userDao; private final GithubService githubService; private final AppExecutors appExecutors; @Inject UserRepository(AppExecutors appExecutors, UserDao userDao, GithubService githubService) { this.userDao = userDao; this.githubService = githubService; this.appExecutors = appExecutors; } public LiveData
> loadUser(String login) { return new NetworkBoundResource
(appExecutors) { @Override protected void saveCallResult(@NonNull User item) { userDao.insert(item); } @Override protected boolean shouldFetch(@Nullable User data) { return data == null; } @NonNull @Override protected LiveData
loadFromDb() { return userDao.findByLogin(login); } @NonNull @Override protected LiveData
> createCall() { return githubService.getUser(login); } }.asLiveData(); } }