content: /**
   * Copyright (C) 2015 Fernando Cejas 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.fernandocejas.android10.sample.presentation.mapper;
  
  import com.fernandocejas.android10.sample.domain.User;
  import com.fernandocejas.android10.sample.presentation.internal.di.PerActivity;
  import com.fernandocejas.android10.sample.presentation.model.UserModel;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Collections;
  import javax.inject.Inject;
  
  /**
   * Mapper class used to transform {@link User} (in the domain layer) to {@link UserModel} in the
   * presentation layer.
   */
  @PerActivity
  public class UserModelDataMapper {
  
    @Inject
    public UserModelDataMapper() {}
  
    /**
     * Transform a {@link User} into an {@link UserModel}.
     *
     * @param user Object to be transformed.
     * @return {@link UserModel}.
     */
    public UserModel transform(User user) {
      if (user == null) {
        throw new IllegalArgumentException("Cannot transform a null value");
      }
      final UserModel userModel = new UserModel(user.getUserId());
      userModel.setCoverUrl(user.getCoverUrl());
      userModel.setFullName(user.getFullName());
      userModel.setEmail(user.getEmail());
      userModel.setDescription(user.getDescription());
      userModel.setFollowers(user.getFollowers());
  
      return userModel;
    }
  
    /**
     * Transform a Collection of {@link User} into a Collection of {@link UserModel}.
     *
     * @param usersCollection Objects to be transformed.
     * @return List of {@link UserModel}.
     */
    public Collection<UserModel> transform(Collection<User> usersCollection) {
      Collection<UserModel> userModelsCollection;
  
      if (usersCollection != null && !usersCollection.isEmpty()) {
        userModelsCollection = new ArrayList<>();
        for (User user : usersCollection) {
          userModelsCollection.add(transform(user));
        }
      } else {
        userModelsCollection = Collections.emptyList();
      }
  
      return userModelsCollection;
    }
  }
  