/*
* Copyright 2012-2017 the original author or 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 sample.data.jpa.service;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import sample.data.jpa.domain.City;
import sample.data.jpa.domain.Hotel;
import sample.data.jpa.domain.Rating;
import sample.data.jpa.domain.RatingCount;
import sample.data.jpa.domain.Review;
import sample.data.jpa.domain.ReviewDetails;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.Assert;
@Component("hotelService")
@Transactional
class HotelServiceImpl implements HotelService {
private final HotelRepository hotelRepository;
private final ReviewRepository reviewRepository;
public HotelServiceImpl(HotelRepository hotelRepository,
ReviewRepository reviewRepository) {
this.hotelRepository = hotelRepository;
this.reviewRepository = reviewRepository;
}
@Override
public Hotel getHotel(City city, String name) {
Assert.notNull(city, "City must not be null");
Assert.hasLength(name, "Name must not be empty");
return this.hotelRepository.findByCityAndName(city, name);
}
@Override
public Page<Review> getReviews(Hotel hotel, Pageable pageable) {
Assert.notNull(hotel, "Hotel must not be null");
return this.reviewRepository.findByHotel(hotel, pageable);
}
@Override
public Review getReview(Hotel hotel, int reviewNumber) {
Assert.notNull(hotel, "Hotel must not be null");
return this.reviewRepository.findByHotelAndIndex(hotel, reviewNumber);
}
@Override
public Review addReview(Hotel hotel, ReviewDetails details) {
Review review = new Review(hotel, 1, details);
return this.reviewRepository.save(review);
}
@Override
public ReviewsSummary getReviewSummary(Hotel hotel) {
List<RatingCount> ratingCounts = this.hotelRepository.findRatingCounts(hotel);
return new ReviewsSummaryImpl(ratingCounts);
}
private static class ReviewsSummaryImpl implements ReviewsSummary {
private final Map<Rating, Long> ratingCount;
public ReviewsSummaryImpl(List<RatingCount> ratingCounts) {
this.ratingCount = new HashMap<>();
for (RatingCount ratingCount : ratingCounts) {
this.ratingCount.put(ratingCount.getRating(), ratingCount.getCount());
}
}
@Override
public long getNumberOfReviewsWithRating(Rating rating) {
Long count = this.ratingCount.get(rating);
return count == null ? 0 : count;
}
}
}