com.speedment.example.basic_example.extra.UsersGuide Maven / Gradle / Ivy
/**
*
* Copyright (c) 2006-2019, Speedment, Inc. All Rights Reserved.
*
* 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.speedment.example.basic_example.extra;
import com.company.sakila.SakilaApplication;
import com.company.sakila.db0.sakila.film.Film;
import com.company.sakila.db0.sakila.film.FilmManager;
import com.speedment.common.tuple.Tuple2;
import com.speedment.common.tuple.Tuples;
import com.speedment.example.basic_example.util.ExampleUtil;
import java.util.List;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
import java.util.stream.Stream;
import static com.speedment.example.basic_example.util.ExampleUtil.buildApplication;
import static java.util.stream.Collectors.toList;
/**
*
* @author Per Minborg
*/
public class UsersGuide {
private final SakilaApplication app;
private final FilmManager films;
public UsersGuide() {
app = buildApplication();
films = app.getOrThrow(FilmManager.class);
}
public static void main(String[] args) {
new UsersGuide().run();
}
private void run() {
distinct();
mapToInt();
mapToTuple();
findId();
}
private void distinct() {
Set ratings = films.stream()
.map(Film.RATING)
.distinct()
.collect(Collectors.toSet());
System.out.println(ratings);
}
private void mapToInt() {
final IntStream ids = films.stream()
.mapToInt(Film.FILM_ID);
ids.forEach(System.out::println);
}
private void mapToTuple() {
Stream> items = films.stream()
.map(Tuples.toTuple(Film.TITLE, Film.LENGTH.getter()));
items.forEach(System.out::println);
}
private void findId() {
int id = 100;
final Optional title = films.stream()
.filter(Film.FILM_ID.equal(id)) // find the films we are looking for
.map(Film.TITLE) // switch from a stream of films to one of titles
.findAny(); // we want the first and only match for this unique key
if (title.isPresent()) {
System.out.format("Film ID %d has title %s.", id, title.get());
} else {
System.out.format("Film ID not found.", id);
}
}
}
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