io.github.cdelmas.spike.springboot.car.CarsController.java Source code

Introduction

Here is the source code for io.github.cdelmas.spike.springboot.car.CarsController.java

Source

/*
   Copyright 2015 Cyril Delmas
    
   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 io.github.cdelmas.spike.springboot.car;

import io.github.cdelmas.spike.common.domain.Car;
import io.github.cdelmas.spike.common.domain.CarRepository;
import org.springframework.cloud.security.oauth2.resource.EnableOAuth2Resource;
import org.springframework.hateoas.Link;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.context.request.WebRequest;

import javax.inject.Inject;
import javax.servlet.ServletRequest;
import javax.servlet.http.HttpServletRequest;
import java.util.List;
import java.util.Optional;

import static java.util.stream.Collectors.toList;
import static org.springframework.hateoas.mvc.ControllerLinkBuilder.linkTo;
import static org.springframework.hateoas.mvc.ControllerLinkBuilder.methodOn;

@EnableOAuth2Resource
@RestController
@RequestMapping(value = "/cars", produces = "application/json")
public class CarsController {

    private final CarRepository carRepository;

    @Inject
    public CarsController(CarRepository carRepository) {
        this.carRepository = carRepository;
    }

    @RequestMapping(method = RequestMethod.GET)
    public ResponseEntity<List<CarRepresentation>> allCars() {
        List<Car> cars = carRepository.all();
        HttpHeaders responseHeaders = new HttpHeaders();
        responseHeaders.set("total-count", String.valueOf(cars.size()));
        return new ResponseEntity<>(cars.stream().map(this::toCarRepresentation).collect(toList()), responseHeaders,
                HttpStatus.OK);
    }

    @RequestMapping(value = "/{id}", method = RequestMethod.GET)
    public ResponseEntity<CarRepresentation> byId(@PathVariable("id") String carId) {
        Optional<Car> car = carRepository.byId(Integer.parseInt(carId));
        return car.map(c -> {
            CarRepresentation rep = toCarRepresentation(c);
            return new ResponseEntity<>(rep, HttpStatus.OK);
        }).orElse(new ResponseEntity<>(HttpStatus.NOT_FOUND));
    }

    private CarRepresentation toCarRepresentation(Car c) {
        String carId = String.valueOf(c.getId());
        CarRepresentation rep = new CarRepresentation(c);
        rep.add(linkTo(methodOn(CarsController.class).byId(carId)).withSelfRel());
        return rep;
    }

    @RequestMapping(method = RequestMethod.POST, consumes = "application/json")
    public ResponseEntity<CarRepresentation> create(@RequestBody Car car) {
        carRepository.save(car);
        HttpHeaders responseHeaders = new HttpHeaders();
        Link link = linkTo(methodOn(CarsController.class).byId(String.valueOf(car.getId()))).withSelfRel();
        responseHeaders.set("Location", link.getHref());
        return new ResponseEntity<>(responseHeaders, HttpStatus.CREATED);
    }
}