net.eusashead.hateoas.springhalbuilder.controller.CustomerController.java Source code

Introduction

Here is the source code for net.eusashead.hateoas.springhalbuilder.controller.CustomerController.java

Source

package net.eusashead.hateoas.springhalbuilder.controller;

/*
 * #[license]
 * Spring HalBuilder Example Webapp
 * %%
 * Copyright (C) 2013 Eusa's Head
 * %%
 * 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.
 * %[license]
 */

import net.eusashead.hateoas.hal.response.HalResponseBuilder;
import net.eusashead.hateoas.response.DeleteResponseBuilder;
import net.eusashead.hateoas.response.OptionsResponseBuilder;
import net.eusashead.hateoas.response.PutResponseBuilder;
import net.eusashead.hateoas.springhalbuilder.model.Customer;
import net.eusashead.hateoas.springhalbuilder.repository.CustomerRepository;
import net.eusashead.hateoas.springhalbuilder.repository.OrderRepository;
import net.eusashead.hateoas.springhalbuilder.representation.CustomerRepresentationWriter;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.transaction.annotation.Transactional;
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 com.theoryinpractise.halbuilder.api.Representation;

@Controller
@RequestMapping(CustomerController.URI_TEMPLATE)
public class CustomerController {

    public static final String URI_TEMPLATE = "/customer/{id}";

    @Autowired
    private CustomerRepository customerRepository;

    @Autowired
    private OrderRepository orderRepository;

    @RequestMapping(method = RequestMethod.OPTIONS)
    public ResponseEntity<Void> options(OptionsResponseBuilder<Void> builder) {
        return builder.allow(HttpMethod.GET, HttpMethod.HEAD).build();
    }

    /**
     * Get a {@link Customer} by 
     * identifier in HAL 
     * {@link Representation} format
     * 
     * @param id identifier of the {@link Customer} to delete
     * @param builder {@link HalGetResponseBuilder} to build response
     * @return {@link ResponseEntity} with {@link Representation} of {@link Customer}
     */
    @Transactional
    @RequestMapping(method = { RequestMethod.GET, RequestMethod.HEAD })
    public ResponseEntity<Representation> get(@PathVariable("id") Integer id, HalResponseBuilder builder) {
        Customer customer = customerRepository.findOne(id);
        return builder.convert(customer, new CustomerRepresentationWriter()).etag(customer.getVersion())
                .lastModified(customer.getUpdated()).build();
    }

    /**
     * Modify a {@link Customer}
     * 
     * @param customer {@link Customer} to update
     * @param builder {@link PutResponseBuilder} to build response
     * @return {@link ResponseEntity} with null body and HTTP status 204 
     */
    @RequestMapping(method = RequestMethod.PUT)
    public ResponseEntity<Void> put(@RequestBody Customer customer, PutResponseBuilder<Customer> builder) {
        Customer saved = customerRepository.save(customer);
        return builder.etag(saved.getVersion()).lastModified(saved.getUpdated()).build();
    }

    /**
     * Delete a {@link Customer} 
     * by identifier in the 
     * URI template
     * 
     * @param id identifier of the {@link Customer} to delete
     * @param builder {@link DeleteResponseBuilder} to build response
     * @return {@link ResponseEntity} with null body and HTTP status 204 
     */
    @RequestMapping(method = RequestMethod.DELETE)
    public ResponseEntity<Void> delete(@PathVariable("id") Integer id, DeleteResponseBuilder builder) {
        customerRepository.delete(id);
        return builder.build();
    }

}