/*
* Copyright 2011 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 com.jayway.demo.library.rest.resources.hateoas;
import com.jayway.demo.library.domain.Book;
import com.jayway.demo.library.domain.BookRepository;
import com.jayway.demo.library.domain.Customer;
import com.jayway.demo.library.domain.CustomerRepository;
import com.jayway.demo.library.domain.factory.RepositoryFactory;
import com.jayway.demo.library.rest.dto.LoanDto;
import com.jayway.jaxrs.hateoas.Linkable;
import com.jayway.jaxrs.hateoas.core.HateoasResponse;
import javax.ws.rs.*;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;
import java.util.Collection;
import static com.jayway.jaxrs.hateoas.core.HateoasResponse.HateoasResponseBuilder.makeLink;
@Path("/library/loans")
public class LoanResource {
private BookRepository bookRepository;
private CustomerRepository customerRepository;
public LoanResource() {
bookRepository = RepositoryFactory.getBookRepository();
customerRepository = RepositoryFactory.getCustomerRepository();
}
@POST
@Consumes("application/vnd.demo.library.loan+json")
@Produces("application/vnd.demo.library.loan+json")
@Linkable(value = LinkableIds.LOAN_NEW_ID, templateClass = LoanDto.class)
public Response newLoan(LoanDto loan) {
Book book = bookRepository.getBookById(loan.getBookId());
if (book.isBorrowed()) {
return Response.status(Status.CONFLICT).build();
}
Customer customer = customerRepository.getById(loan.getCustomerId());
book.setBorrowedBy(customer);
return HateoasResponse
.created(LinkableIds.LOAN_DETAILS_ID, book.getId())
.entity(loan)
.selfLink(LinkableIds.LOAN_DETAILS_ID, book.getId())
.link(LinkableIds.BOOK_DETAILS_ID, Rels.BOOK, book.getId())
.link(LinkableIds.CUSTOMER_DETAILS_ID, Rels.CUSTOMER, customer.getId())
.selfLink(LinkableIds.LOAN_RETURN_ID, book.getId()).build();
}
@GET
@Produces("application/vnd.demo.library.list.loan+json")
@Linkable(LinkableIds.LOANS_LIST_ID)
public Response getLoans() {
Collection<Book> books = bookRepository.getLoans();
Collection<LoanDto> dtos = LoanDto.fromBeanCollection(books);
return HateoasResponse.ok(dtos).selfLink(LinkableIds.LOANS_LIST_ID)
.selfLink(LinkableIds.LOAN_NEW_ID)
.selfEach(LinkableIds.LOAN_DETAILS_ID, "bookId").build();
}
@GET
@Path("/{id}")
@Produces("application/vnd.demo.library.loan+json")
@Linkable(LinkableIds.LOAN_DETAILS_ID)
public Response getLoan(@PathParam("id") Integer id) {
Book book = bookRepository.getBookById(id);
if (book == null || !book.isBorrowed()) {
return Response.status(Status.NOT_FOUND).build();
}
Customer customer = book.getBorrowedBy();
return HateoasResponse.ok(new LoanDto(customer.getId(), book.getId()))
.selfLink(LinkableIds.LOAN_DETAILS_ID, book.getId())
.link(LinkableIds.BOOK_DETAILS_ID, Rels.BOOK, book.getId())
.link(LinkableIds.CUSTOMER_DETAILS_ID, Rels.CUSTOMER, customer.getId())
.selfLink(LinkableIds.LOAN_RETURN_ID, id).build();
}
@DELETE
@Path("/{id}")
@Linkable(LinkableIds.LOAN_RETURN_ID)
public Response returnLoan(@PathParam("id") Integer id) {
Book book = bookRepository.getBookById(id);
book.returned();
return HateoasResponse.ok()
.location(makeLink(LinkableIds.LOANS_LIST_ID, Rels.LOANS)).build();
}
}