/*
* This library is free software; you can redistribute it and/or modify it under the terms of
* the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
package com.restfully.shop.services;
import com.restfully.shop.domain.Link;
import com.restfully.shop.domain.Product;
import com.restfully.shop.domain.Products;
import com.restfully.shop.persistence.ProductEntity;
import org.springframework.transaction.annotation.Transactional;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriBuilder;
import javax.ws.rs.core.UriInfo;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
@Transactional
public class ProductResourceBean implements ProductResource
{
private EntityManager em;
@PersistenceContext
public void setEntityManager(EntityManager em)
{
this.em = em;
}
public Response createProduct(Product product, UriInfo uriInfo)
{
ProductEntity entity = new ProductEntity();
domain2entity(entity, product);
em.persist(entity);
em.flush();
System.out.println("Created product " + entity.getId());
UriBuilder builder = uriInfo.getAbsolutePathBuilder();
builder.path(Integer.toString(entity.getId()));
return Response.created(builder.build()).build();
}
public static void domain2entity(ProductEntity entity, Product product)
{
entity.setId(product.getId());
entity.setCost(product.getCost());
entity.setName(product.getName());
}
public static Product entity2domain(ProductEntity entity)
{
Product product = new Product();
product.setId(entity.getId());
product.setCost(entity.getCost());
product.setName(entity.getName());
return product;
}
public Products getProducts(int start,
int size,
String name,
UriInfo uriInfo)
{
UriBuilder builder = uriInfo.getAbsolutePathBuilder();
builder.queryParam("start", "{start}");
builder.queryParam("size", "{size}");
ArrayList<Product> list = new ArrayList<Product>();
ArrayList<Link> links = new ArrayList<Link>();
Query query = null;
if (name != null)
{
query = em.createQuery("select p from Product p where p.name=:name");
query.setParameter("name", name);
}
else
{
query = em.createQuery("select p from Product p");
}
List productEntities = query.setFirstResult(start)
.setMaxResults(size)
.getResultList();
for (Object obj : productEntities)
{
ProductEntity entity = (ProductEntity) obj;
list.add(entity2domain(entity));
}
// next link
// If the size returned is equal then assume there is a next
if (productEntities.size() == size)
{
int next = start + size;
URI nextUri = builder.clone().build(next, size);
Link nextLink = new Link("next", nextUri.toString(), "application/xml");
links.add(nextLink);
}
// previous link
if (start > 0)
{
int previous = start - size;
if (previous < 0) previous = 0;
URI previousUri = builder.clone().build(previous, size);
Link previousLink = new Link("previous", previousUri.toString(), "application/xml");
links.add(previousLink);
}
Products products = new Products();
products.setProducts(list);
products.setLinks(links);
return products;
}
public Product getProduct(int id)
{
ProductEntity product = em.getReference(ProductEntity.class, id);
return entity2domain(product);
}
}