/**
* Copyright (C) 2012 KRM Associates, Inc. healtheme@krminc.com
*
* 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.krminc.phr.api.service;
import com.krminc.phr.api.converter.HealthRecordConverter;
import com.krminc.phr.api.converter.HealthRecordsConverter;
import com.krminc.phr.dao.PersistenceService;
import com.krminc.phr.domain.HealthRecord;
import com.krminc.phr.domain.User;
import com.sun.jersey.api.core.ResourceContext;
import java.util.Collection;
import javax.persistence.EntityManager;
import javax.ws.rs.Path;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Produces;
import javax.ws.rs.Consumes;
import javax.ws.rs.PathParam;
import javax.ws.rs.QueryParam;
import javax.ws.rs.DefaultValue;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.UriInfo;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.WebApplicationException;
/**
* Heath Records API RESTful resource class and mapping accessible via the user branch of the API.
*
* @author Daniel Shaw (dshaw.com)
*/
public class UserHealthRecordsResource {
final Logger logger = LoggerFactory.getLogger(UserHealthRecordsResource.class);
@Context
protected UriInfo uriInfo;
@Context
protected ResourceContext resourceContext;
@Context
protected transient HttpServletRequest servletRequest;
protected Long userId;
public UserHealthRecordsResource() {
}
public void setUserId(Long userId) {
this.userId = userId;
}
/**
* Get method for retrieving a collection of HealthRecord instance in XML format.
*
* @return an instance of HealthRecordsConverter
*/
@GET
@Produces({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
public HealthRecordsConverter get(
@QueryParam("start") @DefaultValue("0") int start,
@QueryParam("max") @DefaultValue("10") int max
) {
PersistenceService persistenceSvc = PersistenceService.getInstance();
try {
persistenceSvc.beginTx();
return new HealthRecordsConverter(getEntities(start, max), uriInfo.getAbsolutePath(), Api.DEFAULT_EXPAND_LEVEL);
} finally {
persistenceSvc.commitTx();
persistenceSvc.close();
}
}
/**
* Post method for creating an instance of HealthRecord using XML as the input format.
*
* @param data an HealthRecordConverter entity that is deserialized from an XML stream
* @return an instance of HealthRecordConverter
*/
@POST
@Consumes({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
public Response post(HealthRecordConverter data) {
//check healthrecord is genuine
try {
Long session = new Long(servletRequest.getSession().getAttribute("healthRecordId").toString());
if (session!=null) {
data.setHealthRecordId(session);
} else {
throw new WebApplicationException(Response.Status.FORBIDDEN);
}
}
catch(NullPointerException ex) {
throw new WebApplicationException(Response.Status.FORBIDDEN);
}
PersistenceService persistenceSvc = PersistenceService.getInstance();
try {
persistenceSvc.beginTx();
EntityManager em = persistenceSvc.getEntityManager();
HealthRecord entity = data.resolveEntity(em);
createEntity(data.resolveEntity(em));
persistenceSvc.commitTx();
return Response.created(uriInfo.getAbsolutePath().resolve(entity.getHealthRecordId() + "/")).build();
} finally {
persistenceSvc.close();
}
}
/**
* Returns a dynamic instance of HealthRecordResource used for entity navigation.
*
* @return an instance of HealthRecordResource
*/
@Path("{healthRecordId}/")
public UserHealthRecordResource getHealthRecordResource(@PathParam("healthRecordId") Long healthRecordId) {
UserHealthRecordResource resource = resourceContext.getResource(UserHealthRecordResource.class);
resource.setId(healthRecordId);
return resource;
}
/**
* Returns all the entities associated with this resource.
*
* @return a collection of HealthRecord instances
*/
protected Collection<HealthRecord> getEntities(int start, int max) {
EntityManager em = PersistenceService.getInstance().getEntityManager();
return em.createNamedQuery("HealthRecord.findByUserId")
.setParameter("userId", userId)
.setFirstResult(start)
.setMaxResults(max)
.getResultList();
}
/**
* Persist the given entity.
*
* @param entity the entity to persist
*/
protected void createEntity(HealthRecord entity) {
entity.setHealthRecordId(null);
EntityManager em = PersistenceService.getInstance().getEntityManager();
em.persist(entity);
User user = entity.getUser();
if (user != null) {
user.getHealthRecords().add(entity);
}
}
}