/**
* 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.vitals.service;
import com.krminc.phr.api.service.Api;
import com.krminc.phr.api.vitals.converter.WeightConverter;
import com.krminc.phr.api.vitals.converter.WeightsConverter;
import com.krminc.phr.dao.PersistenceService;
import com.krminc.phr.domain.vitals.Weight;
import com.sun.jersey.api.core.ResourceContext;
import java.util.Collection;
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.UriInfo;
import javax.persistence.EntityManager;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import oracle.toplink.essentials.config.CascadePolicy;
import oracle.toplink.essentials.config.HintValues;
import oracle.toplink.essentials.config.TopLinkQueryHints;
import org.codehaus.jettison.json.JSONException;
import org.codehaus.jettison.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.servlet.http.HttpServletRequest;
/**
* Weights API RESTful resource class and mapping.
*
* @author cmccall
* @author Daniel Shaw (dshaw.com)
*/
public class WeightsResource {
final Logger logger = LoggerFactory.getLogger(WeightsResource.class);
@Context
protected UriInfo uriInfo;
@Context
protected ResourceContext resourceContext;
@Context
protected transient HttpServletRequest servletRequest;
protected Long healthRecordId;
public WeightsResource() {
}
public void setHealthRecordId(Long healthRecordId) {
this.healthRecordId = healthRecordId;
}
/**
* Get method for retrieving a collection of Weight instance in XML format.
*
* @return an instance of WeightsConverter
*/
@GET
@Produces( { MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML } )
public WeightsConverter get(
@QueryParam("start") @DefaultValue("0") int start,
@QueryParam("max") @DefaultValue("10") int max,
@QueryParam("source") @DefaultValue("self") String source,
@QueryParam("orderBy") @DefaultValue("dateadded") String orderBy,
@QueryParam("desc") @DefaultValue("1") int desc)
{
PersistenceService persistenceSvc = PersistenceService.getInstance();
try {
persistenceSvc.beginTx();
return new WeightsConverter(
getEntities(start, max, source, orderBy, desc),
uriInfo.getAbsolutePath(),
Api.DEFAULT_EXPAND_LEVEL
);
} finally {
persistenceSvc.commitTx();
persistenceSvc.close();
}
}
/**
* Post method for creating an instance of Weight using XML as the input format.
*
* @param data an WeightConverter entity that is deserialized from an XML stream
* @return an instance of WeightConverter
*/
@POST
@Consumes( { MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML } )
public Response post(WeightConverter 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 {
if (data.hasError) {
throw new WebApplicationException(Response.Status.PRECONDITION_FAILED);
}
persistenceSvc.beginTx();
EntityManager em = persistenceSvc.getEntityManager();
Weight entity = data.resolveEntity(em);
createEntity(data.resolveEntity(em));
persistenceSvc.commitTx();
return Response.created(uriInfo.getAbsolutePath().resolve(entity.getWeightId() + "/")).build();
} finally {
persistenceSvc.close();
}
}
/**
* Returns a dynamic instance of WeightResource used for entity navigation.
*
* @param id weightId
* @return an instance of WeightResource
*/
@Path("{weightId: \\d+}/")
public WeightResource getWeightResource(@PathParam("weightId") Long id) {
WeightResource resource = resourceContext.getResource(WeightResource.class);
resource.setId(id);
return resource;
}
@Path("count/")
@GET
@Produces({MediaType.APPLICATION_JSON})
public JSONObject getCount(
@QueryParam("source")
@DefaultValue("self")
String source){
EntityManager em = PersistenceService.getInstance().getEntityManager();
Long result = 0L;
result = (Long) em.createNamedQuery("Weight.countByHealthRecordId")
.setParameter("healthRecordId" , this.healthRecordId)
.getSingleResult();
JSONObject jsonResult = new JSONObject();
try {
jsonResult.put("count", result);
}
catch (JSONException ex) {
throw new WebApplicationException(Response.Status.NOT_FOUND);
}
return jsonResult;
}
/**
* Returns all the entities associated with this resource.
*
* @return a collection of Weight instances
*/
protected Collection<Weight> getEntities(int start, int max, String source, String orderBy, int desc) {
EntityManager em = PersistenceService.getInstance().getEntityManager();
//build query based on source.
// source:
// self -- produces a WHERE clause of source_id = 1 (default)
// all -- produces no WHERE clause
// clinical -- clinical and all other strings produce a WHERE clause of source_id != 1
// orderBy :
// date
// addeddate (default)
// desc:
// 0 -- ascending (default)
// >0 -- descending
if(start<0) start=0;
if(max<1) max=1;
if(max>100) max=100;
StringBuilder query = new StringBuilder("SELECT e FROM Weight e WHERE e.healthRecordId = :healthRecordId");
if (orderBy.equalsIgnoreCase("value")) {
query.append(" ORDER BY e.weight");
}else if(orderBy.equalsIgnoreCase("observeddate")){
query.append(" ORDER BY e.observedDate");
} else {
query.append(" ORDER BY e.dateAdded");
}
if (desc>0) {
query.append(" DESC");
} else {
query.append(" ASC");
}
return em.createQuery(query.toString())
.setParameter("healthRecordId", healthRecordId)
.setHint(TopLinkQueryHints.REFRESH, HintValues.TRUE)
.setHint(TopLinkQueryHints.REFRESH_CASCADE, CascadePolicy.CascadeAllParts)
.setFirstResult(start)
.setMaxResults(max)
.getResultList();
}
/**
* Persist the given entity.
*
* @param entity the entity to persist
*/
protected void createEntity(Weight entity) {
entity.setWeightId(null);
EntityManager em = PersistenceService.getInstance().getEntityManager();
em.persist(entity);
}
}