org.datahack.parkingdb.api.ParkingZoneFacadeREST.java Source code

Introduction

Here is the source code for org.datahack.parkingdb.api.ParkingZoneFacadeREST.java

Source

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

package org.datahack.parkingdb.api;

import com.google.common.collect.Iterables;
import java.util.ArrayList;
import java.util.List;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.TypedQuery;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import org.datahack.parkingdb.ParkingZone;
import org.datahack.parkingdb.ParkingZone_;

/**
 *
 * @author djabry
 */
@Stateless
@Path("parkingzone")
public class ParkingZoneFacadeREST extends AbstractFacade<ParkingZone> {
    @PersistenceContext(unitName = "PARKING_PU")
    private EntityManager em;//= ParkingDBUtils.getEntityManager();

    public ParkingZoneFacadeREST() {
        super(ParkingZone.class);
    }

    //    @POST
    //    @Override
    //    @Consumes({"application/json", "application/xml"})
    //    public void create(ParkingZone entity) {
    //        super.create(entity);
    //    }
    //
    //    @PUT
    //    @Path("{id}")
    //    @Consumes({"application/json", "application/xml"})
    //    public void edit(@PathParam("id") Integer id, ParkingZone entity) {
    //        super.edit(entity);
    //    }
    //
    //    @DELETE
    //    @Path("{id}")
    //    public void remove(@PathParam("id") Integer id) {
    //        super.remove(super.find(id));
    //    }

    @GET
    @Path("{id}")
    @Produces({ "application/json" })
    public ParkingZone find(@PathParam("id") Integer id) {
        return super.find(id);
    }

    @GET
    @Produces({ "application/json" })
    public List<ParkingZone> find(@QueryParam("minLat") Double minLat, @QueryParam("minLon") Double minLon,
            @QueryParam("maxLat") Double maxLat, @QueryParam("maxLon") Double maxLon) {

        CriteriaBuilder cb = this.getEntityManager().getCriteriaBuilder();

        CriteriaQuery<ParkingZone> q = cb.createQuery(ParkingZone.class);
        Root<ParkingZone> pz = q.from(ParkingZone.class);

        List<Predicate> predicates = new ArrayList();

        if (minLat != null) {
            predicates.add(cb.ge(pz.get(ParkingZone_.latitude), minLat));
        }

        if (minLon != null) {
            predicates.add(cb.ge(pz.get(ParkingZone_.longitude), minLon));
        }

        if (maxLat != null) {
            predicates.add(cb.le(pz.get(ParkingZone_.latitude), maxLat));
        }

        if (maxLon != null) {
            predicates.add(cb.le(pz.get(ParkingZone_.longitude), maxLon));
        }

        Predicate[] arr = Iterables.toArray(predicates, Predicate.class);
        q = q.where(arr);

        TypedQuery<ParkingZone> pzQuery = em.createQuery(q);

        return pzQuery.getResultList();

    }

    @GET
    @Path("{from}/{to}")
    @Produces({ "application/json" })
    public List<ParkingZone> findRange(@PathParam("from") Integer from, @PathParam("to") Integer to) {
        return super.findRange(new int[] { from, to });
    }

    @GET
    @Path("count")
    @Produces("text/plain")
    public String countREST() {
        return String.valueOf(super.count());
    }

    @Override
    protected EntityManager getEntityManager() {
        return em;
    }

}