Ejemplo de paginación (Listado de preguntas pendientes) con primefaces

utilizando LazyDataModel, con recarga automática de la página
solicitada.

1.sources/MyHealth/src/ejb/common/CommonFacadeBean.java

@@ -6,21 +6,20 @@ import java.util.List;
 import javax.ejb.Stateless;
 import javax.persistence.EntityManager;
 import javax.persistence.PersistenceContext;
-import javax.persistence.Query;
 import javax.persistence.TypedQuery;
 
-import org.jboss.security.auth.spi.Users.User;
-
 import TO.FamilyDoctorTO;
 import TO.MedicalSpecialtyTO;
 import TO.PatientTO;
 import TO.PrimaryHealthCareCenterTO;
+import TO.QuestionTO;
 import TO.SpecialistDoctorTO;
 import common.Utils;
 import jpa.FamilyDoctorJPA;
 import jpa.MedicalSpecialtyJPA;
 import jpa.PatientJPA;
 import jpa.PrimaryHealthCareCenterJPA;
+import jpa.QuestionJPA;
 import jpa.SpecialistDoctorJPA;
 
 @Stateless
@@ -311,4 +310,24 @@ public class CommonFacadeBean implements CommonFacadeRemote, CommonFacadeLocal {
 		else
 			return null;
 	}
+
+	public QuestionTO getPOJOforQuestionJPA(QuestionJPA qs, int nestedProps) {
+		QuestionTO qsTO = null;
+
+		if (qs != null) {
+			FamilyDoctorJPA fd = null;
+			PatientJPA pat = null;
+			if (nestedProps > 0) {
+				fd = qs.getFamilyDoctor();
+				pat = qs.getPatient();
+			}
+
+			nestedProps--;
+			qsTO = new QuestionTO(qs.getId(), qs.getTitle(), qs.getMessage(), qs.getStatus(), this.getPOJOforPatientJPA(pat, nestedProps),
+					this.getPOJOforFamilyDoctorJPA(fd, nestedProps), qs.getResponse());
+		}
+
+		return qsTO;
+	}
+
 }

1.sources/MyHealth/src/ejb/common/CommonFacadeLocal.java

@@ -1,6 +1,5 @@
 package ejb.common;
 
-import java.util.Collection;
 import java.util.List;
 
 import javax.ejb.Local;
@@ -9,11 +8,13 @@ import TO.FamilyDoctorTO;
 import TO.MedicalSpecialtyTO;
 import TO.PatientTO;
 import TO.PrimaryHealthCareCenterTO;
+import TO.QuestionTO;
 import TO.SpecialistDoctorTO;
 import jpa.FamilyDoctorJPA;
 import jpa.MedicalSpecialtyJPA;
 import jpa.PatientJPA;
 import jpa.PrimaryHealthCareCenterJPA;
+import jpa.QuestionJPA;
 import jpa.SpecialistDoctorJPA;
 
 /**
@@ -70,4 +71,5 @@ public interface CommonFacadeLocal {
 
 	public PatientTO getPOJOforPatientJPA(PatientJPA pat, int nestedProps);
 
+	public QuestionTO getPOJOforQuestionJPA(QuestionJPA qs, int nestedProps);
 }

1.sources/MyHealth/src/ejb/medicalTest/MedicalTestFacadeBean.java

@@ -1,20 +1,21 @@
 package ejb.medicalTest;
 
+import java.util.ArrayList;
 import java.util.Date;
+import java.util.List;
 
 import javax.ejb.EJB;
 import javax.ejb.Stateless;
 import javax.persistence.EntityManager;
 import javax.persistence.PersistenceContext;
+import javax.persistence.TypedQuery;
 
-import TO.FamilyDoctorTO;
 import TO.LoggedUserTO;
 import TO.MedicalSpecialtyTO;
 import TO.MedicalTestTO.MedicalTestType;
-import TO.PatientTO;
+import TO.QuestionTO;
 import common.QuestionStatus;
 import common.UserType;
-import TO.QuestionTO;
 import ejb.common.CommonFacadeLocal;
 import jpa.FamilyDoctorJPA;
 import jpa.PatientJPA;
@@ -34,10 +35,9 @@ import managedbean.common.SessionUtils;
  */
 @Stateless
 public class MedicalTestFacadeBean implements MedicalTestFacadeRemote {
-
 	// Persistence Unit Context
 	@PersistenceContext(unitName = "MyHealth")
-	private EntityManager entman;
+	EntityManager entman;
 
 	@EJB
 	CommonFacadeLocal commonServices;
@@ -77,13 +77,36 @@ public class MedicalTestFacadeBean implements MedicalTestFacadeRemote {
 	public void answerQuestion(String question, String response) {
 	}
 
-	/**
-	 * Recuperar las preguntas sin respuesta para un médico
-	 * 
-	 * @param professionalNumber
-	 */
-	@Override
-	public void listAllPendingQuestions(int professionalNumber) {
+	public List<QuestionTO> listAllPendingQuestions(int familyDoctorId) {
+		return null;
+	}
+
+	public Long getPendingQuestionsCount(int familyDoctorId) {
+		TypedQuery<Long> query = entman.createQuery("SELECT count(1) from QuestionJPA q where q.status=:status and q.familyDoctor.id=:docId", Long.class);
+		query.setParameter("status", QuestionStatus.PENDING);
+		query.setParameter("docId", familyDoctorId);
+
+		return query.getSingleResult();
+	}
+	
+	public List<QuestionTO> listPendingQuestionsPaged(int familyDoctorId, int pageNumber, int pageSize) {
+		TypedQuery<QuestionJPA> query = entman.createQuery("SELECT q from QuestionJPA q where q.status=:status and q.familyDoctor.id=:docId order by q.title", QuestionJPA.class);
+		query.setParameter("status", QuestionStatus.PENDING);
+		query.setParameter("docId", familyDoctorId);
+
+		if (pageSize > 0) {
+			query.setFirstResult(pageNumber * pageSize);
+			query.setMaxResults(pageSize);
+		}
+
+		List<QuestionJPA> allJPA = query.getResultList();
+		List<QuestionTO> pendingQuestions = new ArrayList<QuestionTO>();
+
+		for (QuestionJPA item : allJPA) {
+			pendingQuestions.add(commonServices.getPOJOforQuestionJPA(item, 1));
+		}
+
+		return pendingQuestions;
 	}
 
 	/**

1.sources/MyHealth/src/ejb/medicalTest/MedicalTestFacadeRemote.java

@@ -1,11 +1,13 @@
 package ejb.medicalTest;
 
 import java.util.Date;
+import java.util.List;
 
 import javax.ejb.Remote;
 
 import TO.MedicalSpecialtyTO;
 import TO.MedicalTestTO.MedicalTestType;
+import TO.QuestionTO;
 
 /**
  * Interfaz remota del EJB Definimos los métodos que estarán disponibles para
@@ -42,10 +44,14 @@ public interface MedicalTestFacadeRemote {
 	 * 
 	 * De utilidad para paciente y médico de familia. No para médico especialista.
 	 * 
-	 * @param professionalNumber
+	 * @param familydoctorid
 	 */
-	public void listAllPendingQuestions(int professionalNumber);
+	public List<QuestionTO> listAllPendingQuestions(int familyDoctorId);
 
+	public Long getPendingQuestionsCount(int familyDoctorId);
+	
+	public List<QuestionTO> listPendingQuestionsPaged(int familyDoctorId, int pageNumber, int pageSize);
+	
 	/**
 	 * Recuperar una pregunta por su String
 	 *