src/java/org/mxchange/jcontactsbusiness/model/employee/JobsCompanyEmployeeSessionBean.java

   1 /*
   2  * Copyright (C) 2017 Roland Häder
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU Affero General Public License as
   6  * published by the Free Software Foundation, either version 3 of the
   7  * License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU Affero General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Affero General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 package org.mxchange.jcontactsbusiness.model.employee;
  18
  19 import java.text.MessageFormat;
  20 import java.util.List;
  21 import javax.ejb.Stateless;
  22 import javax.persistence.NoResultException;
  23 import javax.persistence.Query;
  24 import org.mxchange.jcontactsbusiness.employee.CompanyEmployeeSessionBeanRemote;
  25 import org.mxchange.jcontactsbusiness.exceptions.employee.CompanyEmployeeNotFoundException;
  26 import org.mxchange.jjobs.database.BaseJobsDatabaseBean;
  27
  28 /**
  29  * A stateless bean for general purposes for company employees.
  30  * <p>
  31  * @author Roland Häder<roland@mxchange.org>
  32  */
  33 @Stateless (name = "companyEmployee", description = "A general statless bean for handling company employees")
  34 public class JobsCompanyEmployeeSessionBean extends BaseJobsDatabaseBean implements CompanyEmployeeSessionBeanRemote {
  35
  36         /**
  37          * Serial number
  38          */
  39         private static final long serialVersionUID = 26_458_796_703_761L;
  40
  41         /**
  42          * Default constructor
  43          */
  44         public JobsCompanyEmployeeSessionBean () {
  45                 super();
  46         }
  47
  48         @Override
  49         @SuppressWarnings ("unchecked")
  50         public List<Employee> allCompanyEmployees () {
  51                 // Trace message
  52                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.allCompanyEmployees(): CALLED!", this.getClass().getSimpleName())); //NOI18N
  53
  54                 // Get named query
  55                 final Query query = this.getEntityManager().createNamedQuery("AllCompanyEmployees"); //NOI18N
  56
  57                 // Get list form it
  58                 final List<Employee> employees = query.getResultList();
  59
  60                 // Trace message
  61                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.allCompanyEmployees(): employees.size()={1} - EXIT!", this.getClass().getSimpleName(), employees.size())); //NOI18N
  62
  63                 // Return it
  64                 return employees;
  65         }
  66
  67         @Override
  68         public Employee findCompanyEmployeeById (final Long employeeId) throws CompanyEmployeeNotFoundException {
  69                 // Trace message
  70                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.findCompanyEmployeeById(): employeeId={1} - CALLED!", this.getClass().getSimpleName(), employeeId)); //NOI18N
  71
  72                 // Is the employee id valid?
  73                 if (null == employeeId) {
  74                         // Throw NPE
  75                         throw new NullPointerException("employeeId is null"); //NOI18N
  76                 } else if (employeeId < 1) {
  77                         // Not valid
  78                         throw new IllegalArgumentException(MessageFormat.format("employeeId={0} is not valid", employeeId)); //NOI18N
  79                 }
  80
  81                 // Now get named query
  82                 final Query query = this.getEntityManager().createNamedQuery("SearchCompanyEmployeeById"); //NOI18N
  83
  84                 // Set parameter
  85                 query.setParameter("employeeId", employeeId); //NOI18N
  86
  87                 // Declare instance
  88                 final Employee employee;
  89
  90                 // Try to find a result
  91                 try {
  92                         // Find a single result
  93                         employee = (Employee) query.getSingleResult();
  94
  95                         // Log trace message
  96                         this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.findCompanyEmployeeById: Found employee={1}", this.getClass().getSimpleName(), employee)); //NOI18N
  97                 } catch (final NoResultException ex) {
  98                         // No result found
  99                         throw new CompanyEmployeeNotFoundException(employeeId, ex);
 100                 }
 101
 102                 // Log trace message
 103                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.findCompanyEmployeeById: employee={1} - EXIT!", this.getClass().getSimpleName(), employee)); //NOI18N
 104
 105                 // Return found instance
 106                 return employee;
 107         }
 108
 109 }