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

   1 /*
   2  * Copyright (C) 2020 Free Software Foundation
   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.addressbook.database.BaseAddressbookDatabaseBean;
  25 import org.mxchange.jcontactsbusiness.exceptions.employee.CompanyEmployeeNotFoundException;
  26
  27 /**
  28  * A stateless bean for general purposes for company employees.
  29  * <p>
  30  * @author Roland Häder<roland@mxchange.org>
  31  */
  32 @Stateless (name = "companyEmployee", description = "A general statless bean for handling company employees")
  33 public class AddressbookCompanyEmployeeSessionBean extends BaseAddressbookDatabaseBean implements CompanyEmployeeSessionBeanRemote {
  34
  35         /**
  36          * Serial number
  37          */
  38         private static final long serialVersionUID = 26_458_796_703_761L;
  39
  40         /**
  41          * Default constructor
  42          */
  43         public AddressbookCompanyEmployeeSessionBean () {
  44                 super();
  45         }
  46
  47         @Override
  48         @SuppressWarnings ("unchecked")
  49         public List<Employee> allCompanyEmployees () {
  50                 // Trace message
  51                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.allCompanyEmployees(): CALLED!", this.getClass().getSimpleName())); //NOI18N
  52
  53                 // Get named query
  54                 final Query query = this.getEntityManager().createNamedQuery("AllCompanyEmployees"); //NOI18N
  55
  56                 // Get list form it
  57                 final List<Employee> employees = query.getResultList();
  58
  59                 // Trace message
  60                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.allCompanyEmployees(): employees.size()={1} - EXIT!", this.getClass().getSimpleName(), employees.size())); //NOI18N
  61
  62                 // Return it
  63                 return employees;
  64         }
  65
  66         @Override
  67         public Employee findCompanyEmployeeById (final Long employeeId) throws CompanyEmployeeNotFoundException {
  68                 // Trace message
  69                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.findCompanyEmployeeById(): employeeId={1} - CALLED!", this.getClass().getSimpleName(), employeeId)); //NOI18N
  70
  71                 // Is the employee id valid?
  72                 if (null == employeeId) {
  73                         // Throw NPE
  74                         throw new NullPointerException("employeeId is null"); //NOI18N
  75                 } else if (employeeId < 1) {
  76                         // Not valid
  77                         throw new IllegalArgumentException(MessageFormat.format("employeeId={0} is not valid", employeeId)); //NOI18N
  78                 }
  79
  80                 // Now get named query
  81                 final Query query = this.getEntityManager().createNamedQuery("SearchCompanyEmployeeById"); //NOI18N
  82
  83                 // Set parameter
  84                 query.setParameter("employeeId", employeeId); //NOI18N
  85
  86                 // Declare instance
  87                 final Employee employee;
  88
  89                 // Try to find a result
  90                 try {
  91                         // Find a single result
  92                         employee = (Employee) query.getSingleResult();
  93
  94                         // Log trace message
  95                         this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.findCompanyEmployeeById: Found employee={1}", this.getClass().getSimpleName(), employee)); //NOI18N
  96                 } catch (final NoResultException ex) {
  97                         // No result found
  98                         throw new CompanyEmployeeNotFoundException(employeeId, ex);
  99                 }
 100
 101                 // Log trace message
 102                 this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.findCompanyEmployeeById: employee={1} - EXIT!", this.getClass().getSimpleName(), employee)); //NOI18N
 103
 104                 // Return found instance
 105                 return employee;
 106         }
 107
 108 }