Addressbook/src/org/mxchange/addressbook/database/frontend/contact/ContactDatabaseFrontend.java

   1 /*
   2  * Copyright (C) 2015 Roland Haeder
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (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 General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 package org.mxchange.addressbook.database.frontend.contact;
  18
  19 import java.io.IOException;
  20 import java.util.Iterator;
  21 import java.util.List;
  22 import org.mxchange.addressbook.exceptions.BadTokenException;
  23 import org.mxchange.addressbook.contact.Contact;
  24 import org.mxchange.addressbook.database.backend.csv.CsvBackend;
  25 import org.mxchange.addressbook.database.frontend.BaseDatabaseFrontend;
  26 import org.mxchange.addressbook.database.storage.Storeable;
  27 import org.mxchange.addressbook.manager.contact.ContactManager;
  28
  29 /**
  30  * Stores and retrieves Contact instances
  31  *
  32  * @author Roland Haeder
  33  */
  34 public class ContactDatabaseFrontend extends BaseDatabaseFrontend implements ContactWrapper {
  35
  36         /**
  37          * Constructor which accepts a contact manager
  38          *
  39          * @param manager
  40          */
  41         public ContactDatabaseFrontend (final ContactManager manager) {
  42                 // Call own constructor
  43                 this();
  44
  45                 // Set contact manager
  46                 this.setContactManager(manager);
  47         }
  48
  49         /**
  50          * Basic constrcutor
  51          */
  52         protected ContactDatabaseFrontend () {
  53                 super();
  54
  55                 // Set "table" name
  56                 this.setTableName("contacts");
  57
  58                 // Initalize backend
  59                 this.initBackend();
  60         }
  61
  62         /**
  63          * Shuts down the database layer
  64          */
  65         @Override
  66         public void doShutdown () {
  67                 // Shutdown backend
  68                 this.getBackend().doShutdown();
  69         }
  70
  71         /**
  72          * Flushes all contact entries to database
  73          */
  74         @Override
  75         public void flushAllContacts () {
  76                 // Get full list
  77                 List<Contact> contacts = this.getContactManager().getList();
  78
  79                 // Get iterator
  80                 Iterator<Contact> iterator = contacts.iterator();
  81
  82                 // Rewind backend
  83                 this.getBackend().rewind();
  84
  85                 // Get all entries
  86                 while (iterator.hasNext()) {
  87                         // Get next entry
  88                         Contact contact = iterator.next();
  89
  90                         try {
  91                                 // Store this entry
  92                                 this.getBackend().store((Storeable) contact);
  93                         } catch (final IOException ex) {
  94                                 // Should not happen?
  95                                 this.getLogger().catching(ex);
  96                                 System.exit(1);
  97                         }
  98                 }
  99         }
 100
 101         /**
 102          * Reads all contacts from database backend and handles them over to the
 103          * contact manager
 104          */
 105         @Override
 106         public void readAllContacts () {
 107                 // Get iterator and case it
 108                 CsvBackend backend = (CsvBackend) this.getBackend();
 109
 110                 // First rewind to beginning
 111                 this.getBackend().rewind();
 112
 113                 // Get backend iterator
 114                 Iterator<Contact> iterator = null;
 115                 try {
 116                         iterator = backend.contactIterator();
 117                 } catch (final BadTokenException ex) {
 118                         this.getLogger().catching(ex);
 119                         System.exit(1);
 120                 }
 121
 122                 // Read all entries
 123                 while (iterator.hasNext()) {
 124                         // Get next entry
 125                         Contact contact = iterator.next();
 126
 127                         // Add contact instance to manager
 128                         this.getContactManager().addContact(contact);
 129                 }
 130         }
 131 }