src/org/mxchange/jshopcore/model/basket/BaseBasket.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.jshopcore.model.basket;
  18
  19 import java.text.MessageFormat;
  20 import java.util.Map;
  21 import javax.ejb.EJB;
  22 import org.mxchange.jcoreeelogger.beans.local.logger.Log;
  23 import org.mxchange.jcoreeelogger.beans.local.logger.LoggerBeanLocal;
  24
  25 /**
  26  * A general basket class
  27  *
  28  * @author Roland Haeder
  29  * @param <T> Any instance that implements AddableBasketItem
  30  */
  31 public abstract class BaseBasket<T extends AddableBasketItem> implements Basket<T> {
  32         /**
  33          * Serial number
  34          */
  35         private static final long serialVersionUID = 782_396_762_230_845_717L;
  36
  37         /**
  38          * Logger instance
  39          */
  40         @EJB
  41         @Log
  42         private LoggerBeanLocal logger;
  43
  44         /**
  45          * Protected constructor with session instance
  46          */
  47         protected BaseBasket () {
  48                 // Trace message
  49                 this.getLogger().logTrace("CALLED!"); //NOI18N
  50         }
  51
  52         @Override
  53         public void init () {
  54                 // Trace message
  55                 this.getLogger().logTrace("CALLED!"); //NOI18N
  56         }
  57
  58         @Override
  59         @SuppressWarnings ("unchecked")
  60         public void addItem (final T item) {
  61                 // Trace call
  62                 this.getLogger().logTrace(MessageFormat.format("item={0} - CALLED!", item)); //NOI18N
  63
  64                 // item must not be null
  65                 if (null == item) {
  66                         // Then abort here
  67                         throw new NullPointerException("item is null"); //NOI18N
  68                 } else if (this.isAdded(item)) {
  69                         // Already been added
  70                         throw new IllegalArgumentException("item has already been added. Did you miss to call isAdded()?"); //NOI18N
  71                 }
  72
  73                 // Add item to database
  74                 // TODO: ((BasketFrontend) this.getFrontend()).addItem(item, this.getSessionId());
  75
  76                 // Trace call
  77                 this.getLogger().logTrace("EXIT!"); //NOI18N
  78         }
  79
  80         @Override
  81         public boolean isEmpty () {
  82                 // Deligate call to frontend
  83                 // TODO: return ((BasketFrontend) this.getFrontend()).isEmpty();
  84                 throw new UnsupportedOperationException("Not yet implmeneted.");
  85         }
  86
  87         @Override
  88         @SuppressWarnings("unchecked")
  89         public Map<Long, T> getAll () {
  90                 // Trace message
  91                 this.getLogger().logTrace("CALLED!"); //NOI18N
  92
  93                 // Init map
  94                 // TODO: Map<Long, T> map = ((BasketFrontend) this.getFrontend()).getAll();
  95                 Map<Long, T> map = null;
  96
  97                 // Trace message
  98                 this.getLogger().logTrace("map=" + map); //NOI18N
  99
 100                 // Return it
 101                 return map;
 102         }
 103
 104         @Override
 105         public AddableBasketItem getLast () {
 106                 // Deligate to frontend
 107                 // TODO: return ((BasketFrontend) this.getFrontend()).getLast();
 108                 throw new UnsupportedOperationException("Not yet implmeneted.");
 109         }
 110
 111         @Override
 112         public int getLastNumRows () {
 113                 // Deligate to frontend
 114                 // TODO: return this.getFrontend().getLastNumRows();
 115                 throw new UnsupportedOperationException("Not yet implmeneted.");
 116         }
 117
 118         @Override
 119         public boolean isAdded (final T item) {
 120                 // Trace call
 121                 this.getLogger().logTrace(MessageFormat.format("item={0} - CALLED!", item)); //NOI18N
 122
 123                 // item must not be null
 124                 if (null == item) {
 125                         // Then abort here
 126                         throw new NullPointerException("item is null"); //NOI18N
 127                 }
 128
 129                 // Call map's method
 130                 // TODO: boolean isAdded = ((BasketFrontend) this.getFrontend()).isAdded(item, this.getSessionId());
 131                 boolean isAdded = true;
 132
 133                 // Trace message
 134                 this.getLogger().logTrace(MessageFormat.format("isAdded={0} - EXIT!", isAdded)); //NOI18N
 135
 136                 // Return it
 137                 return isAdded;
 138         }
 139
 140         /**
 141          * Getter for logger
 142          *
 143          * @return Logger instance
 144          */
 145         private LoggerBeanLocal getLogger () {
 146                 return this.logger;
 147         }
 148 }