src/java/org/mxchange/pizzaapplication/tags/basket/MiniBasketTag.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.pizzaapplication.tags.basket;
  18
  19 import java.io.IOException;
  20 import java.lang.reflect.InvocationTargetException;
  21 import java.sql.SQLException;
  22 import java.text.MessageFormat;
  23 import javax.servlet.ServletException;
  24 import javax.servlet.jsp.JspException;
  25 import javax.servlet.jsp.tagext.BodyTagSupport;
  26 import org.apache.logging.log4j.LogManager;
  27 import org.apache.logging.log4j.Logger;
  28 import org.mxchange.jcore.exceptions.BadTokenException;
  29 import org.mxchange.jcore.exceptions.CorruptedDatabaseFileException;
  30 import org.mxchange.pizzaapplication.beans.PizzaBean;
  31 import org.mxchange.pizzaapplication.beans.basket.BasketBean;
  32 import org.mxchange.pizzaapplication.item.AddableBasketItem;
  33 import org.mxchange.pizzaapplication.product.Product;
  34
  35 /**
  36  * A basket tag that outputs a small basket and a link to the full basket website.
  37  *
  38  * @author Roland Haeder
  39  */
  40 public class MiniBasketTag extends BodyTagSupport implements BasketTag {
  41         /**
  42          * Serial number
  43          */
  44         private static final long serialVersionUID = 457415727452384L;
  45
  46         /**
  47          * Basket instance
  48          */
  49         private BasketBean basket;
  50
  51         /**
  52          * Logger instance
  53          */
  54         private final Logger LOG;
  55
  56         /**
  57          * Initializer
  58          */
  59         {
  60                 this.LOG = LogManager.getLogger(this);
  61         }
  62
  63         /**
  64          * Outputs a div container with last added item + a link to the basket
  65          * web page.
  66          *
  67          * @return No need to process the body
  68          * @throws JspException If anything happens
  69          */
  70         @Override
  71         public int doStartTag () throws JspException {
  72                 // Trace message
  73                 this.LOG.trace("CALLED!");
  74
  75                 // Init output
  76                 StringBuilder out = new StringBuilder("<div class=\"mini_basket\">\n");
  77
  78                 // basket should not be null
  79                 if (this.getBasket() == null) {
  80                         // Not set
  81                         throw new NullPointerException("basket instance is null");
  82                 }
  83
  84                 try {
  85                         // Some entries found?
  86                         if (this.getBasket().isEmpty()) {
  87                                 // Empty basket
  88                                 out.append("<div class=\"mini_basket_box\">\n");
  89                                 out.append(this.getBasket().getMessageStringFromKey("MiniBasketTag.basket_is_empty")).append("\n");
  90                                 out.append("</div>\n");
  91                         } else {
  92                                 // Get all items
  93                                 AddableBasketItem item = this.getBasket().getLast();
  94
  95                                 // item cannot be null here
  96                                 if (null == item) {
  97                                         // Abort here
  98                                         throw new NullPointerException("item is null");
  99                                 }
 100
 101                                 // Get application bean from session
 102                                 PizzaBean bean = (PizzaBean) this.getBasket().getSession().getAttribute("controller");
 103
 104                                 // Debug log
 105                                 this.LOG.debug("bean=" + bean);
 106
 107                                 // Should not be null
 108                                 if (null == bean) {
 109                                         // Abort here
 110                                         throw new NullPointerException("bean is null");
 111                                 }
 112
 113                                 // Get product instance
 114                                 Product product = bean.getProduct(item);
 115
 116                                 // Debug message
 117                                 this.LOG.debug("product=" + product);
 118
 119                                 // Get last num rows
 120                                 int lastNumRows = this.getBasket().getLastNumRows();
 121
 122                                 // Debug message
 123                                 this.LOG.debug("lastNumRows=" + lastNumRows);
 124
 125                                 // Output all
 126                                 out.append("<div class=\"mini_basket_box\">\n");
 127                                 out.append("  <div class=\"mini_basket_last\">\n");
 128                                 out.append("    ").append(MessageFormat.format(this.getBasket().getMessageStringFromKey("MiniBasketTag.last_item"), product.getTitle()));
 129                                 out.append("  </div>\n");
 130                                 out.append("  <div class=\"mini_basket_more\">\n");
 131                                 out.append("    ").append(MessageFormat.format(this.getBasket().getMessageStringFromKey("MiniBasketTag.additional_items"), (lastNumRows - 1)));
 132                                 out.append("  </div>\n");
 133                                 out.append("  <div class=\"mini_basket_link\">\n");
 134                                 out.append("    <a href=\"").append(this.getBasket().getApplication().getContextPath()).append("/basket.jsp\">").append(this.getBasket().getMessageStringFromKey("MiniBasketTag.to_basket")).append("</a>\n");
 135                                 out.append("  </div>\n");
 136                                 out.append("</div>\n");
 137                         }
 138                 } catch (final ServletException | IOException | SQLException | BadTokenException | CorruptedDatabaseFileException | NoSuchMethodException | IllegalAccessException | InvocationTargetException ex) {
 139                         // Continue to throw
 140                         throw new JspException(ex);
 141                 }
 142
 143                 // Finish output
 144                 out.append("</div>\n");
 145
 146                 try {
 147                         // Get output instance and write it
 148                         this.pageContext.getOut().print(out.toString());
 149                 } catch (final IOException ex) {
 150                         // Continue to throw
 151                         throw new JspException(ex);
 152                 }
 153
 154                 // Trace message
 155                 this.LOG.trace("Returning " + SKIP_BODY + " ... - EXIT!");
 156
 157                 // Don't process any body
 158                 return SKIP_BODY;
 159         }
 160
 161         /**
 162          * @return the basket
 163          */
 164         @Override
 165         public BasketBean getBasket () {
 166                 // Trace message
 167                 //* NOISY-DEBUG: */ this.LOG.trace("basket=" + this.basket + " - EXIT!");
 168
 169                 // Return it
 170                 return this.basket;
 171         }
 172
 173         /**
 174          * @param basket the basket to set
 175          */
 176         @Override
 177         public void setBasket (final BasketBean basket) {
 178                 // Trace message
 179                 //* NOISY-DEBUG: */ this.LOG.trace("basked=" + basket + " - CALLED!");
 180
 181                 // Set it here
 182                 this.basket = basket;
 183         }
 184 }