src/java/org/mxchange/pizzaapplication/database/frontend/product/PizzaProductDatabaseFrontend.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.database.frontend.product;
  18
  19 import java.sql.SQLException;
  20 import java.text.MessageFormat;
  21 import java.util.Iterator;
  22 import org.mxchange.jcore.criteria.searchable.SearchCriteria;
  23 import org.mxchange.jcore.criteria.searchable.SearchableCritera;
  24 import org.mxchange.jcore.database.frontend.BaseDatabaseFrontend;
  25 import org.mxchange.jcore.database.result.Result;
  26 import org.mxchange.jcore.database.storage.Storeable;
  27 import org.mxchange.jcore.exceptions.BadTokenException;
  28 import org.mxchange.jcore.exceptions.UnsupportedDatabaseBackendException;
  29 import org.mxchange.pizzaapplication.database.product.PizzaProductDatabaseConstants;
  30 import org.mxchange.pizzaapplication.product.Product;
  31
  32 /**
  33  * Stores and retrieves Contact instances
  34  *
  35  * @author Roland Haeder
  36  */
  37 public class PizzaProductDatabaseFrontend extends BaseDatabaseFrontend implements ProductFrontend {
  38
  39         /**
  40          * Default constrcutor
  41          */
  42         public PizzaProductDatabaseFrontend () {
  43                 // Trace message
  44                 this.getLogger().trace("CALLED!"); //NOI18N
  45
  46                 // Set "table" name
  47                 this.setTableName("products"); //NOI18N
  48
  49                 try {
  50                         // Initalize backend
  51                         this.initBackend();
  52                 } catch (final UnsupportedDatabaseBackendException | SQLException ex) {
  53                         // Abort program
  54                         this.abortProgramWithException(ex);
  55                 }
  56         }
  57
  58         /**
  59          * Shuts down the database layer
  60          */
  61         @Override
  62         public void doShutdown () {
  63                 // Trace message
  64                 this.getLogger().trace("CALLED!"); //NOI18N
  65
  66                 // Shutdown backend
  67                 this.getBackend().doShutdown();
  68
  69                 // Trace message
  70                 this.getLogger().trace("EXIT!"); //NOI18N
  71         }
  72
  73         /**
  74          * An iterator on all products
  75          *
  76          * @return Iterator on all products
  77          */
  78         @Override
  79         @SuppressWarnings ("unchecked")
  80         public Iterator<Product> getProducts () {
  81                 // Trace message
  82                 this.getLogger().trace("CALLED!"); //NOI18N
  83
  84                 // Instance search criteria
  85                 SearchableCritera critera = new SearchCriteria();
  86
  87                 // Add criteria
  88                 critera.addCriteria(PizzaProductDatabaseConstants.COLUMN_AVAILABLE, true);
  89
  90                 // Run the query
  91                 Result<? extends Storeable> result = this.getBackend().doSelectByCriteria(critera);
  92
  93                 // Debug message
  94                 this.getLogger().debug(MessageFormat.format("result={0}", result)); //NOI18N
  95
  96                 // Get iterator
  97                 Iterator<?> iterator = result.iterator();
  98
  99                 // Trace message
 100                 this.getLogger().trace(MessageFormat.format("iterator={0} - EXIT!", iterator)); //NOI18N
 101
 102                 // Get iterator and return it
 103                 return (Iterator<Product>) iterator;
 104         }
 105
 106         /**
 107          * Parses given line from database backend into a Storeable instance. Please
 108          * note that not all backends need this.
 109          *
 110          * @param line Line from database backend
 111          * @return A Storeable instance
 112          */
 113         @Override
 114         public Storeable parseLineToStoreable (final String line) throws BadTokenException {
 115                 // Trace message
 116                 this.getLogger().trace(MessageFormat.format("line={0} - CALLED!", line)); //NOI18N
 117
 118                 // Call inner method
 119                 Product product = this.parseLineToProduct(line);
 120
 121                 // Debug message
 122                 this.getLogger().trace(MessageFormat.format("product={0} - EXIT!", product)); //NOI18N
 123
 124                 // Return it
 125                 return product;
 126         }
 127
 128         /**
 129          * Parses given line to a Product instance
 130          *
 131          * @param line
 132          * @return A Product instance from given line
 133          */
 134         private Product parseLineToProduct (final String line) {
 135                 throw new UnsupportedOperationException(MessageFormat.format("Not supported yet: line={0}", line)); //NOI18N
 136         }
 137 }