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