1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
/**
* <copyright>
*
* Copyright (c) 2005, 2006, 2007 Springsite BV (The Netherlands) and others
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Martin Taal
* </copyright>
*
* $Id: Tutorial1.java,v 1.12 2007/02/11 21:56:14 mtaal Exp $
*/
package hbtutorial;
import java.io.IOException;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EPackage;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
import org.eclipse.example.library.Book;
import org.eclipse.example.library.BookCategory;
import org.eclipse.example.library.Library;
import org.eclipse.example.library.LibraryFactory;
import org.eclipse.example.library.LibraryPackage;
import org.eclipse.example.library.Writer;
import org.eclipse.emf.teneo.hibernate.HbDataStore;
import org.eclipse.emf.teneo.hibernate.HbHelper;
import org.eclipse.emf.teneo.hibernate.resource.HibernateResource;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
/**
* Quick Start Tutorial
*
* @author <a href="mailto:mtaal@elver.org">Martin Taal</a>
* @version $Revision: 1.12 $
*/
public class Tutorial1 {
/** The main method */
public static void main(String[] args) {
// Create the DataStore.
final String dataStoreName = "LibraryDataStore";
final HbDataStore dataStore = (HbDataStore)HbHelper.INSTANCE.createRegisterDataStore(dataStoreName);
// the name of the database, this database should exist but does not
// need to contain tables
// String dbName = "library";
// To configure Hibernate, supply properties describing the JDBC driver,
// URL, username/password and SQL dialect.
// By default the properties are obtained from the file
// "hibernate.properties" at the classpath root.
//
// Alternatively, you can set the properties programmatically:
//
// Properties hibernateProperties = new Properties();
//
// 1) From a ".properties" file or stream.
// InputStream in = ...
// hibernateProperties.load(in);
//
// 2) or populated manually:
// hibernateProperties.setProperty(Environment.DRIVER,
// "com.mysql.jdbc.Driver");
// hibernateProperties.setProperty(Environment.USER, "root");
// hibernateProperties.setProperty(Environment.URL,
// "jdbc:mysql://127.0.0.1:3306/library" + dbName
// hibernateProperties.setProperty(Environment.PASS, "root");
// hibernateProperties.setProperty(Environment.DIALECT,
// "org.hibernate.dialect.MySQLInnoDBDialect");
//
// dataStore.setHibernateProperties(props);
//
// For more information see <a
// href="http://www.hibernate.org/hib_docs/v3/reference/en/html/session-configuration.html#configuration-programmatic">
// section 3.1 of the Hibernate manual</a>.
// Configure the EPackages used by this DataStore.
dataStore.setEPackages(new EPackage[] { LibraryPackage.eINSTANCE });
// Initialize the DataStore. This sets up the Hibernate mapping and, in
// turn, creates the corresponding tables in the database.
dataStore.initialize();
final SessionFactory sessionFactory = dataStore.getSessionFactory();
{
// Open a new Session and start transaction.
final Session session = sessionFactory.openSession();
session.beginTransaction();
// Create a library.
Library library = LibraryFactory.eINSTANCE.createLibrary();
library.setName("My Library");
// Make it persistent.
session.save(library);
// Create a writer...
Writer writer = LibraryFactory.eINSTANCE.createWriter();
writer.setName("JRR Tolkien");
// ...and one of his books.
Book book = LibraryFactory.eINSTANCE.createBook();
book.setAuthor(writer);
book.setPages(305);
book.setTitle("The Hobbit");
book.setCategory(BookCategory.SCIENCE_FICTION_LITERAL);
// Add the Writer and Book to the Library. They are made
// persistent automatically because the Library is already
// persistent.
library.getWriters().add(writer);
library.getBooks().add(book);
// Commit the changes to the database.
session.getTransaction().commit();
// Close the session. Not necessary if
session.close();
}
{
final Session session = sessionFactory.openSession();
session.beginTransaction();
// Retrieve the Library and its child objects.
// Note that you must use the EClass name in the HQL query.
Query query = session.createQuery("FROM Library");
List libraries = query.list();
Library library = (Library) libraries.get(0);
// Obtain the Writer and Book
Writer writer = (Writer) library.getWriters().get(0);
System.out.println(writer.getName());
Book book = (Book) library.getBooks().get(0);
System.out.println(book.getTitle());
// Verify that the eContainer and references are set correctly.
assert (book.eContainer() == library);
assert (writer.getBooks().get(0) == book);
// Add a new Writer and Book
Writer georgeOrwell = LibraryFactory.eINSTANCE.createWriter();
georgeOrwell.setName("G. Orwell");
// Create a new Book and set the Writer and Library.
Book georgesBook = LibraryFactory.eINSTANCE.createBook();
georgesBook.setPages(250);
georgesBook.setTitle("1984");
georgesBook.setCategory(BookCategory.SCIENCE_FICTION_LITERAL);
georgesBook.setAuthor(georgeOrwell);
library.getBooks().add(georgesBook);
library.getWriters().add(georgeOrwell);
// Commit.
session.getTransaction().commit();
session.close();
}
{
final Session session = sessionFactory.openSession();
session.beginTransaction();
// Retrieve all Books and display their titles.
Query query = session.createQuery("FROM Book");
List books = query.list();
for (Iterator it = books.iterator(); it.hasNext();) {
Book book = (Book) it.next();
System.out.println(book.getTitle());
}
// Retrieve George Orwell's book.
query = session.createQuery("SELECT book FROM Book book, Writer writ WHERE "
+ " book.title='1984' AND book.author=writ AND writ.name='G. Orwell'");
books = query.list();
// Show some results
System.out.println("There are " + books.size() + " in the Library."); // should be 1
System.out.println(books.get(0).getClass().getName());
Book book = (Book) books.get(0);
System.out.println(book.getTitle()); // should be 1984
System.out.println(book.getAuthor().getName()); // should be G. Orwell
// Count the number of books in the library
query = session.createQuery("SELECT count(allbooks) FROM Library lib LEFT JOIN lib.books AS allbooks "
+ " WHERE lib.name='My Library'");
int count = ((Number) query.uniqueResult()).intValue();
// there should be 2 books
System.out.println("There are " + count + " books in the library");
session.getTransaction().commit();
}
try {
String uriStr = "hibernate://?" + HibernateResource.DS_NAME_PARAM + "=" + dataStoreName;
final URI uri = URI.createURI(uriStr);
ResourceSet resourceSet = new ResourceSetImpl();
final Resource res = resourceSet.createResource(uri);
res.load(Collections.EMPTY_MAP);
Iterator it = res.getContents().iterator();
Library libTest;
while (it.hasNext()) {
libTest = (Library) it.next();
System.out.println(libTest.getName());
}
Library libNew = LibraryFactory.eINSTANCE.createLibrary();
libNew.setName("My Second Library");
// create a writer
Writer writerNew = LibraryFactory.eINSTANCE.createWriter();
writerNew.setName("I. Asimov");
// and one of his books
Book bookNew = LibraryFactory.eINSTANCE.createBook();
bookNew.setAuthor(writerNew);
bookNew.setPages(305);
bookNew.setTitle("Foundation and Empire");
bookNew.setCategory(BookCategory.SCIENCE_FICTION_LITERAL);
// add the writer/book to the library.
libNew.getWriters().add(writerNew);
libNew.getBooks().add(bookNew);
// now add the top-level object to the resource
res.getContents().add(libNew);
res.save(null);
} catch (IOException e) {
throw new Error("IOException", e);
}
}
}
|
