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84 Chapter 9. Persistence Tutorial
select article_id
from authors, author_article_map
where authors.author_id = author_article_map.author_id
and lower(last_name) like :lastName || ’%’
} map {
authorID = authors.author_id;
}
}
query retrieveSelectedArticles {
BigDecimal articleID;
String title;
do {
select article_id, title from articles
} map {
articleID = articles.article_id;
title = articles.title;
}
}
Next, simply retrieve one query and add the other query as part of the filter, as follows (remove the \
and make it all one line):
Session session = SessionManager.getSession();
DataQuery query = \
session.retrieveQuery("tutorial.retrieveSelectedArticles");
Filter filter = query.addInSubqueryFilter("articleID", \
"tutorial.retrieveAuthorsWithParam");
// we have to set the value for "lastName" since it is a bind variable
// in the subquery we added.
filter.set("lastName", "b");
System.out.println\
("The following articles have at least one author whose " +
"last name starts with ’b’");
while (query.next()) {
System.out.println(query.get("title"));
}
The code above will actually execute the following SQL:
select article_id, title from articles
where article_id in (select article_id
from authors, author_article_map
where authors.author_id = \
author_article_map.author_id
and lower(last_name) like ? || ’%’
with ? = "b"
Note
While there are other, possibly better ways to obtain the same result, this example is used to demon-
strate how the feature works, not as an authoritative example of writing queries.
- Red Hat Web Application 1
- Framework 6.1 1
- WAF Developer Guide 1
- Table of Contents 3
- 2. Document Conventions 7
- Mail backupfiles mail reports 8
- first term 11
- I. WAF Concepts 13
- Chapter 1 15
- WAF Overview 15
- 1.1. General Architecture 16
- 1.2. Features 17
- 1.2.2. Services 18
- • Domain logic 19
- 1.3. Applications 20
- Chapter 1. WAF Overview 7 21
- 8 Chapter 1. WAF Overview 22
- Chapter 2 23
- WAF Component: Persistence 23
- BaseServlet 24
- Chapter 3 25
- WAF Component: Kernel 25
- 3.4. Kernel Resources 26
- Chapter 4 27
- WAF Component: Services 27
- 4.3. Formbuilder Service 28
- 4.4. Globalization Service 29
- 4.5. Mail Service 30
- 4.6. Messaging Service 30
- 4.7. Notification Service 31
- 4.8. Portal Service 31
- 4.9. Search Service 31
- 4.10. Workflow Service 32
- 4.11. Versioning Service 32
- Chapter 5 33
- WAF Component: Presentation 33
- 5.2. CSS and XSLT 34
- 5.2.2. WAF Templating Package 35
- • ::application:: 36
- • ::url:: - (admin, index) 36
- • ::locale:: - (en_US, en) 36
- Available Patterns 37
- • /index.jsp 38
- • / - { "index" } 38
- 5.3. JavaServer Pages (JSP) 39
- 5.4.1. Working With Bebop 40
- Page on each request 43
- /define:radioGroup 44
- Chapter 6 45
- WAF Component: Web 45
- 6.3. Dispatcher 46
- II. Equipping Developers 47
- Chapter 7 49
- Developing with WAF 49
- 7.3. Developer Support 50
- /ds/ on your 51
- 7.4.1. Installing Eclipse 52
- • $RESIN_HOME/lib/resin.jar 53
- • Connect Tab 56
- • Source Tab 56
- • Common Tab 56
- 7.5.1. Log4J 57
- 7.5.4. Custom Appenders 61
- Chapter 8 63
- 8.4. Build Tools 64
- 8.6. Persistent Object Types 65
- 8.7. Java Domain Objects 66
- 8.9. Creating a Web Interface 72
- Chapter 9 77
- Persistence Tutorial 77
- 9.3. Associations 84
- 9.3.2. Composite Associations 85
- 9.3.3. Role References 86
- 9.3.4. Link Attributes 86
- 9.4. Named SQL Events 88
- 9.4.2. Data Operations 90
- 9.5.1. Filtering 94
- 9.5.2. Ordering 99
- 9.5.3. Binding Parameters 100
- 9.6. Common Mistakes 102
- 9.6.5. Join Paths 103
- 9.6.6. Dynamic DDL Generation 103
- 9.7. Transaction Management 104
- 9.8. Link Attributes 106
- 9.8.2. Link Attributes API 107
- 9.9. Dynamic Object Types 110
- 9.9.2. Dynamic Associations 111
- • For each attribute: 113
- Chapter 10 117
- Kernel Tutorial 117
- 10.1.2. Revoking Access 118
- 10.1.3. Basic Access Check 118
- 10.1.4. Allowed Targets Check 119
- 10.2. Domain Objects Tutorial 120
- DomainObject or its 122
- 10.2.2. Conventions 129
- 10.2.3. Examples 129
- 10.3. Security Service FAQ 132
- • Replace certain modules 136
- Chapter 11 137
- Services Tutorials 137
- 11.1.2. Classes 139
- 11.2.2. Deleting a Category 142
- 11.3. Notification Tutorial 146
- 11.3.4. Email Alerts 148
- 11.4. Workflow Tutorial 149
- 11.5. Versioning Tutorial 152
- 11.5.2. Fully versioned types 153
- 11.5.3. Recoverable types 154
- 11.5.5. PDL Syntax 155
- 11.6. Search Tutorial 160
- • QueryComponent.java 164
- • BaseQueryComponent.java 164
- • ResultsPane.java 164
- • FilterComponent.java 164
- Chapter 12 167
- Presentation (Bebop) Tutorial 167
- 12.3. Site-Wide Master Pages 169
- 12.4. Varying a Shared Layout 172
- 12.6. UI Tutorial 174
- Chapter 13 179
- Web Applications Tutorial 179
- 13.4. Accessing Resources 181
- 13.5. Globalization and Bebop 183
- 13.6. Localizing Stylesheets 184
- 13.7. Sending Mail Messages 184
- Chapter 14 187
- References 187
- 174 Chapter 14. References 188
- III. Appendixes 189
- Appendix A 191
- Bebop Tag Library Reference 191
- Appendix B 195
- PL/SQL Standards 195
- B.3. Coding Style 197
- B.4.3. Naming primary keys 198
- B.4.5. Upgrade Scripts 199
- - new-version-name .sql 200
- Appendix C 201
- Java Standards 201
- Appendix D 203
- PDL Syntax 203
- 190 Appendix D. PDL Syntax 204
- D.2. PDL Reserved Words 205
- D.2.2. PDL Attribute Types 208
- Appendix D. PDL Syntax 195 209
- 196 Appendix D. PDL Syntax 210
- Appendix D. PDL Syntax 197 211
- 198 Appendix D. PDL Syntax 212
- Appendix D. PDL Syntax 199 213
- 200 Appendix D. PDL Syntax 214
- Appendix D. PDL Syntax 201 215
- 202 Appendix D. PDL Syntax 216
- Persistence Glossary 217
- Persistence Glossary 207 221
- UML Class 221
- 208 Persistence Glossary 222
- Colophon 229
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