ObjectDB Database Search

( no persistence unit ). Keep the test as simple as possible - remove unnecessary code (but keep it complete

code and documentation distributed under this Agreement, and b) in the case of each subsequent ... , if any, and such derivative works, in source code and object code form. b) Subject to the terms ... the Contribution of such Contributor, if any, in source code and object code form. This patent

code needed. Notice that query results must always be specified explicitly - JPQL does not support ... cell contains the capital city name ( c.capital.name ). The following code demonstrates running ... = capitalName;   } } The following code demonstrates running this query: String queryStr

ObjectDB Enhancer is a post compilation tool that improves performance by modifying the byte code ... not need to be enhanced. Enhancement improves efficiency in three ways: Enhanced code enables ... (as explained in  chapter 3 ). This is done by adding special code to enhanced classes

per database) requires specifying a valid activation code using an  element.  Activation codes ... the command line. Every machine requires a specific activation code , but multiple elements can be specified in the same configuration. This way the same configuration file (with multiple activation codes

to software source code , documentation source, and configuration files. "Object" form shall mean any form ... to compiled object code , generated documentation, and conversions to other media types. "Work" shall ... , including but not limited to communication on electronic mailing lists, source code control systems

or implicitly as a result of a cascade operation. Explicit Persist The following code stores ... managed by the EntityManager ) or by commit . Referenced Embedded Objects The following code stores ... that the Address class in the code above is defined as an entity class. In this case, the referenced Address

the following code : CriteriaQuery q = cb. createQuery (Country.class); Root c1 = q. from (Country.class ... a criteria query using the following code : CriteriaQuery q = cb. createQuery (Country.class); Root c = q ... Country c JOIN FETCH c.capital can be built as a criteria query using the following code

named queries instead of dynamic queries may improve code  organization by separating the JPQL query strings from the Java code . It also enforces the use of query  parameters ... the above code ObjectDB will include MyEntity in searching named queries.

of the original database file. For example, backing up a  test.odb  database file using the code ... .getSingleResult(); The code  above, for instance, could create a backup at  c:\backup ... side. For example, in client-server mode the code  above could create the backup file on the server

automatic enhancement ( weaving ) in Tomcat it has to be run with ObjectDB as a Java agent ( javaagent:objectdb.jar). When using GlassFish - on the fly enhancement ( weaving ) is automatically enabled

server and open the database file in ObjectDB Explorer : To enable on the fly enhancement ( weaving ... the server node and select Restart. When using GlassFish - on the fly enhancement ( weaving ) is automatically

. The ability to store ordinary objects in the database directly can simplify the code significantly. Less (and more simple) code to write, debug and test, as well as a much easier learning curve leads

with an EntityManager (represented by em in the following code snippets), which serves as a factory ... . createQuery ("SELECT c FROM Country c", Country.class); In the above code , the same JPQL query

fast - much faster than any other JPA solution. General Highly optimized code (as a result of many ...  from other managed objects. Transparent update - changes are detected automatically. Code

(e.g. in the code above, Object can be replaced by a more specific type). The listener class

the @Transient annotation). Storing an entity object in the database does not store methods or code

, JDOQL and ObjectDB extensions. Setting "JPQL" is useful to enforce portable JPA code by ObjectDB

The configuration element supports renaming packages, classes and fields in ObjectDB databases as a complementary operation to renaming or moving these elements in the IDE during source code refactoring. Only these schema changes are specified in the configuration file. As explained in chapter 2

, supporting community, forums, IDEs support, tools, books, tutorials and sample code . ObjectDB

, cb. isTrue (isInUN), cb. isTrue (isInEU)); In the above  code non Predicate boolean expressions

. Given an EntityManager em , the following code fragment demonstrates the retrieval of an Employee

of the entity class (e.g. Country). That is equivalent to Country.class in Java code . Notice

- start writing more effective database code using Java classes and objects! Try an ObjectDB / JPA

Entity Classes Storing an entity object in the database does not store methods and code

databases when necessary - with exactly the same code .

Copyright (c) 2007, Eclipse Foundation, Inc. and its licensors. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: Redistributions of source code must retain the above copyright notice

of the new source file with the following code : package guest; import javax.persistence.*; import javax ... = (EntityManagerFactory)e.getServletContext().getAttribute("emf"); emf.close(); } } The code above: Invokes

code : package guest; import javax.persistence.*; import javax.servlet.*; @WebListener public class ... ().getAttribute("emf"); emf.close(); } } The code above: Invokes the Enhancer to enhance the entity class

and paste to replace the new source file content with the following code : package guest; import java.io

might look slightly different but the code would be the same). The tutorial is based on using a Maven

the new Spring Controller class. Now replace the content of the new source file with the following code

the new class. Copy and paste the following code into the newly created Point class: package tutorial

to create the new servlet class. Now replace the content of the new source file with the following code

well (dialog boxes and menus might look slightly different but the code would be the same). This tutorial consists of the following steps:

but the code would be the same). The Tutorial Steps This tutorial consists of the following steps:

to replace the new source file content with the following code : package guest; import java.io

) class. Now replace the content of the new source file with the following code : package guest; import

replace the content of the new source file with the following code : package guest; import java.util.List

and menus might look slightly different but the code would be the same). The tutorial is based on using

and paste to replace the new source file content with the following code : package guest; import

to create the class. Copy and paste the following code to the newly created class file: package

In this step we will add code to the Main class (that was generated with the project) in order to store Point objects in the database and then retrieve them from the database. Use copy and paste to replace the content of the Main class with the following content: package tutorial; import javax

replace the content of the new source file with the following code : package guest; import javax.servlet

with other Eclipse versions as well (dialog boxes and menus might look slightly different but the code

but the code would be the same). The Tutorial Steps This tutorial consists of the following steps:

to replace the new source file content with the following code : package guest; import java.io

and paste to replace the new source file content with the following code : package guest; import java.io

This tutorial demonstrates how to create and run a simple JPA application. The demonstrated application uses JPA to store and retrieve simple  Point entity objects, where each  Point has two persistent fields -  x and  y . If you already know JPA - the source code will be straightforward

replace the content of the new source file with the following code : package guest; import java.util