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Literals in JPQL and Criteria Queries

), a feature that is not currently supported by all JPA implementations. String Literals JPQL follows ... . 'Adam', '') and a single quote character in a string is represented by two single quotes (e.g. 'Adam ... ", "abcd\n1234") but this is not supported by all the JPA implementations. Unlike most other JPQL


for PessimisticLockScope.NORMAL, element collections and relationships owned by the entity ... , element collections and relationships owned by the entity that are contained in join tables ... .EXTENDED. The state of entities referenced by such relationships will not be locked (unless

JPA Exceptions

JPA exceptions are represented by a hierarchy of unchecked exceptions: java.lang.Object java ... of the JPA exception class subtree is: General errors are represented directly by the PersistenceException class. Some specific errors are represented by subclasses of PersistenceException. For example

JPA Persistence Unit

is optional when using ObjectDB, but required by JPA. persistence.xml Persistence units are defined in ... > </persistence-unit> </persistence> A persistence unit is defined by a persistence-unit XML element ... which JPA implementation should be used. ObjectDB is represented by the com.objectdb.jpa.Provider string

ObjectDB License Agreement [ver. 2.0.4]

Please read carefully this software license agreement. By downloading, installing or using ... of this agreement will be binding, unless in writing and signed by an authorized representative of each party ... authorized by this agreement. 3. The free edition of the Software includes restrictions on the number

JPA Reference (JavaDoc)

order to learn how to use JPA and ObjectDB please read the ObjectDB manual.

Step 3: Add a Main Class

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

Report Generation with BIRT and JPA

This tutorial demonstrates how to create reports based on data in an ObjectDB database using the popular open source Business Intelligence and Reporting Tools (BIRT). In order to keep things as simple as possible - we will use the basic points.odb ObjectDB database file from the Getting Started


and matches them against the declared parameters in order. The names of the declared parameters are ignored ... , declared parameters, declared variables, and ordering statements are verified for consistency. Each element ... of the query. It is then evaluated by the Boolean expression of the filter. The element passes the filter

getPersistenceManagerFactory(overrides, name, resourceLoader, pmfLoader)

that instances of all persistence-capable classes will be observed by an instance of the given ... recognized by the implementation must be ignored. Key values that are recognized but not supported by an implementation must result in a JDOFatalUserException thrown by the method. The returned

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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