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JDO Doc
5

javax.jdo.Constants

, then set its value to the comma- or whitespace-delimited list of persistence-capable classes ... isolation level representing the requirement to read committed data only. Transaction isolation level representing the requirement to read committed data only. Since: JDO 2.2
Manual
5

JPA Primary Key

64 bit number (long) that is set automatically by ObjectDB for every new entity object that is stored ... key field: @Entity public class Project { @Id @GeneratedValue long id; // still set ... value generation is discussed in detail in the Generated Values section. Application Set Primary Key
Manual
5

WHERE clause (JPQL / Criteria API)

language from a specified set of languages: SELECT c, l FROM Country c JOIN c.languages l WHERE c ... Queries The CriteriaQuery interface provides two where methods for setting the WHERE clause. Single ... the WHERE clause content (overriding previously set WHERE content if any). For example, the following JPQL
JDO Doc
5

javax.jdo.JDODataStoreException

data store exceptions that can be retried. Since: JDO 1.0 JDODataStoreException() Constructs a new ... . Since: Java 1.4 void setStackTrace(StackTraceElement[] stackTrace) Sets the stack trace elements that will be returned by getStackTrace() and printed by printStackTrace() and related methods. Sets the stack
JDO Doc
5

javax.jdo.JDOFatalDataStoreException

represents data store exceptions that cannot be retried. Since: JDO 1.0 JDOFatalDataStoreException ... to this throwable. Since: Java 1.4 void setStackTrace(StackTraceElement[] stackTrace) Sets the stack ... methods. Sets the stack trace elements that will be returned by getStackTrace() and printed by
FAQ
4

What is the Java Persistence API (JPA)?

) is that in JPA data is represented by classes and objects rather than by tables and records as in JDBC. Using plain old Java objects (POJO) to represent persistent data can significantly simplify database ... are Object Relational Mapping (ORM) tools. The mapping bridges between the data representation in
Tutorial
4

Step 1: Install BIRT and ObjectDB Driver

We start by installing the BIRT development environment and the ObjectDB data source driver ... , and finally approving the installation and restarting the IDE. Installing the ObjectDB Data Source Driver To install the ObjectDB data source driver for BIRT: Open the [Install] dialog box by selecting Help
JDO Doc
4

javax.jdo.Extent

the entire collection of instances in the data store of the candidate class or interface possibly ... all instances of a particular class or interface to execute a Query in the data store over all instances ... contains all instances of a particular class or interface in the data store; this method returns
Manual
4

Deleting JPA Entity Objects

, which is another entity class. Due to the CascadeType.REMOVE setting, when an Employee instance is removed the operation ... . The difference between the two settings is in the response to disconnecting a relationship. For example, such as when setting the address field to null or to another Address object. If orphanRemoval=true
Manual
4

GROUP BY and HAVING clauses

for setting the GROUP BY and HAVING clauses. For example, the following JPQL query: SELECT c ... of expressions in another form of groupBy). Setting a HAVING clause is very similar to setting a WHERE clause ... (and uses an AND conjunction). When a groupBy or a having method is invoked, previously set values (if any) are discarded.