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Java 8 time API

Java 8 time API

Literals in JPQL and Criteria Queries

are more generic and efficient because they can be compiled once and then run many times with different parameter ... ), a feature that is not currently supported by all JPA implementations. String Literals JPQL follows ... equivalent. Date and Time Literals JPQL follows the syntax of SQL and JDBC for date literals: Date - {d

ObjectDB Website - Terms and Conditions of Use

of these restrictions and may be terminated by ObjectDB Software at any time. Upon terminating your viewing ... of the materials on its web site are accurate, complete, or current. ObjectDB Software may make changes to the materials contained on its web site at any time without notice. ObjectDB Software does

Database Explorer

it from the command line as follows: > java -jar explorer.jar If explorer.jar is not in the current ... to close a currently open database connection. Viewing Database Content Viewer Windows The Explorer ... ] tabbed window or an object in a currently open Table or Tree window). You can open a new viewer

Query Parameters in JPA

with different parameter values to retrieve different results. Running the same query multiple times ... multiple times in the query string. A query can be run only after setting values for all its parameters ... for more details. Parameters vs. Literals Following is a third version of the same method, this time

JPA / JDO Class Enhancer

.Enhancer If objectdb.jar is not in the current directory a path to it has to be specified. Alternatively ... enhancement ANT tasks. Load Time (Java Agent) Enhancement Instead of enhancing classes during build ... , however, it is recommended to integrate the enhancement in the build process. To use load time enhancement in web

Locking in JPA

object. The initial version of a new entity object (when it is stored in the database for the first time ... another EntityManager) since it was retrieved by the current updater. Optimistic locking ... another EntityManager instance) currently holds a PESSIMISTIC_WRITE lock on that database object. A PESSIMISTIC

Retrieving JPA Entity Objects

. Therefore, it is recommended to avoid unnecessary time consuming operations in no-arg constructors ... specifying FetchType.LAZY in either @OneToOne or @ManyToOne annotations (currently ObjectDB does not ... in @OneToMany or @ManyToMany annotations (currently ObjectDB does not distinguish between

[ODB1] Chapter 9 - ObjectDB Explorer

of that object. Select an object in a currently open table or browser viewer to explore it in a new ... " command switches the current viewer to focus on the selected object. A double click on the target element ... of the result collection and the query execution time are displayed on the query form. If the query


if the instance is a managed entity instance belonging to the current persistence context. Check if the instance is a managed entity instance belonging to the current persistence context. Parameters: entity ... is already deleted in the current transaction. This method throws JDOUserException if the instance is transient

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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