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Database Explorer

it from the command line as follows: > java -jar explorer.jar If explorer.jar is not in the current ... the Explorer might display cached content that does not reflect the up to date data in the database. In ... a reference to a new object (not necessarily an entity object). Field values can also be set using

ObjectDB Website - Terms and Conditions of Use

for compliance with any applicable local laws. If you do not agree with any of these terms, you are prohibited ... -commercial transitory viewing only. This is the grant of a license, not a transfer of title, and under this license you may not: modify or copy the materials; use the materials for any commercial purpose

Privacy Policy

You. Personally identifiable information may include, but is not limited to: email address ... information automatically, including, but not limited to, the type of mobile device You use ... when a Cookie is being sent. However, if You do not accept Cookies, You may not be able to use some

SELECT clause (JPQL / Criteria API)

objects, transparent update detection, support for delete, etc. Query results are not limited to entity ... - JPQL does not support the "SELECT *" expression (which is commonly used in SQL). Projection of Path Expressions JPQL queries can also return results that are not entity objects. For example

JPA Query Expressions (JPQL / Criteria)

: =, <>, <, <=,>, >=, IS [NOT] NULL, [NOT] BETWEEN, including Collection operators: [NOT] IN, IS [NOT] EMPTY, [NOT] MEMBER [OF] and the [NOT] LIKE operator. Logical operators: AND, OR, NOT. In addition, JPA queries ... , isMember, isNotMember, size). Comparison expressions (equal, notEqual, gt, ge, lt, le, between, isNull, ...) Logical expressions (and, or, not, isTrue).

JPA Primary Key

an object database, ObjectDB supports implicit object IDs, so an explicitly defined primary key is not ... of other persistable types are always stored as part of their containing entity objects and do not ... of the second entity object is 2, etc. Primary key values are not recycled when entity objects

Database Management Settings

when a database is opened and a recovery file exists, indicating that it has not been closed properly. Moving or copying a database file that has not been closed properly without its recovery file ... a database that has not been closed properly by running the Replayer tool. Recording might also be useful

JPA / JDO Class Enhancer

. There is one case, however, where enhancement is required. Non persistable classes that access directly (not ... (and actually required by JPA but not enforced by ObjectDB) to avoid accessing persistent fields ... should need to be enhanced. The enhancer silently ignores any specified class that does not need

[ODB1] Chapter 8 - ObjectDB Server

-conf config.xml start If you name your configuration file server.xml, you do not need to use ... if the –conf parameter is not used. Also, if you do not use the –conf parameter and do not create ... , you have to edit the path to the odbse.jar file, and to the JVM. It is recommended that you do not edit


. This method has no effect if a transaction is not active. If a datastore transaction is active ... might flush instances as if flush were called, but it is not required to do so. If an optimistic ... , causing all managed entities to become detached. Changes made to entities that have not been flushed

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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