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JPA Persistable Types

types and Serializable types (user or system defined). Note: Only instances of entity classes ... : should be a top-level class (i.e. not a nested / inner class). should have a public or protected no-arg constructor. cannot be final and cannot have final methods or final instance variables. ObjectDB

Database Explorer

clicking explorer.jar or by running explorer.exe (on Windows) or explorer.sh (on Unix/Linux, after editing ... the tree). To open a new viewer window either write a query in the [Query] tabbed window or select ... ] tabbed window or an object in a currently open Table or Tree window). You can open a new viewer

Entity Management Settings

specifies enhancement related settings: The agent attribute (whose value is "true" or "false ... enhanced class. "ignore" - reflection is used for non enhanced classes - with no error or warning ... the persistence context (until commit or flush), regardless of this setting. The level2 attribute specifies

Eclipse Distribution License - v 1.0

and use in source and binary forms, with or without modification, are permitted provided ... the documentation and/or other materials provided with the distribution. Neither the name of the Eclipse Foundation, Inc. nor the names of its contributors may be used to endorse or promote products derived from

JPA Entity Fields

either the Java transient modifier (which also affects serialization) or the JPA @Transient annotation ... store methods or code. Only the persistent state of the entity object, as reflected by its persistent ... . When an entity object is stored in the database every persistent field must contain either null or a value

Schema Update

databases as a complementary operation to renaming or moving these elements in the IDE during source code ... is required when persistable classes are renamed or moved to another package. Running the application with persistable classes that have been renamed or moved in the IDE, with no matching schema configuration

Database Connection using JPA

of a persistence unit. As an extension, ObjectDB enables specifying a database URL (or path) directly, bypassing the need for a persistence unit. Any string that starts with objectdb: or ends with .odb or ... ObjectDB embedded directly in your application (embedded mode), an absolute path or a relative path

[ODB1] Chapter 3 - Persistent Classes

. Instances of these classes that represent objects in the database are called persistent objects or ... of persistent classes that live only in memory) are called transient objects or transient instances ... and fields) can have any access modifiers (i.e. public, protected, package or private). 3.2 Persistent

[ODB1] Chapter 8 - ObjectDB Server

An ObjectDB server can manage one or more databases. Databases that are managed by a server ... _HOME>/lib/odbse.jar com.objectdb.Server Or on Windows: > java -cp <OBJECTDB_HOME>\lib\odbse.jar ... the server in the background (for instance, using the & character at the end of the command line), or

[ODB1] Chapter 7 - JDOQL Queries

is 18 or older: Query query = pm.newQuery(Person.class, "this.age >= 18"); Collection result ... . The execute() method compiles and runs the query. If there is no age field in class Person or if the field ... for printing all the people whose age is 18 or older (using the toString() method of Person

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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