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ObjectDB 2.8 Developer's Guide

you productive with ObjectDB and JPA in a short time. Guide Structure This manual is divided into ... on practical issues in order to make the reader proficient in a short time. After reading
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ObjectDB Object Database Features

.util.Date, java.sql.Date, java.sql.Time and java.sql.Timestamp. Math types: java.lang.BigInteger ... , Float and Double). java.lang.String Dates: java.util.Date, java.sql.Date, java.sql.Time and java.sql
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ObjectDB - Object Database for Java (JPA/JDO)

(ORM) tools can reduce some manual work but cannot eliminate the extra processing time, and even add ... is complex. See JPA benchmark results... Reduce development time. Improve productivity. ObjectDB
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javax.persistence.EntityManager

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 - entity ... : flushMode Since: JPA 1.0 LockModeType getLockMode(Object entity) Get the current lock mode
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GROUP BY and HAVING clauses

. Only identification variables and path expressions are currently supported in the GROUP BY clause by
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JPA Lifecycle Events

that should be applied by default to all the entity classes. Currently, default listeners
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Spring MVC JPA Tutorial - Maven Project

the zip and run the application from the command line: > mvn package jetty:run The current directory
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javax.jdo.PersistenceManagerFactory

and can only be called when the PersistenceManagerFactory is configurable (before the first time ... . The FetchGroup does not become in scope until it is added to the current set via addFetchGroups ... Since: JDO 2.2 Set getFetchGroups() Get a modifiable Set containing a mutable copy of all currently
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javax.jdo.spi.PersistenceCapable

is only valid within the current transaction. If the JDO identity is being changed in the transaction, this method returns the object id as of the beginning of the current transaction. Returns: a copy ... in the current transaction. If the JDO identity is being changed in the transaction, this method
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javax.jdo.JDOHelper

within the current transaction. Parameters: pc - the PersistenceCapable instance. Returns: a copy ... the current thread's context class loader to locate the configuration file resource(s). Get the anonymous ... /jdoconfig.xml", using the current thread's context class loader to locate the configuration file resource(s

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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