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javax.persistence.TypedQuery

object was set to retrieve. The position of the first result the query object was set to retrieve. Returns 0 if setFirstResult was not applied to the query object. Returns: position of the first ... object, returns the flush mode in effect for the entity manager. Returns: flush mode Since: JPA 2.0
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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
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What are the main benefits of using ObjectDB?

. The ability to store ordinary objects in the database directly can simplify the code significantly ... ObjectDB is especially designed to store and manage graphs of objects efficiently. That can accelerate the execution time of object oriented applications significantly. For instance, collection and map
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Comparison in JPQL and Criteria API

have the same type and the same primary key value. For embeddable objects, e1 = e2 if e1 and e2 ... ) can be either a criteria expression or a comparable Java object. The 2 letter methods (gt, ge, lt, le) can only be used for numeric comparison. The other methods can be used with any comparable objects
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ORDER BY clause (JPQL / Criteria API)

clause produces objects for examination and the WHERE clause selects which objects to collect as results ... . The following query returns Country objects ordered by currency as the primary sort key and by name as ... and a GROUP BY clause the SELECT clause receives groups rather than individual objects and ORDER BY
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ObjectDB Overview

The ObjectDB Object Database ObjectDB is a powerful Object-Oriented Database Management ... Features 100% pure Java Object-Oriented Database Management System (ODBMS). No proprietary API - managed ... and Spring. See the ObjectDB Object Database Features for more details.
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javax.persistence.Query

back Since: JPA 1.0 int getFirstResult() The position of the first result the query object was set to retrieve. The position of the first result the query object was set to retrieve. Returns 0 if setFirstResult was not applied to the query object. Returns: position of the first result Since: JPA 2
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javax.persistence.EntityManager

on the EntityManager instance and any Query and TypedQuery objects obtained from it will throw ... manager is container-managed Since: JPA 1.0 boolean contains(Object entity) Check if the instance ... object Returns: the new query instance Throws: IllegalArgumentException - if the criteria query
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javax.jdo.spi.PersistenceCapable

PersistenceManager, object identity, and version if it has one. In the Reference Implementation, the JDO Enhancer ... SERIALIZABLE, then the field is not declared as TRANSIENT. Since: JDO 1.0 void jdoCopyFields(Object ... fm, Object oid) Copy fields to an outside consumer from the key fields in the ObjectId. Copy fields
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javax.jdo.Query

to get results. The signature of the execute methods specifies that they return an Object ... The string constant used as the first argument to PersistenceManager.newQuery(String,Object ... as the first argument to PersistenceManager.newQuery(String,Object) to identify that the created

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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