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143

Query vs Extent for retrieving data

retrieve it using an Extent everything is present. We have a very simple class: public class ... explorer that all of the data is there. If I call Extent<PositionReportManagerBean> extent =     pm.getExtent(PositionReportManagerBean.class, true); I get an Extent back with all of the data as I
26

Eclipse Public License - v 1.0

against the Indemnified Contributor to the extent caused by the acts or omissions of such Commercial ... to the minimum extent necessary to make such provision valid and enforceable. If Recipient institutes patent
18

Privacy Policy

Data to the extent necessary to comply with our legal obligations (for example, if we are required
18

Database Explorer

. On the other hand, deleting an entity object that is represented by a child of an Extent node in a viewer window
5

[ODB1] Chapter 4 - JDO Metadata

" /> <class name="D" requires-extent="false" /> </package> </jdo> A JDO metadata file ... , which includes the package name, has to be specified. requires-extent (true | false) By default, JDO manages an extent for every persistent class. An extent enables iteration over persistent instances
5

[ODB1] Chapter 9 - ObjectDB Explorer

To" menu command, or the equivalent "Construct Objects" context menu command. Select an Extent in a viewer ... (which is represented by a child of an Extent node in a browser window and by a row in a table window) deletes ... reachable (by navigation from Extent objects or from roots using persistence reference fields
5

[ODB1] Chapter 2 - A Quick Tour

39 // Print all the Persons in the database: 40 Extent extent = pm.getExtent(Person.class, false); 41 Iterator itr = extent.iterator(); 42 ... extent.closeAll(); 45 46 // Commit the transaction: 47 pm
3

JDO Reference (JavaDoc)

Java/JDO API Reference (based on the JDO 2.2 JavaDoc)
2

javax.jdo.JDOEntityManager

has been closed Since: JPA 2.0 Extent<T> getExtent(Class<T> persistenceCapableClass) Equivalent to getExtent ... : persistenceCapableClass - Since: JDO 2.0 See Also: getExtent(Class,boolean) Extent<T> getExtent ... an Extent of instances in the data store that might be iterated or given to a Query. The Extent
2

javax.jdo.PersistenceManager

See Also: setDetachAllOnCommit(boolean) Extent<T> getExtent(Class<T> persistenceCapableClass) Equivalent to getExtent ... : persistenceCapableClass - Since: JDO 2.0 See Also: getExtent(Class,boolean) Extent<T> getExtent(Class<T ... of instances in the data store based on the class of the instances. This method returns an Extent

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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