ObjectDB ObjectDB

Internal Website Search

11-20 of 200 resultsRefresh
131

Problem with byte arrays in JDO - internal exception

Problem with byte arrays in JDO - internal exception
26

Exception on comparing array fields against parameters in queries

Exception on comparing array fields against parameters in queries
26

not possible to add an existing object to an array via explorer

not possible to add an existing object to an array via explorer
25

JPA Persistable Types

, Date and Math types. Multi value types - Collections, Maps and Arrays. Miscellaneous types: Enum ... , Hashtable, WeakHashMap, IdentityHashMap, LinkedHashMap, TreeMap and Properties. Arrays (including multi dimensional arrays). Both generic (e.g. ArrayList<String>) and non generic (e.g. ArrayList
22

Updating JPA Entity Objects

in chapter 5. However, detecting changes to arrays requires using snapshots even if the entity classes are enhanced. Therefore, for efficiency purposes, the default behavior of ObjectDB ignores array ... ().commit(); As demonstrated above, array changes are not detected automatically (by default
20

Entity Management Settings

" on-persist="false" on-commit="true" /> <dirty-tracking arrays="false" /> </entities ... than double cascade) is sufficient. The <dirty-tracking> element <dirty-tracking arrays="false" /> The arrays attribute of the <dirty-tracking> element specifies if modifications to array cells
17

Database Schema Evolution

any date type to any date type. From any collection or array type to any collection or array type, as ... collection or array that can contain that object as en element. From any map type to any map type as
17

ObjectDB Object Database Features

and array elements are indexable (extremely fast JOIN queries). Map keys and values are indexable ... , WeakHashMap, IdentityHashMap, LinkedHashMap, TreeMap and Properties. Arrays, including multidimensional arrays. Any other serializable type. Lifecycle Events JPA callback methods and listener classes. JDO
2

[ODB1] Chapter 6 - Persistent Objects

by passing a collection or array of objects to makePersistentAll(...), which is another method ... collection or array in the database, but not the collection or array itself (unlike passing a collection ... yet, without waiting for them to be accessed. A collection or array of persistent objects can be passed
1

[ODB1] Chapter 7 - JDOQL Queries

its subclasses), otherwise the query execution throws a JDOUserException. Array and Maps ... [] parameters) Arguments can be passed in an array: Query query = pm.newQuery(Person.class ... = (Collection)query.executeWithMap(args); Arrays and maps of parameters are useful mainly in executing

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.

Need Help?

  1. Search ObjectDB website
  2. Read the FAQ
  3. Follow the Tutorials
  4. View or post in the forum
  5. Search or file an issue
  6. Contact support