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About Metadata API

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Manual
71

FROM clause (JPQL / Criteria API)

Explains how to use the FROM clause and JOIN expressions in a JPA/JPQL query.
Manual
71

Logical Operators in JPQL and Criteria API

Explains how to use AND, OR and NOT in JPQL queries.
JPA Doc
71

JPA Metamodel API

The JPA Metamodel API, which is introduced in JPA 2.0, enables examining the classes, fields and properties of the persistent object model, similarly to the Java reflection API. The main interface of the JPA Metamodel API is: Types (mainly classes) and attributes (persistent field and properties
JPA Doc
65

JPA Metamodel API Attributes

The following interfaces and enum types represent attributes (persistent fields and properties) in the JPA Metamodel API: See the Metamodel Attribute Interface Hierarchy section for more details and examples.
JPA Doc
65

JPA Metamodel API Types

The following interfaces and enum represent types in the JPA Metamodel API:  See the Metamodel Type Interface Hierarchy section for more details and examples.
FAQ
61

ObjectDB APIs

All about ObjectDB APIs in Java/JPA database - explanations, examples, references, links and related information.
JDO Doc
30

JDOPermission.GET_METADATA

Static Field javax.jdo.spi.JDOPermission JDOPermission GET_METADATA An instance of JDOPermission to be used for getMetadata permission checking. Since: JDO 1.0
JDO Doc
30

JDOPermission.MANAGE_METADATA

Static Field javax.jdo.spi.JDOPermission JDOPermission MANAGE_METADATA An instance of JDOPermission to be used for manageMetadata permission checking. Since: JDO 1.0.2
FAQ
19

Is ObjectDB better than competing object databases?

: ObjectDB is unique in supporting the standard APIs. It is the only object database with built in support for the Java Persistence API (JPA). It also supports a more recent and advanced version of the Java Data Objects (JDO) API than competing object databases. By using a standard API such as JPA
JPA Doc
18

JPA Queries

Queries are represented in JPA by the Query and TypedQuery interfaces: The JPA Query API section ... . "SELECT c FROM Country"). Criteria Query API Building dynamic queries with structure that is known ... concatenating JPQL strings into a valid complete JPQL query. JPA 2 introduced the JPA Criteria Query API, as