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in criteria queries The criteria query API provides several ways to set the SELECT clause. Single ... it as the SELECT clause content, overriding any previously set SELECT content. Many valid criteria API expressions can be used as a selection because criteria API expressions are represented by Expression

Jakarta Persistence API (JPA) 3.2 documentation, generated from the official JavaDoc and enriched with practical notes. It groups the API types into logical sections to help you locate core concepts ... the fundamental classes and interfaces for entity management and persistence operations. Covers the query API

The Java Persistence API (JPA) is a standard API for accessing databases from within Java applications. The main advantage of JPA over JDBC (the older Java API for interacting with databases ... of the Java Persistence API (JPA). By interacting with ObjectDB using standard JPA

because it introduces the Country class to ObjectDB. Dynamic JPQL, Criteria API , and named queries In ... Criteria API provides an alternative way to build dynamic queries. It uses Java objects that represent

JPQL query: SELECT c FROM Country c WHERE c.population :p can be built using the criteria query API

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

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

All about ObjectDB API Reference in Java/JPA database - explanations, examples, references, links and related information.

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

The Jakarta Persistence (JPA) Metamodel API provides a type-safe way to introspect the persistent ... the persistence unit metadata through the main entry point interface: Serves as the central ... to retrieve entity and attribute information by class or name, similar to the reflection API in Java

your ObjectDB database. An alternative bootstrap class that offers a programmatic API for configuration ... back transactions. Utilities and Caching Access metadata , manage schema, and interact with the second-level ... attributes, and access entity content not yet fetched due to lazy loading. Provides an API for programmatic

Hi, I am using JDO access to the database with the persistence defined in package.jdo XML metadata files. In those metadata files I have few persistence-capable classes which had extents in ObjectDB ... and own OID) in those few peristence-capable ones. Example of JDO metadata :        

, that is scheduled for removal from the database upon transaction commit. The EntityManager API is used ... . Parameters: name - the name of a query defined in metadata Returns: the new query instance. Throws ... . Parameters: name - the name of a query defined in metadata resultClass - the type of the query

using the Java Persistence API (JPA). It is the first persistence solution that combined a powerful ... tutorial now...   Protect your investment. Use a standard Java API . ObjectDB became the first Object Oriented Database with built in support for the two standard Java database APIs : Java

does not provide an API to define parameters explicitly (except when using the Criteria API ). Instead ... over ordinal parameters. Criteria Query Parameters In a JPA query built using the JPA Criteria API ... , parameters are more flexible and support elements that are unavailable as literals, such as entities. API

: 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

via the PersistenceConfiguration API . Every persistence unit has a transaction type , either JTA , or RESOURCE_LOCAL . Resource ... other useful APIs : an instance of Metamodel exposing a model of the managed types associated ... , information that can be set by means of the query APIs can be overridden. Information

Jakarta Persistence provides powerful APIs for executing database queries using JPQL strings or the programmatic Criteria API . These interfaces support both static and dynamic query construction ... instructions, refer to the JPA Query API section in the ObjectDB manual. Criteria query API

metadata . A container annotation for declaring multiple @PersistenceUnit definitions on a single class

Criteria API expressions. Atomic expressions The atomic query expressions are: JPQL / Criteria Variables ... with operators and functions. Operators and functions JPQL and the Criteria API support the following ... the following pages: Detailed explanations of how to build Criteria API expressions are provided

into an ANT build script, as follows: Enhancement API The ObjectDB Enhancer can also be invoked from ... ()); The enhancement API and invocation of the Enhancer from Java code is useful, for instance, in

APIs can be overridden. Information that is overridden does not affect the named query as registered ... has been previously defined, either statically via metadata or via this method, that query definition

Jakarta Persistence (JPA) Criteria API uses a hierarchy of interfaces to model query conditions and selections, enabling the construction of dynamic, type-safe queries. These interfaces represent the building blocks for defining query logic programmatically. The hierarchy of the expression

The Jakarta Persistence (JPA) Metamodel API defines a structured hierarchy of interfaces and enumerations to represent the attributes of managed persistent types (entities, embeddable and superclasses). Metamodel Attributes Hierarchy in Jakarta Persistence (JPA) 3. Base attribute definitions

The Jakarta Persistence (JPA) Metamodel API defines a structured hierarchy of interfaces and enumerations to represent the persistent types within a domain model. Metamodel Types Hierarchy in Jakarta Persistence (JPA) 3.2 Base type definitions The core abstractions of model types

list links to detailed explanations of how to build clauses for Criteria API queries: Criteria SELECT

is developed for an existing old relational database). By using the Java Persistence API (JPA

The Jakarta Persistence (JPA) Criteria API provides a type-safe, programmatic alternative to string-based JPQL for constructing dynamic queries, ensuring compile-time safety and facilitating easier refactoring. It defines a structured hierarchy of interfaces for SELECT, UPDATE, and DELETE

JDO 3 introduces the ability to specify and query metadata of persistable types dynamically. ObjectDB 2 supports specifying metadata by: JPA XML Mapping Metadata JPA Annotations JDO XML Metadata (e.g. package.jdo) JDO Annotations All these methods are static, i.e. the metadata has to be provided

can be included in the query result by specifying this annotation in the metadata . Example: Query q = em

. Since: Jakarta Persistence (JPA) 2.0 The Paths and Types in JPQL and Criteria API article explains ... the string-based API may need to specify the type resulting from the get operation in order to avoid

Persistence (JPA) 2.0 The FROM clause (JPQL / Criteria API ) article explains how to use Root ... attribute. Note: Applications using the string-based API may need to specify the type resulting from

is used instead of Expression in this API in order to work around the fact that Java generics are not compatible with varags. Since: Jakarta Persistence (JPA) 2.0 The JPA Criteria API Queries article

parameterName - name of the parameter as registered or specified in metadata type - type of the parameter

of the parameter as registered or specified in metadata Returns: the result that is passed

metadata Returns: the new stored procedure query instance. Throws: IllegalArgumentException

- a reference to the query defined in metadata Returns: the new query instance. Throws

metadata Returns: the new query instance. Throws: IllegalArgumentException - if a query has not

. Parameters: name - the name of a query defined in metadata resultClass - the type of the query result

may be thrown as part of an API call, a flush or at commit time. The current transaction, if one is active

transaction rollback. This exception may be thrown as part of an API call, at, flush or at commit time

the string-based API may need to specify the type resulting from the Path.get operation in order

. Since: Jakarta Persistence (JPA) 2.0 The Logical Operators in JPQL and Criteria API article explains

-based API may need to specify the type resulting from the Path.get operation in order to avoid the use

Jakarta Persistence (JPA) Interface jakarta.persistence.criteria.Order An object that defines an ordering over the query results. Since: Jakarta Persistence (JPA) 2.0 The ORDER BY clause (JPQL / Criteria API ) article explains how to use Order . Public Instance Methods Expression getExpression

/ Criteria API ) article explains how to use Selection . Public Instance Methods Selection alias

the string-based API may need to specify the type resulting from the Path.get operation in order to avoid

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The Java Data Objects (JDO) is another standard for accessing persistent data in databases, using plain old Java objects (POJO) to represent the object model. Unlike Java Persistence API (JPA ... , and it is probably the most popular Java API for object databases today.