ObjectDB Database Search

; )));   System.out.println("Query: " + c); But I can can never get the grouping to occur ... persistence.xml shows the grouping happening. I've had to dumb down the domain model enough to convey ... . support Support That fixed the conditional grouping issue. Thanks.   There is a new problem now however, I'll create a new post Willks William

Hello, How can I incorporate roles/ group in ObjectDB config file? I see no support for this. For example, I would like to place several users under a given group or role, but I see no way of doing this as no such element is present  in the config file. Is it possible to have this? st.clair

and sometimes we don't get the entity by query. Have you an idea what happens here?   btc_es BTC EmbeddedSystems

groupBy (    List grouping ) Specify the expressions that are used to form groups over the query results. Replaces the previous specified grouping expressions, if any. If no grouping expressions are specified, any previously added grouping expressions are simply removed. Parameters: grouping

;  Expression ... grouping ) Specify the expressions that are used to form groups over the subquery results. Replaces the previous specified grouping expressions, if any. If no grouping expressions are specified, any previously added grouping expressions are simply removed. This method

groupBy (    Expression ... grouping ) Specify the expressions that are used to form groups over the query results. Replaces the previous specified grouping expressions, if any. If no grouping expressions are specified, any previously added grouping expressions are simply removed. Parameters

;  List grouping ) Specify the expressions that are used to form groups over the subquery results. Replaces the previous specified grouping expressions, if any. If no grouping expressions are specified, any previously added grouping expressions are simply removed. This method only overrides

groupBy (    Expression ... grouping ) Specify the expressions that are used to form groups over the query results. Replaces the previous specified grouping expressions, if any. If no grouping expressions are specified, any previously added grouping expressions are simply removed. This method

groupBy (    List grouping ) Specify the expressions that are used to form groups over the query results. Replaces the previous specified grouping expressions, if any. If no grouping expressions are specified, any previously added grouping expressions are simply removed. This method

a Country object from the database by its name: public Country getCountryByName( EntityManager em ... a value for the parameter by using the setParameter method. The setParameter method supports method chaining by returning the TypedQuery instance on which it was invoked. This allows you to chain

Using Jakarta Persistence (JPA) You can store new entities in the database either explicitly by ... . The exception is thrown either by persist , if the existing entity is currently managed by the EntityManager , or by commit . Referenced embedded objects The following code stores an Employee instance

a second-level (L2) cache of entities, which is managed by the EntityManagerFactory and shared by ... and are shared by all EntityManagerFactory and EntityManager instances for that database ... value. Persistence Unit Settings You can also enable or disable the shared cache by using a persistence

when it is persisted to the database by using an EntityManager 's persist method, which must be invoked ... about making changes to entities. A managed entity can be marked for deletion by using ... is retrieval by refresh , which always requires database access. The main role of the persistence context

Detached entities are objects in a special state where they are not managed by an EntityManager ... have limited functionality: Many JPA methods, for example, lock , do not accept detached objects. Retrieval by ... EntityManager instances. Explicit detach You can detach an entity by using the detach method: em

A connection to a database is represented by an EntityManager instance, which also provides methods ... connection by using a separate EntityManager instance for each HTTP request. The main role ... transactions. Transactions are managed by an EntityTransaction instance, which is obtained from

1. Terms By accessing and using this web site, you agree to be bound by these web site Terms ... from using or accessing this site. The materials contained in this web site are protected by ... of these restrictions and may be terminated by ObjectDB Software at any time. Upon terminating your viewing

ObjectDB should incorporate roles/ group in ObjectDB config file? I see no support for this. I would like to place several users under a given group or role, but I see no way of doing this as ... , there could be a role/ group element which would categorise the user further. This would help in authentication.   Thanks st.clair.clarke St Clair Clarke

query returns Country objects, which then become managed by the EntityManager instance em : TypedQuery ... directly. However, you can add their content to the SELECT clause by using a bound JOIN variable in ... with the containing entities. Therefore, embedded objects that are retrieved directly by a result path expression

method specifies the starting point of the result window by defining how many results to skip from ... because the setter methods in Query and TypedQuery support method chaining by returning the query object on which they were invoked. Flush mode (setFlushMode) Changes made to a database by using an EntityManager

Please read carefully this software license agreement. By downloading, installing or using ... of this agreement will be binding, unless in writing and signed by an authorized representative of each party. 1 ... by this agreement. 3. The free edition of the Software includes restrictions on the number of classes

database is accessed only by a single web application, it should be embedded in that application ... Chapter 6 . You can override this by specifying a configuration path on the command line: $ java com ... . For example, you can increase the maximum JVM heap size and improve performance by using the HotSpot JVM

files). Recording is disabled by default and can be enabled in the configuration . The ObjectDB Replayer ... . This feature is useful for two purposes: Recovering from a database failure by replaying the recorded operations. Reproducing problems during debugging by repeating a failure. Recording transactions

) numeric literals. This feature is not supported by all JPA implementations. String literals JPQL ... , 'Adam' or '' ), and a single quotation mark within a string is represented by two single quotation ... escape characters (for example, "Adam\'s" and "abcd 1234" ). However, this syntax is not supported by

and ordering, mirroring the SELECT and ORDER BY clauses in JPQL or SQL. These interfaces allow you to specify ... ;the result as an array of objects or as individual values by  index, alias string or ... of this selection in result tuples, rather than by index or string that are considered

. For step by step instructions on using BIRT with ObjectDB see the Report Generation with BIRT ... extension. To install it: Open the Install dialog box by selecting Help Install New Software... . In ... .  Select the ObjectDB BIRT/ODA feature. Complete the installation by clicking Next twice

Because an ObjectDB database is stored as a single file in the file system, you can back it up by ... it is not open in an ObjectDB server or in use by any application. ObjectDB also supports online ... You can start an online backup by executing a special query on an EntityManager ( em ) instance

that are referenced by modified entities through fields that are marked with CascadeType . PERSIST or ... an entity by modifying it within an active transaction. You do not need to invoke an EntityManager method ... classes are enhanced. Therefore, for efficiency, ObjectDB by default ignores array changes

, while Java uses its own notation, which is also used by the JDO Query Language (JDOQL). ObjectDB ... , Boolean expressions are represented by the Expression interface and its descendants. For example, a Boolean path (a field or property) is represented by Path : Path isInUN = country. get ("isInUN

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.AbstractQuery List getGroupList() Return a list of the grouping expressions. Returns empty list if no grouping expressions have been specified. Modifications to the list do not affect the query. Returns: the list of grouping expressions. Since: Jakarta Persistence (JPA) 1.0

As demonstrated in this forum thread , a mapped by collection field with lazy fetch mode is not initialized in results of a query that uses JOIN FETCH on that collection field (when enhancement is used). support Support   Build 2.4.1_06 fixes this issue (fields are now initialized

via a call to close , to allow resources to be cleaned up by the persistence provider. This approach places ... EntityManager may be obtained by dependency injection, using PersistenceContext . // inject the container ... the EntityTransaction obtained by calling getTransaction . A complete idiom for custom application

master databases, slave databases ( by using one or more elements), and databases that are not ... by a server on localhost:6000 and a slave database managed by a server on localhost:6001 . In ... ;user=b;password=b" ); A composite URL contains two or more database URLs separated by a pipe character

named queries instead of dynamic queries can improve code organization by separating JPQL query ... , you should choose names carefully to avoid collisions, for example, by using the unique entity name as ... Queries at Runtime At runtime, named queries are represented by the Query and TypedQuery interfaces

: The configuration path By default, the configuration file is loaded from $objectdb/objectdb.conf ... . You can also define $objectdb explicitly by setting the objectdb.home system property: System.setProperty ... an argument to the JVM: $ java "-Dobjectdb.home=/odb" ... The configuration file By default

attribute specifies how non-enhanced classes are handled. ObjectDB can manage non-enhanced classes by ... . The valid values are "weak" , "soft" , and "strong" . Modified entities are always held by strong ... attribute specifies the size of the shared level-2 cache that is managed by

This chapter demonstrates basic ObjectDB and JPA concepts by introducing a simple example program ... is represented by an object with two int fields, x and y , that store the point's x and y coordinates. The program demonstrates CRUD database operations by storing, retrieving, updating, and deleting

manage broad persistence issues by using the base class. The exception hierarchy is as follows ... and locking exceptions Lock acquisition failures during updates or retrieval are indicated by : Thrown ... : Thrown by Query.getSingleResult() when the query returns no results. Thrown by Query.getSingleResult

the example, SSL is disabled by default. Enable SSL when accessing remote ObjectDB databases ... by using the JDK keytool utility: https://docs.oracle.com/javase/6/docs/technotes/tools/solaris/keytool.html By using these keystore and truststore files, a client can verify during the SSL handshake

Jakarta Persistence (JPA) Annotation Type jakarta.persistence.NamedEntityGraphs Implemented Interfaces: Annotation Target: Type Used to group NamedEntityGraph annotations. See Also: NamedEntityGraph Since: Jakarta Persistence (JPA) 2.1 Annotation Elements NamedEntityGraph[] value Since: Jakarta

Jakarta Persistence (JPA) Annotation Type jakarta.persistence.Converts Implemented Interfaces: Annotation Target: Method, Field, Type Used to group Convert annotations. Multiple converters must not be applied to the same basic attribute. See Also: Convert Since: Jakarta Persistence (JPA) 2.1

Jakarta Persistence (JPA) Annotation Type jakarta.persistence.SequenceGenerators Implemented Interfaces: Annotation Target: Type, Method, Field, Package Used to group SequenceGenerator annotations. See Also: SequenceGenerator Since: Jakarta Persistence (JPA) 2.2 Annotation Elements

Operations on the database will be performed by an instance of a session bean (EJB) class that we will define in this step: Open the [New Session Bean] dialog box by right clicking the guest package ... getAllGuests() { TypedQuery query = em.createQuery( "SELECT g FROM Guest g ORDER BY g.id", Guest.class

Operations on the database will be performed by an instance of a session bean (EJB) class that we will define in this step: Open the [New Java Class] dialog box by right clicking the guest package ... Guest g ORDER BY g.id", Guest.class); return query.getResultList(); } } The GuestDao session bean (EJB

We start by installing the BIRT development environment and the ObjectDB data source driver ... IDE for Java EE Developers. Update your existing Eclipse IDE for Java EE Developers environment by ... an existing  Eclipse IDE for Java EE Developers environment: Open the [Install] dialog box by

Operations on the database will be performed by an instance of a Data Access Object (DAO) that we will define in this step as a Spring MVC component: Open the [New Java Class] dialog box by right ... () { TypedQuery query = em.createQuery( "SELECT g FROM Guest g ORDER BY g.id", Guest.class); return

Operations on the database will be performed by an instance of a Data Access Object (DAO) that we will define in this step as a Spring MVC component: Open the [New Java Class] dialog box by right ... getAllGuests() { TypedQuery query = em.createQuery( "SELECT g FROM Guest g ORDER BY g.id", Guest.class); return

The Guest entities will be stored in an ObjectDB database, which will be represented by a JPA's ... if not existing yet) when the web application starts, by instantiating an EntityManagerFactory . The database will be closed when the web application stops (or when the web server shuts down), by closing

In this final step we will add a simple table to the report: Open the [Insert Table] dialog box by ... ) layout. Set the column number to 2 , number of details to 1 , select the data set (e.g. Points by X ) in the third field and click OK . Fill the table with data by dragging the x and y columns from

We start by creating a new Eclipse Dynamic Web Project: Open the [New Project] dialog box, e.g. by ... as a new server by clicking the New Runtime... button . Follow the instructions and specify the path ... web project. Now, add ObjectDB support to the new Eclipse Project - by dragging the objectdb

The Guest entities will be stored in an ObjectDB database, which will be represented by a JPA's ... if not existing yet) when the web application starts, by instantiating an EntityManagerFactory . The database will be closed when the web application stops (or when the web server shuts down), by