1 | Detached Entity Objects serialized object) is constructed as a detached entity object since is not associated with any ... Address instance, which is then automatically detached as well. Cascading may continue recursively ... Address instance, which is then automatically merged as well. Cascading may continue recursively |
1 | JPA Named Queries carefully to avoid collision (e.g. by using the unique entity name as a prefix). It makes sense ... queries to the same entity class requires wrapping them in a @NamedQueries annotation, as follows ... if that named query is defined on a class that is still unknown to ObjectDB. As a workaround |
1 | Running JPA Queries should be ran using the getResultList method, as we expect to receive multiple objects in return ... is unnecessary and the warning is avoided. The query result collection functions as any other ordinary Java ... this routine operation JPA provides an additional method, getSingleResult, as a more convenient method |
1 | JPA Metamodel API (which are referred to as managed types) in the persistent object model. Three methods can be used ... . IdentifiableType is as a super interface of: MappedSuperclassType - represents user defined mapped ... for exploring managed fields and properties (which are referred to as attributes). For example |
1 | BIRT/ODA ObjectDB DriverThe ObjectDB BIRT/ODA driver is an extension of the open source Business Intelligence and Reporting Tools (BIRT) that adds support of ObjectDB as a data source and JPQL as a data set query language ... and JPA tutorial. Driver Installation The driver is available as an Eclipse for Java EE Developers |
1 | Posting Sample Code unit). Keep the test as simple as possible - remove unnecessary code (but keep it complete and runnable). You may use the following example as an initial template for your test case: package test |
0 | Step 2: Entity Class and Persistence Unit Next). Enter Guest as the class name - use exactly that case sensitive class name. Enter guest as the package ... "/> </properties> </persistence-unit> </persistence> Now ObjectDB should be used as a JPA |
0 | Step 5: Design a BIRT Report Chart the [Select Chart Type] tab select Tube as the chart type and click Next. In the [Select Data] tab - enter row["y"] as the Y series and row["x"] as the X series, (use Ctrl + Space in these fields |
0 | Step 2: Entity Class and Persistence Unit Next). Enter Guest as the class name - use exactly that case sensitive class name. Enter guest as the package ... > </persistence> Now ObjectDB should be used as a JPA provider with the specified database url. The next step |
0 | Step 4: Create an ObjectDB Data SetQueries against the database are represented in BIRT as data sets. To create the data set: Open the [New Data Set] dialog box by right clicking the Data Sets node in the [Data Explorer] window ... a specified range: SELECT p.x as x, p.y as y FROM Point p WHERE p.x BETWEEN :low AND :high Use copy |
