About string



... eager fetch of non entity collections, such as List<String> ). Improved performance of eager fetch in queries. ...


auto-generated uuid fields

Hello, we're porting a JDO application to ObjectDB which uses uuid-hex generated values. However the page on generated values in your JPA tutorial only mentions numeric generated values, and when we try to use it the error message seems to imply that auto-generating strings isn't supported. Could you confirm whether this is the case? If so it seems an odd omission, given that it's part of both the JPA and JDO standards (JPA Generator.UUID_HEX and JDO value-strategy="uuid-hex") and that the Java language itself supports it (java.util.UUID). JDO Feature Version: 2.4.7 Priority: Normal Status: Active Replies: 5 Type:  JDO Feature ...


Step 4: Add a Servlet Class

Explains how to define an EJB session bean in an Eclipse Java EE 6 web application.... {   // Handle a new guest: String name = request. getParameter ( "name" ) ; ...


mismatch after Enum changes

Hi, I have an entity, an attribute is a enum type: public enum MyEnum { AA, BB, CC, DD; } I populated the database, than I changed the enum types deleting some unused types (es. AA) without reset database:   #1 2016-01-28 11:07 Hi, I have an entity, an attribute is a enum type: public enum MyEnum { AA, BB, ...


Storing XML files in ObjectDB

Hello, Is it possible to store XML files in ObjectDB?   Thanks ... You can also store an entire non parsed XML file as string or byte[] in one entity object. ObjectDB ...


Step 4: Add a Controller Class

Explains how to add a servlet to an Eclipse Spring MVC JPA web application project.... // Handle a new guest (if any): String name = request. getParameter ( "name" ) ; ...


JPA Query Criteria API (JPA 2.0)

The JPA Criteria API supports dynamic definition of JPQL queries using CriteriaBuilder as a factory. ObjectDB supports dynamic definition of JPQL queries as strings and expected to support also the new JPA 2 Criteria API in future versions.   JPA Feature Version: Priority: Normal Status: Fixed Replies: 2 Type:  JPA Feature ...



Applied to a persistent field or property of an entity class or mapped superclass to denote a composite primary key that is an embeddable class.(Annotation of JPA)


possible index required for improving query performance

Hi,   I have the following entity class:   @Entity @Table @Indices({ @Index(members={"relationshipType", "party"}), @Index(members={"relationshipType", "otherParty"}),     @Index(members={"relationshipType"}) }) @XmlRootElement public class Relationship implements Comparable<Relationship> { ... @ Enumerated ( EnumType . STRING ) private RelationshipType relationshipType ; ...



Interface implemented by the persistence provider.(Interface of JPA)