About path

manual

Paths and Types in JPQL and Criteria API

Explains how to use object expressions (path navigation, type) in JPA/JPQL.... of these classes are assigned as arguments. Path expressions that navigate from one object to another. ... <> operators. But more often they are used in JPQL path expressions that navigate to values of simple types (number, boolean, ...

 
api-jpa

javax.persistence.criteria.Path

Represents a simple or compound attribute path from a bound type or collection, and is a "primitive" expression.(Interface of JPA)

 
api-jpa

get(attributeName)

Create a path corresponding to the referenced attribute.(Method of javax.persistence.criteria.Path)

 
manual

SELECT clause (JPQL / Criteria API)

Explains how to use the SELECT clause and projections in a JPA/JPQL query.... the following topics: Projection of Path Expressions Multiple SELECT Expressions Result ... in Criteria Queries Projection of Path Expressions JPQL queries can also return results which are not ...

 
api-jpa

Criteria Query Expressions

Reference (JavaDoc) of JPA query expression interfaces, including Expression, Predicate, Path, ParameterExpression and Subquery.... javax.persistence.criteria.Path javax.persistence.criteria.ParameterExpression ...

 
manual

Server Configuration

Explains how to set a JPA/JDO database server using ObjectDB, the fast Java object database for JPA/JDO.... = "6136" max = "0" /> <data path = "$objectdb/db-files" /> <!-- <replication ... The <data> element <data path = "$objectdb/db-files" /> The <data> element ...

 
manual

Server User List

Explains how to define and set users, directories and permissions in the ObjectDB fast Java database server for JPA/JDO.... admin = "true" > <dir path = "/" permissions = "access,modify,create,delete" /> ... password = "$$$###" > <dir path = "/$user/" permissions = "access|modify|create|delete" > ...

 
forum_thread

migration path from JPA / Hibernate

Hi. Is there a conversion tool or documentation that is of help when migrating an existing JPA solution to ObjectDB? Any recommendations or known pitfalls when it comes to ...   #1 2011-03-30 13:10 Hi. Is there a conversion tool or documentation that is of help when migrating an existing JP ...

 
manual

Logical Operators in JPQL and Criteria API

Explains how to use AND, OR and NOT in JPQL queries....  and descendant interfaces. For example, a boolean path (a field or a property) is represented by Path javax.persistence.criteria.Path JPA interface Represents ...

 
forum_thread

Can I Disable the Creation of the "log" Directory?

These are questions asked in the context of the proposed architecture described in the forum thread titled, "Sample JDO Architecture for Follow Up Questions".   ... thread mentioned above), I disable logging (by setting log path="") but the "log" directory still gets created.  A "log" directory ... use the objectdb.conf file in which you set the log path to empty, since apparently the only place in which "log" is specified in ...