About constructor

tutorial

Step 2: Define a JPA Entity Class

Explains how to define a JPA entity class in an Eclipse Web Application. To store objects in an ObjectDB database using JPA we need to define an entity class: Open the [New Java Class] dialog box, e.g. by right clicking the project node (in the [Package Explorer] window) and selecting New > Class ...

 
doc

getCause()

Returns the cause of this throwable or null if the cause is nonexistent or unknown.(Method of java.lang.Throwable)

 
forum_thread

can't get HashMap out of the database

I'm trying to persist an Entity containing a HashMap. It stores the data in the database OK, but the map is always empty when I get the entity out of the database again. I've reproduced this problem in a simple variation of the Guestbook tutorial: Guest class: ===================== #1 2011-11-04 09:35 I'm trying to persist an Entity containing a HashMap. It stores the data in the database OK, but the map is a ...

 
api-jdo

toString()

Return the String form of the object id.(Method of javax.jdo.identity.ObjectIdentity)

 
tutorial

Step 2: Entity Class and Persistence Unit

Explains how to define a JPA entity class and a persistence unit (persistence.xml) in a NetBeans Spring MVC web application project. To store objects in an ObjectDB database using JPA we need to define an entity class: Open the [New Entity Class] dialog box, e.g. by right clicking the project node (in the [Projects] window) and selecting  New > Entity Class ... (or  New ...

 
tutorial

Step 2: Entity Class and Persistence Unit

To store objects in an ObjectDB database using JPA we need to define an entity class: Open the [New Java Class] dialog box, e.g. by right clicking the project node (in the [Package Explorer] window) and selecting  New > ...

 
doc

initCause(cause)

Initializes the cause of this throwable to the specified value.(Method of java.lang.Throwable)

 
forum_thread

Criteria query error: Unexpected query token

Using JPA2, I can save entities now in JBoss, and also fetch them uniquely by id. However, if I try to fetch it by getting back all instances (e.g. findAll, I get the following error:   ... is expected) [Proxied because : Could not find suitable constructor] at ...

 
api-jpa

multiselect(selections)

Specify the selection items that are to be returned in the query result.(Method of javax.persistence.criteria.CriteriaQuery)

 
forum_thread

NullPointerException while setting a new property value

Hello, we are using ObjectDB version 2.4.4 and we are unable to resolve following NPE on enhanced entity: java.lang.NullPointerException at com.objectdb.o.ENT.beforeModifyMember(ENT.java:1099) at model.PluginMetaData.__odbSet_maxAllowedDownloads(PluginMetaData.java:1) at model.PluginMetaData.setMaxAllowedDownloads(PluginMetaData.java:268) at model.PluginMetaData.setPluginDescriptor(PluginMetaData.java:94) PluginMetaData looks like this (nothing extraordinary, no relationship to other @entities): #1 2012-10-22 22:34 Hello, we are using ObjectDB version 2.4.4 and we are unable to resolve following NPE on enhanced entity: ...