db4o

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Deleting Child Entities in JDO

I would like to know if the following is possible in JDO. I have a 1-N relationship between a Parent and a Child class. So my classes look like[详细]

2023-03-21 20:16 分类：问答
db4o getting history of container

var config = Db4oEmbedded.NewConfiguration (); using (var container = Db4oEmbedded.OpenFile (config, FILE))[详细]

2023-03-16 01:18 分类：问答
xhange classes attributes in existing db4o in android

I\'m considering to use db4o in my android project to store objects but my concern is if in the future I want to change one of the objects attributes how do i deal with the existing data of that objec[详细]

2023-03-14 13:30 分类：问答
db4o - DatabaseClosedException

I am trying to store an entity with db4o through an arquillian test case and am getting a DatabaseClosedException:[详细]

2023-03-14 02:35 分类：问答
Using javasist GWT and DB4O

Is there any open source work done yet on javasist, DB4o and GWT, what I need is you create dynamic objects store them in database and th开发者_JAVA百科en view them on the client side, I am wondering[详细]

2023-03-10 02:34 分类：问答
Can I query db4o for all objects implementing some interface?

i have a problem with db4o and I wanna know is it feature or bug. Let\'s see some code private interface IInterfac开发者_如何学JAVAe {}[详细]

2023-03-09 19:52 分类：问答
db4o creating event not fire on db4o 8

i am using db4o 8 with c# 3.5, The TA and TP is enabled on all of my domain model cla开发者_JAVA技巧sses.[详细]

2023-03-08 21:20 分类：问答
db4o - data partitioning

Is it possible to partition data within db4o? I didn\'t find much in regards to it being supported on their site directly.I\'d like to keep data around, but migrate it to a different area if it isn\'[详细]

2023-03-06 20:43 分类：问答
db4o best practice to query objects from db

I am using two different ways to query objects in db4o and I would like to discuss about it. 1) In this first example, I create an instance of ObjectContainer, I open the connection, and then I close[详细]

2023-03-06 00:28 分类：问答
Db4o is extremely slow in Eclipse debug mode

I\'m working with a db4o database and have a database of approximately 1000-5000 objects on Mac OS X, developing in Eclipse Helios.[详细]

2023-03-04 16:44 分类：问答