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Unable to persist TreeMap

instance with an empty map? support Support My version of the test now runs correctly also, after I deleted

Using Enum type in NamedQuery: Field is not found in type

with an empty database: import java.util.*; import javax.persistence.*; public final

Fetching Collections Puzzle

empty - but as soon as your application accesses its content (e.g. by invocation of the size method

Possible Bug in MEMBER OF

the WHERE clause. Build 2.3.3_01 provides a temporary fix that makes your query work. Still SIZE and IS EMPTY

LEFT (OUTER) JOIN problem when mappedBy is defined

Hi all, I want to get objects with their lists, even when the lists are empty. So I've witten this query: "SELECT i FROM Invoice i LEFT OUTER JOIN i.itemList items" But this query never returns invoices without items! Only invoices with items. When I remove mappedBy from @OneToMany annotation, LEFT

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: ===================== @Entity

Dont want to use Proxy Class

could see the paramString and size of paramArrayOfByte is not empty. This kind of runtime error appears when we use

Some details about db behavior

Suppose I have two entities... A B -> A B has a ManyToOne relationship with A. When my database is empty and I persist a valid B entity (that contains actual A reference) I observe some behavior that I'm not sure I understand. 1. In ObjectDB explorer I see Both B and A Entity classes available in

Conflicting modifiers .... (javax.persistence.Id, javax.persistence.ManyToOne)

Container() { // Empty constructor for JPA } public void generateMapItems(Integer numberToGen

[ObjectDB 2.5.5_03] Unexpected exception (Error 990)

. an internal loop, and if the the internal loop is empty for a specific Unit, that Unit is ignored

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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