<s>
ObjectDB	B-Operating_System
is	O
an	O
object	B-Application
database	I-Application
for	O
Java	B-Language
.	O
</s>
<s>
Unlike	O
other	O
object	B-Application
databases	I-Application
,	O
ObjectDB	B-Operating_System
does	O
not	O
provide	O
its	O
own	O
proprietary	B-Application
API	O
.	O
</s>
<s>
Accordingly	O
,	O
working	O
with	O
ObjectDB	B-Operating_System
requires	O
using	O
one	O
of	O
the	O
two	O
standard	O
Java	B-Language
APIs	O
:	O
JPA	B-Language
or	O
JDO	B-Language
.	O
</s>
<s>
Both	O
APIs	O
are	O
built-in	O
in	O
ObjectDB	B-Operating_System
,	O
so	O
an	O
intermediate	O
ORM	B-General_Concept
software	O
is	O
not	O
needed	O
.	O
</s>
<s>
ObjectDB	B-Operating_System
is	O
a	O
cross	B-Operating_System
platform	I-Operating_System
software	O
and	O
can	O
be	O
used	O
on	O
various	O
operating	O
systems	O
with	O
Java	B-Language
SE	O
5	O
or	O
higher	O
.	O
</s>
<s>
It	O
can	O
be	O
integrated	O
into	O
Java	B-Language
EE	I-Language
and	O
Spring	B-Application
web	O
applications	O
and	O
deployed	O
on	O
servlet	O
containers	O
(	O
Tomcat	B-Language
,	O
Jetty	B-Language
)	O
as	O
well	O
as	O
on	O
Java	B-Language
EE	I-Language
application	O
servers	O
(	O
GlassFish	B-Language
,	O
JBoss	B-Language
)	O
.	O
</s>
<s>
It	O
was	O
tested	O
on	O
various	O
JVMs	B-Language
,	O
including	O
HotSpot	B-Language
,	O
JRockit	B-Language
and	O
IBM	B-Language
J9	I-Language
.	O
</s>
<s>
All	O
the	O
persistable	O
types	O
of	O
JPA	B-Language
and	O
JDO	B-Language
are	O
supported	O
by	O
ObjectDB	B-Operating_System
,	O
including	O
user	O
defined	O
entity	O
classes	O
,	O
user	O
defined	O
embeddable	O
classes	O
,	O
standard	O
Java	B-Language
collections	O
,	O
basic	O
data	O
types	O
(	O
primitive	O
values	O
,	O
wrapper	O
values	O
,	O
String	O
,	O
Date	O
,	O
Time	O
,	O
Timestamp	O
)	O
and	O
any	O
other	O
serializable	O
classes	O
.	O
</s>
<s>
ObjectDB	B-Operating_System
supports	O
both	O
traditional	O
object	B-Application
database	I-Application
IDs	O
,	O
as	O
well	O
as	O
RDBMS	O
like	O
primary	O
keys	O
,	O
including	O
composite	O
primary	O
keys	O
and	O
auto	O
value	O
generation	O
and	O
assignment	O
,	O
as	O
part	O
of	O
its	O
support	O
of	O
JPA	B-Language
,	O
which	O
is	O
mainly	O
an	O
API	O
for	O
RDBMS	O
.	O
</s>
<s>
The	O
JDO	B-Language
Query	O
Language	O
(	O
JDOQL	O
)	O
,	O
which	O
is	O
based	O
on	O
Java	B-Language
syntax	O
,	O
and	O
the	O
JPA	B-Language
Query	O
Language	O
(	O
JPQL	B-Language
)	O
,	O
which	O
is	O
based	O
on	O
SQL	B-Language
syntax	O
.	O
</s>
<s>
JPA	B-Language
2	O
criteria	O
queries	O
are	O
also	O
supported	O
.	O
</s>
<s>
ObjectDB	B-Operating_System
automatic	O
schema	B-Application
evolution	I-Application
handles	O
most	O
changes	O
to	O
classes	O
transparently	O
,	O
including	O
adding	O
and	O
removing	O
of	O
persistent	O
fields	O
,	O
changing	O
types	O
of	O
persistent	O
fields	O
,	O
and	O
modifying	O
class	O
hierarchy	O
.	O
</s>
<s>
The	O
following	O
tools	O
and	O
utilities	O
are	O
included	O
in	O
the	O
ObjectDB	B-Operating_System
distribution	O
:	O
</s>
<s>
BIRT	B-Language
Reports	I-Language
Driver	O
-	O
Adds	O
ObjectDB	B-Operating_System
as	O
a	O
BIRT	B-Language
data	O
source	O
and	O
JPQL	B-Language
/	O
JDOQL	O
queries	O
as	O
data	O
sets	O
.	O
</s>
