<s>
Apache	B-Language
Wicket	I-Language
,	O
commonly	O
referred	O
to	O
as	O
Wicket	B-Language
,	O
is	O
a	O
component-based	O
web	B-Application
application	I-Application
framework	I-Application
for	O
the	O
Java	B-Language
programming	I-Language
language	I-Language
conceptually	O
similar	O
to	O
JavaServer	B-Language
Faces	I-Language
and	O
Tapestry	B-Language
.	O
</s>
<s>
In	O
each	O
request	O
cycle	O
,	O
the	O
incoming	O
request	O
is	O
mapped	O
to	O
a	O
method	O
on	O
a	O
controller	O
object	O
,	O
which	O
then	O
generates	O
the	O
outgoing	O
response	O
in	O
its	O
entirety	O
,	O
usually	O
by	O
pulling	O
data	O
out	O
of	O
a	O
model	O
to	O
populate	O
a	O
view	O
written	O
in	O
specialized	O
template	B-Application
markup	I-Application
.	O
</s>
<s>
In	O
contrast	O
,	O
Wicket	B-Language
is	O
closely	O
patterned	O
after	O
stateful	B-Application
GUI	B-Application
frameworks	O
such	O
as	O
Swing	B-Language
.	O
</s>
<s>
Wicket	B-Language
applications	O
are	O
trees	O
of	O
components	O
,	O
which	O
use	O
listener	O
delegates	O
to	O
react	O
to	O
HTTP	B-Protocol
requests	I-Protocol
against	O
links	O
and	O
forms	O
in	O
the	O
same	O
way	O
that	O
Swing	B-Language
components	O
react	O
to	O
mouse	O
and	O
keystroke	O
events	O
.	O
</s>
<s>
Wicket	B-Language
is	O
categorized	O
as	O
a	O
component-based	O
framework	O
.	O
</s>
<s>
Wicket	B-Language
uses	O
plain	O
XHTML	B-Language
for	O
templating	O
(	O
which	O
enforces	O
a	O
clear	O
separation	O
of	O
presentation	O
and	O
business	B-Architecture
logic	I-Architecture
and	O
allows	O
templates	O
to	O
be	O
edited	O
with	O
conventional	O
WYSIWYG	B-Application
design	O
tools	O
)	O
.	O
</s>
<s>
Each	O
component	O
is	O
bound	O
to	O
a	O
named	O
element	O
in	O
the	O
XHTML	B-Language
and	O
becomes	O
responsible	O
for	O
rendering	O
that	O
element	O
in	O
the	O
final	O
output	O
.	O
</s>
<s>
The	O
page	O
is	O
simply	O
the	O
top-level	O
containing	O
component	O
and	O
is	O
paired	O
with	O
exactly	O
one	O
XHTML	B-Language
template	O
.	O
</s>
<s>
The	O
framework	O
does	O
not	O
have	O
knowledge	O
of	O
how	O
components	O
interact	O
with	O
their	O
models	O
,	O
which	O
are	O
treated	O
as	O
opaque	B-Device
objects	O
automatically	O
serialized	B-Application
and	O
persisted	B-Application
between	O
requests	O
.	O
</s>
<s>
Wicket	B-Language
does	O
not	O
mandate	O
any	O
particular	O
object-persistence	O
or	O
ORM	B-General_Concept
layer	O
,	O
so	O
applications	O
often	O
use	O
some	O
combination	O
of	O
Hibernate	B-Library
objects	O
,	O
EJBs	B-Language
or	O
POJOs	O
as	O
models	O
.	O
</s>
<s>
In	O
Wicket	B-Language
,	O
all	O
server	O
side	O
state	O
is	O
automatically	O
managed	O
.	O
</s>
<s>
Wicket	B-Language
aims	O
for	O
simplicity	O
.	O
</s>
<s>
There	O
are	O
no	O
configuration	O
files	O
to	O
learn	O
in	O
Wicket	B-Language
.	O
</s>
<s>
Wicket	B-Language
is	O
a	O
simple	O
class	O
library	O
with	O
a	O
consistent	O
approach	O
to	O
component	O
structure	O
.	O
</s>
<s>
A	O
Hello	O
World	O
Wicket	B-Language
application	O
,	O
with	O
four	O
files	O
:	O
</s>
<s>
The	O
XHTML	B-Language
template	O
.	O
</s>
<s>
The	O
servlet	B-Application
application	O
Deployment	B-Language
Descriptor	I-Language
,	O
which	O
installs	O
Wicket	B-Language
as	O
the	O
default	O
handler	O
for	O
the	O
servlet	B-Application
and	O
arranges	O
for	O
HelloWorldApplication	O
to	O
be	O
instantiated	O
at	O
startup	O
.	O
</s>
<s>
Apache	B-Language
Wicket	I-Language
VersionsSeriesDescriptionLatest	O
releaseLatest	O
release	O
dateMoving	O
to	O
Java	B-Language
11	O
as	O
the	O
required	O
minimum	O
platform	O
,	O
migrated	O
from	O
JUnit	O
4	O
to	O
5	O
,	O
support	O
for	O
Java	B-Language
12	O
and	O
13	O
,	O
rework	O
page	O
and	O
data	O
storage	O
and	O
other	O
improvements.Announcing	O
Apache	B-Language
Wicket	I-Language
9	O
:	O
get	O
into	O
the	O
modern	O
Java	B-Language
world	O
!	O
.	O
</s>
<s>
wicket.apache.org	O
.	O
</s>
<s>
Retrieved	O
on	O
2020-10-05.9.7.02021-12-01Moving	O
to	O
Java	B-Language
8	O
as	O
the	O
required	O
minimum	O
platform	O
.	O
</s>
<s>
Support	O
for	O
Lambdas	O
,	O
required	O
Servlet	B-Application
API	O
version	O
moving	O
to	O
3.1	O
,	O
support	O
for	O
the	O
new	O
types	O
for	O
handling	O
dates	O
and	O
other	O
improvements.Announcing	O
Apache	B-Language
Wicket	I-Language
8	O
:	O
Write	O
Less	O
,	O
Achieve	O
More	O
.	O
</s>
<s>
wicket.apache.org	O
.	O
</s>
<s>
Recommended	O
to	O
upgrade	O
to	O
9.x	O
version.8.12.02021-03-30Moving	O
to	O
Java	B-Language
7	O
as	O
the	O
required	O
minimum	O
platform	O
,	O
cross	O
site	O
request	O
forgery	O
prevention	O
,	O
support	O
for	O
inline	O
images	O
.	O
</s>
<s>
wicket.apache.org	O
.	O
</s>
<s>
Only	O
security	O
fixes	O
,	O
recommended	O
to	O
upgrade	O
to	O
9.x	O
version.7.18.02021-04-02Moving	O
to	O
Java	B-Language
6	O
as	O
the	O
required	O
minimum	O
platform	O
.	O
</s>
<s>
wicket.apache.org	O
.	O
</s>
<s>
Retrieved	O
on	O
2020-10-05.6.30.02018-12-05Improvements	O
of	O
the	O
Wicket	B-Language
features.Apache	O
Wicket	B-Language
-	O
Apache	B-Language
Wicket	I-Language
releases	O
Wicket	B-Language
1.5	O
.	O
</s>
<s>
Wicket.apache.org	O
.	O
</s>
<s>
1.5.162016-08-05Moving	O
to	O
Java	B-Language
5	O
as	O
the	O
required	O
minimum	O
platform.Apache	O
Wicket	O
-	O
Apache	B-Language
Wicket	I-Language
1.4	O
takes	O
typesafety	O
to	O
the	O
next	O
level	O
.	O
</s>
<s>
Wicket.apache.org	O
.	O
</s>
