Java Reference
In-Depth Information
Furthermore, in the following algorithms, the version ids are thought of as being divided into
tuples, and are normalized to have the same number of elements. For example,
1.4
and
1.2.2.008
, when compared, become respectively (1,4,0,0) and (1,2,2,008).
Exact Match
The algorithm for the exact match is intended to function as follows:
The first parts,
v1H
and
v2H
,must be the same (that is, as in the
String
's
equals(..)
method),
and
v1T
matches exactly
v2T
,or they are both empty (
v1T==V2T==””
).
Prefix Match
Similarly, the algorithm for prefix match is defined as follows:
The first parts,
v1H
and
v2H
,must be the same, and
v1T
is a prefix match of
v2T
,or
v1T
is empty (
v1T==””
).
Version Ids Ordering
For the ordering of two different Version Ids, the algorithm is as follows:
v1
>
v2
if at least one of the following is true:
•
v1H
>
v2H
,
•
v1H
==
v2H
and
v1T
!=”” and
v2T
!=””,
•
v1H
==
v2H
and
v1T
>
v2T
recursively.
Server
The server-side of the JNLP specification describes the protocol involved in sending the
requested material to the JNLP Client. The protocol is greatly simplified by relying completely
on the HTTP protocol. Basically, the server reacts to
GET
requests from JNLP Clients.
General Response
Due to the different kinds of requests, the JNLP protocol encourages the use of error codes for
the more common problems, as reported in the following table.
Error Code
Error Description
10
Resource Not Found(HTTP error 404)
11
Could Not Locate Requested Version
99
Unknown Error
