[Gvsig_english] WMS layer's STYLE properties in requests
fla83tn at libero.it
fla83tn at libero.it
Thu Nov 26 12:54:35 CET 2009
Hi to all,
I'm using v1.9 build 1253 of gvSIG and I've experienced some
annoying problem when trying to import a Digital Elevation Model layer exposed
by
UMN Mapserver via WMS as a raster.
The problem is that gvSIG tries to
download WMS layers appending to the request a STYLE=null parameter, which is
not supported by UMN Mapserver.
Just try, for example, to import the WMS
service
http://wms.pcn.minambiente.it/cgi-bin/mapserv.exe?
map=/ms_ogc/service/dtm_20m.map
You'll se that the layer will not load. The
error is caused in WMSProtocolHandler of libRemoteService that check the length
of the styles vector:
if (v != null && v.size() > 0) {...}
Indeed, the vector
is not null and has length=1, but all of its elements are null....and this is
cause of the method Vector2CS of class Utilities.
My suggestion is to cahnge
the following method in Utilities.java (libRemoteService project):
public
static String Vector2CS(Vector v) {
String str = new String();
if (v !=
null)
{
int i;
for (i=0; i<v.size() ;i++)
{
str = str + v.
elementAt(i);
if (i<v.size()-1)
str = str + ",";
}
}
return
str;
}
with:
public static String Vector2CS(Vector v) {
String str = new
String();
if (v != null) {
int i;
for (i = 0; i < v.size(); i++) {
Object currentElement = v.elementAt(i);
if (currentElement != null) {
str = str + currentElement;
if (i < v.size() - 1) {
str = str + ",";
}
}
}
}
return str;
}
Another problem is to fix the problem
at an upper level, that is, find WHY the styles vector has length=1 but all of
its elements are null...
Best regards,
Flavio
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