Hi Matthias; the CSAuthorityFactory has changed a bit over time; I
confirm that the functionality you are looking for is not available on
trunk.
The intention of the getAuthorityCodes method was not to look up codes
for a Unit; but to look up codes for a specific kind of object being
managed. ... ie IdentifiedObjects all of a code - this method is
supposed to return a list of all the codes for that kind of object.
Identified objects in the system right now:
- CoordinteOperation
- CoordinateSystem
- CoordinateAxis
- Datum
- Ellipsoid
- ReferenceSystem (including CoordinateReferenceSystem)
- etc...
Now your request to look up units is also valid ... units have switch
over to JSR-275 so let us explore what they have going on. I am used to
looking up units as static constants (NonSI.FOOT and SI.METER for
example) but I know there is some run time facilities as well...
The best I can find is the SystemOfUnits.getUnits() Set<Unit<?>> method
... which both SI and NonSI extend.
I am not sure however about discovering all the SystemOfUnits
implementations on the classpath...however they must have something
because hey have parsing methods around ...
Jody
Matthias Basler wrote:
Hi all,
today I decided I should upgrade GISWidgets to use the latest GeoTools version,
namely 2.5 RC1 (it used 2.3 before). Most changes seem cosmetical and can be
solved easily, but I run into a problem where I am missing functionality in
2.5. that existed (intended or not) in 2.3.x:
How to query all available units (length, angle) from an authority factory. In
particular I want all units supported by EPSG.
I have never been able to retrieve linear and angular units separately, but
with GeoTools 2.3 the following worked:
CSAuthorityFactory csFactory = ...
Set<String> codes = csFactory.getAuthorityCodes(Unit.class);
Now this method requires the interface "IdentifiedObject", which is not
supported by the Unit class.
I had a look at the user guide, but all I found was related to
"IdentifiedObject"s.
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