You may want to make a feature request that "getMethod" be implemented by all;
and for those that don't have a nice human readable description they could
return null? Although for many cases the "method" could be obvious from the
class name the that is implementing the work?
--
Jody Garnett
On Wednesday, 10 August 2011 at 3:20 AM, lasun wrote:
> Hi,
> We are using Geotools v2.6.5 to perform coordinate transformation
> operations. We need to display to our users the details of the transform
> method that will be used during the conversion but we can't find a method on
> the CoordinateOperation interface that tells us what transform method(s) it
> uses. We can only get the detailed description by calling toString() on
> CoordinateOperation but this has too much detail (we want a short one-line
> description.) We noticed that some concrete classes implementing
> CoordinateOperation interface have a getMethod() method which returns an
> OperationMethod object which we can call getName().getCode() which returns a
> good description but this relies on casting and isn't available for all
> CoordinateOperations. Is there an alternative way to get a brief
> description of the transform method?
>
> The following is the code we used:
>
> CoordinateOperationFactory coFactory =
> CRS.getCoordinateOperationFactory(true);
> CoordinateReferenceSystem srcCrs = CRS.decode("EPSG:4267");
> CoordinateReferenceSystem toCrs = CRS.decode("EPSG:4269");
> CoordinateOperation coorOperation = coFactory.createOperation(srcCrs,
> toCrs);
> List<SingleOperation> ops =
> ((DefaultConcatenatedOperation)coorOperation).getOperations();
> String methods = "";
> for (SingleOperation op : ops)
> {
> methods += op.getName().getCode() + "->";
> }
>
> if (methods.endsWith("->"))
> { methods = methods.substring(0, methods.lastIndexOf("->")); }
>
> In this example the output is "Geocentric transform->Datum shift->Geocentric
> transform" but this only works for cases where the transform operations is a
> DefaultConcatenatedOperation.
>
> --
> View this message in context:
> http://osgeo-org.1803224.n2.nabble.com/Problem-to-get-the-transform-method-name-tp6668947p6668947.html
> Sent from the geotools-gt2-users mailing list archive at Nabble.com
> (http://Nabble.com).
>
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