Re: [udig-users] Problem executing process

[BrianRook <brook@xxxxxxxxxx>]

We're using a WPS implementation.  In that implementation we've created a
service called 'echo' which takes a string in and returns that same string. 
This is a demo service that was created in order to prove out the WPS
implementation.  Now we want to confirm that the xml returned by the
execution of the service that we created and the xml that describes that
service (from GetCapabilities and DescribeProcess) works with uDIG.  That
would show that the response documents are correctly formatted.  

I've setup uDIG to point to this WPS implementation and it can locate the
services so I think the GetCapabilities and DescribeProcess operations are
working.  However, I can't actually execute the service.  

I'd like to find out why.  I'm trying to determine its a problem with the
DescribeProcess response or with the Execute response.



Andrea Antonello wrote:
> 
> Hi Brian,
> can you describe a bit more what you are doing from the begin please?
> 
> Andrea
> 
> 
> On Wed, Dec 16, 2009 at 8:00 PM, BrianRook <brook@xxxxxxxxxx> wrote:
>>
>> I'm trying to run a process and I've got a real simple one that returns
>> the
>> input value (echo)  Here is the process description from uDig:
>>
>> <xml-fragment statusSupported="false" storeSupported="false"
>> wps:processVersion="1" xmlns:ows="http://www.opengis.net/ows/1.1";
>> xmlns:wps="http://www.opengis.net/wps/1.0.0";
>> xmlns:xlink="http://www.w3.org/1999/xlink";
>> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>
>>  <ows:Identifier>com.ittvis.wps.Echo</ows:Identifier>
>>  <ows:Title>Echo</ows:Title>
>>  <ows:Abstract>Returns the input</ows:Abstract>
>>  <!--<ows:Metadata xlink:title="spatial" />-->
>>  <DataInputs>
>>    <Input maxOccurs="1" minOccurs="1">
>>      <ows:Identifier>INPUT_STRING</ows:Identifier>
>>      <ows:Title>Input String</ows:Title>
>>      <ows:Abstract>String to input</ows:Abstract>
>>      <LiteralData>
>>        <ows:DataType ows:reference="xs:string"/>
>>      </LiteralData>
>>    </Input>
>>  </DataInputs>
>>  <ProcessOutputs>
>>    <Output>
>>      <ows:Identifier>OUTPUT_STRING</ows:Identifier>
>>      <ows:Title>Output String</ows:Title>
>>      <ows:Abstract>String to return</ows:Abstract>
>>      <LiteralData>
>>        <ows:DataType ows:reference="xs:string"/>
>>      </LiteralData>
>>    </Output>
>>  </ProcessOutputs>
>> </xml-fragment>
>>
>> However, on the next screen in uDig when I put in the input string and
>> hit
>> next, I get this error:
>> "Unable to recognize service, choose another".  When I click on that
>> message
>> I get an error box that says java.lang.String cannot be cast to
>> net.refractions.udig.catalog.IResolve.
>>
>> Could you help me understand what this error means?
>>
>>
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