[Geotools-gt2-users] Error encoding ID Filter to XML

[<Mi...@ge...>]

Hello,

maybe someone can help me with my problem.

I want to encode an ID filter into xml and it does not work.

When calling encode with an ID filter i get a RunntimeException: Failed to
get Property : fid

-------------expample------------

//function to create the id filter
    public static Filter getIdFilter(String fid) throws Exception{
        HashSet setID=new HashSet();
        setID.add(filterFactory.featureId(fid));
        return filterFactory.id(setID);
    }

//Function to encode the id filter
  public String encode(Filter filter) throws Exception{
                Encoder encoder = new Encoder( new
org.geotools.filter.v1_0.OGCConfiguration() );
                OutputStream xml = new StringOutputStream();
                encoder.encode( filter, org.geotools.filter.v1_0.OGC.Filter,
xml );
                strFilter=xml.toString();
                return strFilter
  }

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