BoboBrowser.Browse method exception

[dtosato]

Executing this test, I get back the following error from BoboBrowser.Browse method:

BoboBrowse.Net.BrowseException was unhandled
  HResult=-2146233088
  Message=Length cannot be less or equal than 0.
Nome parametro: length
  Source=BoboBrowse.Net
  StackTrace:
       in BoboBrowse.Net.BoboSubBrowser.Browse(BrowseRequest req, Weight weight, Collector collector, IDictionary`2 facetMap, Int32 start)
       in BoboBrowse.Net.MultiBoboBrowser.Browse(BrowseRequest req, Weight weight, Collector hitCollector, IDictionary`2 facetMap, Int32 start)
       in BoboBrowse.Net.MultiBoboBrowser.Browse(BrowseRequest req, Collector hitCollector, IDictionary`2 facetMap, Int32 start)
       in BoboBrowse.Net.MultiBoboBrowser.Browse(BrowseRequest req, Collector hitCollector, IDictionary`2 facetMap)
       in BoboBrowse.Net.MultiBoboBrowser.Browse(BrowseRequest req)
       in ResultNumberTest.Program.CategoryFacetNavigation(Type facetHandlerType) in D:\TEMP\ResultNumberTest\ResultNumberTest\ResultNumberTest\Program.cs:riga 90
       in ResultNumberTest.Program.Main(String[] args) in D:\TEMP\ResultNumberTest\ResultNumberTest\ResultNumberTest\Program.cs:riga 32
       in System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       in Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       in System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       in System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       in System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       in System.Threading.ThreadHelper.ThreadStart()
  InnerException: System.ArgumentOutOfRangeException
       HResult=-2146233086
       Message=Length cannot be less or equal than 0.
Nome parametro: length
       Source=mscorlib
       ParamName=length
       StackTrace:
            in System.String.InternalSubStringWithChecks(Int32 startIndex, Int32 length, Boolean fAlwaysCopy)
            in BoboBrowse.Net.Facets.Filter.FacetRangeFilter.GetRangeStrings(String rangeString)
            in BoboBrowse.Net.Facets.Filter.FacetRangeFilter.Parse(FacetDataCache dataCache, String rangeString)
            in BoboBrowse.Net.Facets.Filter.FacetRangeFilter.ConvertIndexes(FacetDataCache dataCache, String[] vals)
            in BoboBrowse.Net.Facets.Filter.FacetRangeFilter.FacetRangeValueConverter.Convert(FacetDataCache dataCache, String[] vals)
            in BoboBrowse.Net.Facets.Range.ValueConverterBitSetBuilder.BitSet(FacetDataCache dataCache)
            in BoboBrowse.Net.Facets.Filter.BitSetFilter.GetBitSet(FacetDataCache dataCache)
            in BoboBrowse.Net.Facets.Filter.BitSetFilter.GetRandomAccessDocIdSet(BoboIndexReader reader)
            in BoboBrowse.Net.Facets.Filter.RandomAccessAndFilter.GetRandomAccessDocIdSet(BoboIndexReader reader)
            in BoboBrowse.Net.Facets.Filter.RandomAccessFilter.GetDocIdSet(IndexReader reader)
            in BoboBrowse.Net.Search.BoboSearcher2.Search(Weight weight, Filter filter, Collector collector, Int32 start, IBoboMapFunctionWrapper mapReduceWrapper)
            in BoboBrowse.Net.BoboSubBrowser.Browse(BrowseRequest req, Weight weight, Collector collector, IDictionary`2 facetMap, Int32 start)
       InnerException: 

This exception pops out only when RangeFacetHandler is used.

[NightOwl888]

As I mentioned previously, the values that are specified for selections in a RangeFacetHandler must correspond to the range strings that are specified when creating the handler.

// Specify range handler
categoryFacetHandler = new RangeFacetHandler(category, new List<string> { "[Articoli TO Clienti]", "[Clienti TO *]" });

// Specify selections
sel1.AddValue("[Articoli TO Clienti]");

Corrected version of CategoryFacetNavigation:

private static int CategoryFacetNavigation(Type facetHandlerType)
{
    // Definizione facce.
    string category = "Category";
    IFacetHandler categoryFacetHandler;
    if (facetHandlerType == typeof(SimpleFacetHandler))
    {
        categoryFacetHandler = new SimpleFacetHandler(category);
    }
    else if (facetHandlerType == typeof(MultiValueFacetHandler))
    {
        categoryFacetHandler = new MultiValueFacetHandler(category);
    }
    else if (facetHandlerType == typeof(RangeFacetHandler))
    {
        categoryFacetHandler = new RangeFacetHandler(category, new List<string> { "[Articoli TO Clienti]", "[Clienti TO *]" }); 
    }
    else
    {
        throw new InvalidOperationException("Unknown facet.");
    }

    ICollection<IFacetHandler> handlerList = new IFacetHandler[] { categoryFacetHandler };
    string indexDir = @"../../../data/index";
    using (Lucene.Net.Store.Directory idx = FSDirectory.Open(new System.IO.DirectoryInfo(indexDir)))
    {
        using (IndexReader reader = IndexReader.Open(idx, true))
        {
            using (BoboIndexReader boboReader = BoboIndexReader.GetInstance(reader, handlerList))
            {
                // Request.
                BrowseRequest browseRequest = new BrowseRequest();
                browseRequest.Count = 10;
                browseRequest.Offset = 0;

                BrowseSelection sel1 = new BrowseSelection(category);
                if (facetHandlerType == typeof(RangeFacetHandler))
                {
                    sel1.AddValue("[Articoli TO Clienti]");
                }
                else
                {
                    sel1.AddValue("Articoli");
                    sel1.AddValue("Clienti");
                    sel1.AddNotValue("Ordini");
                    sel1.SelectionOperation = BrowseSelection.ValueOperation.ValueOperationOr;
                }
                browseRequest.AddSelection(sel1);

                // Query.
                MatchAllDocsQuery query = new MatchAllDocsQuery();

                // Add the facet output specs.
                FacetSpec spec1 = new FacetSpec();
                spec1.OrderBy = FacetSpec.FacetSortSpec.OrderValueAsc;
                spec1.MaxCount = 20;
                browseRequest.SetFacetSpec(category, spec1);

                // Browse.
                IBrowsable browser = new BoboBrowser(boboReader);
                BrowseResult result = browser.Browse(browseRequest);

                // Result.
                return result.NumHits;
            }
        }
    }
}