/// <summary>
/// Determines whether two Result Sets are equal.
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
/// <remarks>
/// Experimental and not yet complete.
/// </remarks>
public override bool Equals(object obj)
{
if (obj == null)
{
return(false);
}
if (obj is SparqlResultSet results)
{
// Must contain same number of Results to be equal
if (Count != results.Count)
{
return(false);
}
// Must have same Boolean result to be equal
if (Result != results.Result)
{
return(false);
}
// Must contain the same set of variables
if (Variables.Count() != results.Variables.Count())
{
return(false);
}
if (!Variables.All(v => results.Variables.Contains(v)))
{
return(false);
}
if (results.Variables.Any(v => !_variables.Contains(v)))
{
return(false);
}
// If both have no results then they are equal
if (Count == 0 && results.Count == 0)
{
return(true);
}
// All Ground Results from the Result Set must appear in the Other Result Set
List <SparqlResult> otherResults = results.OrderByDescending(r => r.Variables.Count()).ToList();
List <SparqlResult> localResults = new List <SparqlResult>();
int grCount = 0;
foreach (SparqlResult result in Results.OrderByDescending(r => r.Variables.Count()))
{
if (result.IsGroundResult)
{
// If a Ground Result in this Result Set is not in the other Result Set we're not equal
if (!otherResults.Remove(result))
{
return(false);
}
grCount++;
}
else
{
localResults.Add(result);
}
}
// If all the Results were ground results and we've emptied all the Results from the other Result Set
// then we were equal
if (Count == grCount && otherResults.Count == 0)
{
return(true);
}
// If the Other Results still contains Ground Results we're not equal
if (otherResults.Any(r => r.IsGroundResult))
{
return(false);
}
// Create Graphs of the two sets of non-Ground Results
SparqlResultSet local = new SparqlResultSet();
SparqlResultSet other = new SparqlResultSet();
foreach (String var in _variables)
{
local.AddVariable(var);
other.AddVariable(var);
}
foreach (SparqlResult r in localResults)
{
local.AddResult(r);
}
foreach (SparqlResult r in otherResults)
{
other.AddResult(r);
}
// Compare the two Graphs for equality
SparqlRdfWriter writer = new SparqlRdfWriter();
IGraph g = writer.GenerateOutput(local);
IGraph h = writer.GenerateOutput(other);
return(g.Equals(h));
}
else
{
return(false);
}
}