/// <summary>
/// Creates a new Same Term Filter
/// </summary>
/// <param name="pattern">Algebra the Filter applies over</param>
/// <param name="var">Variable to restrict on</param>
/// <param name="term">Expression Term</param>
public SameTermFilter(ISparqlAlgebra pattern, String var, NodeExpressionTerm term)
: base(pattern, var, term, new UnaryExpressionFilter(new SameTermFunction(new VariableExpressionTerm(var), term))) { }
/// <summary>
/// Creates a new Single Value Restriction Filter
/// </summary>
/// <param name="pattern">Algebra the filter applies over</param>
/// <param name="var">Variable to restrict on</param>
/// <param name="term">Value to restrict to</param>
/// <param name="filter">Filter to use</param>
public SingleValueRestrictionFilter(ISparqlAlgebra pattern, String var, NodeExpressionTerm term, ISparqlFilter filter)
: base(pattern, var, filter)
{
this._term = term;
}
/// <summary>
/// Creates a new Identity Filter
/// </summary>
/// <param name="pattern">Algebra the Filter applies over</param>
/// <param name="var">Variable to restrict on</param>
/// <param name="term">Expression Term</param>
public IdentityFilter(ISparqlAlgebra pattern, String var, NodeExpressionTerm term)
: base(pattern, var, term, new UnaryExpressionFilter(new EqualsExpression(new VariableExpressionTerm(var), term))) { }
public bool TryCreateExpression(Uri u, List<ISparqlExpression> args, Dictionary<String,ISparqlExpression> scalarArgs, out ISparqlExpression expr)
{
Graph g = new Graph();
expr = new NodeExpressionTerm(g.CreateLiteralNode("Monkey"));
return true;
}